Exhibit 99.1

Press Release

For Immediate Release

CVB Financial Corp. Reports Earnings for the First Quarter 2024

First Quarter 2024

Ontario, CA, April 24, 2024-CVB Financial Corp. (NASDAQ:CVBF) and its subsidiary, Citizens Business Bank (the “Company”), announced earnings for the quarter ended March 31, 2024.

CVB Financial Corp. reported net income of $48.6 million for the quarter ended March 31, 2024, compared with $48.5 million for the fourth quarter of 2023 and $59.3 million for the first quarter of 2023. Diluted earnings per share were $0.35 for the first quarter, compared to $0.35 for the prior quarter and $0.42 for the same period last year. Net income of $48.6 million for the first quarter of 2024 produced an annualized return on average equity (“ROAE”) of 9.31%, an annualized return on average tangible common equity (“ROATCE”) of 15.13%, and an annualized return on average assets (“ROAA”) of 1.21%.

David Brager, President and Chief Executive Officer of Citizens Business Bank, commented, “Citizens Business Bank continues to perform consistently in a challenging operating environment. Our solid financial performance is highlighted by our 188 consecutive quarters of profitability and 138 consecutive quarters of paying cash dividends. We remain focused on our mission of banking the best small to medium sized businesses and their owners, through all economic cycles. I would like to thank our customers and associates for their commitment and loyalty.”

Highlights for the First Quarter of 2024

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INCOME STATEMENT HIGHLIGHTS

Net Interest Income

Net interest income was $112.5 million for the first quarter of 2024. This represented a $6.9 million, or 5.78%, decline from the fourth quarter of 2023, and a $13.3 million, or 10.55%, decrease from the first quarter of 2023. The quarter-over-quarter decrease in net interest income was primarily due to a 16 basis point decline in net interest margin reflecting approximately $6 million in higher interest expense associated with time deposits and borrowings. The decline in net interest income compared to the first quarter of 2023 was due to a 35 basis point decrease in net interest margin and a $158.5 million decline in average earning assets. Interest expense from borrowings increased by approximately $12 million compared to the first quarter of 2023, as average borrowings grew by $1.02 billion.

Net Interest Margin

Our tax equivalent net interest margin was 3.10% for the first quarter of 2024, compared to 3.26% for the fourth quarter of 2023 and 3.45% for the first quarter of 2023. The 16 basis point decrease in our net interest margin compared to the fourth quarter of 2023, was the result of a 22 basis point increase in our cost of funds, offset by a four basis point increase in our interest-earning asset yield. The four basis point increase in our interest-earning asset yield was primarily due to a 12 basis point increase in loan yields. Cost of funds increased in the first quarter, as cost of deposits and customer repurchase agreements increased by 12 basis points to 0.73%, including the impact of a 116 basis point increase in cost of time deposits. Average borrowings for the first quarter of 2024 of $2.0 billion had an average cost of 4.75%. On average, borrowings increased $406.7 million during the first quarter. The decrease in net interest margin of 35 basis points, compared to the first quarter of 2023, was primarily the result of an 82 basis point increase in cost of funds. Total cost of funds of 1.31% for the first quarter of 2024 increased from 0.49% for the year ago quarter. This increase in cost of funds was primarily the

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result of a $1.02 billion increase in average borrowings which had an average cost of 4.75% for the first quarter of 2024, and a $910 million decline in average noninterest bearing deposits. Additionally, interest-bearing deposit costs rose by 146 basis points from the prior year quarter. A 43 basis point increase in earning asset yields over the prior year quarter partially offset the increase in funding costs. Included in the higher earning asset yields, were higher loan yields, which grew from 4.90% for the first quarter of 2023 to 5.30% for the first quarter of 2024. Additionally, the yield on investment securities increased by 27 basis points from the prior year quarter, primarily due to the positive spread generated from the pay-fixed swaps, in which the Company receives daily SOFR and pays a weighted average fixed cost of approximately 3.8%.

Earning Assets and Deposits

On average, earning assets were relatively flat compared to the fourth quarter of 2023 and declined by $158.5 million when compared to the first quarter of 2023. Compared to the first quarter of 2023, the average balance of investment securities decreased by $405.0 million, while the average amount of funds held at the Federal Reserve increased by $396.5 million. Noninterest-bearing deposits declined on average by $268.1 million, or 3.60%, from the fourth quarter of 2023 and interest-bearing deposits and customer repurchase agreements declined on average by $241.1 million. Compared to the first quarter of 2023, total deposits and customer repurchase agreements declined on average by $1.32 billion, or 9.94%, including a decline of $910 million in noninterest-bearing deposits. On average, noninterest-bearing deposits were 61.72% of total deposits during the most recent quarter, compared to 61.30% for the fourth quarter of 2023 and 63.65% for the first quarter of 2023.

Provision for Credit Losses

There was no provision for credit losses in the first quarter of 2024, compared to a $2.0 million recapture of provision for credit losses in the fourth quarter of 2023 and $1.5 million in provision in the first quarter of 2023. Projected loss rates were 0.94% at March 31, 2024, compared to 0.98% at December 31, 2023 and 0.97% at March 31, 2023. Excluding specific reserves associated with non-performing or substandard loans, the projected loss rate on performing loans increased from 0.91% at the end of 2023 to 0.94% on March 31, 2024. The modest increase in projected loss rates continues to be driven primarily by economic forecast changes to various macroeconomic variables such as GDP growth, commercial real estate values and the rate of unemployment.

Noninterest Income

Noninterest income was $14.1 million for the first quarter of 2024, compared with $19.2 million for the fourth quarter of 2023 and $13.2 million for the first quarter of 2023. First quarter income from Bank Owned Life Insurance (“BOLI”) decreased by $4.3 million from the fourth quarter of 2023 and increased by $2.4 million compared to the first quarter of 2023, primarily due to restructuring and

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enhancements in BOLI policies in the fourth quarter of 2023. The first quarter of 2024 also included $531,000 in death benefits that exceeded the asset value on certain policies, compared to no death benefits for the fourth or first quarter of 2023. CRA investment related income declined by approximately $850,000 when compared to the fourth quarter of 2023, primarily due to the decline in underlying net asset values. Compared to the first quarter of 2023, CRA investment related income declined by approximately $800,000, due to both changes in net asset value of certain equity investments and a recapture in the prior year quarter of a $500,000 impairment charge. The first quarter of 2023 also included approximately $550,000 in interest rate swap related fees resulting from the conversion to SOFR of all of our previously originated interest rate swaps indexed to LIBOR. Service charges on deposits declined by $308,000, or 5.76% in comparison to the first quarter of 2023. Trust and investment service fees grew by $310,000, or 10.64% compared to the year-ago quarter.

Noninterest Expense

Noninterest expense for the first quarter of 2024 was $59.8 million, compared to $65.9 million for the fourth quarter of 2023 and $54.9 million for the first quarter of 2023. The $6.2 million quarter-over-quarter decrease was primarily due to the $6.8 million expense variance from accruing the estimated FDIC special assessment. On November 16, 2023, the FDIC approved a final rule to implement a special assessment to recover the loss to the Deposit Insurance Fund (DIF) associated with protecting uninsured depositors following the closures of Silicon Valley Bank and Signature Bank. As a result, the Company recorded noninterest expense of $9.2 million associated with the FDIC special assessment in the fourth quarter of 2023. In the first quarter of 2024, the FDIC revised their initial loss estimate described in their final rule by 25%, which resulted in the Company recording an additional $2.3 million for the FDIC special assessment in the first quarter. There was no provision or recapture of provision for unfunded loan commitments in the first quarter of 2024, compared to $500,000 in recapture of provision in the fourth quarter of 2023 and $500,000 in provision for the first quarter of 2023. Salaries and employee benefit costs increased $749,000, marketing and promotion expense decreased $462,000 due to higher donations in the fourth quarter, and professional services decreased $452,000, quarter-over-quarter. The $749,000 quarter-over-quarter increase in staff related expenses included $1.7 million in higher payroll taxes for bonuses paid in the first quarter of 2024, offset by a $900,000 decrease in bonus accruals compared to the fourth quarter.

The $4.9 million increase in noninterest expense year-over-year was impacted by the additional accrual of $2.3 million associated with the FDIC special assessment in the first quarter of 2024. Year-over-year expense growth included increased staff related expenses of $1.2 million, or 3.27%. This increase included a $330,000 decline in contra expense for deferred origination costs, resulting from a decline in loan originations in the first quarter of 2024, when compared to the prior year. Professional services also increased $559,000 year-over-year. As a percentage of average assets, noninterest expense was 1.48% for the first quarter of 2024, compared to 1.62% for the fourth quarter of 2023 and 1.36% for the first quarter of 2023. The efficiency ratio for the first quarter of 2024 was 47.22%, compared to 47.60% for the fourth quarter of 2023 and 39.50% for the first quarter of 2023.

Income Taxes

Our effective tax rate for the quarter ended March 31, 2024 was 27.25%, compared with 28.20% for the same period of 2023. Our estimated annual effective tax rate can vary depending upon the level of tax-advantaged income from municipal securities and BOLI, as well as available tax credits.

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BALANCE SHEET HIGHIGHTS

Assets

The Company reported total assets of $16.47 billion at March 31, 2024. This represented an increase of $447.2 million, or 2.79%, from total assets of $16.02 billion at December 31, 2023. The increase in assets included a $707.7 million increase in interest-earning balances due from the Federal Reserve, offset by a $129.0 million decrease in investment securities, and a $130.2 million decrease in net loans.

Total assets at March 31, 2024 increased by $194.1 million, or 1.19%, from total assets of $16.27 billion at March 31, 2023. The increase in assets was primarily due to an increase of $752.8 million in interest-earning balances due from the Federal Reserve and a $54.0 million increase in the cash surrender value of BOLI, partially offset by a $448.8 million decrease in investment securities and a $168.1 million decrease in net loans.

Investment Securities and BOLI

Total investment securities were $5.29 billion at March 31, 2024, a decrease of $129.0 million, or 2.38% from December 31, 2023, and a decrease of $448.8 million, or 7.82%, from $5.74 billion at March 31, 2023.

At March 31, 2024, investment securities held-to-maturity (“HTM”) totaled $2.45 billion, a decrease of $10.0 million, or 0.41% from December 31, 2023, and a decrease of $81.4 million, or 3.21%, from March 31, 2023.

At March 31, 2024, investment securities available-for-sale (“AFS”) totaled $2.84 billion, inclusive of a pre-tax net unrealized loss of $485.6 million. AFS securities decreased by $119.0 million, or 4.03% from December 31, 2023 and decreased by $367.4 million, or 11.47%, from $3.20 billion at March 31, 2023. Pre-tax unrealized loss grew by $35.9 million from December 31, 2023 and increased by $26.0 million from March 31, 2023.

Combined, the AFS and HTM investments in mortgage backed securities (“MBS”) and collateralized mortgage obligations (“CMO”) totaled $4.23 billion or approximately 80% of the total investment securities at March 31, 2024. Virtually all of our MBS and CMO are issued or guaranteed by government or government sponsored enterprises, which have the implied guarantee of the U.S. Government. In addition, at March 31, 2024, we had $559.4 million of Government Agency securities, that represent approximately 10.6% of the total investment securities.

Our combined AFS and HTM municipal securities totaled $490.4 million as of March 31, 2024, or 9.3% of our total investment portfolio. These securities are located in 35 states. Our largest concentrations of holdings by state, as a percentage of total municipal bonds, are located in Texas at 15.97%, Minnesota at 11.02%, and California at 9.63%.

At March 31, 2024, the Company had $310.7 million of Bank Owned Life insurance (“BOLI”), compared to $308.7 million December 31, 2023 and $256.7 million at March 31, 2023. The $54.0 million increase in value of BOLI, when compared to March 31, 2023, was primarily due to a restructuring of the Company’s life insurance policies at the end of 2023, including a $4.5 million write-down in value on surrender policies that was offset by a $10.9 million enhancement to cash surrender values, as well as additional policy purchases totaling $41 million. This restructuring is expected to increase future returns on our BOLI policies resulting in additional non-taxable noninterest income in future years.

Loans

Total loans and leases, at amortized cost, of $8.77 billion at March 31, 2024 decreased by $134.2 million, or 1.51%, from December 31, 2023. The quarter-over quarter decrease in loans included decreases of $64.0 million in commercial real estate loans, $61.3 million in dairy & livestock and agribusiness loans, $7.9 million in construction loans, and $6.8 million in commercial and industrial loans, partially offset by an increase of $6.6 million in SFR mortgage loans.

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Total loans and leases, at amortized cost, decreased by $171.8 million, or 1.92%, from March 31, 2023. The $171.8 million decrease included decreases of $229.8 million in commercial real estate loans, $25.2 million in construction loans, $15.1 million in SBA loans, $7.5 million in municipal lease financings, and $13.5 million in consumer and other loans, partially offset by increases of $65.0 million in commercial and industrial loans, $43.8 million in dairy & livestock and agribusiness loans, and $14.2 million in SFR mortgage loans.

Asset Quality

During the first quarter of 2024, we experienced credit charge-offs of $4.3 million and total recoveries of $242,000, resulting in net charge-offs of $4.0 million. The allowance for credit losses (“ACL”) totaled $82.8 million at March 31, 2024, compared to $86.8 million at December 31, 2023 and $86.5 million at March 31, 2023. At March 31, 2024, ACL as a percentage of total loans and leases outstanding was 0.94%. This compares to 0.98% and 0.97% at December 31, 2023 and March 31, 2023, respectively.

Nonperforming loans, defined as nonaccrual loans, including modified loans on nonaccrual, plus loans 90 days past due and accruing interest, and nonperforming assets, defined as nonperforming plus OREO, are highlighted below.

The $7.5 million decrease in nonperforming loans from December 31,2023 was primarily due to the payoff of two nonperforming commercial real estate loans totaling $2.5 million, the charge-off of one nonperforming commercial real estate loan totaling $2.3 million, and the charge-off of one nonperforming commercial industrial loan totaling $1.1 million. Classified loans are loans that are graded “substandard” or worse.

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Classified loans increased $883,000 quarter-over-quarter, primarily due to increases of $2.1 million in classified construction loans and $484,000 commercial real estate loans, partially offset by a $1.7 million decline in classified commercial and industrial loans primarily due the charge-off of one nonperforming commercial and industrial loan.

Deposits & Customer Repurchase Agreements

Deposits of $11.89 billion and customer repurchase agreements of $275.7 million totaled $12.17 billion at March 31, 2024. This represented a net increase of $465.4 million compared to December 31, 2023. The increase in total deposits at March 31, 2024 included $300 million in brokered deposits. Deposits and customer repurchases decreased on average from the prior quarter by $509.2 million, or 4.09%. Total deposits and customer repurchase agreements decreased $591.5 million, or 4.63% when compared to $12.76 billion at March 31, 2023.

Noninterest-bearing deposits were $7.11 billion at March 31, 2024, a decrease of $93.4 million, or 1.30%, when compared to $7.21 billion at December 31, 2023. Noninterest-bearing deposits decreased by $731.5 million, or 9.33% when compared to $7.84 billion at March 31, 2023. At March 31, 2024, noninterest-bearing deposits were 59.80% of total deposits, compared to 63.03% at December 31, 2023 and 63.92% at March 31, 2023.

Borrowings

As of March 31, 2024, total borrowings consisted of approximately $2.0 billion of one-year advances from the Federal Reserve’s Bank Term Funding Program, at an average cost of approximately 4.75%. The Bank Term Funding Program advances include maturities of approximately $695 million in May and $1.3 billion in January of 2025.

Capital

The Company’s total equity was $2.09 billion at March 31, 2024. This represented an overall increase of $8.9 million from total equity of $2.08 billion at December 31, 2023. Increases to equity included $48.6 million in net earnings, that were partially offset by $27.9 million in cash dividends and an $11.7 million decrease in other comprehensive income. We engaged in no stock repurchases during the first quarter of 2024. Our tangible book value per share at March 31, 2024 was $9.36.

Our capital ratios under the revised capital framework referred to as Basel III remain well-above regulatory standards.

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CitizensTrust

As of March 31, 2024 CitizensTrust had approximately $4.3 billion in assets under management and administration, including $3.09 billion in assets under management. Revenues were $3.2 million for the first quarter of 2024, compared to $2.9 million for the same period of 2023. CitizensTrust provides trust, investment and brokerage related services, as well as financial, estate and business succession planning.

Corporate Overview

CVB Financial Corp. (“CVBF”) is the holding company for Citizens Business Bank. CVBF is one of the 10 largest bank holding companies headquartered in California with approximately $16 billion in total assets. Citizens Business Bank is consistently recognized as one of the top performing banks in the nation and offers a wide array of banking, lending and investing services with more than 60 banking centers and three trust office locations serving California.

Shares of CVB Financial Corp. common stock are listed on the NASDAQ under the ticker symbol “CVBF”. For investor information on CVB Financial Corp., visit our Citizens Business Bank website at www.cbbank.com and click on the “Investors” tab.

Conference Call

Management will hold a conference call at 7:30 a.m. PDT/10:30 a.m. EDT on Thursday, April 25, 2024 to discuss the Company’s first quarter 2024 financial results. The conference call can be accessed live by registering at: https://register.vevent.com/register/BI52b6835d64f141e7be89d719f276a3f4

The conference call will also be simultaneously webcast over the Internet; please visit our Citizens Business Bank website at www.cbbank.com and click on the “Investors” tab to access the call from the site. Please access the website 15 minutes prior to the call to download any necessary audio software. This webcast will be recorded and available for replay on the Company’s website approximately two hours after the conclusion of the conference call and will be available on the website for approximately 12 months.

Safe Harbor

Certain statements set forth herein constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. Words such as “will likely result”, “aims”, “anticipates”, “believes”, “could”, “estimates”, “expects”, “hopes”, “intends”, “may”, “plans”, “projects”, “seeks”, “should”, “will,” “strategy”, “possibility”, and variations of these words and similar expressions help to identify these forward-looking statements, which involve risks and uncertainties that could cause actual results or performance to differ materially from those projected. These forward-looking statements are based on management’s current expectations and beliefs concerning future developments and their potential effects on the Company including, without limitation, plans, strategies, goals and statements about the Company’s outlook regarding revenue and asset growth, financial performance and profitability, capital and liquidity levels, loan and deposit levels, growth and retention, yields and returns, loan diversification and credit management, stockholder value creation, tax rates, the impact of economic developments, and the impact of acquisitions we have made or may make. Such statements involve inherent risks and uncertainties, many of which are difficult to predict and are generally beyond the control of the Company, and there can be no assurance that future developments affecting the Company will be the same as those anticipated by management. The Company cautions readers that a number of important factors, in addition to those set forth below, could cause actual results to differ materially from those expressed in, or implied or projected by, such forward-looking statements.

General risks and uncertainties include, but are not limited to, the following: the strength of the United States economy in general and the strength of the local economies in which we conduct business; the effects of, and changes in, trade, monetary, and fiscal policies and laws, including interest rate policies of the Board of Governors of the Federal Reserve System; inflation/deflation, interest rate, market and monetary fluctuations; the effect of acquisitions we have made or may make, including, without limitation, the failure to obtain the necessary regulatory approvals, the failure to achieve the expected revenue growth and/or expense savings from such acquisitions, and/or the failure to effectively integrate an acquisition target and key personnel into our operations; the timely development of competitive products and services and the acceptance of these products and services by new and existing customers; the impact of changes in financial services

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policies, laws, and regulations, including those concerning banking, taxes, securities, and insurance, and the application thereof by regulatory agencies; the effectiveness of our risk management framework and quantitative models; changes in the level of our nonperforming assets and charge-offs; the transition away from USD LIBOR and uncertainties regarding potential alternative reference rates, including SOFR; the effect of changes in accounting policies and practices or accounting standards, as may be adopted from time-to-time by bank regulatory agencies, the U.S. Securities and Exchange Commission (“SEC”), the Public Company Accounting Oversight Board, the Financial Accounting Standards Board or other accounting standards setters; possible credit related impairments or declines in the fair value of loans and securities held by us; possible impairment charges to goodwill on our balance sheet; changes in customer spending, borrowing, and savings habits; the effects of our lack of a diversified loan portfolio, including the risks of geographic and industry concentrations; periodic fluctuations in commercial or residential real estate prices or values; our ability to attract or retain deposits or to access government or private lending facilities and other sources of liquidity; the possibility that we may reduce or discontinue the payment of dividends on our common stock; changes in the financial performance and/or condition of our borrowers; changes in the competitive environment among financial and bank holding companies and other financial service providers; technological changes in banking and financial services; geopolitical conditions, including acts or threats of terrorism, actions taken by the United States or other governments in response to acts or threats of terrorism, and/or military conflicts, which could impact business and economic conditions in the United States and abroad; catastrophic events or natural disasters, including earthquakes, drought, climate change or extreme weather events that may affect our assets, communications or computer services, customers, employees or third party vendors; public health crises and pandemics, and their effects on the economic and business environments in which we operate, including on our asset credit quality, business operations, and employees, as well as the impact on general economic and financial market conditions; cybersecurity threats and fraud and the costs of defending against them, including the costs of compliance with legislation or regulations to combat fraud and cybersecurity threats; our ability to recruit and retain key executives, board members and other employees, and our ability to comply with federal and state in employment laws and regulations; ongoing or unanticipated regulatory or legal proceedings or outcomes; and our ability to manage the risks involved in the foregoing. Additional factors that could cause actual results to differ materially from those expressed in the forward-looking statements are discussed in the Company’s 2023 Annual Report on Form 10-K filed with the SEC and available at the SEC’s Internet site (http://www.sec.gov).

The Company does not undertake, and specifically disclaims any obligation, to update any forward-looking statements to reflect occurrences or unanticipated events or circumstances after the date of such statements, except as required by law. Any statements about future operating results, such as those concerning accretion and dilution to the Company’s earnings or shareholders, are for illustrative purposes only, are not forecasts, and actual results may differ.

Non-GAAP Financial Measures — Certain financial information provided in this earnings release has not been prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) and is presented on a non-GAAP basis. Investors and analysts should refer to the reconciliations included in this earnings release and should consider the Company’s non-GAAP measures in addition to, not as a substitute for or as superior to, measures prepared in accordance with GAAP. These measures may or may not be comparable to similarly titled measures used by other companies.

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CVB FINANCIAL CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

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CVB FINANCIAL CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED AVERAGE BALANCE SHEETS

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CVB FINANCIAL CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS

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CVB FINANCIAL CORP. AND SUBSIDIARIES

SELECTED FINANCIAL HIGHLIGHTS

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CVB FINANCIAL CORP. AND SUBSIDIARIES

SELECTED FINANCIAL HIGHLIGHTS

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Allowance for Credit Losses by Loan Type