As filed with the Securities and Exchange Commission on May 3, 2018

Registration No. 333-224311

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Amendment No. 1

to

Form S-4

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

CVB FINANCIAL CORP.

(Exact name of registrant as specified in its charter)

701 N. Haven Avenue, Suite 350

Ontario, California 91764

(909) 980-4030

(Address, including zip code, and telephone number, including area code, of registrant’s principal executive offices)

Christopher D. Myers

President and Chief Executive Officer

CVB Financial Corp.

701 N. Haven Avenue, Suite 350

Ontario, California 91764

(909) 980-4030

(Name, address, including zip code, and telephone number, including area code, of agent for service)

Copies to:

Approximate date of commencement of proposed sale to the public: As soon as practicable after this registration statement becomes effective and upon completion of the merger.

If the securities being registered on this form are being offered in connection with the formation of a holding company and there is compliance with General Instruction G, check the following box:  ☐

If this form is filed to register additional securities for an offering pursuant to Rule 462(b) under the Securities Act of 1933, as amended (the “Securities Act”), check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering:  ☐

If this form is a post-effective amendment filed pursuant to Rule 462(d) under the Securities Act, check the following box and list the Securities Act registration statement number of the earlier effective registration statement for the same offering:  ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company” and “emerging growth company” in Rule 12b-2 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”). (Check one):

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 7(a)(2)(B) of the Securities Act.  ☐

If applicable, place an X in the box to designate the appropriate rule provision relied upon in conducting this transaction:

Exchange Act Rule 13e-4(i) (Cross-Border Issuer Tender Offer)  ☐

Exchange Act Rule 14d-1(d) (Cross Border Third-Party Tender Offer)  ☐

CALCULATION OF REGISTRATION FEE

The Registrant hereby amends this Registration Statement on such date or dates as may be necessary to delay its effective date until the Registrant shall file a further amendment which specifically states that this Registration Statement shall thereafter become effective in accordance with Section 8(a) of the Securities Act, or until the Registration Statement shall become effective on such date as the Commission, acting pursuant to said Section 8(a), may determine.

The information in this joint proxy statement/prospectus is not complete and may be changed. We may not sell these securities until the registration statement filed with the Securities and Exchange Commission is effective. This joint proxy statement/prospectus is not an offer to sell these securities, and it is not soliciting the purchase of these securities, in any state where the offer or sale is not permitted.

PRELIMINARY JOINT PROXY STATEMENT/PROSPECTUS

DATED MAY 3, 2018, SUBJECT TO COMPLETION

PROPOSED MERGER—YOUR VOTE IS VERY IMPORTANT

To Our Shareholders:

The boards of directors of CVB Financial Corp., Citizens Business Bank and Community Bank have approved an agreement (the “merger agreement”) for the merger of Community Bank with and into Citizens Business Bank, a wholly-owned subsidiary of CVB Financial Corp. Before we can complete the merger, we must obtain the approval of the shareholders of CVB Financial Corp. and Community Bank. We are sending our respective shareholders this document to ask for approval of the principal terms of the merger agreement at the respective special shareholder meetings of CVB Financial Corp. and Community Bank, which will each be held on June 21, 2018. The merger agreement, which is attached as Annex A to the accompanying joint proxy statement/prospectus, sets forth the terms of the merger.

Based on financial results as of December 31, 2017 and including anticipated merger adjustments to occur at the time of closing, the combined company will have approximately $12.4 billion in total assets, $7.5 billion in gross loans, $9.4 billion in deposits, and $1.8 billion in equity. We believe that the shareholders of both CVB Financial Corp. and Community Bank will benefit from the combination of two complementary banking institutions with similar core values and corporate cultures that will enhance the combined company’s ability to generate profitable growth and long-term shareholder value.

In the proposed merger, Community Bank will merge with and into Citizens Business Bank in a stock and cash transaction valued at approximately $885.2 million, based on the closing price of CVB Financial Corp. common stock on the last trading day prior to our public announcement of the merger, and approximately $844.72 million, based on the closing price of CVB Financial Corp. common stock on May 3, 2018. Community Bank shareholders will receive fixed consideration consisting of 9.4595 shares of CVB Financial Corp. common stock and $56.00 per share in cash, subject to the merger consideration adjustments and other terms and conditions set forth in the merger agreement, as further described in the accompanying joint proxy statement/prospectus. The merger consideration will be reduced, on a per share basis, by the sum of the following, if any: (i) a tier 1 capital adjustment of $2.50 for every dollar of adjusted tier 1 capital of Community Bank below $365 million as of the measurement date; plus (ii) a total noninterest-bearing deposit adjustment of 45.6% of every dollar of total noninterest-bearing deposits of Community Bank below $1.1 billion as of the measurement date; plus (iii) a transaction costs adjustment of a dollar for every dollar of certain specified transaction costs of Community Bank that exceeds $6 million.

The merger agreement permits the parties to terminate the merger agreement prior to the closing of the merger under certain circumstances, including if the average closing price of CVB Financial Corp. common stock is less than $20.13 per share and such average closing price also underperforms the KBW Regional Banking Index by 15% or more, subject to CVB Financial Corp.’s right to reinstate the merger by increasing the merger consideration, all as further described in the accompanying joint proxy statement/prospectus.

Except under the limited circumstances described in the immediately preceding paragraph, the exchange ratio in the merger will not be adjusted to reflect CVB Financial Corp. stock price changes between now and the closing. Based on the closing price of CVB Financial Corp. common stock on February 26, 2018, the last trading day prior to the public announcement of the merger, and $56.00 per share in cash consideration and assuming no merger consideration adjustments, the merger consideration represented a value of $279.24 per share of Community Bank common stock. Using the closing price of CVB Financial Corp. common stock on May 3, 2018 and including $56.00 per share in cash consideration, the merger consideration represented a value of $266.47 per share of Community Bank common stock. Accordingly, the dollar value of the stock consideration that Community Bank shareholders may receive will change depending on fluctuations in the market price of CVB Financial Corp. common stock and will not be known at the time you vote on the merger. You should obtain current stock quotations for CVB Financial Corp. common stock, which is listed on the NASDAQ Global Select Market under the symbol “CVBF.”

Based on the 9.4595 exchange ratio and the number of shares of Community Bank common stock and Community Bank restricted stock units outstanding as of the date of the merger agreement, and assuming no merger consideration adjustments, CVB Financial Corp. expects that approximately 30.0 million shares of its common stock will become issuable and approximately $177.5 million in cash will be paid to Community Bank shareholders and holders of Community Bank restricted stock units as a result of the merger. Giving effect to the merger, Community Bank shareholders would hold, in aggregate, approximately 21.4% of CVB Financial Corp.’s outstanding common stock following the merger.

The merger is subject to the receipt of the required approvals by the shareholders of Community Bank and CVB Financial Corp. and all regulatory approvals, and the satisfaction or waiver of all other conditions to closing as described in the accompanying joint proxy statement/prospectus. The conditions to closing include Community Bank having a minimum amount of adjusted tier 1 capital and total non-maturity bearing deposits as of the applicable measurement date.

The accompanying joint proxy statement/prospectus contains a more complete description of the special meetings and the terms of the merger agreement and the merger. We urge you to review that entire document carefully. In particular, you should read the “Risk Factors” section beginning on page 29 of the joint proxy statement/prospectus for a discussion of the risks you should consider in evaluating the proposed merger and how they will affect you. You may also obtain information about CVB Financial Corp. from documents that CVB Financial Corp. has filed with the Securities and Exchange Commission.

The CVB Financial Corp. special meeting will be held on June 21, 2018 at Citizens University Meeting Room, 701 N. Haven Avenue, Ontario, California 91764, at 8:00 AM local time.

The Community Bank special meeting will be held on June 21, 2018 at Community Bank, 460 Sierra Madre Villa Avenue, Pasadena, California 91107, at 10:00 AM local time.

Your vote is very important. Whether or not you plan to attend your meeting, please take the time to submit your proxy in accordance with the voting instructions contained in this document. If you do not vote, abstain from voting or do not instruct your broker how to vote any shares held by you in “street name,” the effect will be a vote AGAINST the merger.

After careful consideration, the CVB Financial Corp. board of directors unanimously recommends that the shareholders of CVB Financial Corp. vote “FOR” approval of the principal terms of the merger agreement and the transactions contemplated by the merger agreement, including the merger and the issuance of CVB Financial Corp. common stock in connection with the merger, and “FOR” the grant of discretionary authority to adjourn the special meeting as necessary or appropriate.

After careful consideration, the Community Bank board of directors unanimously recommends that the shareholders of Community Bank vote “FOR” approval of the principal terms of the merger agreement and the transactions contemplated by the merger agreement, including the merger, and “FOR” the grant of discretionary authority to adjourn the special meeting as necessary or appropriate.

We enthusiastically support the merger and believe it to be in the best interests of the shareholders of both companies.

Neither the Securities and Exchange Commission nor any state securities commission has approved or disapproved of the merger, the issuance of the CVB Financial Corp. common stock in connection with the merger or the other transactions described in this joint proxy statement/prospectus, or passed upon the adequacy or accuracy of the disclosure in this document. Any representation to the contrary is a criminal offense.

The securities to be issued in connection with the merger are not savings accounts, deposits or other obligations of any bank and are not insured by the Federal Deposit Insurance Corporation or any other governmental agency.

This joint proxy statement/prospectus is dated May 7, 2018 and is first being mailed to shareholders of CVB Financial Corp. and Community Bank on or about May 9, 2018.

WHERE YOU CAN FIND ADDITIONAL INFORMATION

CVB Financial Corp. files annual, quarterly and current reports, proxy statements and other information with the Securities and Exchange Commission, or the “SEC.” You may read and copy any document CVB Financial Corp. files at the SEC’s public reference rooms in 100 F St., N.E., Washington, D.C. 20549. You may telephone the SEC at 1-800-SEC-0330 for further information on the public reference rooms. CVB Financial Corp.’s SEC filings are also available to the public at the SEC’s website at http://www.sec.gov. You may also obtain these documents, free of charge, from CVB Financial Corp. at www.cbbank.com under the “Investors” tab and then under the heading “SEC Filings.”

CVB Financial Corp. has filed a registration statement on Form S-4 of which this document forms a part. As permitted by Securities and Exchange Commission rules, this document does not contain all of the information included in the registration statement or in the exhibits or schedules to the registration statement. You may read and copy the registration statement, including any amendments, schedules and exhibits, at the address set forth below. Statements contained in this document as to the contents of any contract or other documents referred to in this document are not necessarily complete. In each case, you should refer to the copy of the applicable contract or other document filed as an exhibit to the registration statement. This document incorporates by reference documents that CVB Financial Corp. has previously filed with the Securities and Exchange Commission. They contain important information about CVB Financial Corp. and its financial condition. For more information, please see the section entitled “Incorporation of Certain Documents by Reference.” These documents are available without charge to you upon written or oral request to CVB Financial Corp.‘s proxy solicitor:

Georgeson LLC

1290 Avenue of the Americas, 9th Floor

New York, NY 10104

Toll-Free Telephone: 1-800-733-6198

If you would like to request any CVB Financial Corp. documents, your request should be sent in time to be received by CVB Financial Corp. no later than June 14, 2018 in order for you to receive the documents before the special meeting.

Community Bank does not have a class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended, or the “Exchange Act,” is not subject to the reporting requirements of Section 13(a) or 15(d) of the Exchange Act and accordingly does not file documents or reports with the SEC.

If you are Community Bank shareholder and have questions about the merger or submitting your proxy, or if you need additional copies of this joint proxy statement/prospectus or proxy cards, you should contact Community’s proxy solicitor:

Georgeson LLC

1290 Avenue of the Americas, 9th Floor

New York, NY 10104

Toll-Free Telephone: 1-800-676-0098

CVB Financial Corp. common stock is traded on the NASDAQ Global Select Market under the symbol “CVBF,” and Community Bank common stock is traded on the OTC Markets’ OTC Pink market under the symbol “CYHT.”

CVB FINANCIAL CORP.

701 N. Haven Avenue, Suite 350

Ontario, California 91764

Notice of Special Meeting of Shareholders

To Be Held June 21, 2018

To the Shareholders of CVB Financial Corp.:

Notice is hereby given that, pursuant to the terms of its bylaws and the call of its board of directors, a special meeting of shareholders of CVB Financial Corp. will be held at Citizens University Meeting Room, 701 N. Haven Avenue, Ontario, California 91764 on June 21, 2018 at 8:00 am, local time. At the special meeting, you will be asked to consider and vote upon the following matters:

1. Approval of Merger Agreement. To approve the principal terms of the Agreement and Plan of Reorganization and Merger, dated as of February 26, 2018, by and among CVB Financial Corp., Citizens Business Bank and Community Bank (the “merger agreement”) and the transactions contemplated by the merger agreement, including the merger of Community Bank with and into Citizens Business Bank (the “merger”), with Citizens Business Bank surviving the merger, and the issuance of CVB Financial Corp. common stock to the Community Bank shareholders in connection with the merger (the “CVB share issuance”), as described in the joint proxy statement/prospectus.

2. Grant of Discretionary Authority to Adjourn Meeting. To consider and vote upon a proposal to grant discretionary authority to adjourn the special meeting if necessary or appropriate in the judgment of our board of directors to solicit additional proxies or votes to approve the principal terms of the merger agreement and the transactions contemplated thereby, including the merger and the CVB share issuance.

No other business may be conducted at the special meeting.

The merger agreement, which is attached as Annex A to the accompanying joint proxy statement/prospectus, sets forth the terms of the merger. The transaction is also more fully described in the enclosed joint proxy statement/prospectus. You are urged to read these documents carefully and in their entirety. In particular, see “Risk Factors” beginning on page 29 of the accompanying joint proxy statement/prospectus.

Only shareholders of record at the close of business on May 3, 2018 will be entitled to notice of and to vote at the special meeting or at any postponement or adjournment thereof. The proposal to approve the principal terms of the merger agreement and the transactions contemplated thereby, including the merger and the CVB share issuance, requires the affirmative vote of at least a majority of the shares of CVB Financial Corp. common stock outstanding as of the record date for the special meeting. The proposal to grant discretionary authority to adjourn the special meeting, if necessary, to solicit additional proxies or votes requires the affirmative vote of at least a majority of the shares of CVB Financial Corp. common stock present in person or represented by proxy and voting at the special meeting (which affirmative vote constitutes at least a majority of the required quorum).

The CVB Financial Corp. board of directors unanimously recommends that you vote in favor of approval of the principal terms of the merger agreement and the transactions contemplated by the merger agreement, including the merger and the CVB share issuance, and the grant of discretionary authority to adjourn the special meeting, as described in the joint proxy statement/prospectus.

Whether or not you plan to attend the special meeting, please sign, date and return the enclosed proxy card in the postage prepaid envelope provided, or cast your vote by telephone or Internet by following the instructions on your proxy card, as soon as you can. The vote of every shareholder is important, and we appreciate your cooperation in returning your executed proxy promptly. If you do not vote, abstain from voting or do not instruct your broker how to vote any shares held by you in “street name,” the effect will be a vote AGAINST the merger.

Your proxy, or your telephone or Internet vote, is revocable and will not affect your right to vote in person if you attend the special meeting. If your shares are registered in your name and you attend the special meeting, you may simply revoke your previously submitted proxy by voting your shares at that time. If you receive more than one set of proxy materials because your shares are registered in different names or addresses, you will need to follow the instructions in each set of proxy materials that you receive to ensure that all your shares will be voted at the special meeting. If your shares are held by a broker or other nominee holder, and are not registered in your name, you will need additional documentation from your broker or other record holder to vote your shares in person at the special meeting. Please indicate on the proxy card whether or not you expect to attend the special meeting in person.

We appreciate your continuing support and look forward to seeing you at the special meeting.

COMMUNITY BANK

460 Sierra Madre Villa Avenue

Pasadena, California 91107

Notice of Special Meeting of Shareholders

To Be Held June 21, 2018

To the Shareholders of Community Bank:

Notice is hereby given that, pursuant to the terms of its bylaws and the call of its board of directors, a special meeting of shareholders of Community Bank will be held at Community Bank, 460 Sierra Madre Villa Avenue, Pasadena, California 91107 on June 21, 2018 at 10:00 AM, local time. At the special meeting, you will be asked to consider and vote upon the following matters:

1. Approval of Merger Agreement. To approve the principal terms of the Agreement and Plan of Reorganization and Merger, dated as of February 26, 2018, by and among CVB Financial Corp., Citizens Business Bank and Community Bank (the “merger agreement”) and the transactions contemplated by the merger agreement, including the merger of Community Bank with and into Citizens Business Bank (the “merger”), with Citizens Business Bank surviving the merger, and the cancellation of each outstanding share of Community common stock, other than any dissenting shares and excluded shares, in exchange for the right to receive 9.4595 shares of CVB common stock and $56.00 per share in cash, subject to the merger consideration adjustments and other terms in the merger agreement.

2. Grant of Discretionary Authority to Adjourn Meeting. To consider and vote upon a proposal to grant discretionary authority to adjourn the special meeting if necessary or appropriate in the judgment of our board of directors to solicit additional proxies or votes in favor of the approval of the principal terms of the merger agreement and the transactions contemplated thereby, including the merger.

No other business may be conducted at the special meeting.

The merger agreement, which is attached as Annex A to the accompanying joint proxy statement/prospectus, sets forth the terms of the merger. The transaction is also more fully described in the enclosed joint proxy statement/prospectus. You are urged to read these documents carefully and in their entirety. In particular, see “Risk Factors” beginning on page 29 of the accompanying joint proxy statement/prospectus.

Only shareholders of record at the close of business on May 3, 2018 will be entitled to notice of and to vote at the special meeting or at any postponement or adjournment thereof. The proposals to approve the principal terms of the merger agreement and the transactions contemplated thereby, including the merger, requires the affirmative vote of at least a majority of the shares of Community Bank common stock outstanding as of the record date for the special meeting. The proposal to grant discretionary authority to adjourn the special meeting, if necessary, to solicit additional proxies or votes requires the affirmative vote of at least a majority of the shares of Community Bank common stock present in person or represented by proxy and voting at the special meeting (which affirmative vote constitutes at least a majority of the required quorum).

Community shareholders will be given the opportunity to exercise dissenters’ rights in accordance with certain procedures specified in California Corporations Code Sections 1300, et. seq., which sections are attached as Annex D to the attached joint proxy statement/prospectus and incorporated herein by reference. Community shareholders who do not vote in favor of the merger may demand that Community acquire their shares of Community common stock for cash at their fair market value as of February 26, 2018, the day of, and immediately prior to, the first public announcement of the terms of the merger, excluding any appreciation or depreciation in consequence of the merger. Community shareholders dissenting must file written demands that Community acquire their shares of Community common stock for cash and comply with the other procedural requirements set forth in California Corporations Code Sections 1300, et. seq. For additional details about dissenters’ rights, please refer to “Dissenters’ Rights for Holders of Community Shares” beginning on page 108 and Annex D to the accompanying joint proxy statement/prospectus.

The Community Bank board of directors unanimously recommends that you vote in favor of approval of the principal terms of the merger agreement and the transactions contemplated by the merger agreement, including the merger, and the grant of discretionary authority to adjourn the special meeting, as described in the joint proxy statement/prospectus.

Whether or not you plan to attend the special meeting, please sign, date and return the enclosed proxy card in the postage prepaid envelope provided, or cast your vote by telephone or Internet by following the instructions on your proxy card, as soon as you can. The vote of every shareholder is important, and we appreciate your cooperation in returning your executed proxy promptly. If you do not vote, abstain from voting or do not instruct your broker how to vote any shares held by you in “street name,” the effect will be a vote AGAINST the merger.

Your proxy, or your telephone or Internet vote, is revocable and will not affect your right to vote in person if you attend the special meeting. If your shares are registered in your name and you attend the special meeting, you may simply revoke your previously submitted proxy by voting your shares at that time. If you receive more than one set of proxy materials because your shares are registered in different names or addresses, you will need to follow the instructions in each set of proxy materials that you receive to ensure that all your shares will be voted at the special meeting. If your shares are held by a broker or other nominee holder, and are not registered in your name, you will need additional documentation from your broker or other record holder to vote your shares in person at the special meeting. Please indicate on the proxy card whether or not you expect to attend the special meeting in person.

We appreciate your continuing support and look forward to seeing you at the special meeting.

TABLE OF CONTENTS

QUESTIONS AND ANSWERS ABOUT THE MERGER AND THE SPECIAL MEETINGS

The following are brief answers to certain questions that you may have about the CVB Financial Corp. special meeting, the Community Bank special meeting and the merger. We urge you to read carefully the remainder of this joint proxy statement/prospectus, including the risk factors beginning on page 29, because the information in this section does not provide all of the information that might be important to you with respect to the merger and the special meetings. Additional important information is contained in the documents incorporated by reference into this joint proxy statement/prospectus. See “Where You Can Find Additional Information” and “Incorporation of Certain Documents by Reference.”

Unless the context otherwise requires, throughout this joint proxy statement/prospectus, “CVB” refers to CVB Financial Corp., “Citizens” refers to Citizens Business Bank, “Community” refers to “Community Bank” and “we,” “us” and “our” refers collectively to CVB and Community. Additionally, we refer to the proposed merger of Community with and into Citizens as the “merger,” the Agreement and Plan of Reorganization and Merger, dated as of February 26, 2018, by and among CVB, Citizens and Community as the “merger agreement,” the issuance of the CVB common stock to the Community Bank shareholders in connection with the merger as the “CVB share issuance,” the CVB Financial Corp. special meeting of shareholders as the “CVB meeting” and the Community Bank special meeting of shareholders as the “Community meeting.”

CVB will hold a special meeting of its shareholders and Community will hold a special meeting of its shareholders for the approval of their respective proposals. This document serves as a joint proxy statement for the CVB meeting and the Community meeting and describes the proposals to be presented at each meeting.

In addition, this document is also a prospectus that is being delivered to Community shareholders because CVB is offering shares of its common stock to Community shareholders in connection with the merger.

This joint proxy statement/prospectus contains important information about the merger and the proposals being voted on at the CVB meeting and Community meeting. You should read it carefully and in its entirety. The enclosed materials allow you to have your shares voted by proxy without attending your meeting. Your vote is very important to us. We encourage you to submit your proxy as soon as possible.

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Please read the section entitled “The Merger – CVB’s Reasons for the Merger; Recommendation of the Merger by the CVB Board of Directors” for additional discussion on the reasons why the CVB board of directors unanimously approved, and unanimously recommended that CVB shareholders approve, the merger agreement and the transactions contemplated by the merger agreement, including the merger and the CVB share issuance.

In reaching its decision to approve the merger agreement and the merger, the Community board of directors considered a number of factors, including, among other things, the following:

Please read the section entitled “The Merger— Community’s Reasons for the Merger; Recommendation of the Merger by the Community Board of Directors” for additional discussion on the reasons why the Community board of directors unanimously approved, and unanimously recommended that Community shareholders approve, the merger agreement and the transactions contemplated by the merger agreement, including the merger.

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Because this is a special meeting of CVB shareholders, CVB will not transact any other business at the CVB meeting.

Under the merger agreement, (i) dissenting shares mean any shares of Community common stock that meet the requirements of dissenting shares under the California Corporations Code; and (ii) excluded shares mean any shares of Community common stock held by CVB or any direct or indirect wholly-owned subsidiary of CVB or by Community or any direct or indirect wholly-owned subsidiary of Community, other than those held in a fiduciary capacity or as a result of debts previously contracted. See “The Merger – Dissenters’ Rights for Holders of Community Shares.”

Because this is a special meeting of Community shareholders, Community will not transact any other business at the Community meeting.

The cash merger consideration will be reduced, on a per share basis, by the sum of the following, if any:

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If the sum of the foregoing adjustments exceeds $45,000,000, then 20% of the total adjustment amount in excess of $45,000,000 (which we refer to as the “excess adjustment amount”) shall be applied to reduce the aggregate cash consideration and the remaining 80% of the excess adjustment amount shall be applied to reduce the aggregate stock consideration.

As of April 30, 2018, Community’s estimated adjusted tier 1 capital was $365.3 million.

Please see “The Merger—Merger Consideration” for further discussion of the merger consideration.

The Community meeting will be held at Community Bank, 460 Sierra Madre Villa Avenue, Pasadena, California 91107, on June 21, 2018, starting at 10:00 AM, local time.

The Community board of directors has fixed the close of business on May 3, 2018, as the record date for the purpose of determining Community shareholders entitled to notice of and to vote at the Community meeting.

In addition, the Vice Chairman of the CVB board of directors has entered into a voting and support agreement with Community, pursuant to which he has agreed to vote “FOR” approval of the merger agreement and the share issuance proposal. As of the record date, the CVB Vice Chairman beneficially owned and was entitled to vote 6,897,959 shares of CVB common stock, representing approximately 6.3% of the shares of CVB common stock outstanding on that date.

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All of the directors and executive officers of Community have entered into voting and support agreements with CVB, pursuant to which they have agreed to vote “FOR” the merger proposal. As of the record date, the directors and executive officers of Community beneficially owned and were entitled to vote 1,137,796.09 shares of Community common stock, representing approximately 36.30% of the shares of Community common stock outstanding on that date.

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Community shareholders: Yes. If you are a holder of record of Community common stock, you may change your vote or revoke any proxy at any time before it is voted by (1) signing and returning a proxy card with a

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later date, (2) delivering a written revocation letter to Community’s corporate secretary at: Community Bank, 460 Sierra Madre Villa Avenue, Pasadena, California 91107, Attention: Corporate Secretary, (3) attending the Community meeting in person and voting by ballot at the meeting or (4) voting by telephone or the Internet at a later time but before the cutoff time for voting specified on your proxy card. Attendance at the Community meeting by itself will not automatically revoke your proxy. A revocation or later-dated proxy received after the vote will not affect the vote.

If you hold your shares of CVB common stock or Community common stock in “street name” through a bank or broker or other nominee, you should contact your bank or broker or other nominee to change your vote or revoke your proxy.

For a more detailed discussion of the material U.S. federal income tax consequences of the transaction, see “Material U.S. Federal Income Tax Consequences of the Merger” beginning on page 102.

The tax consequences of the merger to any particular holder of Community common stock will depend on that shareholder’s particular facts and circumstances. Accordingly, you are urged to consult your own tax advisor for a full understanding of the tax consequences of the merger to you.

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CVB is not obligated to complete the merger if dissenters’ rights are perfected and exercised with respect to 10% or more of the outstanding shares of Community common stock. Please see “The Merger Agreement—Conditions to Completion of the Merger” beginning on page 123.

If you hold your Community shares in certificated form, and do not know where your stock certificates are located, you may want to find them now so you do not experience delays receiving your merger consideration. If you are unable to locate your original Community stock certificate(s), you should contact Computershare, Community’s transfer agent, at 462 South 4th Street, Suite 1600, Louisville, Kentucky 40202; phone number (800) 962-4284.

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RISK FACTORS

In addition to the other information contained in or incorporated by reference into this joint proxy statement/prospectus, including the matters addressed under the section “Caution Regarding Forward-Looking Statements,” you should carefully consider the following risks relating to the merger before deciding how to vote at the CVB meeting or Community meeting. You should also consider the risks relating to the business of CVB because these risks will also affect the combined company. The risks relating to the business of CVB can be found in CVB’s Annual Report on Form 10-K for the year ended December 31, 2017, as amended or updated by any subsequent documents filed with the Securities and Exchange Commission, which are incorporated by reference into this joint proxy statement/prospectus. See the section entitled “Where You Can Find Additional Information” and “Incorporation of Certain Documents by Reference” on page 198.

Because the market price of CVB and Community common stock will fluctuate and the exchange ratio will not adjust for such changes, Community shareholders cannot be sure of the market value of the CVB common stock that they will receive in the merger.

Upon completion of the merger, each outstanding share of Community common stock will be converted into 9.4595 shares of CVB common stock, with cash being paid in lieu of the issuance of fractional shares, and $56.00 per share in cash. Except under limited circumstances following an election by CVB to reinstate the merger if Community elects to terminate the merger agreement as a result of the average CVB closing stock price falling below certain thresholds as further described below, the exchange ratio will not be adjusted for changes in the market price of CVB common stock or Community common stock, whether such changes in market price result from an improvement or decline in the financial condition or operating results of either company, general market and economic conditions, regulatory considerations, the timing of the merger or other factors. Changes in the price of CVB common stock prior to the merger will therefore affect the value that CVB will pay, through the issuance of CVB common stock, and that Community common shareholders will receive in the merger. For example, based on the range of closing prices of CVB common stock during the period from February 26, 2018, the last trading day before public announcement of the merger, through May 3, 2018, the exchange ratio represented a value ranging from a high of $286.24 to a low of $265.05 for each share of Community common stock (assuming no other merger consideration adjustments under the merger agreement). Neither of us is permitted to terminate the merger agreement or resolicit the vote of our respective shareholders solely because of changes in the market price of the common stock of CVB or Community, except that:

Regulatory approvals may not be received, may take longer than expected or may impose conditions that are not presently anticipated, cannot be met or may have a material adverse effect on the combined company following the merger.

Before the merger may be completed, we must obtain various approvals or consents from bank regulatory authorities, including the FDIC and the DBO. These approvals or consents require consideration by the bank regulatory authorities of various factors, including assessments of the managerial and financial resources and future prospects of the resulting institution and the competitive effect of the contemplated transactions. The Community Reinvestment Act of 1977, as amended (the “CRA”), also requires that the bank regulatory

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authorities, in deciding whether to approve the merger, assess the records of performance of Citizens and Community in meeting the credit needs of the communities they serve, including low and moderate income neighborhoods. A less than satisfactory CRA rating could delay or block the consummation of the merger.

Citizens received a composite rating of “satisfactory” at its most recent CRA performance evaluation, and Community received a composite rating of “needs to improve” at its most recent CRA performance evaluation. Since its last evaluation, both Citizens and Community have developed and implemented action plans to improve their CRA performance, including on the CRA lending, investment and service tests. Citizens and Community also believe that the merger will facilitate the enhancement of the combined company’s performance under the CRA guidelines as Citizens offers a broader range of services and products that will enhance the lending, investment and service offerings of Community’s customers particularly for low to moderate income businesses and individuals. Additionally, the combined company will gain efficiencies that will allow, among other factors, for more investment in alternative delivery channels such as mobile banking, ATMs, and call centers. Although Citizens and Community believe that the merger meets the requirements of the CRA, particularly in light of the remedial actions being taken to improve their CRA performance, there is no assurance that bank regulatory authorities will approve the merger or will approve the merger without imposing conditions on the completion of the merger or requiring changes to the terms of the merger. Such conditions or changes could have the effect of delaying completion of the merger or imposing additional costs on or limiting the growth, revenues or other aspects of the business of the combined company following the merger. In addition, as part of the review process under the CRA, it is not unusual for the bank regulatory authorities to receive protests and other adverse comments from community groups and others. Any such protests or adverse comments could prolong the period during which the merger is subject to review by the bank regulatory authorities.

There can be no assurance as to whether the regulatory approvals or consents will be received, the timing of those approvals and consents, or whether any conditions will be imposed. The merger agreement contains a condition to the obligation of each of CVB and Community to close the merger that the required regulatory approvals and consents generally do not require any action, condition or restriction that (i) would reasonably expected be likely to have a material adverse effect on CVB or (ii) require CVB, Citizens or the combined company to raise additional capital or accept any restriction on its ability to operate its businesses that would materially reduce the economic benefits of the merger to CVB and Citizens to such a degree that they would not have entered into the merger agreement had such conditions, restrictions or requirements been known as of the date of the merger agreement. Please see “The Merger— Regulatory Approvals Required for the Merger” on beginning page 105 for more information. Accordingly, if we do not receive the required regulatory approvals and consents, of if such approvals and consents contain any such materially burdensome regulatory conditions, the merger agreement may be terminated and the merger may not be completed.

We will be subject to business uncertainties and contractual restrictions while the merger is pending.

Uncertainty about the effect of the merger on employees and customers may have a material adverse effect on both CVB and Community. These uncertainties may impair our ability to attract or motivate key personnel until the merger is completed and could cause customers, vendors and others that deal with us to seek to change existing business relationships with either of us. If key employees depart because of issues relating to the uncertainty and difficulty of integration or a desire not to remain with the business, the combined company’s business following the merger could be negatively affected. In addition, the merger agreement restricts each of us from making acquisitions and taking other specified actions until the merger occurs, without the consent of the other. These restrictions may prevent each company from pursuing attractive business opportunities that may arise prior to the completion of the merger.

The merger may distract management of CVB, Citizens and Community from their other responsibilities.

The merger could cause the management of CVB, Citizens and Community to focus their time and energies on matters related to the merger that otherwise would be directed to their respective businesses and operations. Any

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such distraction on the part of management, if significant, could affect the ability of CVB, Citizens and Community to service existing business and develop new business and may adversely affect their businesses and earnings.

Combining the two companies may be more difficult, costly or time-consuming than expected.

Citizens and Community have operated and, until the completion of the merger, will continue to operate, independently. The success of the merger will depend, in part, on our ability to successfully combine the businesses of Citizens and Community upon the completion of the merger. It is possible that the integration process could result in:

The loss of key employees could adversely affect the ability of Citizens, Community and/or the combined company to successfully conduct businesses in the markets in which Citizens and Community now operate, which could have a material adverse effect on their financial results and the value of CVB common stock and Community common stock. In addition, if the combined company experiences difficulties with the integration process, the anticipated benefits of the merger may not be realized fully or at all, or may take longer to realize than expected. As with any merger of financial institutions, there also may be business disruptions that cause Citizens, Community and/or the combined company to lose customers or cause customers to remove their accounts from Citizens, Community and/or the combined company and move their business to competing financial institutions. These integration matters could have a material adverse effect on each of Citizens and Community during this transition period and for an undetermined period after consummation of the merger.

The combined company may fail to realize cost savings for the merger.

Although CVB, Citizens and Community expect to realize cost savings from the merger when fully phased in, it is possible that these potential cost savings may not be realized fully or realized at all, or may take longer to realize than expected. For example, future business developments may require the combined company to continue to operate or maintain some facilities or support functions that are currently expected to be combined or reduced. Cost savings also depend on the combined company’s ability to combine the businesses of Citizens and Community in a manner that permits those costs savings to be realized. If the combined company is not able to combine the two companies successfully, these anticipated cost savings may not be fully realized or realized at all, or may take longer to realize than expected. This in turn could reduce or otherwise adversely affect the profitability of the combined company and adversely affect its stock price.

The merger agreement may be terminated in accordance with its terms and the merger may not be completed.

The merger agreement is subject to a number of conditions which must be fulfilled in order to close. Those conditions include, but are not limited to, the receipt of CVB shareholder approval and Community shareholder approval, the receipt of all required regulatory approvals, the continued accuracy of representations and warranties by both parties and the performance by both parties of covenants and agreements, and the absence of a material adverse effect on CVB or Community since the date of the merger agreement. In addition, CVB’s obligation to close is subject to satisfaction of the following minimum financial measures by Community as of the measurement date: (i) adjusted tier 1 capital of Community shall be equal to or greater than $355.0 million, and (ii) total non-maturity deposits of Community shall be equal to or greater than $2.1 billion. See “The Merger Agreement—Conditions to Completion of the Merger” for a more complete discussion of the conditions to

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consummation of the merger. Furthermore, either CVB or Community may elect to terminate the merger agreement if the average closing price of CVB common stock is less than $20.13 per share and such average closing price also underperforms the KBW Regional Banking Index by 15% or more, subject to CVB’s right (but not obligation) to reinstate the merger by increasing the merger consideration. In addition, CVB may choose to terminate the merger agreement if Community makes a change in recommendation or materially breaches its non-solicitation covenants under the merger agreement, and Community may elect to terminate the merger agreement to enter into a definitive agreement for a superior acquisition proposal. See “The Merger Agreement—Termination” for a more complete discussion of the circumstances under which the merger agreement could be terminated. There can be no assurance that the conditions to closing the merger will be fulfilled or that the merger will be completed.

Failure to complete the merger could negatively affect the market price of CVB and Community common stock and result in other adverse consequences.

If the merger is not completed for any reason, each of CVB, Citizens and Community will be subject to a number of material risks, including the following:

For further information on the closing conditions and the termination provisions of the merger agreement, see “The Merger Agreement—Termination” on page 125 and “The Merger Agreement—Conditions to Completion of the Merger” on page 123.

The termination fee and the restrictions on solicitation contained in the merger agreement may discourage other companies from trying to acquire Community.

Until the completion of the merger, with certain exceptions, Community is prohibited from initiating, soliciting, encouraging or knowingly facilitating any inquiries with respect to an acquisition proposal, such as a merger, business combination or similar transaction, with any person or entity other than CVB. In addition, Community has agreed to pay a termination fee of $35,132,000 to CVB if it terminates the merger agreement to, among other things, enter into a definitive agreement relating to an acquisition proposal or if the other party terminates the merger agreement because, among other things, its board of directors fails to recommend the merger or makes a change in its recommendation of the merger, or fails to comply with the provisions of the merger agreement prohibiting solicitation of other acquisition proposals. These provisions could discourage other companies from trying to acquire Community even though such other companies might be willing to offer greater value to Community shareholders than offered in the merger agreement. The payment of the termination fee also could have a material adverse effect on the financial condition of Community.

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The unaudited pro forma condensed combined financial information included in this joint proxy statement/prospectus is preliminary and the actual financial condition or results of operations of the combined company after the merger may differ materially.

The unaudited pro forma condensed combined financial information in this joint proxy statement/prospectus is presented for illustrative purposes only and is not necessarily indicative of what the combined company’s actual financial condition or results of operations would have been had the merger been completed on the dates indicated. The unaudited pro forma condensed combined financial information reflects adjustments, which are based upon preliminary estimates, to record the identifiable Community assets acquired and liabilities assumed at fair value and the resulting goodwill recognized. The pro forma allocation of purchase price reflected in the selected unaudited pro forma condensed combined financial information is preliminary, subject to adjustment and may vary from the actual purchase price allocation that will be recorded at the time the merger is completed. The final allocation of the purchase price will be based upon the value of CVB common stock issuable in the merger, the merger consideration adjustments and other terms set forth in the merger agreement, and the fair value of the assets and liabilities of Community, as of the date of the completion of the merger. Accordingly, the final acquisition accounting adjustments may differ materially from the pro forma adjustments reflected in this joint proxy statement/prospectus.

Impairment of goodwill resulting from the merger may adversely affect our results of operations.

Goodwill and other intangible assets are expected to increase substantially as a result of the merger. Based on CVB’s preliminary purchase price allocation, goodwill of approximately $510.4 million and core deposits intangibles of $36.0 million are currently expected to be recorded by CVB as a result of the merger. The actual amount of goodwill and core deposits intangibles recorded may be materially different and will depend on a number of factors, including changes in the net assets acquired and changes in the fair values of the net assets acquired. See “Unaudited Pro Forma Condensed Combined Financial Statements.” Potential impairment of goodwill and amortization of other intangible assets could adversely affect each of our financial condition and results of operations. We assess our goodwill and other intangible assets and long-lived assets for impairment annually and more frequently when required by generally accepted accounting principles. We are required to record an impairment charge if circumstances indicate that the asset carrying values exceed their fair values. Our assessment of goodwill, other intangible assets, or long-lived assets could indicate that an impairment of the carrying value of such assets may have occurred or may occur in a future accounting period, in each case, that could result in a material, non-cash write-down of such assets, which could have a material adverse effect on our results of operations and future earnings.

The market price of CVB common stock after the merger may be affected by factors different from those affecting the shares of Community or CVB currently.

Upon completion of the merger, holders of Community common stock will become holders of CVB common stock. CVB’s business differs in important respects from that of Community, and, accordingly, the results of operations of the combined company and the market price of CVB common stock after the completion of the merger may be affected by factors different from those currently affecting the independent results of operations of each of CVB and Community. For a discussion of the businesses of CVB and Community and of some important factors to consider in connection with those businesses, see the information provided under “Information about the Companies – CVB Financial Corp. and Citizens Business Bank” on page 137, “Information about the Companies – Community Bank” on page 138 and documents incorporated by reference in this joint proxy statement/prospectus and referred to under “Incorporation of Certain Documents by Reference” on page 198.

Sales of substantial amounts of CVB common stock in the open market by former Community shareholders could depress CVB’s stock price.

Shares of CVB common stock that are issued to Community shareholders in the merger will be freely tradable without restrictions or further registration under the Securities Act. As of the close of business on May 3, 2018,

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CVB had approximately 110,262,742 shares of common stock outstanding. Based on the number of Community common shares and Community restricted stock units outstanding as of the date of the merger agreement, CVB currently expects to issue approximately 30 million shares of its common stock in connection with the merger. Because of the significantly enhanced liquidity of CVB common stock as compared to Community common shares on account of the greater public float and trading volume of CVB common stock relative to Community common shares, if the merger is completed, Community’s former shareholders may sell substantial amounts of CVB common stock in the public market following completion of the merger. Any such sales may cause the market price of CVB common stock to decline. These sales might also make it more difficult for CVB to sell equity or equity-related securities at a time and price that it otherwise would deem appropriate.

The shares of CVB common stock to be received by holders of Community common stock will have different rights from the shares of Community common stock.

Upon completion of the merger, Community shareholders will become CVB shareholders and their rights as shareholders will be governed by the articles of incorporation of CVB and CVB’s bylaws. The rights associated with Community common stock are different from the rights associated with CVB common stock. Please see “Comparison of Rights of Shareholders of CVB and Community” for more information.

Holders of CVB and Community common stock will have a reduced ownership and voting interest after the merger and will exercise less influence over management.

Holders of CVB common stock and Community common stock currently have the right to vote in the election of the board of directors and on other matters affecting CVB and Community, respectively. Upon the completion of the merger, each Community shareholder who receives shares of CVB common stock will become a shareholder of CVB with a percentage ownership of CVB that is smaller than the shareholder’s percentage ownership of Community. In the aggregate, CVB current shareholders and Community current shareholders are expected to own approximately 78.6% and 21.4%, respectively, of the outstanding shares of CVB common stock when the merger is completed. Because of this, Community common shareholders may have less influence on the management and policies of the combined company than they now have on the management and policies of Community and current CVB shareholders may have less influence on the combined company than they now have on the management and policies of CVB.

Community directors and executive officers have interests in the merger that are different from, or are in addition to, the interests of the shareholders Community.

Community’s executive officers and directors have interests in the merger that are different from, or in addition to, the interests of Community shareholders generally. Such interests include the following: (1) many of Community’s executive officers and directors have unvested restricted stock units that will be accelerated and vest in full on the completion of the merger; (2) Community’s executive officers are participants in plans and party to agreements that provide for severance payments and other benefits upon a qualifying termination of employment within 12 months following a change in control of Community; (3) Community’s directors and executive officers are entitled to continued indemnification and insurance coverage following the closing of the merger; and (4) upon the consummation of the merger the current Chairman of the Community board of directors will be appointed to the board of directors of CVB. These interests are described in more detail under the section entitled “The Merger—Interests of Community Directors and Executive Officers in the Merger.”

Litigation may be filed against the board of directors of CVB or Community that could prevent or delay the completion of the merger or result in the payment of damages following completion of the merger.

In connection with the merger, it is possible that CVB shareholders or Community shareholders may file putative class action lawsuits against the boards of directors of CVB or Community. Among other remedies, these shareholders could seek to enjoin the merger. The outcome of any such litigation is uncertain. If a dismissal is

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not granted or a settlement is not reached, such potential lawsuits could prevent or delay completion of the merger and result in substantial costs to CVB and Community, including any costs associated with indemnification obligations of CVB or Community. The defense or settlement of any lawsuit or claim that remains unresolved at the time the merger is consummated may adversely affect the combined company’s business, financial condition, results of operations, cash flows and market price.

The fairness opinion received by the CVB board of directors from KBW and the fairness opinion received by the Community board of directors from Davidson have not been, and are not expected to be, updated to reflect any changes in circumstances that may have occurred since the date of the opinions.

The fairness opinions of KBW and Davidson were delivered to the parties’ respective board of directors on February 26, 2018. Changes in the operations and prospects of CVB or Community, general market and economic conditions and other factors which may be beyond the control of CVB and Community may have altered the value of CVB or Community or the sale prices of shares of CVB common stock and Community common stock as of the date of this joint proxy statement/prospectus, or may alter such values and sale prices by the time the merger is completed. The opinions from KBW and Davidson, each dated February 26, 2018, do not speak as of any date other than the dates of those opinions. For a description of the opinions that CVB and Community received from their respective financial advisors, see “The Merger—Opinions of Community’s and CVB’s Financial Advisors” beginning on page 65. For a description of the other factors considered by the CVB board of directors in determining to approve the merger, see “The Merger—CVB’s Reasons for the Merger; Recommendation of the Merger by the CVB Board of Directors” beginning on page 62. For a description of the other factors considered by the Community board of directors in determining to approve the merger, see “The Merger—Community’s Reasons for the Merger; Recommendation of the Merger by the Community Board of Directors” beginning on page 59.

Implementation of the various provisions of the Dodd-Frank Act—in particular provisions that are applicable to banks and bank holding companies with $10 billion or more in assets—may delay the receipt of regulatory approvals and increase our operating costs or otherwise have a material adverse effect on our business, financial condition or results of operations after the merger.

The Dodd–Frank Wall Street Reform and Consumer Protection Act (the “Dodd-Frank Act”) enacted in 2010 significantly changes the bank regulatory structure and affects the lending, deposit, investment, trading and operating activities of financial institutions and their holding companies. The Dodd-Frank Act requires various federal agencies to adopt a broad range of new implementing rules and regulations and to prepare numerous studies and reports for Congress. The federal agencies are given significant discretion in drafting the implementing rules and regulations, and the rule-making process is still underway.

Several requirements in the Dodd-Frank Act are applicable to certain banks and bank holding companies with $10 billion or more in assets. As a result of the merger, the combined company is expected to surpass this threshold, and these provisions, subject to a phase in period, may significantly increase compliance or operating costs of the combined company or otherwise have a significant impact on the business, financial condition and results of operations of the combined company. Such provisions include the following:

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It is difficult to predict the overall compliance cost of these provisions, which will become effective (with a phase-in period) when the combined company surpasses $10 billion in consolidated assets as a result of the merger. However, compliance with these provisions will likely require additional staffing, engagement of external consultants and other operating costs that could have a material adverse effect on the future financial condition and results of operations of the combined company.

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CAUTION REGARDING FORWARD-LOOKING STATEMENTS

This joint proxy statement/prospectus contains “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995 with respect to CVB, Citizens, Community and the combined company. These statements may be made directly in this joint proxy statement/prospectus or they may be made a part of this joint proxy statement/prospectus by appearing in other documents filed with the Securities and Exchange Commission by CVB and incorporated herein by reference. These statements include statements regarding the period following completion of the merger.

Words such as “anticipate,” “estimate,” “expect,” “project,” “intend,” “plan,” “believe,” “will,” “should,” “plans,” “may,” “intend,” “projects,” “possibility,” “aims,” “target,” “objective,” “goal,” “seek” and words and terms of similar substance used in connection with any discussion of future operating or financial performance of CVB, Citizens, Community, the combined company or the merger help identify forward-looking statements. All of these forward-looking statements are CVB’s or Community’s management’s present expectations or forecasts of future events and are subject to a number of factors and uncertainties that could cause actual results to differ materially from those described in the forward-looking statements. In addition to the factors relating to the merger discussed under the caption “Risk Factors” beginning on page 29, the following risks related to the businesses of CVB, Citizens and Community, among others, could cause CVB’s, Citizens’ or Community’s actual results or those of the combined company to differ materially from those described in the forward-looking statements:

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Each of CVB, Citizens and Community caution you not to place undue reliance on the forward-looking statements, which speak only as of the date of this joint proxy statement/prospectus, in the case of forward-looking statements contained in this joint proxy statement/prospectus, or the dates of the documents incorporated by reference into this joint proxy statement/prospectus, in the case of forward-looking statements made in those incorporated documents. Neither CVB nor Community undertakes any obligation to update these forward-looking statements, except as required by law.

For additional information about factors that could cause actual results to differ materially from those described in the forward-looking statements, please see the information provided under “Information about the Companies – Community Bank” on page 138, “Information about the Companies – CVB Financial Corp. and Citizens Business Bank” on page 137 and documents incorporated by reference in this joint proxy statement/prospectus and referred to under “Where You Can Find Additional Information” and “Incorporation of Certain Documents by Reference” on page 198.

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CVB SPECIAL MEETING

Date, Time and Place of the CVB Meeting

This joint proxy statement/prospectus is being furnished to you in connection with the solicitation of proxies by the CVB board of directors in connection with the special meeting of CVB shareholders. The CVB meeting is scheduled to be held as follows:

June 21, 2018

8:00 AM Local Time

Citizens University Meeting Room

701 N. Haven Avenue

Ontario, California 91764

Purpose of the CVB Meeting

CVB shareholders of record as of May 3, 2018 will be asked to consider and vote upon the following proposals at the CVB meeting, including any postponement or adjournment thereof:

Proposal No. 1—CVB Merger Proposal

CVB is asking its shareholders to approve the principal terms of the merger agreement and the transactions contemplated by the merger agreement, including the merger and the issuance of the CVB common stock to Community shareholders in connection with the merger. Holders of CVB common stock should read this joint proxy statement/prospectus carefully and in its entirety, including the annexes, for more detailed information concerning the merger agreement and the merger. A copy of the merger agreement is attached to this joint proxy statement/prospectus as Annex A.

After careful consideration, the CVB board of directors unanimously approved the merger and the merger agreement and declared the merger agreement and the transactions contemplated thereby, including the merger and the CVB share issuance, to be advisable and in the best interests of CVB and its shareholders. See “The Merger—CVB’s Reasons for the Merger; Recommendation of the CVB Board of Directors” included elsewhere in this joint proxy statement/prospectus for a more detailed discussion of the recommendation of the CVB board of directors.

The CVB board of directors unanimously recommends that CVB shareholders vote “FOR” the CVB merger proposal.

Proposal No. 2— CVB Adjournment Proposal

The CVB meeting may be adjourned to another time or place, if necessary or appropriate, to permit, among other things, further solicitation of proxies if necessary to obtain additional votes in favor of the CVB merger proposal.

If, at the CVB meeting, the number of shares of CVB common stock present or represented and voting in favor of the CVB merger proposal and stock issuance proposal is insufficient to approve such proposal, CVB intends to move to adjourn the CVB meeting in order to solicit additional proxies for the approval of the CVB merger proposal.

In the CVB adjournment proposal, CVB is asking its shareholders to authorize the holder of any proxy solicited by the CVB board of directors on a discretionary basis to vote in favor of adjourning the CVB meeting to another time and place for the purpose of soliciting additional proxies, including the solicitation of proxies from CVB shareholders who have previously voted.

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The CVB board of directors unanimously recommends that CVB shareholders vote “FOR” the CVB adjournment proposal.

Record Date for the Special Meeting

The CVB board of directors has fixed the close of business on May 3, 2018 as the record date for determination of CVB shareholders entitled to notice of and to vote at the CVB meeting. On the record date, 110,262,742 shares of CVB common stock were outstanding and there were 1,634 holders of record.

Quorum; Votes Required

A majority of the shares of CVB common stock outstanding on the record date must be present, either in person or by proxy, to constitute a quorum at the CVB special meeting. If a quorum is present, in order to be approved, the proposals require the following votes:

At the CVB meeting, each share of CVB common stock will be entitled to one vote on all matters properly submitted to CVB shareholders.

As of the record date, CVB directors and executive officers owned and were entitled to vote approximately 7,594,554 shares of CVB common stock, representing approximately 6.9% of the outstanding shares of CVB common stock. We currently expect that CVB’s directors and executive officers will vote their shares in favor of the merger.

In addition, the Vice Chairman of the CVB board of directors has entered into a voting and support agreement with Community, pursuant to which he has agreed to vote “FOR” approval of the merger agreement and the share issuance proposal. As of the record date, the CVB Vice Chairman beneficially owned and was entitled to vote 6,897,959 shares of CVB common stock, representing approximately 6.3% of the shares of CVB common stock outstanding on that date.

Attending the Special Meeting

If you are a holder of record of CVB common stock as of the record date and plan to attend the CVB meeting, please indicate this when you vote. A photo identification will not be required for admission to the CVB meeting, but will be required if you want to vote your CVB common stock in person. If you want to vote your CVB common stock held through a bank, broker or other nominee in person, you must obtain a written proxy in your name from the bank, broker or other nominee that holds your shares.

Proxies

All shares of CVB common stock represented by properly executed proxies (including those given through voting by telephone or Internet) received before or at the CVB meeting will, unless properly revoked, be voted in accordance with the instructions indicated on those proxies. If no instructions are indicated on a properly executed proxy, the shares represented thereby will be voted:

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If you return a properly executed proxy card or voting instruction card and have indicated that you have abstained from voting, your CVB common stock represented by the proxy will be considered present at the CVB meeting or any adjournment or postponement thereof solely for purposes of determining a quorum.

If your shares are held in an account at a broker or bank or other nominee, you must instruct the broker or bank or other nominee on how to vote your shares by following the instructions provided to you by your broker or bank or other nominee. If you do not provide voting instructions to your broker or bank or other nominee, your shares will not be voted on any proposal on which your broker or bank or other nominee does not have discretionary authority to vote. Under applicable rules, your broker or bank or other nominee does not have discretionary authority to vote on the merger proposal or the adjournment proposal. Consequently, failure to provide instructions to your bank, broker or other nominee on how to vote will result in your shares not being counted as present for purposes of establishing a quorum at the meeting and not being voted on the proposals.

Because approval of the principal terms of the merger agreement and the transactions contemplated by the merger agreement, including the merger and CVB share issuance, requires the affirmative vote of a majority of the shares of CVB common stock outstanding as of the record date, abstentions, failures to vote and failure to provide instructions to your bank, broker or other nominee on how to vote will have the same effect as votes against the merger proposal, including the merger and the CVB share issuance. Accordingly, we urge you to mark each applicable box on the proxy card or voting instruction card to indicate how to vote your shares.

Because this is a special meeting, no matter or proposal other than the proposals described in this joint proxy statement/prospectus may be brought before the CVB meeting or any postponement or adjournment thereof.

If you are a CVB shareholder of record, you may revoke your proxy at any time before it is voted by:

If you hold your shares of CVB common stock through an account at a broker or bank, you should contact your broker or bank to change your vote.

Attendance at the CVB special meeting will not in and of itself constitute revocation of a proxy. If the CVB meeting is postponed or adjourned, it will not affect the ability of shareholders of record as of the record date to exercise their voting rights or to revoke any previously granted proxy using the same methods described above, except in certain circumstances that are not currently anticipated. CVB would notify shareholders by public announcement or other means if such circumstances were to occur.

Voting by Telephone or Internet

CVB shareholders of record will have the option to submit their proxy cards by telephone or Internet. Please note that there are separate arrangements for voting your shares depending on whether your shares are registered in CVB’s stock records in your name or in the name of a broker, bank or other holder of record. If you hold your shares through a broker, bank or other holder of record, you should check your proxy card or voting instruction card forwarded to you by your broker, bank or other holder of record to see which options are available.

CVB shareholders of record may submit their proxies:

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Solicitation of Proxies

The CVB board of directors is soliciting proxies for the CVB meeting. CVB will pay for the cost of solicitation of proxies. In addition to solicitation by mail, CVB’s directors, officers and employees may also solicit proxies from shareholders by telephone, facsimile, or in person. CVB will not pay any additional compensation to these directors, officers or employees for these activities but may reimburse them for reasonable out-of-pocket expenses.

If CVB management deems it advisable, the services of individuals or companies that are not regularly employed by CVB may be used in connection with the solicitation of proxies. Arrangements will also be made with brokerage houses and other custodians, nominees and fiduciaries to send the proxy materials to beneficial owners. CVB will, upon request, reimburse those brokerage houses and custodians for their reasonable expenses in so doing.

CVB has engaged Georgeson LLC to assist CVB in the solicitation of proxies. Such firm will be paid a fee of $9,500 plus associated costs and expenses.

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COMMUNITY SPECIAL MEETING

Date, Time and Place of the Community Bank Special Meeting

This joint proxy statement/prospectus is being furnished to you in connection with the solicitation of proxies by the Community board of directors in connection with the special meeting of Community shareholders. The Community meeting is scheduled to be held as follows:

June 21, 2018

10:00 AM Local Time

Community Bank

460 Sierra Madre Villa Avenue

Pasadena, California 91107

Purpose of the Community Bank Special Meeting

Community shareholders of record as of May 3, 2018 will be asked to consider and vote upon the following proposals at the Community meeting, including any postponement or adjournment thereof:

Proposal No. 1—Community Merger Proposal

Community is asking its shareholders to approve the principal terms of the merger agreement and the transactions contemplated by the merger agreement, including the merger and the cancellation of each outstanding share of Community common stock, other than any dissenting shares and excluded shares, in exchange for the right to receive 9.4595 shares of CVB common stock and $56.00 per share in cash, subject to the merger consideration adjustments and other terms in the merger agreement. Holders of Community common stock should read this joint proxy statement/prospectus carefully and in its entirety, including the annexes, for more detailed information concerning the merger agreement and the merger. A copy of the merger agreement is attached to this joint proxy statement/prospectus as Annex A.

After careful consideration, the Community board of directors unanimously approved the merger and the merger agreement and determined that the merger is fair to, and in the best interests of, Community shareholders. See “The Merger—Community’s Reasons for the Merger; Recommendation of the Merger by the Community Board of Directors” included elsewhere in this joint proxy statement/prospectus for a more detailed discussion of the recommendation of the Community board of directors.

The Community board of directors unanimously recommends that Community shareholders vote “FOR” the Community merger proposal.

Proposal No. 2— Community Adjournment Proposal

The Community meeting may be adjourned to another time or place, if necessary or appropriate, to permit, among other things, further solicitation of proxies if necessary to obtain additional votes in favor of the Community merger proposal.

If, at the Community meeting, the number of shares of Community common stock present or represented and voting in favor of the Community merger proposal is insufficient to approve such proposal, Community intends to move to adjourn the Community meeting in order to solicit additional proxies for the approval of the Community merger proposal.

In the Community adjournment proposal, Community is asking its shareholders to authorize the holder of any proxy solicited by the Community board of directors on a discretionary basis to vote in favor of adjourning the Community meeting to another time and place for the purpose of soliciting additional proxies, including the solicitation of proxies from Community shareholders who have previously voted.

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The Community board of directors unanimously recommends that Community shareholders vote “FOR” the Community adjournment proposal.

Record Date for the Special Meeting

The Community board of directors has fixed the close of business on May 3, 2018 as the record date for determination of Community shareholders entitled to notice of and to vote at the Community meeting. On the record date, 3,134,094.4 shares of Community common stock were outstanding and there were 52 holders of record.

Quorum; Votes Required

A majority of the outstanding shares of Community common stock entitled to vote on the record date must be present, either in person or by proxy, to constitute a quorum at the Community meeting. If a quorum is present, in order to be approved, the proposals require the following votes:

At the Community meeting, each share of Community common stock will be entitled to one vote on all matters properly submitted to Community shareholders.

All of the directors and executive officers of Community have entered into voting and support agreements with CVB, pursuant to which they have agreed to vote “FOR” the merger proposal. As of the record date, the Community directors and executive officers beneficially owned and were entitled to vote 1,137,796.09 shares of Community common stock, representing approximately 36.30% of the shares of Community common stock outstanding on that date.

Attending the Special Meeting

If you are a holder of record of Community common stock as of the record date and plan to attend the Community meeting, please indicate this when you vote. If you want to vote your Community common stock held through a bank, broker or other nominee in person, you must obtain a written proxy in your name from the bank, broker or other nominee that holds your shares.

Proxies

All shares of Community common stock represented by properly executed proxies (including those given through voting by telephone or Internet) received before or at the Community meeting will, unless properly revoked, be voted in accordance with the instructions indicated on those proxies. If no instructions are indicated on a properly executed proxy, the shares represented thereby will be voted:

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If you return a properly executed proxy card or voting instruction card and have indicated that you have abstained from voting, your Community common stock represented by the proxy will be considered present at the Community meeting or any adjournment or postponement thereof solely for purposes of determining a quorum.

If your shares are held in an account at a broker or bank or other nominee, you must instruct the broker or bank or other nominee on how to vote your shares by following the instructions provided to you by your broker or bank or other nominee. If you do not provide voting instructions to your broker or bank or other nominee, your shares will not be voted on any proposal on which your broker or bank or other nominee does not have discretionary authority to vote. Under applicable rules, your broker or bank or other nominee does not have discretionary authority to vote on the merger proposal or the adjournment proposal. Consequently, failure to provide instructions to your bank, broker or other nominee on how to vote will result in your shares not being counted as present for purposes of establishing a quorum at the meeting and not being voted on the proposals.

Because approval of the principal terms of the merger agreement and the transactions contemplated by the merger agreement, including the merger, requires the affirmative vote of a majority of the shares of Community common stock outstanding as of the record date, abstentions, failures to vote and failure to provide instructions to your bank, broker or other nominee on how to vote will have the same effect as votes against the merger proposal, including the merger. Accordingly, we urge you to mark each applicable box on the proxy card or voting instruction card to indicate how to vote your shares.

Because this is a special meeting, no matter or proposal other than the proposals described in this joint proxy statement/prospectus may be brought before the Community meeting or any postponement or adjournment thereof.

If you are a Community shareholder of record, you may revoke your proxy at any time before it is voted by:

If you hold your shares of Community common stock through an account at a broker or bank, you should contact your broker or bank to change your vote.

Attendance at the Community special meeting will not in and of itself constitute revocation of a proxy. If the Community meeting is postponed or adjourned, it will not affect the ability of shareholders of record as of the record date to exercise their voting rights or to revoke any previously granted proxy using the same methods described above, except in certain circumstances that are not currently anticipated. Community would notify shareholders if such circumstances were to occur.

Voting by Telephone or Internet

Community shareholders of record will have the option to submit their proxy cards by telephone or Internet. Please note that there are separate arrangements for voting your shares depending on whether your shares are registered in Community’s stock records in your name or in the name of a broker, bank or other holder of record. If you hold your shares through a broker, bank or other holder of record, you should check your proxy card or voting instruction card forwarded to you by your broker, bank or other holder of record to see which options are available.

Community shareholders of record may submit their proxies:

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Dissenters’ Rights

In connection with the merger, Community shareholders will have the opportunity to exercise dissenters’ rights in accordance with certain procedures specified in California Corporations Code Sections 1300, et. seq., which sections are attached as Annex D to this joint proxy statement/prospectus. Community shareholders who do not vote in favor of the merger may demand that Community acquire their shares of Community common stock for cash at their fair market value as of February 26, 2018, the day of, and immediately prior to, the first public announcement of the terms of the merger, excluding any appreciation or depreciation in consequence of the merger. Community shareholders dissenting must file written demands that Community acquire their shares of Community common stock for cash and comply with the other procedural requirements set forth in California Corporations Code Sections 1300, et. seq. For additional details and information on how to exercise your dissenters’ rights, please refer to “The Merger—Dissenters’ Rights for Holders of Community Shares” on page 108 and Annex D to this joint proxy statement/prospectus.

Solicitation of Proxies

The Community board of directors is soliciting proxies for the Community meeting. Community will pay for the cost of solicitation of proxies. In addition to solicitation by mail, Community’s directors, officers and employees may also solicit proxies from shareholders by telephone, facsimile, or in person. Community will not pay any additional compensation to these directors, officers or employees for these activities but may reimburse them for reasonable out-of-pocket expenses.

If Community management deems it advisable, the services of individuals or companies that are not regularly employed by Community may be used in connection with the solicitation of proxies. Arrangements will also be made with brokerage houses and other custodians, nominees and fiduciaries to send the proxy materials to beneficial owners. Community will, upon request, reimburse those brokerage houses and custodians for their reasonable expenses in so doing.

Community has engaged Georgeson LLC to assist Community in the solicitation of proxies. Such firm will be paid a fee of $8,000 plus associated costs and expenses.

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THE MERGER

This section of this joint proxy statement/prospectus describes material aspects of the proposed merger, including the merger agreement. This summary may not contain all of the information that is important to you. You should carefully read this entire document and the other documents we refer you to for a more complete understanding of the merger. In addition, we incorporate important business and financial information about CVB into this joint proxy statement/prospectus by reference. You may obtain the information incorporated by reference into this joint proxy statement/prospectus without charge by following the instructions in the section entitled “Where You Can Find Additional Information.”

General

CVB, Citizens and Community have entered into the merger agreement, pursuant to which Community will merge with and into Citizens, the separate existence of Community will cease and Citizens will continue as the surviving corporation immediately upon the closing of the merger. The terms of the merger is set forth in the merger agreement, a copy of which is attached to this joint proxy statement/prospectus as Annex A.

Merger Consideration

In the merger, each outstanding share of Community common stock will be converted into the right to receive 9.4595 shares of CVB common stock, with cash paid in lieu of fractional shares, and $56.00 per share in cash, subject to certain merger consideration adjustments set forth in the merger agreement. At the effective time of the merger, each Community restricted stock unit will automatically accelerate in full and be converted into the right to receive the merger consideration.

The exchange ratio in the merger will not be adjusted to reflect CVB common stock price changes between now and the closing, unless CVB exercises its right (but not the obligation) to reinstate the merger by increasing the merger consideration following a termination of the merger agreement by Community as a result of the average closing price of CVB common stock being less than $20.13 per share and also underperforming the KBW Regional Banking Index by 15% or more. See “The Merger Agreement – Termination” for more information.

The cash consideration is subject to reduction, on a per share basis, by the sum of the following, if any:

If the sum of the foregoing adjustments exceeds $45,000,000, then 20% of the total adjustment amount in excess of $45,000,000 (which we refer to as the “excess adjustment amount”) shall be applied to reduce the aggregate cash consideration and the remaining 80% of the excess adjustment amount shall be applied to reduce the aggregate stock consideration.

As of April 30, 2018, Community’s estimated adjusted tier 1 capital was $365.3 million.

Based on the closing price of CVB common stock on February 26, 2018, the last trading day prior to the public announcement of the merger, and $56.00 per share in cash consideration and assuming no merger consideration adjustments, the merger consideration represented a value of $279.24 per share of Community common stock. Using the closing price of CVB common stock on May 3, 2018 and including $56.00 per share in cash consideration, the merger consideration represented a value of $266.47 per share of Community common stock. Accordingly, the dollar value of the stock consideration that Community shareholders may receive will change

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depending on fluctuations in the market price of CVB common stock and will not be known at the time you vote on the merger. You should obtain current stock quotations for CVB common stock, which is listed on the NASDAQ Global Select Market under the symbol “CVBF.”

Based on the 9.4595 exchange ratio and the number of shares of Community common stock and Community restricted stock units outstanding as of the date of the merger agreement, and assuming no merger consideration adjustments, CVB expects that approximately 30.0 million shares of its common stock will become issuable and approximately $177.5 million in cash will be paid to Community shareholders and holders of such restricted stock units as a result of the merger. Giving effect to the merger, Community shareholders would hold, in aggregate, approximately 21.4% of CVB’s outstanding common stock following the merger.

At the effective time of the merger, (i) any Community common stock held by CVB or any direct or indirect wholly-owned subsidiary of CVB or by Community or any direct or indirect wholly owned subsidiary of Community, other than those held in a fiduciary capacity or as a result of debts previously contracted, which are referred to as excluded shares, and (ii) any dissenting shares (subject to the procedures for dissenting shares described herein) will automatically be cancelled and retired and will cease to exist and no consideration will be issued in exchange therefor.

Background of the Merger

Each of the CVB and Community board of directors and management regularly review their respective business strategies, opportunities and challenges as part of their consideration and evaluation of their respective long-term prospects, with the goal of enhancing value for their respective shareholders.

Over the last several years, the Community board of directors and executive management have reviewed and assessed various strategic opportunities potentially available to Community. These discussions have focused on, among other things, options for Community with the goal of enhancing value for all Community shareholders. As part of this ongoing process, the Community board of directors and management have reviewed a stand-alone strategy, the costs and benefits associated with becoming a public company, the business and regulatory environment facing financial institutions generally and Community in particular, as well as conditions and ongoing consolidation in the financial services industry, including the challenges posed to banks of Community’s size operating principally in Southern California. Furthermore, Community has on occasion been approached by various banks to discuss the potential of combining organizations and Community has approached other entities about acquiring them.

On July 21, 2015, the investment banking firm D.A. Davidson & Co. (“Davidson”) was invited to present and discuss various strategic alternatives with the Community Strategy Committee (comprised of Messrs. McCluer, Cook, Laitsch, McEachern and Misch), including benefits and challenges with pursuing organic growth, an acquisition strategy, merger transactions, an initial public offering (IPO), or an outright strategic sale of Community. Following the presentation, the Strategy Committee authorized Community management to enter into an agreement with Davidson to provide financial advisory and investment banking services.

On August 25, 2015, Community entered into an agreement with Davidson to render services to Community in connection with its review of various financial and strategic alternatives, including capital raising transactions, acquisitions by Community of other financial institutions and strategic combinations with potential merger partners.

On September 22, 2015, representatives of Davidson presented various strategic alternatives to the Strategy Committee of Community, including a review of potential acquisition candidates as well as potential strategic partners. Davidson also discussed with the Strategy Committee various capital planning scenarios. On October 21, 2015, the Strategy Committee (comprised of Messrs. McCluer, Cook, Laitsch and Misch) further discussed with representatives of Davidson various capital-raising alternatives. In addition, Mr. Misch updated

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the Strategy Committee on initial meetings he had with the Chief Executive Officer of Party A, a bank holding company, to discuss a potential strategic merger, the Chief Executive Officer of another bank (Party B) to discuss a potential merger and other similar possibilities.

Subsequent to the October Strategy Committee meeting, Community signed a confidentiality agreement with Party A on November 4, 2015 and with Party B on October 28, 2015 to allow further discussions to take place. Mr. Misch and certain members of the Bank’s Strategy Committee met with the CEO of Party B and certain other representatives of Party B on November 26, 2015. Further, Mr. Misch and certain members of the Bank’s Strategy Committee subsequently held a meeting with the Chief Executive Officer of Party A on December 15, 2015.

On November 18, 2015, Davidson made a presentation to the Community Strategy Committee, at which all the members of the Community board of directors were present as well as a member of Manatt, Phelps & Phillips, LLP, Community’s counsel (“Manatt”), exploring an IPO as well as three different merger and acquisition scenarios, with three potential merger partners Party A, Party B and Party C, a bank holding company, two of which were public companies and one of which was a private company. Davidson prepared for the committee, among other things, a net present value analysis for an IPO scenario vs. a merger and acquisition (M&A) scenario. In the course of their presentation, Davidson reviewed with the committee the benefits and detriments associated with each scenario, including the valuation of Community, potential liquidity for Community shareholders and the market environment for either an IPO or a strategic merger. Following the presentation, and contributions from Mr. Misch and members of the Community Strategy Committee regarding the meetings and feedback from Party A and Party B as well as a review of materials relating to a transaction with Party A and Party B, the Community Strategy Committee determined on November 18, 2015 to recommend to the full Community board of directors that Community should pursue an IPO. In addition, the Strategy Committee agreed that Mr. Misch should continue his dialogue with Party A but that no further conversations with Party B should be held and that Community should not pursue a transaction with Party C. At a regularly scheduled meeting of the Community Board on November 19, 2015, the Community board of directors agreed with the Strategy Committee’s recommendation to pursue an IPO.

Between November 20, 2015 and May, 2016, Community continued to prepare for an IPO, while also reviewing potential acquisition targets. In addition, one additional discussion was held between Mr. Misch and the CEO of Party A in late 2015, but by February, 2016, the Bank had put ongoing strategic transactions on hold. During this same timeframe, Davidson participated in regular meetings with the Bank’s Strategy Committee (comprised of Messrs. McCluer, Cook, Knight, Laitsch and Misch), including a meeting on May 25, 2016 (where the entire Community board of directors was present) where Davidson updated the Strategy Committee on the M&A environment, reviewed various strategic alternatives and various considerations associated with each option, including continuing a standalone strategy, continued pursuit of an IPO or entering into a larger strategic merger or acquisition. Davidson also analyzed the effects of each of the foregoing transactions on Community’s liquidity, valuation and independence as well as the risks and rewards associated with each option. In addition, Davidson reviewed with the Community board of directors potential smaller acquisition targets for Community.

On May 9, 2016, Mr. Misch had an informal meeting with the Executive Vice President and Chief Financial Officer of Party C to discuss their respective businesses and preliminarily explore a potential business combination.

On June 2, 2016, Community formally terminated the August 25, 2015 letter agreement with Davidson.

On June 23, 2016, the Community board of directors decided to put the IPO and certain other strategic alternatives on hold so that Community could continue to focus on addressing internal issues, including attention to its operational efficiencies and processes, and organic growth strategy.

On February 3, 2017, a special meeting of the Community board of directors was held. At this meeting, the Community board of directors granted management authority to move forward again with an IPO.

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At the April 26, 2017 meeting of the Strategy Committee (comprised of directors Knight, Browning, Cook, Denmark, Laitsch and McCluer) at which all directors were present, the Strategy Committee reviewed past historical strategic alternatives and future strategic alternatives Community could consider.

At the April 27, 2017 meeting of the Community board of directors, at which a representative of Manatt was present, the Community board of directors, after discussing market timing, industry conditions and opportunity, authorized Community and Davidson to initiate discussions with Party C to determine if there would be interest in exploring a strategic merger transaction with Community. On April 30, 2017, Community and Party C entered into a mutual confidentiality agreement allowing for the sharing of confidential information between the parties in order to aid in the exploration of a strategic transaction.

A special telephonic meeting of the Community board of directors was held on May 1, 2017, at which a representative from Davidson was present, for the purpose of updating the Community board of directors on status with Party C and a review of a transaction process with Party C. At this meeting, the Community board of directors discussed with Davidson other potential options with a merger partner from within or outside of California.

On May 5, 2017, Mr. Misch and a representative from Davidson met with the chairman of the board of directors and Chief Financial Officer of Party C to discuss a strategic transaction.

At a special meeting of the Community board of directors held on May 16, 2017, a representative of Manatt reviewed with the Community board of directors its fiduciary duties in the context of a strategic transaction. In addition, Mr. Misch updated the Community board of directors on the meeting with representatives from Party C.

At a special meeting of the Community board of directors held on May 24, 2017, a representative from Davidson provided the Community board of directors with additional information regarding Party C including current strategic efforts that party was undertaking and a communication from their Chairman that they would be open to additional discussions in approximately 60 days. The representative from Davidson also provided the Community board of directors with further information regarding market conditions for a strategic transaction.

Subsequent to May 24, 2017, Party C informed Community that they wanted to see Community’s further results of operations and focus on their own internal strategy rather than submitting an offer at that time. Community accordingly opted to cease discussions with Party C. On June 21, 2017, a meeting of the Strategy Committee (comprised of Messrs. Knight, Cook, Denmark, Laitsch and McCluer) was held at which all directors were present. A representative from Davidson reviewed various strategic options with the Strategy Committee, including processes, investment highlights and potential issues in considering a strategic transaction at this time. At the regularly scheduled board meeting held on June 22, 2017, the Community board of directors outlined a roadmap for delaying any potential strategic transaction or capital raise (including the IPO) and instead focus its efforts on other internal initiatives. In addition, on June 22, 2017, Community entered into a new engagement agreement with Davidson in connection with Community’s ongoing review of financial and strategic alternatives.

Between June 2017 and October 2017, Community continued to focus on its internal processes, organic growth and the improvement of procedures to effectively address its most recent regulatory exam, as well as a timeline for implementing a revised strategic plan

From time to time over the last seven years, CVB had reached out to Community to gauge Community’s interest in exploring a potential strategic transaction between CVB and Community. On July 24, 2017, at Mr. Myers’ invitation, Mr. Laitsch met with Mr. Myers. At the meeting, Mr. Myers again conveyed to Mr. Laitsch CVB’s interest in exploring a potential strategic transaction with Community.

On August 21, 2017, the CVB board of directors and management conducted their annual strategic planning session. As had been done in prior planning sessions, at the 2017 annual strategic planning session, CVB invited

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representatives from an investment advisory firm to provide the CVB directors and management with an update on the business, regulatory and competitive environment, and the merger and acquisition landscape, for financial institutions. At the strategy planning session, the CVB board of directors and management also discussed the possibilities and challenges of acquiring a bank, such as Community, that is significantly larger than CVB’s prior acquisitions, including, among other things, the resources needed to gear up for such a transaction, the risks and considerations in pursuing such an acquisition and the need to prepare for further regulatory oversight under the Dodd-Frank Act if the acquisition results in the combined entity crossing the $10 billion asset threshold. After the strategic planning session, in early September, Mr. Myers called Mr. Laitsch to follow up on their July 24^th meeting to request a meeting to discuss a possible transaction between CVB and Community. Mr. Laitsch indicated to Mr. Myers that it was not an appropriate time for CVB to meet with Community to discuss a strategic transaction.

On October 11, 2017, Mr. Myers met with a representative of Davidson to discuss a wide range of subjects, including conditions in the banking marketplace, potential CVB merger targets and the competitive landscape. At this meeting, Mr. Myers expressed CVB’s strong interest in acquiring Community and that CVB would like to be a part of any process should Community decide to engage in a strategic transaction. The representative from Davidson indicated to Mr. Myers that the Community board of directors was considering various strategic alternatives and that he would convey to Mr. Misch and the Community board of directors CVB’s interest in being part of any such process.

On October 24, 2017, a special meeting of the Community board of directors was held to review and evaluate various strategic alternatives. Davidson updated the Community board of directors on a variety of financial and strategic matters, including market data for recent mergers and acquisitions and the prospects of successfully entering into and consummating a strategic transaction. At that same meeting, Davidson presented the Community board of directors with certain financial and other data relative to a strategic combination with five (5) potential merger partners, including Party B, Party C, Party D, Party E and CVB and the reasons why such parties were well-suited to successfully consummate a transaction with Community. In addition, Davidson reviewed the profile of Community and its attractiveness as a candidate in an acquisition and the ability of each of the potential merger partners to enter into an agreement with Community without any financing contingencies. The Community board of directors engaged in an active discussion with Davidson and determined to further review the analysis and follow-up at the regularly scheduled Board meeting on October 26, 2017.

On October 26, 2017, at a regular board meeting, the Community board of directors reviewed and considered, including market conditions, the regulatory environment, capital and regulatory position, the current economic landscape, Community’s current business position, the interests of all of Community shareholders and the materials presented by Davidson at the October 24, 2017 meeting. The Community board of directors then authorized Community to move forward with a strategic transaction with another party and authorized Davidson to contact each of the five parties identified on October 24, 2017 to solicit their interest in making a proposal to merge with Community.

Between October 27, 2017 and November 7, 2017, Community entered into a mutual confidentiality agreement with each of the foregoing parties other than Party C who had previously entered into a mutual confidentiality agreement with Community in April 2017. During this time, Community also populated a data room in connection with each party’s due diligence review of Community and Davidson distributed an executive memorandum to each of the parties which summarized the merger opportunity.

On or about October 27, 2017, CVB engaged KBW to render financial advisory services to CVB in connection with a potential acquisition by CVB of Community.

On November 7, 2017, Davidson sent out a request for proposal guidelines to each of the five parties that had signed a mutual confidentiality agreement providing a deadline for on or before November 17, 2017 to receive a letter of intent setting forth, among other items, the proposed purchase price, the form of consideration, the plans

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for the combined enterprise, timeline to complete a transaction and any conditions and approvals required to complete a strategic transaction.

Between October 31, 2017 and November 15, 2017, Mr. Misch, a representative of Davidson and either Mr. Laitsch or Mr. Knight conducted in-person meetings with representatives from each of the five parties to discuss Community, plans for a combined franchise and the benefits of a strategic transaction with each such party. In addition, at each of the meetings, Mr. Misch, Davidson and either of Mr. Laitsch or Mr. Knight were able to learn additional information about each of the interested franchises.

On November 15, 2017, the CVB and Citizens board of directors held a joint special meeting to consider whether CVB should submit a bid to acquire Community and, if so, the terms to be offered by CVB in a nonbinding letter of intent in the form requested by Community. Mr. Myers provided an overview of the proposed terms of the offer, the strategic considerations in determining whether to proceed with submitting an offer and the significant logistical and integration issues that would be presented by such a transaction. Mr. Myers emphasized that an acquisition of Community would be a substantial transaction for CVB and Citizens, particularly given Community’s asset size, total shareholder’s equity, and physical locations throughout Southern California. In this regard, Mr. Myers noted that many of the Community branches are located nearby existing Citizens branches, which would provide for potential synergies and cost-saving opportunities by consolidating nearby branches following the acquisition. KBW then discussed the business and financial considerations relevant to the proposed acquisition with the CVB and Citizens board of directors and management. KBW discussed matters affecting the banking industry in general and Citizens and Community in particular, including the interest rate outlook, deposit values, the impact of recent and potential regulatory and tax changes, asset quality concerns, enhancement and detractors to operational efficiencies, and a review of potential competitors for the Community acquisition as well as other target bank consolidation opportunities and valuations. The CVB and Citizens board of directors then engaged in extensive discussion with KBW and management regarding, among other things, the strategic rationales for any such acquisition, the ranges of key financial and business terms that would be feasible for CVB to offer, the key potential risks and benefits of any acquisition transaction, and Citizens’ ability to absorb and administer the acquisition of a bank of the size and scale of Community. At the conclusion of the meeting, the CVB and Citizens board of directors unanimously approved the submission by CVB of a nonbinding letter of intent to acquire Community on the terms and conditions discussed by the CVB and Citizens board of directors and management.

On November 16 and 17, 2017, CVB’s management met telephonically with KBW and CVB’s legal counsel, Morrison & Foerster LLP (“M&F”), to finalize the terms of the nonbinding letter of intent for submission to Community.

By November 17, 2017, all five parties had submitted nonbinding letters of intent to acquire Community. On November 21, 2017, at a special telephonic meeting of the Community board of directors, the Community board of directors preliminarily reviewed with representatives of Davidson and a representative of Manatt each of the letters of intent, as well as the anticipated time frame for closing a transaction from material previously distributed to the Community board of directors. The Community board of directors also discussed with Davidson and the representative from Manatt regulatory approval issues and execution risk associated with each of the five prospective merger partners. The representative from Manatt also reviewed with the Community board of directors the importance of confidentiality through the sale process. In addition, Director Cook reported on an unsolicited indication he received from an investment manager regarding a potential foreign-based party interested in acquiring a US based-bank. The Community board of directors asked Davidson to contact the foreign-based party to learn more.

On November 28, 2017, the Community board of directors met with representatives of Davidson and a representative of Manatt. Manatt led the Community board of directors through an extensive review of its fiduciary duties in the context of pursuing a strategic transaction. Davidson then led the Community board of directors through a comprehensive review and comparison of each of the letters of intent, including the merger

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consideration, consideration mix, pro forma ownership percentages in a combined franchise, valuation multiples, plans for branch consolidation, closing conditions, potential for board representation in a combined franchise, dividend history of each of the proposed acquirers, information regarding the acquirer’s stock currency, financing contingencies, exclusivity provisions, regulatory considerations (including crossing the $10 billion threshold and Community Reinvestment Act issues), recent M&A comparable transactions and timing for completing a transaction. The merger consideration offered by Party B, Party C, Party D and Party E, and based on stock prices as of November 24, 2017, ranged from $553 million on the low end to $785 million on the high end, with all parties offering primarily stock consideration except for one party (Party B) which offered exclusively cash consideration. CVB’s initial letter of intent provided for aggregate merger consideration of $899 million based on CVB’s stock price as of November 24, 2017, with approximately 20% of the consideration in the form of cash and the remainder in CVB common stock based on a fixed exchange ratio. The Community board of directors also reviewed with Davidson materials Davidson had prepared regarding each potential acquirer. The Community board of directors actively discussed the letters of intent and each of the potential merger partners, including the substantial difference in merger consideration being offered by CVB as well as the merger consideration sensitivity to movement in CVB’s stock price relative to the other offers. Davidson noted that all of the offers were subject to further due diligence. In addition, Davidson reported on its communication regarding the potential foreign-based party who was interested in acquiring a US based-bank as introduced by Director Cook. Davidson reported that such party had not yet engaged legal counsel to explore the requirements of acquiring a US-based bank nor had such party had any meetings with the bank regulatory authorities to review the regulatory requirements associated with a bank acquisition. The Community board of directors reviewed the significant execution risk associated with continuing to engage with such party.

At the November 28, 2017 meeting, the Community board of directors also reviewed various forecasts in either pursuing a potential merger or remaining independent, including various valuation scenarios for Community if it remained independent. The Community board of directors then instructed Davidson to continue to negotiate with CVB’s financial advisor, KBW, on revising their proposed letter of intent to address enhanced board representation, an aggregate price increase of approximately $21 million, removal of proposed lock-up agreements for Community shareholders post-merger, the inclusion of a walk-away right in the event CVB’s stock price were to fall below certain thresholds relative to a regional banking index, modification of when a break-up fee would be paid, removal of financial conditions to closing and a revised period of exclusivity. In addition, the Community board of directors authorized the Strategy Committee to handle next steps with CVB following execution of a letter of intent. To that end the Strategy Committee was affirmed as Directors Cook, Denmark, McCluer, Knight and Laitsch. In addition, Ms. Stovesand was appointed to the Strategy Committee.

On November 29, 2017, the CVB and Citizens board of directors met telephonically with representatives of KBW and M&F to consider whether CVB should submit a revised nonbinding letter of intent to acquire Community in response to the requested changes from Community received by KBW through Davidson on November 28, 2017. The CVB and Citizens board of directors and management, together with representatives of KBW and M&F, reviewed and analyzed the changes to the nonbinding letter of intent requested by Community. CVB management emphasized the unique strategic opportunities presented by the proposed acquisition of Community and reiterated the potential benefits if the acquisition of Community is consummated, while acknowledging that the higher valuation requested by Community would increase the financial risk and extend the earn-back period for CVB. KBW then presented updated business and financial considerations in light of the proposed revised terms. The CVB and Citizens board of directors then engaged in extensive discussions with CVB management and KBW on the proposed revisions to the CVB nonbinding letter of intent. At the conclusion of the meeting, the CVB and Citizens board of directors unanimously authorized management to offer an increased aggregate consideration of $925 million to acquire Community together with other revisions to the CVB nonbinding letter of intent as decided by CVB management.

On November 29, 2017, the Community board of directors met telephonically with representatives of Davidson and a representative of Manatt to review the revised letter of intent provided by CVB. The revised letter of intent included the requested price increase, an added walk-away right for the benefit of both Community and CVB,

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representation of two directors on CVB’s board of directors, a break-up fee equal to 4% of the aggregate merger consideration only in connection with Community’s exercise of its fiduciary rights to pursue a superior proposal, elimination of the requirement for lock-up agreements from Community shareholders post-merger, and revised exclusivity terms until December 29, 2017 which would be automatically extended to January 29, 2018 if a draft definitive agreement was delivered prior to December 29, 2017. Based on the foregoing changes to the letter of intent, the Community board of directors authorized execution of the letter of intent by Community subject to satisfactory resolution of certain financial conditions to closing relating to deposits and loans.

Following further modification by CVB of financial conditions to closing, Community and CVB executed a final letter of intent on November 30, 2017.

On December 6, 2017, an in-person diligence meeting was held with representatives of Community, Davidson, CVB and KBW. On December 11, 2017, Davidson forwarded a reverse due diligence request to KBW reflecting the input from Community and Manatt, regarding information Community wanted to review on CVB.

On December 13, 2017, various due diligence discussions were held between Mr. Misch, other executives of Community and an executive team from CVB.

On December 14, 2017, the Community board of directors held a regularly scheduled board meeting. Representatives from Davidson reviewed the current status of the diligence process, the market performance of CVB’s stock, and provided further illustrations to the Community board of directors regarding the operation of the walk-away right in the event CVB’s stock price declines below a certain threshold and CVB’s stock price underperforms the KBW Regional Bank Index by more than 15%. A representative from Manatt reviewed with the Community board of directors anticipated provisions which would be set forth in a definitive agreement and regulatory issues associated with a transaction. Mr. Misch also reviewed with the Community board of directors his and Community’s management team positive meetings with CVB and their executive personnel.

Between December 16 and December 19, 2017, CVB conducted additional on-site due diligence meetings that included interviews with various members of Community’s management as well as an extensive loan file review.

On December 20, 2017, at an executive session of the meeting of the CVB and Citizens board of directors, the CVB and Citizens board of directors received an update from CVB management on the status of CVB’s proposed acquisition of Community. CVB management provided an update on the current progress of CVB’s due diligence efforts, including the results of CVB’s initial review of certain credit and regulatory matters. CVB’s management stated that it continued to support the proposed transaction for the reasons previously discussed with the CVB and Citizens board of directors, although further negotiations with Community could ensue over issues that have surfaced to date in the due diligence review,

On December 28, 2017, at a special telephonic meeting of the CVB board of directors, CVB management provided an update on due diligence matters, identified areas that still need to be examined and noted that M&F was in the process of finalizing initial drafts of key transaction documents for distribution to Community later that same day. On December 28, 2017, M&F delivered the initial draft of the merger agreement to Davidson and Manatt, together with various forms of voting and non-competition/non-solicitation ancillary agreements for execution by the directors and certain officers of Community.

On January 5, 2018, a special telephonic meeting of the Strategy Committee was held at which all of the directors of Community were also in attendance. Representatives from Davidson provided an update on the overall transaction value based on CVB’s stock price as well as comparative information relative to other bids from the initial November, 2017 letter of intent process. Mr. Misch and a representative from Davidson provided an overview of the state of the transaction with CVB, the current status of due diligence and requests for reverse due diligence materials, as well as the recently completed loan review on Community. A representative of Manatt then engaged in a comprehensive review with the directors of the merger agreement and the various ancillary

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agreements (copies of which had been previously provided to the directors), including key issue points for negotiation and discussion, overall structure of the merger agreement, representations, warranties and covenants provided by each party, conditions to closing and termination rights. Manatt also reviewed provisions relating to the various ancillary agreements. In addition, Manatt discussed the overall process between signing and closing a transaction, including delivery of a fairness opinion from Davidson. The directors actively discussed the various transaction agreements and proposed changes.

On January 9, 2018, a special meeting of the Strategy Committee was held. Mr. Misch reviewed with the members the status of the transaction with CVB as well as his impressions about the plan for the combined franchise, including retention of Community employees. The members of the committee reviewed potential execution risks and the risks associated with successfully completing a merger, including retention of key employees in a combined franchise.

On January 22, 2018, representatives from Community, Davidson and Mr. Laitsch held an in-person reverse due diligence meeting with CVB to review among other items, risks management associated with CVB’s business, impact of crossing the $10 billion threshold, succession planning, regulatory challenges associated with a combination and of the local communities. In addition, during January 2018, representatives from Community and Davidson reviewed certain reverse due diligence materials provided by CVB to Community in a data room.

On January 24, 2018, a meeting of the Strategy Committee was held at which all the directors were present together with representatives from Davidson and a representative of Manatt. Mr. Misch reviewed the results of Community’s reverse due diligence meeting on January 22, 2018, including his overall positive impressions about CVB’s business and organization as well as their approach to a combined organization, including products and business lines. Mr. Laitsch also reported to the directors his positive impressions about CVB which emerged from the reverse due diligence meeting. Mr. Misch reviewed CVB’s plans to address the $10 billion asset threshold once they cross it following consolidation and the preparation CVB has already made in anticipation of reaching that asset size. Mr. Misch also discussed issues around compliance with the Community Reinvestment Act in light of Community’s CRA rating and CVB’s CRA rating. A representative from Davidson reviewed with the Community board of directors materials previously provided including the financial benefits of the combined institution, CVB’s dividend payment history and dividend payout ratio post-merger as well as their business strategy and capital planning. The Community board of directors actively reviewed with the representatives from Davidson and Manatt anticipated areas of concern that may be set forth in the revised definitive agreement. Furthermore, Mr. Misch discussed with the Community board of directors employee retention between signing and closing as well as the need to identify and recommend up to two candidates to serve on the Community board of directors of the combined institution.

On January 24, 2018, at an executive session of the meeting of the CVB and Citizens board of directors, CVB management and KBW provided an update on the status of CVB’s proposed acquisition of Community. Mr. Myers began by summarizing the current status of due diligence review and issues that have arisen from the review that could potentially make customer and employee retention more challenging in the event of a merger of Community and Citizens. Mr. Myers also reviewed Community’s CRA ratings and other regulatory matters impacting Community. Although Mr. Myers concluded that the combined bank could probably address these negative issues over time, he believed that these negative issues warranted going back to Community to seek a reduction in the previously proposed purchase price. Representatives from KBW then summarized Community’s recently completed reverse due diligence review of CVB. KBW and Mr. Myers also provided an update on the potential selection of one or two Community directors to serve on the CVB and Citizens board of directors upon the consummation of the merger, as well as a potential joint meeting among the chief executive officers of CVB and Community with the bank regulators if the proposed transaction continued to proceed as expected. KBW discussed financial and market metrics for CVB’s consideration in determining the merits of the proposed acquisition. The CVB directors, management and KBW then debated the specific terms of a potential revised offer by CVB to acquire Community in light of the results of CVB’s due diligence review, as well as recent changes to CVB’s volume weighted average stock price and its impact on the exchange ratio and number of CVB common shares to be issued as part of the

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