Exhibit 99.1

Press Release

For Immediate Release

CVB Financial Corp. Reports Record First Quarter Earnings for 2014

Ontario, CA, April 23, 2014-CVB Financial Corp. (NASDAQ:CVBF) and its subsidiary, Citizens Business Bank (“the Company”), announced record earnings for the quarter ended March 31, 2014.

CVB Financial Corp. reported net income of $28.7 million for the first quarter of 2014, compared with $21.6 million for the first quarter of 2013. This represents a year-over-year increase of $7.0 million, or 32.6%. Diluted earnings per share were $0.27 for the first quarter of 2014, compared to $0.21 for the same period last year.

The allowance for loan losses was reduced by $7.5 million, and included $990,000 in net recoveries for the first quarter of 2014. This was primarily the result of a decrease in total loans and leases and improved credit quality. This compares with a reduction of $6.8 million for the fourth quarter of 2013, $3.8 million for the third quarter of 2013, $6.2 million for the second quarter of 2013, and zero provision for loan losses for the previous eight fiscal quarters.

Chris Myers, President and CEO commented, “We are pleased to report record earnings for the first quarter. Credit quality improvement and our continued emphasis on collecting non-performing and charged off loans allowed us to release $7.5 million in loan loss reserves. Although loan demand for the first quarter was slow, I am somewhat encouraged by the strengthening of our current loan pipeline. Our funding remains strong as we continued to organically grow core deposits.”

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Net income of $28.7 million for the first quarter of 2014 produced a return on beginning equity of 15.06%, a return on average equity of 14.74% and a return on average assets of 1.72%. The efficiency ratio for the first quarter of 2014 was 45.52%, compared to 50.21% for the first quarter of 2013.

Interest income and fees on loans for the first quarter of 2014 totaled $44.7 million, which included $1.7 million of discount accretion from accelerated principal reductions, payoffs and improved credit loss experienced on covered loans acquired from San Joaquin Bank (“SJB”). This represented an increase of $700,000, or 1.59%, when compared to total interest income on loans of $44.0 million for the fourth quarter of 2013, which included $2.1 million of discount accretion, and a decrease of $1.4 million, or 3.02%, from the year ago quarter, which included $4.4 million of discount accretion.

Noninterest income was $11.5 million for the first quarter of 2014, compared with $5.9 million for the fourth quarter of 2013 and $6.7 million for the first quarter of 2013. The quarter-over-quarter increase was primarily due to a $5.3 million pre-tax gain on the sale of a loan held-for-sale in the first quarter of 2014. The gain on sale of a loan held-for-sale was partially offset by a $1.7 million net decrease in the FDIC loss sharing asset, compared to a $2.1 million net decrease for the fourth quarter of 2013. Noninterest income for the year-ago first quarter of 2013 included a net pre-tax gain of $2.1 million on the sale of investment securities and a $4.0 million net decrease in the FDIC loss sharing asset.

Noninterest expense for the first quarter of 2014 was $31.2 million, an increase of $1.9 million over the fourth quarter of 2013 and $359,000 over the first quarter of 2013. As a percentage of average assets, noninterest expense was 1.87%, compared to 1.74% for the fourth quarter of 2013 and 1.97% for the first quarter of 2013. The quarter-over-quarter increase was primarily due to a $1.2 million increase in salaries and employee benefits, principally due to increased health care costs for which we expect partial insurance reimbursement, new hire expenses, and other employee benefits. Additional costs included merger related expenses of $427,000 in connection with our announced proposed acquisition of American Security Bank, and $259,000 in branch consolidation costs due to the closures of one of our Bakersfield center locations and the Stockton Business Financial Center.

Net Interest Income and Net Interest Margin

Net interest income, before provision for loan losses, was $56.9 million for the first quarter of 2014, an increase of $1.8 million from $55.1 million for the fourth quarter of 2013 and an increase of $2.3 million from $54.6 million for the first quarter of 2013. Excluding the impact of the yield adjustment on covered loans, our net interest margin (tax equivalent) was 3.60% for the first quarter of 2014, compared to 3.47% for the fourth quarter of 2013 and 3.54% for the first quarter of 2013. Total average earning asset yields (excluding discount) increased to 3.87% for the first quarter of 2014 from 3.73% for the fourth quarter of 2013 and 3.83% for the first quarter of 2013. Total cost of funds was 0.28% for the first quarter of 2014, which was unchanged from the fourth quarter of 2013. Cost of funds was 0.31% for the first quarter of 2013. During the first quarter of 2014, we had one non-performing commercial real estate loan that was paid in full, resulting in a $2.3 million increase in interest income. This positively impacted our net interest margin by approximately 15 basis points.

Income Taxes

Our effective tax rate for the three months ended March 31, 2014 was 36.00%, compared with 29.21% for the same period of 2013. Our estimated annual effective tax rate varies depending upon tax-advantaged income as well as available tax credits. We benefited from approximately $1.1 million of enterprise zone tax credits in the first quarter of 2013, many of which have been eliminated in 2014.

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Assets

The Company reported total assets of $6.90 billion at March 31, 2014. This represents an increase of $237.6 million, or 3.56%, from total assets of $6.66 billion at December 31, 2013. Earning assets of $6.55 billion at March 31, 2014 increased $223.9 million, or 3.54%, when compared with $6.32 billion at December 31, 2013. The increase in earning assets was primarily due to a $291.4 million increase in interest-earning deposits with the Federal Reserve Bank and an $86.4 million increase in investment securities. This was partially offset by a $147.0 million decrease in total loans and a $6.8 million decrease in FHLB stock.

Total assets of $6.90 billion at March 31, 2014 increased $636.8 million, or 10.16%, from total assets of $6.27 billion at March 31, 2013. Earning assets totaled $6.55 billion at March 31, 2014, an increase of $610.1 million, or 10.27%, when compared with earning assets of $5.94 billion at March 31, 2013. The increase in earning assets was primarily due to a $359.1 million increase in investment securities, a $241.7 million increase in interest-earning deposits with the Federal Reserve Bank, and a $34.7 million increase in total loans. This was partially offset by a $25.4 million decrease in FHLB stock.

Investment Securities

Investment securities were $2.75 billion at March 31, 2014, an increase of $86.4 million from $2.67 billion at December 31, 2013, and an increase of $359.1 million from $2.39 billion at March 31, 2013. As of March 31, 2014, we had a pre-tax unrealized gain of $8.7 million on our overall securities portfolio.

MBS totaled $1.87 billion at March 31, 2014, compared to $1.75 billion at December 31, 2013. Virtually all of our mortgage-backed securities are issued by Freddie Mac or Fannie Mae, which have the implied guarantee of the U.S. Government. We have one Alt-A bond, with a carrying value of $1.7 million as of March 31, 2014, which has had $1.9 million in net other-than-temporary (“OTTI”) impairment loss to date since it was purchased in early 2008. No additional OTTI impairment was recorded for the quarter ended March 31, 2014.

Our municipal securities, totaling $564.7 million, are located in 27 states, and approximately $25.2 million, or 4.5%, are located within the state of California. Our largest concentrations of holdings are in Michigan at 13.2%, New Jersey at 11.5% and Texas at 9.3%. All municipal bond securities are performing.

In the first quarter of 2014, we purchased $168.4 million of MBS with an average yield of 2.18%. Our new purchases of MBS have an average duration of approximately four years. We also purchased $3.1 million in municipal securities with an average tax-equivalent yield of 3.65%.

Loans

Total loans and leases, net of deferred fees and discount, of $3.40 billion at March 31, 2014 decreased by $147.0 million, or 4.14%, from $3.55 billion at December 31, 2013. Quarter-over-quarter, non-covered loans decreased by $132.0 million, and covered loans decreased by $15.0 million. The $132.0 million decrease in non-covered loans was principally due to decreases of $81.3 million in dairy & livestock and agribusiness loans, $22.1 million in commercial and industrial loans,

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$13.5 million in commercial real estate loans and $8.1 million in municipal lease finance receivables. The majority of the decline in dairy & livestock and agribusiness loans was primarily attributed to improved profitability due to higher milk prices and normal seasonal paydowns. The overall decrease in loans was partially offset by an increase of $6.1 million in SFR mortgage loans, for the quarter.

Total loans and leases, net of deferred fees and discount, of $3.40 billion at March 31, 2014, increased by $34.7 million, or 1.03%, from $3.37 billion at March 31, 2013. Non-covered loans grew by $68.0 million year-over-year, while covered loans declined by $33.4 million.

Deposits & Customer Repurchase Agreements

Deposits of $5.11 billion and customer repurchase agreements of $626.8 million totaled $5.74 billion at March 31, 2014. This represents an increase of $203.7 million, or 3.68%, when compared with total deposits and customer repurchase agreements of $5.53 billion at December 31, 2013. Deposits and customer repurchase agreements increased by $551.3 million, or 10.63%, when compared with $5.19 billion in total deposits and customer repurchase agreements reported at March 31, 2013.

Noninterest-bearing deposits were $2.69 billion at March 31, 2014, an increase of $125.6 million, or 4.90%, compared to $2.56 billion at December 31, 2013, and an increase of $321.9 million, or 13.60%, when compared to the quarter ended March 31, 2013. At March 31, 2014, noninterest-bearing deposits were 52.61% of total deposits, compared to 52.41% at December 31, 2013 and 50.50% at March 31, 2013.

Our average cost of total deposits was 0.10% for the quarter ended March 31, 2014, compared to 0.11% for the same period last year. Our cost of total deposits including customer repurchase agreements was 0.12% for the quarters ended March 31, 2014 and 2013.

FHLB Advances, Other Borrowings and Debentures

We had $199.3 million in FHLB advances at March 31, 2014, compared to $199.2 million at December 31, 2013 and $199.0 million at March 31, 2013.

At March 31, 2014, we had $25.8 million of junior subordinated debentures, unchanged from December 31, 2013. At March 31, 2013, junior subordinated debentures totaled $46.4 million. On April 7, 2013, we redeemed the remaining outstanding capital and common securities issued by CVB Statutory Trust II, totaling $20.6 million. We took these actions to reduce our funding costs.

Asset Quality

We have separated the discussion of asset quality into two sections: non-covered loans and covered loans. The non-covered loans represent the legacy and ongoing Citizens Business Bank loans and exclude all loans acquired in the SJB acquisition. The SJB loans are “covered” loans as defined in the loss sharing agreement with the FDIC. These loans were marked to fair value at the acquisition date.

Citizens Business Bank Asset Quality (Non-covered loans)

The allowance for loan losses decreased to $68.7 million at March 31, 2014, compared to $75.2 million at December 31, 2013 and $92.2 million at March 31, 2013. The quarter-over-quarter decrease was due to a $7.5 million reduction in the allowance for loan losses for the first quarter of 2014, primarily due to a decrease in total loans outstanding, improved credit quality and $990,000 in net recoveries of previously charged off loans. The allowance for loan losses was 2.11%, 2.22%, 2.46%, 2.70%, and 2.89% of total non-covered loans and leases outstanding at March 31, 2014, December 31, 2013, September 30, 2013, June 30, 2013, and March 31, 2013, respectively.

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Nonperforming loans, defined as nonaccrual loans and nonperforming troubled debt restructured loans (“TDR”), were $40.2 million at March 31, 2014, or 1.23% of total loans. This compares to nonperforming loans of $40.0 million, or 1.18% of total loans, at December 31, 2013 and $55.1 million, or 1.73% of total loans, at March 31, 2013. The $40.2 million in nonperforming loans at March 31, 2014 are summarized as follows: $11.8 million in commercial real estate, $9.9 million in commercial construction, $7.9 million in SFR mortgage loans, $5.4 million in dairy & livestock and agribusiness, $4.8 million in commercial and industrial, and $397,000 in other loans. The $248,000 increase in nonperforming loans quarter-over-quarter was principally due to a $960,000 increase in nonperforming commercial and industrial loans and a $291,000 increase in nonperforming SFR mortgage pool loans. This was partially offset by a $558,000 decrease in nonperforming commercial real estate loans and a $342,000 decrease in dairy & livestock and agribusiness loans.

We had $6.5 million in OREO at March 31, 2014 and December 31, 2013 and $13.3 million at March 31, 2013. As of March 31, 2014 and December 31, 2013, we had two OREO properties, compared to four OREO properties at March 31, 2013.

At March 31, 2014, we had loans delinquent 30 to 89 days of $960,000. This compares to $3.3 million at December 31, 2013, and $4.7 million at March 31, 2013. As a percentage of total loans, delinquencies, excluding nonaccruals, were 0.03% at March 31, 2014, 0.10% at December 31, 2013, and 0.15% at March 31, 2013. All loans delinquent 90 days or more were categorized as nonperforming.

At March 31, 2014, we had $66.4 million in performing TDR loans, compared to $67.0 million in performing TDR loans at December 31, 2013, and $57.6 million in performing TDR loans at March 31, 2013. In terms of the number of loans, we had 44 performing TDR loans at March 31, 2014, compared to 47 performing TDR loans at December 31, 2013, and 44 performing TDR loans at March 31, 2013.

Nonperforming assets, defined as non-covered nonaccrual loans and other real estate owned, totaled $46.7 million at March 31, 2014, $46.4 million at December 31, 2013, and $68.5 million at March 31, 2013.

Classified loans are loans that are graded “substandard” or worse. At March 31, 2014, classified loans totaled $219.0 million, compared to $245.6 million at December 31, 2013, and $319.5 million at March 31, 2013. The $26.6 million quarter-over-quarter reduction in classified loans was primarily due to decreases of $14.6 million in our classified dairy & livestock portfolio, $6.4 million in our classified municipal lease portfolio, and $2.8 million in our classified commercial real estate portfolio.

San Joaquin Bank Asset Quality (Covered loans)

At March 31, 2014, we had $156.5 million of gross loans remaining from SJB with a carrying value of $145.3 million, compared to $173.1 million of gross loans at December 31, 2013 with a carrying value of $160.3 million. We had $199.6 million of gross loans from SJB with a carrying value of $178.7 million at March 31, 2013. Of the gross loans, we had $14.0 million in nonperforming loans as of March 31, 2014, or 8.96%, compared to $18.5 million in nonperforming loans at December 31, 2013, or 10.70%. We had two properties in OREO totaling $504,000 at March 31, 2014, and December 31, 2013, compared to two properties totaling $857,000 at March 31, 2013.

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CitizensTrust

CitizensTrust had approximately $2.44 billion in assets under management and administration, including $1.84 billion in assets under management, as of March 31, 2014. Revenues were $1.9 million for the first quarter of 2014, compared to $2.0 million for the same period in 2013. CitizensTrust provides trust, investment and brokerage related services, as well as financial, estate and business succession planning.

Corporate Overview

CVB Financial Corp. is the holding company for Citizens Business Bank. The Bank is the largest financial institution headquartered in the Inland Empire region of Southern California with assets of $6.90 billion. Citizens Business Bank serves 39 cities with 37 Business Financial Centers, six Commercial Banking Centers and three trust office locations serving the Inland Empire, Los Angeles County, Orange County, San Diego County and the Central Valley areas of California.

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

Conference Call

Management will hold a conference call at 7:30 a.m. Pacific time/10:30 a.m. Eastern time on Thursday, April 24, 2014 to discuss the Company’s first quarter 2014 financial results.

To listen to the conference call, please dial (888) 317-6016. A taped replay will be made available approximately one hour after the conclusion of the call and will remain available through May 8, 2014 at 6:00 a.m. Pacific time/9:00 a.m. Eastern time. To access the replay, please dial (877) 344-7529, passcode 10043496.

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 “Our 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 twelve months.

Disclosure

This press release contains certain non-GAAP financial disclosures for tangible common equity, earnings before income taxes, which we refer to as “pre-tax earnings”, and net interest income and net interest margin adjusted for discount accretion on covered loans. The Company uses certain non-GAAP financial measures to provide meaningful supplemental information regarding the Company’s operational performance and to enhance investors’ overall understanding of such financial performance. Please refer to the tables at the end of this release for a presentation of performance ratios in accordance with GAAP and a reconciliation of the non-GAAP financial measures to the GAAP financial measures.

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Safe Harbor

Certain matters set forth herein (including the exhibits hereto) constitute forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995, including forward-looking statements relating to the Company’s current business plans and expectations regarding future operating results. These forward-looking statements are subject to risks and uncertainties that could cause actual results, performance and/or achievements to differ materially from those projected. These risks and uncertainties include, but are not limited to, local, regional, national and international economic and market conditions and events and the impact they may have on us and our customers; our ability to attract deposits and other sources of liquidity; supply and demand for real property inventory and periodic deterioration in values of California real estate, both residential and commercial; a prolonged slowdown or decline in construction activity; changes in the financial performance and/or condition of our borrowers; changes in the level of nonperforming assets and charge-offs; the cost or effect of acquisitions we may make; the effect of changes in laws and regulations (including laws, regulations and judicial decisions concerning financial reforms, taxes, banking capital levels, securities and securities trading and hedging, employment, executive compensation, insurance and information security) with which we and our subsidiaries must comply; changes in estimates of future reserve requirements and minimum capital requirements based upon the periodic review thereof under relevant regulatory and accounting requirements, including changes in the Basel Committee framework establishing capital standards for credit, operations and market risk; inflation, interest rate, securities market and monetary fluctuations; changes in government interest rate or monetary policies; changes in the amount and availability of deposit insurance; cyber-security threats including loss of system functionality or theft or loss of Company or customer data or money; political instability; acts of war or terrorism, or natural disasters, such as earthquakes, or the effects of pandemic diseases; the timely development and acceptance of new banking products and services and the perceived overall value of these products and services by users; changes in consumer spending, borrowing and savings habits; technological changes and the expanding use of technology in banking (including the adoption of mobile banking applications); the ability to retain and increase market share, retain and grow customers and control expenses; changes in the competitive environment among financial and bank holding companies and other financial service providers; continued volatility in the credit and equity markets and its effect on the general economy or local business conditions; fluctuations in the price of the Company’s stock; the effect of changes in accounting policies and practices, as may be adopted from time-to-time by the regulatory agencies, as well as by the Public Company Accounting Oversight Board, the Financial Accounting Standards Board and other accounting standard-setters; changes in our organization, management, compensation and benefit plans, and our ability to retain or expand our management team and/or our board of directors; the costs and effects of legal, compliance and regulatory developments, including the resolution of legal proceedings or regulatory or other governmental inquiries or investigations and the results of regulatory examinations or reviews; our success at managing the risks involved in the foregoing items and all other factors set forth in the Company’s public reports including its Annual Report on Form 10-K for the year ended December 31, 2013, and particularly the discussion of risk factors within that document. 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.

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CVB FINANCIAL CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED BALANCE SHEETS

(Unaudited)

(Dollars in thousands)

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CVB FINANCIAL CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED AVERAGE BALANCE SHEETS

(Unaudited)

(Dollars in thousands)

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CVB FINANCIAL CORP. AND SUBSIDIARIES

CONDENSED CONSOLIDATED STATEMENTS OF EARNINGS

(Unaudited)

(Dollars in thousands, except per share amounts)

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CVB FINANCIAL CORP. AND SUBSIDIARIES

SELECTED FINANCIAL HIGHLIGHTS

(Unaudited)

(Dollars in thousands, except per share amounts)

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CVB FINANCIAL CORP. AND SUBSIDIARIES

SELECTED FINANCIAL HIGHLIGHTS

(Unaudited)

(Dollars in thousands, except per share amounts)

Quarterly Common Stock Price

Quarterly Consolidated Statements of Earnings

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CVB FINANCIAL CORP. AND SUBSIDIARIES

SELECTED FINANCIAL HIGHLIGHTS

(Unaudited)

(Dollars in thousands)

Loan Portfolio by Type

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CVB FINANCIAL CORP. AND SUBSIDIARIES

SELECTED FINANCIAL HIGHLIGHTS

(Unaudited)

(Dollars in thousands)

Nonperforming Assets and Delinquency Trends

(Non-Covered Loans)

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Net Interest Income and Net Interest Margin Reconciliations (Non-GAAP)

We use certain non-GAAP financial measures to provide supplemental information regarding our performance. Net interest income for the three months ended March 31, 2014, and 2013 include a yield adjustment of $1.7 million, and $4.4 million, respectively. These yield adjustments relate to discount accretion on covered loans, and are reflected in the Company’s net interest margin. We believe that presenting net interest income and the net interest margin excluding these yield adjustments provides additional clarity to the users of financial statements regarding core net interest income and net interest margin.

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Tangible book value reconciliations (Non-GAAP)

The tangible book value per share is a Non-GAAP disclosure. The Company uses certain non-GAAP financial measures to provide supplemental information regarding the Company’s performance. The following is a reconciliation of tangible book value to the Company stockholders’ equity computed in accordance with GAAP, as well as a calculation of tangible book value per share as of March 31, 2014, and 2013.

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