UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

For the Quarterly Period Ended March 31, 2012

or

For the Transition Period From             To             

Commission File Number: 000-30421

HANMI FINANCIAL CORPORATION

(Exact Name of Registrant as Specified in its Charter)

(213) 382-2200

(Registrant’s Telephone Number, Including Area Code)

Not Applicable

(Former Name, Former Address and Former Fiscal Year, If Changed Since Last Report)

Indicate by check mark whether the Registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the Registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the Registrant has submitted electronically and posted on its corporate Website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T during the preceding 12 months (or for such shorter period that the Registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the Registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the Registrant is a shell company (as defined in Rule 12b-2 of the Act).    Yes  ¨    No  x

As of April 30, 2012, there were 31,489,201 outstanding shares of the Registrant’s Common Stock.

HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

QUARTERLY REPORT ON FORM 10-Q

THREE MONTHS ENDED MARCH 31, 2012

TABLE OF CONTENTS

PART I — FINANCIAL INFORMATION

HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED BALANCE SHEETS (UNAUDITED)

(In Thousands, Except Share Data)

See Accompanying Notes to Consolidated Financial Statements. (Unaudited)

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HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF OPERATIONS (UNAUDITED)

(In Thousands, Except Per Share Data)

See Accompanying Notes to Consolidated Financial Statements. (Unaudited)

2

HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED)

(In Thousands)

See Accompanying Notes to Consolidated Financial Statements. (Unaudited)

3

HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS’ EQUITY (UNAUDITED)

(In Thousands)

See Accompanying Notes to Consolidated Financial Statements (Unaudited).

4

HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED)

(In Thousands)

See Accompanying Notes to Consolidated Financial Statements (Unaudited).

5

HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

THREE MONTHS ENDED MARCH 31, 2012 AND 2011

NOTE 1 — BASIS OF PRESENTATION

Hanmi Financial Corporation (“Hanmi Financial,” “we” or “us”) is a Delaware corporation and is subject to the Bank Holding Company Act of 1956, as amended. Our primary subsidiary is Hanmi Bank (the “Bank”), a California state chartered bank. Our other subsidiaries are Chun-Ha Insurance Services, Inc., a California corporation (“Chun-Ha”), and All World Insurance Services, Inc., a California corporation (“All World”).

In the opinion of management, the accompanying unaudited consolidated financial statements of Hanmi Financial Corporation and Subsidiaries reflect all adjustments of a normal and recurring nature that are necessary for a fair presentation of the results for the interim period ended March 31, 2012, but are not necessarily indicative of the results that will be reported for the entire year. Certain information and footnote disclosures normally included in annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been condensed or omitted. In the opinion of management, the aforementioned unaudited consolidated financial statements are in conformity with GAAP. Such interim consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q pursuant to the rules and regulations of the Securities and Exchange Commission. The interim information should be read in conjunction with our Annual Report on Form 10-K for the fiscal year ended December 31, 2011 (the “2011 Annual Report on Form 10-K”).

The preparation of interim consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.

Descriptions of our significant accounting policies are included in “Note 2 — Summary of Significant Accounting Policies” in our 2011 Annual Report on Form 10-K.

Certain reclassifications were made to the prior period’s presentation to conform to the current period’s presentation.

The number of shares of Hanmi Financial’s common stock and the computation of basic and diluted earnings per share were adjusted retroactively for all periods presented to reflect the 1-for-8 reverse stock split of Hanmi Financial’s common stock, which became effective on December 19, 2011.

NOTE 2 — REGULATORY MATTERS

On November 2, 2009, the members of the Board of Directors of the Bank consented to the issuance of the Final Order (“Final Order”) with the California Department of Financial Institutions (the “DFI”). The Final Order contained a list of requirements ranging from a capital directive to developing a contingency funding plan. Following a full scope target examination of the Bank by the DFI which commenced in February 2012, and based on the improved condition of the Bank noted at the examination, on May 1, 2012, the Bank entered into a Memorandum of Understanding (“MOU”) with the DFI. Concurrently with the entry into the MOU, the DFI issued an order terminating the Final Order. The MOU imposes substantially less requirements on the Bank, however, under the provisions of the MOU, the Bank is required to continue to maintain a ratio of tangible stockholders’ equity to total tangible assets of not less than 9.5 percent.

On November 2, 2009, Hanmi Financial and the Bank entered into a Written Agreement (the “Written Agreement”) with the Federal Reserve Bank of San Francisco (the “FRB”). The Written Agreement contains a list of strict requirements ranging from a capital directive to developing a contingency funding plan.

While Hanmi Financial has taken such actions as necessary to enable Hanmi Financial and the Bank to comply with the requirements of the Written Agreement and the MOU, there can be no assurance that compliance with the Written Agreement and the MOU will not have material and adverse effects on the operations and financial condition of Hanmi Financial and the Bank. Any material failure to comply with the provisions of the Written Agreement and the MOU could result in further enforcement actions by both the DFI and the FRB, or the placing of the Bank into conservatorship or receivership.

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HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

THREE MONTHS ENDED MARCH 31, 2012 AND 2011 (Continued)

NOTE 2 — REGULATORY MATTERS (Continued)

Written Agreement and MOU

Pursuant to the Written Agreement, the Board of Directors of the Bank prepared and submitted written plans to the FRB that addressed the following items: (i) strengthening board oversight of the management and operation of the Bank; (ii) strengthening credit risk management practices; (iii) improving credit administration policies and procedures; (iv) improving the Bank’s position with respect to problem assets; (v) maintaining adequate reserves for loan and lease losses; (vi) improving the capital position of the Bank and, of Hanmi Financial; and (vii) improving the Bank’s earnings through a strategic plan and a budget; (viii) improving the Bank’s liquidity position, funds management practices, and contingency funding plan. In addition, the Written Agreement place restrictions on the Bank’s lending to borrowers who have adversely classified loans with the Bank. The Written Agreement also requires the Bank to charge off or collect certain problem loans and review and revise its methodology for calculating allowance for loan and lease losses consistent with relevant supervisory guidance. Hanmi Financial and the Bank are also prohibited from paying dividends, without prior approval from the FRB.

Hanmi Financial and the Bank are required to notify the FRB if their respective capital ratios fall below those set forth in the capital plan approved by the FRB.

The MOU imposes substantially less requirements on the Bank than the Final Order. Pursuant to the MOU, the Bank is required to continue to (i) maintain strong board oversight, management and operation of the Bank, (ii) review and implement policies and procedures to address credit administration and credit risk management, (iii) maintain an acceptable methodology for calculating loan and lease losses, (iv) obtain the prior approval from the DFI prior to declaring and paying dividends, and (v) maintain a ratio of tangible stockholders’ equity to total tangible assets of not less than 9.5 percent.

On November 18, 2011, we completed an underwritten public offering of our common stock by which we raised $77.1 million in net proceeds. As a result, we satisfied the requirement that the ratio of tangible stockholders’ equity to total tangible assets be not less than 9.5 percent, as of December 31, 2011. As of Mach 31, 2012, Hanmi Financial and the Bank had a ratio of tangible stockholders’ equity to total tangible assets ratio of 10.55 percent and 12.71 percent, respectively.

Based on submissions to and consultations with the DFI and the FRB, we believe that the Bank has taken the required corrective action and has complied with substantially all of the requirements of the Written Agreement and the MOU.

Risk-Based Capital

Federal bank regulatory agencies require a minimum ratio of qualifying total capital to risk-weighted assets of 8.0 percent and a minimum ratio of Tier 1 capital to risk-weighted assets of 4.0 percent. In addition to the risk-based guidelines, federal bank regulatory agencies require banking organizations to maintain a minimum ratio of Tier 1 capital to average total assets, referred to as the leverage ratio, of 4.0 percent. For a bank rated in the highest of the five categories used by federal bank regulatory agencies to rate banks, the minimum leverage ratio is 3.0 percent. In addition to these uniform risk-based capital guidelines that apply across the industry, federal bank regulatory agencies have the discretion to set individual minimum capital requirements for specific institutions at rates significantly above the minimum guidelines and ratios.

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HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

THREE MONTHS ENDED MARCH 31, 2012 AND 2011 (Continued)

NOTE 2 — REGULATORY MATTERS (Continued)

Risk-Based Capital (Continued)

The capital ratios of Hanmi Financial and the Bank were as follows as of March 31, 2012 and 2011, respectively:

Reserve Requirement

The Bank is required to maintain a percentage of its deposits as reserves at the FRB. The daily average reserve balance required to be maintained with the FRB was $1.5 million, and the Bank was in compliance with the such requirement as of March 31, 2012 and December 31, 2011, respectively.

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HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

THREE MONTHS ENDED MARCH 31, 2012 AND 2011 (Continued)

NOTE 3 — FAIR VALUE MEASUREMENTS

Fair Value Option and Fair Value Measurements

FASB ASC 820, “Fair Value Measurements and Disclosures,” defines fair value, establishes a framework for measuring fair value and expands disclosures about fair value measurements. It also establishes a fair value hierarchy about the assumptions used to measure fair value and clarifies assumptions about risk and the effect of a restriction on the sale or use of an asset.

FASB ASC 825, “Financial Instruments,” provides additional guidance for estimating fair value in accordance with FASB ASC 820 when the volume and level of activity for the asset or liability have significantly decreased. It also includes guidance on identifying circumstances that indicate a transaction is not orderly. FASB ASC 825 emphasizes that even if there has been a significant decrease in the volume and level of activity for the asset or liability and regardless of the valuation technique(s) used, the objective of a fair value measurement remains the same. FASB ASC 825 also requires additional disclosures relating to fair value measurement inputs and valuation techniques, as well as disclosures of all debt and equity investment securities by major security types rather than by major security categories that should be based on the nature and risks of the securities during both interim and annual periods. FASB ASC 825 became effective for interim and annual reporting periods ending after June 15, 2009 and did not require disclosures for earlier periods presented for comparative purposes at initial adoption. In periods after initial adoption, FASB ASC 825 requires comparative disclosures only for periods ending after initial adoption. We adopted FASB ASC 825 in the second quarter of 2009. The adoption of FASB ASC 825 resulted in additional disclosures that are presented in “Note 4 – Investment Securities.”

FASB ASU 2011-04, “Amendments to Achieve Common Fair Value Measurement and Disclosure Requirements in U.S. GAAP and IFRSs (Topic 820),” provides guidance on fair value measurement and disclosure requirements that the FASB deemed largely identical across U.S. GAAP and IFRS. The requirements do not extend the use of fair value accounting, but provide guidance on how it should be applied where its use is already required or allowed. ASU 2011-04 supersedes most of the guidance in ASC topic 820, but many of the changes are clarifications of existing guidance or wording changes to reflect IFRS 13. Amendments in FASB ASU 2011-04 change the wording used to describe U.S. GAAP requirements for fair value and disclosing information about fair value measurements. FASB ASU 2011-04 became effective for interim and annual reporting periods beginning after December 15, 2011, and early application was not permitted. Our adoption of FASB ASU 2011-04 did not have a significant impact on our financial condition or result of operations.

We used the following methods and significant assumptions to estimate fair value:

Investment Securities Available for Sale – The fair values of investment securities available for sale are determined by obtaining quoted prices on nationally recognized securities exchanges or matrix pricing, which is a mathematical technique used widely in the industry to value debt securities without relying exclusively on quoted prices for the specific securities but rather by relying on the securities’ relationship to other benchmark quoted securities. The fair values of investment securities are determined by reference to the average of at least two quoted market prices obtained from independent external brokers or independent external pricing service providers who have experience in valuing these securities. In obtaining such valuation information from third parties, we have evaluated the methodologies used to develop the resulting fair values. We perform a monthly analysis on the broker quotes received from third parties to ensure that the prices represent a reasonable estimate of the fair value. The procedures include, but are not limited to, initial and on-going review of third party pricing methodologies, review of pricing trends, and monitoring of trading volumes.

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HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

THREE MONTHS ENDED MARCH 31, 2012 AND 2011 (Continued)

NOTE 3 — FAIR VALUE MEASUREMENTS (Continued)

Level 1 investment securities include U.S. government and agency debentures and equity securities that are traded on an active exchange or by dealers or brokers in active over-the-counter markets. The fair value of these securities is determined by quoted prices on an active exchange or over-the-counter market. Level 2 investment securities primarily include mortgage-backed securities, municipal bonds, collateralized mortgage obligations, and asset-backed securities. In determining the fair value of the securities’ categorized as Level 2, we obtain reports from nationally recognized broker-dealers detailing the fair value of each investment security we hold as of each reporting date. The broker-dealers use observable market information to value our fixed income securities, with the primary sources being nationally recognized pricing services. The fair value of the municipal securities is based on a proprietary model maintained by the broker-dealer. We review the market prices provided by the broker-dealer for our securities for reasonableness based on our understanding of the marketplace and we also consider any credit issues related to the bonds. As we have not made any adjustments to the market quotes provided to us and they are based on observable market data, they have been categorized as Level 2 within the fair value hierarchy.

Securities classified as Level 3 investment securities are instruments that are not traded in the market. As such, no observable market data for the instrument is available. This necessitates the use of significant unobservable inputs into our proprietary valuation model. As of March 31, 2012 and December 31, 2011, we had no level 3 investment securities.

SBA Loans Held for Sale – Small Business Administration (“SBA”) loans held for sale are carried at the lower of cost or fair value. As of March 31, 2012 and December 31, 2011, we had $30.9 million and $5.1 million of SBA loans held for sale, respectively. Management obtains quotes, bids or pricing indication sheets on all or part of these loans directly from the purchasing financial institutions. Premiums received or to be received on the quotes, bids or pricing indication sheets are indicative of the fact that cost is lower than fair value. At March 31, 2012 and December 31, 2011, the entire balance of SBA loans held for sale was recorded at its cost. We record SBA loans held for sale on a nonrecurring basis with Level 2 inputs.

Non-performing Loans Held for Sale – We reclassify certain non-performing loans when we make the decision to sell those loans. The fair value of non-performing loans held for sale is generally based upon the quotes, bids or sales contract price which approximate their fair value. Non-performing loans held for sale are recorded at estimated fair value less anticipated liquidation cost. As of March 31, 2012 and December 31, 2011, we had $15.5 million and $15.0 million of non-performing loans held for sale, respectively. We measure non-performing loans held for sale at fair value on a nonrecurring basis with Level 3 inputs.

Impaired Loans – FASB ASC 820 applies to loans measured for impairment using the practical expedients permitted by FASB ASC 310, “Receivables,” including impaired loans measured at an observable market price (if available), or at the fair value of the loan’s collateral (if the loan is collateral dependent). Fair value of the loan’s collateral, when the loan is dependent on collateral, is determined by appraisals or independent valuation, which is then adjusted for the cost related to liquidation of the collateral. These loans are classified as Level 3 and subject to non-recurring fair value adjustments.

Other Real Estate Owned – Other real estate owned is measured at fair value less selling costs. Fair value was determined based on third-party appraisals of fair value in an orderly sale. Selling costs were based on standard market factors. We classify other real estate owned, which is subject to non-recurring fair value adjustments, as Level 3.

Servicing Assets and Servicing Liabilities – The fair values of servicing assets and servicing liabilities are based on a valuation model that calculates the present value of estimated net future cash flows related to contractually specified servicing fees. The valuation model incorporates assumptions that market participants would use in estimating future cash flows. We compare the valuation model inputs and results to widely available published industry data for reasonableness. Since fair value measurements of servicing assets and servicing liabilities use significant unobservable inputs, we classify them as Level 3.

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HANMI FINANCIAL CORPORATION AND SUBSIDIARIES

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (UNAUDITED)

THREE MONTHS ENDED MARCH 31, 2012 AND 2011 (Continued)

NOTE 3 — FAIR VALUE MEASUREMENTS (Continued)

Other Intangible Assets – Other intangible assets consist of a core deposit intangible and acquired intangible assets arising from acquisitions, including non-compete agreements, trade names, carrier relationships and client/insured relationships. The valuation of other intangible assets is based on information and assumptions available to us at the time of acquisition, using income and market approaches to determine fair value. We test our other intangible assets annually for impairment, or when indications of potential impairment exist. Fair value measurements of other intangible assets use significant unobservable inputs. As such, we classify other intangible assets, which are subject to non-recurring fair value adjustments, as Level 3.

Stock Warrants – The fair value of stock warrants is determined by the Black-Scholes option pricing model. The expected stock volatility is based on historical volatility of our common stock over the expected term of the warrants. The expected life assumption is based on the contract term. The dividend yield of zero is based on the fact that we have no present intention to pay cash dividends. The risk free rate used for the warrant is equal to the zero coupon rate in effect at the time of the grant. As such, we classify stock warrants, which are subject to recurring fair value adjustments, as Level 3.

FASB ASC 320, “Investments – Debt and Equity Securities,” amended current other-than-temporary impairment (“OTTI”) guidance in GAAP for debt securities by requiring a write-down when fair value is below amortized cost in circumstances where: (1) an entity has the intent to sell a security; (2) it is more likely than not that an entity will be required to sell the security before recovery of its amortized cost basis; or (3) an entity does not expect to recover the entire amortized cost basis of the security. If an entity intends to sell a security or if it is more likely than not the entity will be required to sell the security before recovery, an OTTI write-down is recognized in earnings equal to the entire difference between the security’s amortized cost basis and its fair value. If an entity does not intend to sell the security or it is not more likely than not that it will be required to sell the security before recovery, the OTTI write-down is separated into an amount representing credit loss, which is recognized in earnings, and the amount related to all other factors, which is recognized in other comprehensive income. FASB ASC 320 did not amend existing recognition and measurement guidance related to OTTI write-downs of equity securities. FASB ASC 320 also extended disclosure requirements about debt and equity securities to interim reporting periods. FASB ASC 320 does not require disclosures for earlier periods presented for comparative purposes at initial adoption. In periods after initial adoption, FASB ASC 320 requires comparative disclosures only for periods ending after initial adoption.

FASB ASC 820 defines fair value as the exchange price that would be received for an asset or paid to transfer a liability (an exit price) in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. FASB ASC 820 also establishes a three-level fair value hierarchy that requires an entity to maximize the use of observable inputs and minimize the use of unobservable inputs when measuring fair value. The three levels of inputs that may be used to measure fair value are defined as follows: