UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

SCHEDULE 14A

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant

Filed by a Party other than the Registrant

Check the appropriate box:

Preliminary Proxy Statement

Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

Definitive Proxy Statement

Definitive Additional Materials

Soliciting Material Pursuant to Rule 14a-12

FIRST KEYSTONE CORPORATION

(Exact name of registrant as specified in its Charter)

(Name of Person(s) Filing Proxy Statement if other than Registrant)

Payment of Filing Fee (check the appropriate box):

No fee required.

Fee paid previously with preliminary materials.

Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.


EXPLANATORY NOTE

First Keystone Corporation (the “Company”) is filing the attached proxy card as an amendment and supplement to the Definitive Proxy Statement on Schedule 14A that was filed with the U.S. Securities and Exchange Commission on April 18, 2024 (the “DEF 14A”), as the proxy card was incorrectly filed as a separate document in the original filing.

Please note that no changes have been made to the body of the Proxy Statement and that the following proxy card has been included in the proxy materials being mailed to the Company’s stockholders. This Form DEFA 14A is being filed solely to correct the EDGAR version of the DEF 14A to include the proxy card being sent to stockholders.


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Signature of Shareholder Date: Signature of Shareholder Date: Note: Please sign exactly as your name or names appear on this Proxy. When shares are held jointly, each holder should sign. When signing as executor, administrator, attorney, trustee or guardian, please give full title as such. If the signer is a corporation, please sign full corporate name by duly authorized officer, giving full title as such. If signer is a partnership, please sign in partnership name by authorized person. To change the address on your account, please check the box at right and indicate your new address in the address space above. Please note that changes to the registered name(s) on the account may not be submitted via this method. JOHN SMITH 1234 MAIN STREET APT. 203 NEW YORK, NY 10038 PROXY VOTING INSTRUCTIONS Please detach along perforated line and mail in the envelope provided IF you are not voting via the Internet. THE BOARD OF DIRECTORS RECOMMENDS A VOTE "FOR" ALL THE NOMINEES LISTED AND "FOR" PROPOSAL 2. PLEASE SIGN, DATE AND RETURN PROMPTLY IN THE ENCLOSED ENVELOPE. PLEASE MARK YOUR VOTE IN BLUE OR BLACK INK AS SHOWN HERE x 20330000000000001000 8 053024 COMPANY NUMBER ACCOUNT NUMBER ANNUAL MEETING OF SHAREHOLDERS OF FIRST KEYSTONE CORPORATION May 30, 2024 NOTICE OF INTERNET AVAILABILITY OF PROXY MATERIAL: The Notice of Meeting, Proxy Statement and Proxy Card are available at https://www.fkyscorp.com INSTRUCTIONS: To withhold authority to vote for any individual nominee(s), mark “FOR ALL EXCEPT” and fill in the circle next to each nominee you wish to withhold, as shown here: 1. Election of Directors: O Michael L. Jezewski O William E. Rinehart O David R. Saracino FOR ALL NOMINEES WITHHOLD AUTHORITY FOR ALL NOMINEES FOR ALL EXCEPT (See instructions below) NOMINEES: 2. To Ratify the selection of Baker Tilly US, LLP as the independent registered public accounting firm for the Corporation for the year ending December 31, 2024. 3. Other business which might come before the meeting. Shares represented by this proxy will be voted by the stockholder. If no such directions are indicated, the Proxies will have authority to vote FOR the Nominees Listed and FOR Proposal 2. In their discretion, the Proxies are authorized to vote upon such other business as may properly come before the meeting. FOR AGAINST ABSTAIN MARK “X” HERE IF YOU PLAN TO ATTEND THE MEETING. INTERNET - Access “www.voteproxy.com” and follow the on-screen instructions or scan the QR code with your smartphone. Have your proxy card available when you access the web page. Vote online until 11:59 PM EST the day before the meeting. MAIL - Sign, date and mail your proxy card in the envelope provided as soon as possible. IN PERSON - You may vote your shares in person by attending the Annual Meeting. GO GREEN - e-Consent makes it easy to go paperless. With e-Consent, you can quickly access your proxy material, statements and other eligible documents online, while reducing costs, clutter and paper waste. Enroll today via www.astfinancial.com to enjoy online access.

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0 ------------------ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ---------------- 14475 FIRST KEYSTONE CORPORATION Proxy Solicited by Board of Directors for Annual Meeting — May 30, 2024 Carmie Cleaver and Tina Gray, or any of them, each with the power of substitution, are hereby authorized to represent and vote the shares of the undersigned, with all the powers which the undersigned would possess if personally present, at the Annual Meeting of Stockholders of First Keystone Corporation to be held on May 30, 2024 or at any postponement or adjournment thereof. (Continued and to be signed on the reverse side) 1.1