Registration Statement Specified Transactions Form S 3

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As filed with the Securities and Exchange Commission on November 18, 2024

Registration No. 333-

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form S-3

REGISTRATION STATEMENT

UNDER

THE SECURITIES ACT OF 1933

FLUSHING FINANCIAL CORPORATION

(Exact name of each registrant as specified in its certificate of incorporation)

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220 RXR Plaza

Uniondale, New York 11556

(718) 961-5400

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

John R. Buran

Chief Executive Officer

Flushing Financial Corporation

220 RXR Plaza

Uniondale, New York 11556

(718) 961-5400

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

Copy to:

Gary J. Simon

Hughes Hubbard & Reed LLP

One Battery Park Plaza

New York, New York 10004

(212) 837-6770

Approximate date of commencement of proposed sale to the public: From time to time after this registration statement becomes effective.

If the only securities being registered on this Form are being offered pursuant to dividend or interest reinvestment plans, please check the following box. ☐

If any of the securities being registered on this Form are to be offered on a delayed or continuous basis pursuant to Rule 415 under the Securities Act of 1933, other than securities offered only in connection with dividend or interest reinvestment plans, 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, please 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 post-effective amendment filed pursuant to Rule 462(c) under the Securities Act, check the following box and list the Securities Act registration number of the earlier effective registration statement for the same offering. ☐

If this Form is a registration statement pursuant to General Instruction I.D. or a post-effective amendment thereto that shall become effective upon filing with the Commission pursuant to Rule 462(e) under the Securities Act, check the following box. ☐

If this Form is a post-effective amendment to a registration statement filed pursuant to General Instruction I.D. filed to register additional securities or additional classes of securities pursuant to Rule 413(b) under the Securities Act, check the following box. ☐

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.

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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 Securities Act. ☐

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.

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The information in this prospectus is not complete and may be changed. A registration statement relating to these securities has been filed with the Securities and Exchange Commission and has not yet been declared effective. The securities may not be sold until the registration statement has been declared effective. This prospectus is not an offer to sell these securities and it is not soliciting an offer to buy these securities in any state where the offer or sale is not permitted.

SUBJECT TO COMPLETION, DATED NOVEMBER 18, 2024

PROSPECTUS

FLUSHING FINANCIAL CORPORATION

$400,000,000

Debt Securities

Preferred Stock

Depository Shares

Common Stock

Warrants

Units

These securities may be offered and sold from time to time by us in one or more offerings, up to a total dollar amount of $400,000,000 (or the equivalent in foreign currency or currency units). We will provide the specific terms of these securities in supplements to this prospectus. You should read this prospectus and the applicable prospectus supplement carefully before you invest in these securities. This prospectus may not be used to sell securities unless accompanied by the applicable prospectus supplement and a pricing supplement, if any.

Flushing Financial Corporation's common stock is traded on the NASDAQ Global Select Market under the symbol "FFIC."

Investing in the securities involves certain risks. See " Risk Factors " beginning on page 6 of this prospectus and on page 44 of our annual report on Form 10-K for the year ended December 31, 2023, which is incorporated herein by reference, as well as any risk factors included in, or incorporated by reference into, the applicable prospectus supplement, to read about factors you should consider before buying any of our securities.

These securities have not been approved or disapproved by the Securities and Exchange Commission or any state securities commission nor have these organizations determined if this prospectus is truthful or complete. Any representation to the contrary is a criminal offense.

We may offer and sell the securities directly, through agents, dealers or underwriters as designated from time to time, or through a combination of these methods.

These securities are not savings accounts, deposits or other obligations of any bank. These securities are not insured by the Federal Deposit Insurance Corporation or any other governmental agency.

The date of this prospectus is , 2024.

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In this prospectus, unless the context indicates otherwise, references to the "Holding Company" "we," "our" and "us" refer to the activities and the assets and liabilities of Flushing Financial Corporation, including its subsidiaries.

CAUTIONARY STATEMENT REGARDING FORWARD-LOOKING INFORMATION

This prospectus and other publicly available documents, including the documents incorporated herein by reference, may include and our representatives may from time to time make projections and statements which may constitute "forward-looking statements" within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements are based on current expectations, estimates and projections about our business and management's beliefs and assumptions. Forward-looking statements are typically identified by words such as "believe," "expect," "anticipate," "intend," "target," "estimate," "continue," "positions," "projections," "goals," "prospects" or "potential," by future conditional verbs such as "will," "would," "should," "could," or "may," or by variations of such words or by similar expressions. These statements are not guarantees of future performance and involve certain risks, uncertainties and assumptions ("Future Factors") which are difficult to predict. Therefore, actual outcomes and results may differ materially from what is expressed or forecasted in such forward-looking statements. Forward-looking statements speak only as of the date they are made and we assume no duty to update forward-looking statements.

Future Factors include that:

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These are representative of the Future Factors that could affect the outcome of the forward-looking statements. In addition, such statements could be affected by general industry and market conditions and growth rates, general economic and political conditions, either nationally or in the states in which Flushing and its subsidiaries do business, including interest rate and currency exchange rate fluctuations, changes and trends in the securities markets, and other Future Factors.

ABOUT THIS DOCUMENT

This prospectus is part of a registration statement that we filed with the Securities and Exchange Commission (the "SEC") utilizing a "shelf" registration process. The prospectus does not contain all information included in the registration statement. You may review a copy of the registration statement at the SEC's Public Reference Room as well as through the SEC's internet site, as described below. Under this shelf registration process, we may offer and sell the securities identified in this prospectus. Each time we offer and sell securities, we will provide a prospectus supplement that will contain information about the terms of the offering and the securities being offered and, if necessary, a pricing supplement that will contain the specific terms of your securities. The prospectus supplement and, if necessary, the pricing supplement, may also add, update or change information contained in this prospectus. Any information contained in this prospectus will be deemed to be modified or superseded by any inconsistent information contained in a prospectus supplement or a pricing supplement. You should read carefully this prospectus and any prospectus supplement and pricing supplement, together with the additional information described below under "Where You Can Find More Information."

WHERE YOU CAN FIND MORE INFORMATION

We file annual, quarterly and current reports, proxy statements and other information with the SEC. Our SEC filings are available to the public at the SEC's web site at http://www.sec.gov.

In this prospectus, as permitted by law, we "incorporate by reference" information from other documents that we file with the SEC. This means that we can disclose important information to you by referring you to those documents. The information incorporated by reference is considered to be a part of this prospectus and should be read with the same care. When we update the information contained in documents that have been incorporated by reference by making future filings with the SEC, the information incorporated by reference in this prospectus is considered to be automatically updated and superseded. In other words, in case of a conflict or inconsistency between information contained in this prospectus and information incorporated by reference into this prospectus, you should rely on the information contained in the document that was filed later.

We incorporate by reference the documents listed below and any documents we file with the SEC in the future under Section 13(a), 13(c), 14, or 15(d) of the Securities Exchange Act of 1934 (other than those portions that may be "furnished" and not filed with the SEC) until our offering is completed:

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You may request a copy of any of these filings, other than an exhibit to a filing unless that exhibit is specifically incorporated by reference into that filing, at no cost, by writing to or telephoning us at the following address:

Flushing Financial Corporation
220 RXR Plaza
Uniondale, New York 11556
(718) 961-5400

ABOUT FLUSHING FINANCIAL CORPORATION

Flushing Financial Corporation is a Delaware corporation and is registered as a financial holding company under the Bank Holding Company Act of 1956, as amended. The principal executive offices of Flushing are located at 220 RXR Plaza, Uniondale, New York 11556. The telephone number for Flushing is (718) 961-5400.

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RISK FACTORS

Investing in our securities involves certain risks. Before you invest in any of our securities, in addition to the other information included in, or incorporated by reference into, this prospectus, you should carefully consider the risk factors contained in Item 1 under the caption "Risk Factors" and elsewhere in our annual report on Form 10-K for the fiscal year ended December 31, 2023, which is incorporated into this prospectus by reference, as updated by our annual or quarterly reports for subsequent fiscal years or fiscal quarters that we file with the SEC and that are so incorporated. See "Where You Can Find More Information" for information about how to obtain a copy of these documents. You should also carefully consider the risks and other information that may be contained in, or incorporated by reference into, any prospectus supplement relating to specific offerings of securities.

USE OF PROCEEDS

We intend to use the net proceeds from the sale of any securities offered under this prospectus as set forth in the applicable prospectus supplement.

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DESCRIPTION OF CAPITAL STOCK

The following summary discusses the material terms of our capital stock. This description is a summary only and not meant to be complete but is qualified in its entirety by reference to the relevant provisions of the General Corporation Law of the State of Delaware (the "DGCL"), charter and amended and restated bylaws. For more detailed information, you should refer to our charter and amended and restated bylaws, which we have filed with the SEC and are incorporating by reference herein, and the DGCL.

Our charter provides that we may issue up to 105,000,000 shares of capital stock, consisting of 100,000,000 shares of common stock, par value $0.01 per share, and 5,000,000 shares of preferred stock, par value $0.01 per share. There were 29,068,903 shares of our common stock outstanding as of October 31, 2024. There currently are no other classes or series of preferred stock authorized or outstanding.

We are a Delaware corporation governed by the DGCL. Under Delaware law, stockholders generally are not responsible for a corporation's debts or obligations.

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DESCRIPTION OF COMMON STOCK

Each stockholder is entitled to one vote for each share of common stock held on all matters submitted to a vote of stockholders. There is no cumulative voting for election of directors. In uncontested elections, director nominees must be elected by the majority of votes cast at the annual meeting of stockholders. Incumbent directors who fail to receive a majority of votes - and who would otherwise remain in office until a successor is elected under Delaware law - are required to offer a letter of resignation for consideration by the Board of Directors. Plurality voting applies if the number of nominees exceeds the number of open director positions.

Holders of our common stock vote together as a single class, except as otherwise provided by law. Holders of shares of our common stock have no preemptive rights, conversion rights or other subscription rights. There are no redemption or sinking fund provisions applicable to the common stock. All shares of common stock will, when issued, be fully paid and non-assessable.

Dividends

Subject to the DGCL and the rights of holders of any outstanding preferred stock, holders of our common stock will be entitled to share dividends equally, share for share.

Certain Effects of Authorized but Unissued Stock

We have shares of common stock and preferred stock available for future issuance without stockholder approval. We may utilize these additional shares for a variety of corporate purposes, including future public offerings to raise additional capital, facilitating corporate acquisitions or paying a dividend on the capital stock.

The existence of unissued and unreserved common stock and preferred stock may enable the Board of Directors to issue shares to persons friendly to current management or to issue preferred stock with terms that could render more difficult or discourage a third party attempt to obtain control of our company by means of a merger, tender offer, proxy contest or otherwise, thereby protecting the continuity of our management. In addition, if we issue preferred stock, the issuance could adversely affect the voting power of holders of common stock and the likelihood that such holders will receive dividend payments and payments upon liquidation.

Certain Provisions Affecting Change in Control

Certain provisions of our certificate of incorporation and bylaws, the Bank's New York State charter and bylaws, certain federal regulations and provisions of Delaware corporation law, and certain provisions of remuneration plans and agreements applicable to employees and officers of the Bank may have anti-takeover effects by discouraging potential proxy contests and other takeover attempts, particularly those which have not been negotiated with the Board of Directors. Applicable regulatory restrictions may also prevent or inhibit the acquisition of a controlling position in our common stock and may prevent or inhibit takeover attempts that certain stockholders may deem to be in their or other stockholders' interest or in our interest, or in which stockholders may receive a substantial premium for their shares over then current market prices. These provisions may also increase the cost of, and thus discourage, any such future acquisition or attempted acquisition, and would render the removal of our current Board of Directors or management more difficult.

Transfer Agent and Registrar

Computershare Trust Company, N.A., P.O. Box 30170, College Station, TX 77842-3170, is the transfer agent and registrar of our common stock.

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DESCRIPTION OF PREFERRED STOCK

The following summary contains a description of the general terms of the preferred stock that we may issue. The specific terms of any series of preferred stock will be described in the prospectus supplement relating to that series of preferred stock. The terms of any series of preferred stock may differ from the terms described below. Certain provisions of the preferred stock described below and in any prospectus supplement are not complete. You should refer to the amendment to our Certificate of Incorporation or the Certificate of Designation, with respect to the establishment of a series of preferred stock which would be filed with the SEC in connection with the offering of such series of preferred stock.

Our Certificate of Incorporation permits our board of directors to authorize the issuance of up to 5,000,000 shares of preferred stock, par value $0.01, in one or more series, without stockholder action. The board of directors can fix the voting powers (if any) and designations, preferences and relative, participating, optional or of the special rights of each series. Therefore, without stockholder approval, our board of directors can authorize the issuance of preferred stock with voting, dividend, liquidation and conversion and other rights that could dilute the voting power of the common stock and may assist management in impeding any unfriendly takeover or attempted change in control. No preferred stock is currently outstanding.

The preferred stock has the terms described below unless otherwise provided in the prospectus supplement relating to a particular series of the preferred stock. You should read the prospectus supplement relating to the particular series of the preferred stock being offered for specific terms, including:

The preferred stock will, when issued, be fully paid and non-assessable. Unless otherwise specified in the prospectus supplement, each series of the preferred stock will rank equally as to dividends and liquidation rights in all respects with each other series of preferred stock. The rights of holders of shares of each series of preferred stock will be subordinate to those of our general creditors.

As described under "Description of Depositary Shares," we may, at our option, with respect to any series of the preferred stock, elect to offer fractional interests in shares of preferred stock, and provide for the issuance of depositary receipts representing depositary shares, each of which will represent a fractional interest in a share of the series of the preferred stock. The fractional interest will be specified in the prospectus supplement relating to a particular series of the preferred stock.

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Rank

Any series of the preferred stock will, with respect to the priority of the payment of dividends and the priority of payments upon liquidation, winding up, and dissolution, rank:

Dividends

Holders of the preferred stock of each series will be entitled to receive, when, as, and if declared by our board of directors, cash dividends at such rates and on such dates described, if any, in the prospectus supplement. Different series of preferred stock may be entitled to dividends at different rates or based on different methods of calculation. The dividend rate may be fixed or variable or both. Dividends will be payable to the holders of record as they appear on our stock books on record dates fixed by our board of directors, as specified in the applicable prospectus supplement.

Dividends on any series of the preferred stock may be cumulative or noncumulative, as described in the applicable prospectus supplement. If our board of directors does not declare a dividend payable on a dividend payment date on any series of noncumulative preferred stock, then the holders of that noncumulative preferred stock will have no right to receive a dividend for that dividend payment date, and we will have no obligation to pay the dividend accrued for that period, whether or not dividends on that series are declared payable on any future dividend payment dates. Dividends on any series of cumulative preferred stock will accrue from the date we initially issue shares of such series or such other date specified in the applicable prospectus supplement.

Our ability to pay dividends on our preferred stock is subject to policies established by the Federal Reserve Board.

Rights Upon Liquidation

If we dissolve, liquidate, or wind up our affairs, either voluntarily or involuntarily, the holders of each series of preferred stock will be entitled to receive, before any payment or distribution of assets is made to holders of junior securities, liquidating distributions in the amount described in the prospectus supplement relating to that series of the preferred stock. If the amounts payable with respect to the preferred stock of any series and any other parity securities are not paid in full, the holders of the preferred stock of that series and of the parity securities will share proportionately in the distribution of our assets in proportion to the full liquidation preferences to which they are entitled. After the holders of preferred stock and the parity securities are paid in full, they will have no right or claim to any of our remaining assets.

Because we are a bank holding company, our rights, the rights of our creditors and of our stockholders, including the holders of the preferred stock offered by this prospectus, to participate in the assets of any subsidiary upon the subsidiary's liquidation or recapitalization may be subject to the prior claims of the subsidiary's creditors except to the extent that we may ourselves be a creditor with recognized claims against the subsidiary.

Redemption

We may provide that a series of the preferred stock may be redeemable, in whole or in part, at our option, with prior Federal Reserve Board approval, if required. In addition, a series of preferred stock may be subject to mandatory redemption pursuant to a sinking fund or otherwise. The redemption provisions that may apply to a series of preferred

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stock, including the redemption dates and the redemption prices for that series, will be described in the prospectus supplement.

In the event of partial redemptions of preferred stock, whether by mandatory or optional redemption, our board of directors will determine the method for selecting the shares to be redeemed, which may be by lot or pro rata or by any other method determined to be equitable.

On or after a redemption date, unless we default on the payment of the redemption price, dividends will cease to accrue on shares of preferred stock called for redemption. In addition, all rights of holders of the shares will terminate except for the right to receive the redemption price.

Unless otherwise specified in the applicable prospectus supplement for any series of preferred stock, if any dividends on any other series of preferred stock ranking equally as to payment of dividends and liquidation rights with such series of preferred stock are in arrears, no shares of any such series of preferred stock may be redeemed, whether by mandatory or optional redemption, unless all shares of preferred stock are redeemed, and we will not purchase any shares of such series of preferred stock. This requirement, however, will not prevent us from acquiring such shares pursuant to a purchase or exchange offer made on the same terms to holders of all such shares outstanding.

Under current regulations, bank holding companies, except in certain narrowly defined circumstances, may not exercise any option to redeem shares of preferred stock included as Tier 1 capital without the prior approval of the Federal Reserve Board. Ordinarily, the Federal Reserve Board would not permit such a redemption unless (1) the shares are redeemed with the proceeds of a sale by the bank holding company of common stock or perpetual preferred stock, or (2) the Federal Reserve Board determines that the bank holding company's condition and circumstances warrant the reduction of a source of permanent capital.

Voting Rights

Unless otherwise described in the applicable prospectus supplement, holders of the preferred stock will have no voting rights except as otherwise required by law or in our Amended and Restated Certificate of Incorporation.

Under regulations adopted by the Federal Reserve Board, if the holders of any series of the preferred stock are or become entitled to vote for the election of directors, such series may then be deemed a "class of voting securities" and a holder of 25% or more of such series, or a holder of 5% or more if it otherwise exercises a "controlling influence" over us, may then be subject to regulation as a bank holding company in accordance with the Bank Holding Company Act. In addition, at such time as such series is deemed a class of voting securities, (a) any other bank holding company may be required to obtain the approval of the Federal Reserve Board to acquire or retain 5% or more of that series; and (b) any person other than a bank holding company may be required to obtain the approval of the Federal Reserve Board to acquire or retain 10% or more of that series.

Exchangeability

We may provide that the holders of shares of preferred stock of any series may be required at any time or at maturity to exchange those shares for our debt securities. The applicable prospectus supplement will specify the terms of any such exchange.

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DESCRIPTION OF DEBT SECURITIES

We may offer unsecured debt securities which may be senior, subordinated or junior subordinated, and which may be convertible. Unless otherwise specified in the applicable prospectus supplement, our debt securities will be issued in one or more series under an indenture to be entered into between us and a trustee to be selected. The forms of both the senior and subordinated indentures are exhibits to the registration statement of which this prospectus forms a part.

The following description briefly sets forth certain general terms and provisions of the debt securities and does not purport to be complete. The particular terms of the debt securities offered by any prospectus supplement and the extent, if any, to which these general provisions may apply to the debt securities, will be described in the related prospectus supplement. Accordingly, for a description of the terms of a particular issue of debt securities, you must refer to both the related prospectus supplement and to the following description. If any particular terms of such debt securities described in a prospectus supplement differ from any of the terms of the debt securities generally described in this prospectus, then the terms described in the applicable prospectus supplement will supersede the terms described in this prospectus.

Debt Securities

The debt securities may be issued in one or more series as may be authorized from time to time. Reference is made to the applicable prospectus supplement for the following terms of the debt securities (if applicable):

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General

One or more series of debt securities may be sold at a substantial discount below their stated principal amount, bearing no interest or interest at a rate which at the time of issuance is below market rates. One or more series of debt securities may be variable rate debt securities that may be exchanged for fixed rate debt securities.

We will describe the U.S. federal income tax consequences and special considerations, if any, applicable to any such series in the applicable prospectus supplement.

Debt securities may be issued where the amount of principal and/or interest payable is determined by reference to one or more currency exchange rates, commodity prices, equity indices or other factors. Holders of such securities may receive a principal amount or a payment of interest that is greater than or less than the amount of principal or interest otherwise payable on such dates, depending upon the value of the applicable currencies, commodities, equity indices or other factors. Information as to the methods for determining the amount of principal or interest, if any, payable on any date, the currencies, commodities, equity indices or other factors to which the amount payable on such date is linked and certain additional U.S. federal income tax considerations will be set forth in the applicable prospectus supplement.

The term "debt securities" includes debt securities denominated in U.S. dollars or, if specified in the applicable prospectus supplement, in any other freely transferable currency or units based on or relating to foreign currencies.

Subject to the limitations provided in the indenture and in the prospectus supplement, you may transfer or exchange debt securities that we issue in registered form at our corporate office or the principal corporate trust office of the trustee, without the payment of any service charge, other than any tax or other governmental charge payable in connection therewith.

Global Securities

We may issue the debt securities of a series in whole or in part in the form of one or more global securities that we will deposit with, or on behalf of, a depositary identified in the applicable prospectus supplement relating thereto. We will issue global securities in registered form and in either temporary or definitive form. Unless and until it is exchanged in whole or in part for the individual debt securities, a global security may not be transferred except as a whole by the depositary for such global security to a nominee of such depositary or by a nominee of such depositary to such depositary or another nominee of such depositary or by such depositary, or any such nominee to a successor of such depositary or a nominee of such successor. We will describe the specific terms of the depositary arrangement with respect to any debt securities of a series and the rights of and limitations upon owners of beneficial interests in a global security in the applicable prospectus supplement.

Payment and Paying Agents

Unless otherwise indicated in the applicable prospectus supplement, payment of interest on a debt security on any interest payment date will be made to the person in whose name such debt security (or one or more predecessor debt securities) is registered at the close of business on the regular record date for such interest.

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Unless otherwise indicated in the applicable prospectus supplement, principal of and any premium and interest on the debt securities of a particular series will be payable at the office of a paying agent or paying agents as we may designate for such purpose from time to time, except that at our option payment of any interest may be made by check mailed to the address of the person entitled to such interest as such address appears in the security register. Unless otherwise indicated in the applicable prospectus supplement, we will designate the corporate trust office of the trustee in the City of New York as our sole paying agent for payments with respect to debt securities of each series. Any other paying agents initially designated by us for the debt securities of a particular series will be named in the applicable prospectus supplement. We may at any time designate debt securities additional paying agents or rescind the designation of any paying agent or approve a change in the office through which any paying agent acts, except that we will be required to maintain a paying agent in each place of payment for the debt securities of a particular series.

All moneys or United States government obligations (including proceeds thereof) deposited by us with the trustee or any paying agent for the payment of the principal of or any premium or interest on any debt security which remain unclaimed at the end of two years after such principal, premium or interest has become due and payable will be repaid to us, and after repayment to us, you are entitled to seek payment only from us as a general unsecured creditor.

Consolidation, Merger and Sale of Assets

The indenture will provide that we will not consolidate with or merge into any other person or convey, transfer or lease substantially all of our properties to any person, and no person may consolidate with or merge into us unless (a) the successor is organized under the laws of the United States or any state or the District of Columbia, and the successor expressly assumes our obligations under the indenture and the debt securities, (b) immediately after giving effect to the transaction, no Event of Default, and no event which, after notice or lapse of time, or both would become an Event of Default, shall have occurred and be continuing, and (c) certain other conditions as prescribed in the indenture are met.

The general provisions of the indenture do not afford holders of the debt securities protection in the event of a highly leveraged or other transaction that we may become involved in that may adversely affect holders of the debt securities.

Events of Default

Each of the following will constitute an event of default under the indenture with respect to debt securities of any series:

An Event of Default for a particular series of debt securities does not necessarily constitute an Event of Default for any other series of debt securities issued under the indenture. If an Event of Default relating to the payment of interest, principal or any sinking fund installment involving any series of debt securities has occurred and is continuing, either the trustee or the holders of not less than 25% in aggregate principal amount of the outstanding debt securities of that series by notice as provided in the indenture may declare the principal amount of the debt securities of that series

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(or, in the case of any debt security that is an original issue discount security or the principal amount of which is not then determinable, such portion of the principal amount of such debt security, or such other amount in lieu of such principal amount, as may be specified in the terms of such debt security) to be due and payable immediately.

If an Event of Default relating to the performance of other covenants occurs and is continuing for a period of 90 days after notice of such, or if any other Event of Default occurs and is continuing involving all of the series of senior debt securities, then the trustee or the holders of not less than 25% in aggregate principal amount of all of the series of senior debt securities outstanding may declare the entire principal amount of all of the series of senior debt securities due and payable immediately.

Similarly, if an Event of Default relating to the performance of other covenants occurs and is continuing for a period of 90 days after notice of such, or if any other Event of Default occurs and is continuing involving all of the series of subordinated debt securities, then the trustee or the holders of not less than 25% in aggregate principal amount of all of the series of subordinated debt securities outstanding may declare the entire principal amount of all of the series of subordinated debt securities due and payable immediately.

If, however, the Event of Default relating to the performance of other covenants or any other Event of Default that has occurred and is continuing is for less than all of the series of senior debt securities or subordinated debt securities, as the case may be, then, the trustee or the holders of not less than 25% in aggregate principal amount of each affected series of the senior debt securities or the subordinated debt securities, as the case may be, may declare the entire principal amount of all debt securities of such affected series due and payable immediately.

If an Event of Default described in clause (e) above with respect to the debt securities of any series at the time outstanding shall occur, the principal amount of all the debt securities of that series (or, in the case of any such original issue discount security or other debt security, such specified amount) will automatically, and without any action by the trustee or any holder, become immediately due and payable. After any such acceleration, but before a judgment or decree based on acceleration, the holders of a majority in aggregate principal amount of the outstanding debt securities of that series may, under certain circumstances, rescind and annul such acceleration if all Events of Default, other than the non-payment of accelerated principal (or other specified amount), have been cured or waived as provided in the indenture. For information as to waiver of defaults, see "Modification and Waiver".

Subject to the provisions of the indenture relating to the duties of the trustee in case an Event of Default shall occur and be continuing, the trustee will be under no obligation to exercise any of its rights or powers under the indenture at the request or direction of any of the holders, unless such holders shall have offered to the trustee reasonable indemnity. Subject to such provisions for the indemnification of the trustee, the holders of a majority in aggregate principal amount of the outstanding debt securities of any series will have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee or exercising any trust or power conferred on the trustee with respect to the debt securities of that series.

No holder of a debt security of any series will have any right to institute any proceeding with respect to the indenture, or for the appointment of a receiver or a trustee, or for any other remedy thereunder, unless, among other bases, (a) such holder has previously given to the trustee written notice of a continuing Event of Default with respect to the debt securities of that series, (b) the holders of at least 25% in aggregate principal amount of the outstanding debt securities of that series have made written request, and such holder or holders have offered reasonable indemnity, to the trustee to institute such proceeding as trustee and (c) the trustee has failed to institute such proceeding, and has not received from the holders of a majority in aggregate principal amount of the outstanding debt securities of that series a direction inconsistent with such request, within 60 days after such notice, request and offer. However, such limitations do not apply to a suit instituted by a holder of a debt security for the enforcement of payment of the principal of or any premium or interest on such debt security on or after the applicable due date specified in such debt security.

We will be required to furnish to the trustee annually a statement by certain of our officers as to whether or not we, to our knowledge, are in default in the performance or observance of any of the terms, provisions and conditions of the indenture and, if so, specifying all such known defaults.

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Modification and Waiver

Modifications and amendments of the indenture may be made by us and the trustee with the consent of the holders of a majority in aggregate principal amount of the outstanding debt securities of each series of senior or subordinated debt securities, as the case may be, affected by such modification or amendment; provided, however, that no such modification or amendment may, without the consent of the holder of each outstanding debt security affected,

The holders of a majority in principal amount of the outstanding debt securities of any series may waive compliance by us with certain restrictive provisions of the indenture. The holders of a majority in principal amount of the outstanding debt securities of any series may waive any past default under the indenture, except a default in the payment of principal, premium or interest or certain covenants and provisions of the indenture which cannot be amended without the consent of the holder of each outstanding debt security of such series affected.

The indenture will provide that in determining whether the holders of the requisite principal amount of the outstanding debt securities have given or taken any direction, notice, consent, waiver or other action under the indenture as of any date, (a) the principal amount of an original issue discount security that will be deemed to be outstanding will be the amount of the principal thereof that would be due and payable as of such date upon acceleration of the maturity to such date, (b) if, as of such date, the principal amount payable at the stated maturity of a debt security is not determinable (for example, because it is based on an index), the principal amount of such debt security deemed to be outstanding as of such date will be an amount determined in the manner prescribed for such debt security and (c) the principal amount of a debt security denominated in one or more foreign currencies or currency units that will be deemed to be outstanding will be the U.S. dollar equivalent, determined as of such date in the manner prescribed for such debt security, of the principal amount of such debt security (or, in the case of a debt security described in clause (a) or (b) above, of the amount described in such clause). Certain debt securities, including those for whose payment or redemption money has been deposited or set aside in trust for the holders and those that have been fully defeased pursuant to the indenture, will not be deemed to be outstanding.

Except in certain limited circumstances, we will be entitled to set any day as a record date for the purpose of determining the holders of outstanding debt securities of any series entitled to give or take any direction, notice, consent, waiver or other action under the indenture, in the manner and subject to the limitations provided in the indenture. In certain limited circumstances, the trustee will be entitled to set a record date for action by holders. If a record date is set

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for any action to be taken by holders of a particular series, such action may be taken only by persons who are holders of outstanding debt securities of that series on the record date. To be effective, such action must be taken by holders of the requisite principal amount of such debt securities within a specified period following the record date. For any particular record date, this period will be 180 days or such other period as may be specified by us (or the trustee, if it set the record date), and may be shortened or lengthened (but not beyond 180 days) from time to time.

Defeasance and Covenant Defeasance

If and to the extent indicated in the applicable prospectus supplement, we may elect, at our option at any time, to have provisions relating to defeasance and discharge of indebtedness or relating to defeasance of certain restrictive covenants applied to the debt securities of any series, or to any specified part of a series.

Defeasance and Discharge. The indenture may provide that upon our exercise of our option (if any) we will be discharged from all our obligations (and, if applicable, provisions relating to subordination will cease to be effective) with respect to debt securities (except for certain obligations to exchange or register the transfer of debt securities, to replace stolen, lost or mutilated debt securities, to maintain paying agencies and to hold moneys for payment in trust) upon the deposit in trust for the benefit of the holders of such debt securities of money or United States government obligations, or both, which, through the payment of principal and interest in respect thereof in accordance with their terms, will provide money in an amount sufficient to pay the principal of and any premium and interest on such debt securities on the respective stated maturities in accordance with the terms of the indenture and such debt securities. Such defeasance or discharge may occur only if, among other things, we have delivered to the trustee an opinion of counsel to the effect that we have received from, or there has been published by, the United States Internal Revenue Service a ruling, or there has been a change in tax law, in either case to the effect that holders of such debt securities will not recognize gain or loss for federal income tax purposes as a result of such deposit, defeasance and discharge and will be subject to federal income tax on the same amount, in the same manner and at the same times as would have been the case if such deposit, defeasance and discharge were not to occur.

Defeasance of Certain Covenants. The indenture also may provide that, upon our exercise of our option (if any) we may omit to comply with certain restrictive covenants of the indenture and any that may be described in the applicable prospectus supplement, and the occurrence of certain Events of Default, which are described above in clause (d) under "Events of Default" and any that may be described in the applicable prospectus supplement, will be deemed not to be or result in an Event of Default, in each case with respect to such debt securities. We, in order to exercise such option, will be required to deposit, in trust for the benefit of the holders of such debt securities, money or United States government obligations, or both, which, through the payment of principal and interest in respect thereof in accordance with their terms, will provide money in an amount sufficient to pay the principal of and any premium and interest on such debt securities on the respective stated maturities in accordance with the terms of the indenture and such debt securities. We will also be required, among other things, to deliver to the trustee an opinion of counsel to the effect that holders of such debt securities will not recognize gain or loss for federal income tax purposes as a result of such deposit and defeasance of certain obligations and will be subject to federal income tax on the same amount, in the same manner and at the same times as would have been the case if such deposit and defeasance were not to occur. In the event we exercised this option with respect to any debt securities and such debt securities were declared due and payable because of the occurrence of any Event of Default, the amount of money and United States government obligations so deposited in trust would be sufficient to pay amounts due on such debt securities at the time of their respective stated maturities but may not be sufficient to pay amounts due on such debt securities upon any acceleration resulting from such Event of Default. In such case, we would remain liable for such payments.

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DESCRIPTION OF DEPOSITARY SHARES

General

We may, at our option, elect to offer fractional shares of preferred stock, which we call depositary shares, rather than full shares of preferred stock. If we do, we will issue public receipts, called depositary receipts, for depositary shares, each of which will represent a fraction, to be described in the prospectus supplement, of a share of a particular series of preferred stock.

The shares of any series of preferred stock represented by depositary shares will be deposited with a depositary named in the prospectus supplement. Unless otherwise provided in the prospectus supplement, each owner of a depositary share will be entitled, in proportion to the applicable fractional interest in a share of preferred stock represented by the depositary share, to all the rights and preferences of the preferred stock represented by the depositary share. Those rights include dividend, voting, redemption, conversion and liquidation rights.

Dividends and Other Distributions

The depositary will distribute all cash dividends or other cash distributions received in respect of the preferred stock to the record holders of depositary shares in proportion to the numbers of depositary shares owned by those holders.

If there is a distribution other than in cash, the depositary will distribute property received by it to the record holders of depositary shares, unless the depositary determines that it is not feasible to make the distribution. If this occurs, the depositary may, with our approval, sell the property and distribute the net proceeds from the sale to the holders.

Withdrawal of Stock

Unless the related depositary shares have been previously called for redemption, upon surrender of the depositary receipts at the office of the depositary, the holder of the depositary shares will be entitled to delivery, at the office of the depositary, or upon his or her order, of the number of whole shares of the preferred stock and any money or other property represented by the depositary shares. If the depositary receipts delivered by the holder evidence a number of depositary shares in excess of the number of depositary shares representing the number of whole shares of preferred stock to be withdrawn, the depositary will deliver to the holder at the same time a new depositary receipt evidencing the excess number of depositary shares. In no event will the depositary deliver fractional shares of preferred stock upon surrender of depositary receipts.

Redemption of Depositary Shares

Whenever we redeem shares of preferred stock held by the depositary, the depositary will redeem as of the same redemption date the number of depositary shares representing shares of the preferred stock so redeemed, so long as we have paid in full to the depositary the redemption price of the preferred stock to be redeemed, plus an amount equal to any accumulated and unpaid dividends on the preferred stock to the date fixed for redemption. The redemption price per depositary share will be equal to the redemption price and any other amounts per share payable on the preferred stock multiplied by the fraction of a share of preferred stock represented by one depositary share. If fewer than all the depositary shares are to be redeemed, the depositary shares to be redeemed will be selected by lot or pro rata or by any other equitable method as may be determined by the depositary.

After the date fixed for redemption, depositary shares called for redemption will no longer be deemed to be outstanding and all rights of the holders of depositary shares will cease, except the right to receive the moneys payable upon redemption and any money or other property to which the holders of the depositary shares were entitled upon redemption upon surrender to the depositary of the depositary receipts evidencing the depositary shares.

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Voting the Preferred Stock

Upon receipt of notice of any meeting at which the holders of the preferred stock are entitled to vote, the depositary will mail the information contained in the notice of meeting to the record holders of the depositary receipts relating to that preferred stock. The record date for the depositary receipts relating to the preferred stock will be the same date as the record date for the preferred stock. Each record holder of the depositary shares on the record date will be entitled to instruct the depositary as to the exercise of the voting rights pertaining to the number of shares of preferred stock represented by that holder's depositary shares. The depositary will endeavor, insofar as practicable, to vote the number of shares of preferred stock represented by the depositary shares in accordance with those instructions, and we will agree to take all action which may be deemed necessary by the depositary in order to enable the depositary to do so. The depositary will not vote any shares of preferred stock except to the extent that it receives specific instructions from the holders of depositary shares representing that number of shares of preferred stock.

Charges of Depositary

We will pay all transfer and other taxes and governmental charges arising solely from the existence of the depositary arrangements. We will pay charges of the depositary in connection with the initial deposit of the preferred stock and any redemption of the preferred stock. Holders of depositary receipts will pay other transfer and other taxes and governmental charges and such other charges as are expressly provided in the deposit agreement to be for their accounts.

Resignation and Removal of Depositary

The depositary may resign at any time by delivering to us notice of its election to do so, and we may remove the depositary at any time. Any resignation or removal of the depositary will take effect upon our appointment of a successor depositary and its acceptance of such appointment. The successor depositary must be appointed within 60 days after delivery of the notice of resignation or removal and must be a bank or trust company having its principal office in the United States and having a combined capital and surplus of at least $50,000,000.

Notices

The depositary will forward to holders of depositary receipts all notices, reports and other communications, including proxy solicitation materials received from us, that are delivered to the depositary and that we are required to furnish to the holders of the preferred stock.

Limitation of Liability

Neither we nor the depositary will be liable if either of us is prevented or delayed by law or any circumstance beyond our control in performing our obligations. Our obligations and those of the depositary will be limited to performance in good faith of our and their duties thereunder. We and the depositary will not be obligated to prosecute or defend any legal proceeding in respect of any depositary shares or preferred stock unless satisfactory indemnity is furnished. We and the depositary may rely, upon written advice of counsel or accountants, on information provided by persons presenting preferred stock for deposit, holders of depositary receipts or other persons believed to be competent and on documents believed to be genuine.

Inspection of Books

Any record holder of depositary shares who has been a holder for at least six months or who holds at least five percent of our outstanding shares of capital stock will be entitled to inspect the transfer books relating to the depositary shares and the list of record holders of depositary shares upon certification to the depositary that the holder is acting in good faith and that the inspection is for a proper purpose.

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DESCRIPTION OF WARRANTS

We may issue warrants to purchase debt securities, preferred stock, depositary shares or common stock. We may offer warrants separately or together with one or more additional warrants, debt securities, preferred stock, depositary shares or common stock, or any combination of those securities in the form of units, as described in the appropriate prospectus supplement. If we issue warrants as part of a unit, the accompanying prospectus supplement will specify whether those warrants may be separated from the other securities in the unit prior to the warrants' expiration date. Below is a description of certain general terms and provisions of the warrants that we may offer. Further terms of the warrants will be described in the prospectus supplement.

The applicable prospectus supplement will contain, where applicable, the following terms of and other information relating to the warrants:

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DESCRIPTION OF UNITS

The following description, together with the additional information we include in any applicable prospectus supplement, summarizes the general features of the units that we may offer under this prospectus. We may issue units consisting of two or more other constituent securities. These units may be issuable as, and for a specified period of time may be transferable only as a single security, rather than as the separate constituent securities comprising such units. While the features we have summarized below will generally apply to any units we may offer under this prospectus, we will describe the particular terms of any units that we may offer in more detail in the applicable prospectus supplement. The specific terms of any units may differ from the description provided below as a result of negotiations with third parties in connection with the issuance of those units, as well as for other reasons. Because the terms of any units we offer under a prospectus supplement may differ from the terms we describe below, you should rely solely on information in the applicable prospectus supplement if that summary is different from the summary in this prospectus.

We urge you to read the applicable prospectus supplement related to the specific units being offered, as well as the complete instruments that contain the terms of the securities that comprise those units. Certain of those instruments, or forms of those instruments, have been or will be filed as exhibits to the registration statement of which this prospectus is a part, and supplements to those instruments or forms may be incorporated by reference into the registration statement of which this prospectus is a part from reports we file with the Commission.

If we offer any units, certain terms of that series of units will be described in the applicable prospectus supplement, including, without limitation, the following, as applicable:

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PLAN OF DISTRIBUTION

We may offer and sell these securities in any one or more of the following ways:

The distribution of the securities may be effected from time to time in one or more transactions:

Each time we sell securities, a prospectus supplement will describe the method of distribution of the securities and any applicable restrictions.

The prospectus supplement with respect to the securities of a particular series will describe the terms of the offering of the securities, including the following:

We may agree to enter into an agreement to indemnify the agents and the several underwriters against certain civil liabilities, including liabilities under the Securities Act or to contribute to payments the agents or the underwriters may be required to make.

If so indicated in the applicable prospectus supplement, we will authorize underwriters or other persons acting as our agents to solicit offers by certain institutions to purchase debt securities from us pursuant to delayed delivery contracts providing for payment and delivery on the date stated in the prospectus supplement. Each contract will be for an amount not less than, and the aggregate amount of securities sold pursuant to those contracts will be equal to, the respective amounts stated in the prospectus supplement. Institutions with which the contracts, when authorized, may be made include commercial and savings banks, insurance companies, pension funds, investment companies, educational and charitable institutions and other institutions, but will in all cases be subject to our approval. Delayed delivery contracts will not be subject to any conditions, except that:

The underwriters and other persons acting as our agents will not have any responsibility in respect of the validity or performance of delayed delivery contracts.

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If underwriters or dealers are used in the sale, the securities will be acquired by the underwriters or dealers for their own account and may be resold from time to time in one or more transactions, at a fixed price or prices, which may be changed, or at market prices prevailing at the time of sale, or at prices related to such prevailing market prices, or at negotiated prices. The securities may be offered to the public either through underwriting syndicates represented by one or more managing underwriters or directly by one or more of such firms. Unless otherwise set forth in the prospectus supplement, the obligations of underwriters or dealers to purchase the securities offered will be subject to certain conditions precedent, and the underwriters or dealers will be obligated to purchase all the offered securities if any are purchased. Any public offering price and any discounts or concessions allowed or re-allowed or paid by underwriters or dealers to other dealers may be changed from time to time.

The securities may be sold directly by us or through agents designated by us from time to time. Any agent involved in the offer or sale of the securities in respect of which this prospectus is delivered will be named, and any commission payable by us to such agent will be set forth, in the prospectus supplement. Unless otherwise indicated in the prospectus supplement, any such agent will be acting on a best efforts basis for the period of its appointment.

To the extent that we make sales to or through one or more underwriters or agents in at-the-market offerings, we will do so pursuant to the terms of a distribution agreement between us and the underwriters or agents. If we engage in at-the-market sales pursuant to a distribution agreement, we will issue and sell shares of our common stock to or through one or more underwriters or agents, which may act on an agency basis or on a principal basis. During the term of any such agreement, we may sell shares on a daily basis in exchange transactions or otherwise as we agree with the underwriters or agents. The distribution agreement will provide that any shares of our common stock sold will be sold at prices related to the then prevailing market prices for our common stock. Therefore, exact figures regarding proceeds that will be raised or commissions to be paid cannot be determined at this time and will be described in a prospectus supplement. Pursuant to the terms of the distribution agreement, we also may agree to sell, and the relevant underwriters or agents may agree to solicit offers to purchase, blocks of our common stock or other securities. The terms of each such distribution agreement will be set forth in more detail in a prospectus supplement to this prospectus. In the event that any underwriter or agent acts as principal, or broker-dealer acts as underwriter, it may engage in certain transactions that stabilize, maintain or otherwise affect the price of our securities. We will describe any such activities in the prospectus supplement relating to the transaction.

Offers to purchase the securities offered by this prospectus may be solicited, and sales of the securities may be made, by us of those securities directly to institutional investors or others, who may be deemed to be underwriters within the meaning of the Securities Act with respect to any resales of the securities. The terms of any offer made in this manner will be included in the prospectus supplement relating to the offer.

If indicated in the applicable prospectus supplement, we will authorize underwriters, dealers or agents to solicit offers by certain institutional investors to purchase securities from us pursuant to contracts providing for payment and delivery at a future date. Institutional investors with which these contracts may be made include, among others:

In all cases, these purchasers must be approved by us. Unless otherwise set forth in the applicable prospectus supplement, the obligations of any purchaser under any of these contracts will not be subject to any conditions except that (a) the purchase of the securities must not at the time of delivery be prohibited under the laws of any jurisdiction to which that purchaser is subject, and (b) if the securities are also being sold to underwriters, we must have sold to these underwriters the securities not subject to delayed delivery. Underwriters and other agents will not have any responsibility in respect of the validity or performance of these contracts.

Subject to any restrictions relating to debt securities in bearer form, any securities initially sold outside the United States may be resold in the United States through underwriters, dealers or otherwise.

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Each series of securities other than common stock will be a new issue of securities with no established trading market. Any underwriters to whom offered securities are sold by us for public offering and sale may make a market in such securities, but such underwriters will not be obligated to do so and may discontinue any market making at any time.

The anticipated date of delivery of the securities offered by this prospectus will be described in the applicable prospectus supplement relating to the offering. The securities offered by this prospectus may or may not be listed on a national securities exchange or a foreign securities exchange. No assurance can be given as to the liquidity or activity of any trading in the offered securities.

If more than 10% of the net proceeds of any offering of securities made under this prospectus will be received by Financial Industry Regulatory Authority ("FINRA") members participating in the offering or affiliates or associated persons of such FINRA members, the offering will be conducted in accordance with FINRA Conduct Rule 2710.

We may enter into derivative or other hedging transactions with financial institutions. These financial institutions may in turn engage in sales of our common stock to hedge their positions, deliver this prospectus in connection with some or all of those sales, and use the shares covered by this prospectus to close out any short position created in connection with those sales. We may also sell shares of our common stock short using this prospectus and deliver our common stock covered by this prospectus to close out such short positions, or loan or pledge our common stock to financial institutions that in turn may sell the shares of our common stock using this prospectus. We may pledge or grant a security interest in some or all of our common stock covered by this prospectus to support a derivative or hedging position or other obligations and, if we default in the performance of our obligations, the pledges or secured parties may offer and sell our common stock from time to time pursuant to this prospectus.

We also may enter into derivative transactions with third parties, or sell securities not covered by this prospectus to third parties in privately negotiated transactions. If the applicable prospectus supplement indicates, in connection with those derivatives, the third parties may sell securities covered by this prospectus and the applicable prospectus supplement, including in short sale transactions. If so, the third party may use securities pledged by us or borrowed from us or others to settle those sales or to close out any related open borrowings of stock, and may use securities received from us in settlement of those derivatives to close out any related open borrowings of stock. The third party in such sale transactions will be an underwriter and, if not identified in this prospectus, will be identified in the applicable prospectus supplement (or a post-effective amendment). In addition, we may otherwise loan or pledge securities to a financial institution or other third party that in turn may sell the securities short using this prospectus. Such financial institution or other third party may transfer its economic short position to investors in our securities or in connection with a concurrent offering of other securities.

Certain of the underwriters and their associates and affiliates may in the ordinary course of business be customers of, have borrowing relationships with, engage in other transactions with, and/or perform services, including investment banking services, for, us or one or more of our affiliates.

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VALIDITY OF SECURITIES

The validity of the securities may be passed upon for us by Hughes Hubbard & Reed LLP, or by counsel named in the applicable prospectus supplement, and for any underwriters or agents by counsel selected by such underwriters or agents.

EXPERTS

The consolidated financial statements of Flushing Financial Corporation as of December 31, 2023 and 2022 and for each of the three years in the period ended December 31, 2023 and management's assessment of the effectiveness of internal control over financial reporting as of December 31, 2023 incorporated by reference in this prospectus and in the registration statement have been so incorporated in reliance on the reports of BDO USA, P.C., an independent registered public accounting firm, given on the authority of said firm as experts in auditing and accounting.

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FLUSHING FINANCIAL CORPORATION

$400,000,000

DEBT SECURITIES

PREFERRED STOCK

DEPOSITORY SHARES

COMMON STOCK

WARRANTS

UNITS

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PROSPECTUS

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, 2024

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PART II

INFORMATION NOT REQUIRED IN PROSPECTUS

ITEM 14. OTHER EXPENSES OF ISSUANCE AND DISTRIBUTION.

The following is an itemized statement of the estimated fees and expenses in connection with the offering of the securities registered hereunder.

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ITEM 15. INDEMNIFICATION OF DIRECTORS AND OFFICERS

Section 145 of the Delaware General Corporation Law (the "DGCL") empowers a Delaware corporation to indemnify any person who was or is a party or is threatened to be made a party to any threatened, pending or completed action, suit or proceeding, whether civil, criminal, administrative or investigative (other than an action by or in the right of the corporation) by reason of the fact that such person is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation, partnership, joint venture, trust or other enterprise, against expenses (including attorneys' fees), judgments, fines and amounts paid in settlement actually and reasonably incurred by such person in connection with such action, suit or proceeding if such person acted in good faith and in a manner such person reasonably believed to be in or not opposed to the best interests of the corporation, and, with respect to any criminal action or proceeding, had no reasonable cause to believe his or her conduct was unlawful. Similar indemnification is authorized for such person against expenses (including attorneys' fees) actually and reasonably incurred in connection with the defense or settlement of any threatened, pending or completed action or suit by or in the right of the corporation if such person acted in good faith and in a manner he or she reasonably believed to be in or not opposed to the best interests of the corporation, and provided further that (unless a court of competent jurisdiction otherwise provides) he shall not have been adjudged liable to the corporation. Any such indemnification (unless ordered by a court) may be made by the corporation only as authorized in each specific case by the corporation upon a determination that indemnification of the present or former director, officer, employee or agent is proper because such person has met the applicable standard of conduct, which indemnification shall be made in the case of a director or officer at the time of the determination by the shareholders, a majority vote of disinterested directors, a committee of disinterested directors or by independent legal counsel in a written opinion, if there are no such directors or if such directors so direct.

Section 145 of the DGCL also authorizes a corporation to pay the expenses (including attorneys' fees) incurred by an officer or director in defending any such proceedings in advance of their final disposition. Such advance payment of expenses, however, may be made only upon delivery to the corporation by the indemnified party of an undertaking to repay all amounts so advanced if it shall ultimately be determined that the person receiving such payments is not entitled to be indemnified pursuant to Section 145 of the DGCL. The DGCL also provides that its provisions regarding indemnification and advancement of expenses are not exclusive of other rights which may be provided by bylaw, agreement, or otherwise.

Section 145 of the DGCL further authorizes a corporation to purchase and maintain insurance, at its expense, on behalf of any person who is or was a director, officer, employee or agent of the corporation, or is or was serving at the request of the corporation as a director, officer, employee or agent of another corporation or enterprise, against any

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liability asserted against or incurred by such person in any such capacity, or arising out of such status, whether or not the corporation would otherwise have the power to indemnify such person against such liability under Section 145 of the DGCL.

Article TENTH of our Certificate of Incorporation limits the personal liability of directors in specified circumstances and sets forth circumstances under which our directors, officers, employees and agents may be indemnified against liability which they incur in their capacities as such. Article TENTH provides as follows:

TENTH.

The rights and authority conferred in this Article TENTH shall not be exclusive of any other right which any person may have or hereafter acquire under any statute, provision of this Certificate of Incorporation or the By-Laws of the Corporation, agreement, vote of stockholders or disinterested directors or otherwise.

Notwithstanding anything to the contrary contained in this Article TENTH, the Corporation shall not indemnify any person in connection with any Proceeding initiated by such person against any other person or entity other than the Corporation or any Subsidiary unless such Proceeding was authorized by the Board of Directors of the Corporation.

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Neither the amendment nor repeal of this Article TENTH, nor the adoption of any provision of the Certificate of Incorporation or By-Laws or of any statute inconsistent with this Article TENTH, shall eliminate or reduce the effect of this Article TENTH in respect of any acts or omissions occurring prior to such amendment, repeal or adoption of an inconsistent provision.

We have entered into Indemnity Agreements with each of our directors and executive officers, which provide for mandatory indemnification for each such person to the full extent permitted by law against judgments, fines, amounts paid in settlement in connection with any claim arising out of such person's service to us unless he was adjudicated to have acted in bad faith, deliberate dishonesty or for personal gain. The agreements provide for advancement of expenses and specify procedures for determining entitlement to indemnification in a particular case.

We maintain insurance coverage under which our officers and directors are indemnified under certain circumstances with respect to litigation and other costs and liabilities arising out of actual or alleged misconduct of such officers and directors.

For the undertaking with respect to indemnification, see Item 17 in this registration statement.

ITEM 16. EXHIBITS.

The exhibits filed (unless otherwise noted) as a part of this registration statement are set forth in the accompanying Exhibit Index.

ITEM 17. UNDERTAKINGS.

Each of the undersigned registrants hereby undertakes:

(i) To include any prospectus required by section 10(a)(3) of the Securities Act of 1933;

(ii) To reflect in the prospectus any facts or events arising after the effective date of this registration statement (or the most recent post-effective amendment thereof) which, individually or in the aggregate, represent a fundamental change in the information set forth in this registration statement. Notwithstanding the foregoing, any increase or decrease in volume of securities offered (if the total dollar value of securities offered would not exceed that which was registered) and any deviation from the low or high end of the estimated maximum offering range may be reflected in the form of prospectus filed with the Commission pursuant to Rule 424(b) if, in the aggregate, the changes in volume and price represent no more than 20 percent change in the maximum aggregate offering price set forth in the "Calculation of Registration Fee" table in the effective registration statement; and

(iii) To include any material information with respect to the plan of distribution not previously disclosed in this registration statement or any material change to such information in this registration statement;

provided, however, that paragraphs (1)(i), (1)(ii) and (1)(iii) above do not apply if the information required to be included in a post-effective amendment by those paragraphs is contained in reports filed with or furnished to the SEC by the registrant pursuant to Section 13 or Section 15(d) of the Securities Exchange Act of 1934 that are incorporated by reference in the registration statement, or is contained in a form of prospectus filed pursuant to Rule 424(b) that is part of the registration statement.

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(i)Each prospectus filed by the registrant pursuant to Rule 424(b)(3) shall be deemed to be part of the registration statement as of the date the filed prospectus was deemed part of and included in the registration statement; and

(ii) Each prospectus required to be filed pursuant to Rule 424(b)(2), (b)(5), or (b)(7) as part of a registration statement in reliance on Rule 430B relating to an offering made pursuant to Rule 415(a)(1)(i), (vii), or (x) for the purpose of providing the information required by section 10(a) of the Securities Act of 1933 shall be deemed to be part of and included in the registration statement as of the earlier of the date such form of prospectus is first used after effectiveness or the date of the first contract of sale of securities in the offering described in the prospectus. As provided in Rule 430B, for liability purposes of the issuer and any person that is at that date an underwriter, such date shall be deemed to be a new effective date of the registration statement relating to the securities in the registration statement to which that prospectus relates, and the offering of such securities at that time shall be deemed to be the initial bona fide offering thereof. Provided, however , that no statement made in a registration statement or prospectus that is part of the registration statement or made in a document incorporated or deemed incorporated by reference into the registration statement or prospectus that is part of the registration statement will, as to a purchaser with a time of contract of sale prior to such effective date, supersede or modify any statement that was made in the registration statement or prospectus that was part of the registration statement or made in any such document immediately prior to such effective date.

(i) Any preliminary prospectus or prospectus of such undersigned registrant relating to the offering required to be filed pursuant to Rule 424;

(ii) Any free writing prospectus relating to the offering prepared by or on behalf of such undersigned registrant or used or referred to by such undersigned registrant;

(iii) The portion of any other free writing prospectus relating to the offering containing material information about such undersigned registrant or its securities provided by or on behalf of such undersigned registrant; and

(iv) Any other communication that is an offer in the offering made by such undersigned registrant to the purchaser.

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SIGNATURES

Pursuant to the requirements of the Securities Act of 1933, the undersigned registrant certifies that it has reasonable grounds to believe that it meets all of the requirements for filing on Form S-3 and has duly caused this registration statement to be signed on its behalf by the undersigned, thereunto duly authorized, in Uniondale, New York on November 18, 2024.

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We the undersigned directors and/or officers of Flushing Financial Corporation, a corporation organized under the laws of the State of Delaware (the "Corporation"), hereby constitute and appoint John R. Buran, Susan K. Cullen and Maria A. Grasso, and each of them (with full power to each of them to act alone), his or her true and lawful attorneys-in-fact and agents with full power of substitution and re-substitution, for him or her and on his or her behalf and in his or her name, place and stead, in any and all capacities, to sign, execute and to affix his or her seal to and file with the Securities and Exchange Commission (or any other governmental or regulatory authority) a registration statement (the "Registration Statement") on Form S-3 or any other appropriate form, and any and all amendments (including post-effective amendments) thereto, with all exhibits and any and all documents required to be filed with respect thereto, relating to the registration under the Securities Act of 1933, as amended (the "Securities Act"), and pursuant to Rule 415 thereunder, of (i) the Corporation's debt securities, (ii) shares of the Corporation's common stock, (iii) shares of the Corporation's preferred stock, (iv) warrants for the purchase of such debt securities, common stock, preferred stock, or (v) depository shares (described below), plus (i) an indeterminate number of shares of such common stock issuable (A) upon conversion of shares of such preferred stock, to the extent any of such shares of preferred stock are by their terms convertible into such common stock or (B) upon exercise of such warrants, (ii) an indeterminate number of shares of such preferred stock (A) in the form of depository shares to be evidenced by depository receipts to be issued pursuant to a deposit agreement and (B) upon exercise of Warrants and (iii) an indeterminate amount of such debt securities issuable upon exercise of such warrants; and in connection with any and all amendments to the Registration Statement and all instruments necessary or in connection therewith, including to sign the Registration Statement and any and all amendments and supplements relating thereto (including stickers and post-effective amendments), in the name and on behalf of the Corporation and in the name and on behalf of such officer or director of the Corporation, to sign any and all additional registration statements relating to the same offering of securities as the Registration Statement that are filed pursuant to Rule 462(b) under the Securities Act, to attest to the seal of the Corporation thereon, and to file the same, with all exhibits thereto, and other documents in connection therewith, with the Securities and Exchange Commission and any applicable securities exchange or securities self-regulatory organization, hereby granting to such attorneys-in-fact and agents, each acting alone, the full power and authority to do and perform every act and thing requisite, necessary or advisable to be done in and about the premises, as fully and to all intents and purposes as any such officer or director might or could do in person; and such persons are authorized to take or cause to be taken any and all such further actions in connection therewith in the name and on behalf of the Corporation as they, in their sole discretion, deem necessary or appropriate; and each of the undersigned hereby ratifies and confirms all that any said attorney-in-fact and agent, or any substitute, lawfully does or causes to be done by virtue hereof.

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Pursuant to the requirements of the Securities Act of 1933, this registration statement has been signed by the following persons and in the capacities indicated on November 18, 2024.

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EXHIBIT INDEX

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