Transcode Therapeutics, Inc.

​

6 Liberty Square, #2382

Boston, MA 02109

PROXY STATEMENT

FOR THE 2025 ANNUAL MEETING OF STOCKHOLDERS

TO BE HELD AUGUST 29, 2025

This Proxy Statement contains information about the 2025 Annual Meeting of Stockholders (the “Annual Meeting”) of TransCode Therapeutics, Inc. The Annual Meeting will be held virtually, at 9:30 a.m. Eastern Time. In this Proxy Statement, the terms “TransCode Therapeutics,” “TransCode,” the “Company,” “we,” “us,” and “our” refer to TransCode Therapeutics, Inc. The mailing address of our principal executive office is TransCode Therapeutics, Inc., 6 Liberty Square, #2382, Boston, MA 02109 USA.

All properly submitted proxies will be voted in accordance with the instructions contained in those proxies. If no instructions are specified, the proxies will be voted in accordance with the recommendation of our Board of Directors (the “Board”) with respect to each of the matters set forth in the accompanying Notice of the 2025 Annual Meeting of Stockholders. You may revoke your proxy at any time before it is exercised at the Annual Meeting by written notice to that effect to our corporate secretary.

We first mailed this Proxy Statement and the proxy card to our stockholders on or about July 15, 2025. Our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, (the “2024 Annual Report”) was filed with the Securities and Exchange Commission (“SEC”) on April 15, 2025, and our amended Annual Report on Form 10-K/A for the fiscal year ended December 31, 2024 (the “2024 Amended Annual Report”) was filed with the SEC on April 30, 2025, and except for exhibits, are available at https://ir.transcodetherapeutics.com/annual-meeting or, without charge to any stockholder, by written request to TransCode.

We are an “emerging growth company” under applicable federal securities laws and therefore permitted to conform with certain reduced public company reporting requirements. As an emerging growth company, we provide in this Proxy Statement the scaled disclosure permitted under the Jumpstart Our Business Startups Act of 2012, including the compensation disclosures required of a “smaller reporting company,” as that term is defined in Rule 12b-2 promulgated under the Securities Exchange Act of 1934, as amended (the “Exchange Act”). In addition, as an emerging growth company, we are not required to conduct votes seeking approval, on an advisory basis, of the compensation of our named executive officers or the frequency with which such votes must be conducted or required to provide pay versus performance disclosure under Item 402(v) of Regulation S-K. We will remain an “emerging growth company” until the earliest of (i) the last day of the fiscal year following the fifth anniversary of our July 2021 initial public offering; (ii) the last day of the fiscal year in which our total annual gross revenue is equal to or more than $1.235 billion; (iii) the date on which we have issued more than $1 billion in nonconvertible debt during the previous three years; or (iv) the date on which we are deemed to be a large accelerated filer under the rules of the SEC. Even after we are no longer an “emerging growth company,” we may remain a “smaller reporting company.”

Adjustment for Reverse Stock Split. All common stock share data and exercise price data for applicable common stock equivalents included in this Proxy Statement have been retroactively adjusted to reflect the reverse stock split we effected May 15, 2025.

Important Notice Regarding the Availability of Proxy Materials for

the Annual Meeting of Stockholders of TransCode Therapeutics, Inc. to be Held on August 29, 2025:

This Proxy Statement and the proxy card are first being mailed to our stockholders on or about July 15, 2025. In accordance with the rules of the SEC, we are advising our stockholders of the availability on the Internet of our proxy materials related to our upcoming Annual Meeting. Because we have elected to utilize the “full set delivery” option, we are delivering to all stockholders paper copies of all our proxy materials, as well as providing access to those proxy materials on a publicly accessible website. This Proxy Statement, our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, and our amended Annual Report on Form 10-K/A for the fiscal year ended December 31, 2024, are available to our stockholders athttps://ir.transcodetherapeutics.com/annual-meeting.

A copy of our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, as filed with the SEC, and a copy our amended Annual Report on Form 10-K/A for the fiscal year ended December 31, 2024, as filed with the SEC, except for exhibits, will be furnished without charge to any of our stockholders upon written request to TransCode Therapeutics, Inc., 6 Liberty Square, #2382, Boston, MA 02109 USA, Attention: Corporate Secretary. This Proxy Statement, our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, and our amended Annual Report on Form 10-K/A for the fiscal year ended December 31, 2024 are also available on the SEC’s website atwww.sec.gov.

TRANSCODE THERAPEUTICS, INC

PROXY STATEMENT

FOR THE 2025 ANNUAL MEETING OF STOCKHOLDERS

GENERAL INFORMATION

When are this Proxy Statement and the accompanying materials scheduled to be sent to stockholders?

This Proxy Statement and the proxy card are first being mailed to our stockholders on or about July 15, 2025. In accordance with SEC rules, we are advising our stockholders of the availability on the Internet of our proxy materials related to our upcoming Annual Meeting. Because we have elected to utilize the “full set delivery” option, we are delivering to all stockholders paper copies of all the proxy materials, as well as providing access to those proxy materials on a publicly accessible website. This Proxy Statement, our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, and our amended Annual Report on Form 10-K/A for the fiscal year ended December 31, 2024, are available to our stockholders at https://ir.transcodetherapeutics.com/annual-meeting.

Who is soliciting my vote?

Our Board is soliciting your vote for the Annual Meeting. We have also engaged Saratoga Proxy Consulting, LLC (“Saratoga”), a proxy solicitation firm, who may solicit proxies on the Board’s behalf.

We expect to pay Saratoga a fee of $20,000 in the aggregate, plus reasonable out-of-pocket expenses incurred in the process of soliciting proxies. In addition, we have agreed to indemnify Saratoga and certain related persons against certain liabilities arising out of or in connection with the engagement. Saratoga may solicit proxies by mail, telephone, facsimile or e-mail.

When is the Record Date for the Annual Meeting?

The record date for determination of stockholders entitled to vote at the Annual Meeting is the close of business on July 11, 2025 (the “Record Date”).

Who is entitled to vote at the Annual Meeting and how many votes can be cast?

Stockholders of record at the close of business on the Record Date may vote at the Annual Meeting. There were 833,683 shares of Common Stock outstanding on the Record Date.

Pursuant to the rights of our stockholders contained in our governing documents, each share of our Common Stock is entitled to one vote on all matters listed in this Proxy Statement.

Why is the Annual Meeting a virtual, online meeting?

The Annual Meeting will be a virtual meeting of stockholders where stockholders will participate by accessing a website using the Internet. There will not be a physical meeting location. We believe that hosting a virtual meeting will facilitate stockholder attendance and participation at the Annual Meeting by enabling stockholders to participate remotely from any location around the world. Our virtual meeting will be governed by our Rules of Conduct and Procedures which will be posted at www.proxyvote.com in advance of the meeting and will available during the online meeting at www.virtualshareholdermeeting.com/RNAZ2025.

We have designed the Special Meeting to provide the same rights and opportunities to participate as stockholders have at an in-person meeting, including the right to vote and ask questions through the virtual meeting platform.

How do I attend the Annual Meeting?

We will host the Annual Meeting live online. The webcast of the Annual Meeting will start at 9:30 a.m., Eastern Time, on August 29, 2025. Online access to the webcast will open fifteen (15) minutes prior to the start of the Annual Meeting to allow time for you to log-in and test your device’s audio system. To be admitted to the Annual Meeting, you will need to log-in at www.virtualshareholdermeeting.com/RNAZ2025 using the 16-digit control number on your proxy card or voting instruction form.

Beginning fifteen (15) minutes prior to, and during, the Annual Meeting, we will have technicians standing by and ready to assist you with any technical difficulties you may have accessing or hearing the virtual meeting. If you encounter any difficulties accessing the virtual meeting or during the virtual meeting, please call the technical support team at the phone number available on www.virtualshareholdermeeting.com/RNAZ2025.

How may I vote?

Stockholders of record may vote by any of the methods described below:

•

By Internet. Access the website of the Company’s vote tabulator, Broadridge, at: www.proxyvote.com, using the voter control number printed on the proxy card furnished to you. Your shares will be voted in accordance with your instructions. You must specify how you want your shares voted or your Internet vote cannot be completed and you will receive an error message. If you vote on the Internet, you may also request electronic delivery of future proxy materials.

​

•

By Telephone. Call 1-800-690-6903 toll-free from the U.S., U.S. territories and Canada, and follow the instructions on the proxy card. Your shares will be voted in accordance with your instructions. You must specify how you want your shares voted or your telephone vote cannot be completed.

​

•

By Mail. Complete and mail a proxy card in the enclosed postage prepaid envelope to Broadridge. Your proxy will be voted in accordance with your instructions. If you return your proxy card but do not specify how you want your shares voted on any particular matter, they will be voted in accordance with the recommendations of our Board. If you are mailed or otherwise receive or obtain a proxy card or voting instruction form, and you choose to vote by telephone or by Internet, you do not have to return your proxy card or voting instruction form.

​

•

During the Annual Meeting. You may vote during the virtual meeting through www.virtualshareholdermeeting.com/RNAZ2025. To be admitted to the Annual Meeting and vote your shares, you must provide the control number as described in the proxy card mailed to you.

​

•

Deadline for Voting. Votes submitted through the Internet, or by telephone or U.S. mail must be received by 11:59 p.m. Eastern Time, August 28, 2025.

​

If the Annual Meeting is adjourned or postponed, the deadline above may be extended.

If you are a beneficial owner of shares held by your broker, bank or other nominee in “street name,” you should have received a voting instruction form with these proxy materials from your broker, bank or other nominee rather than from us. The voting deadlines and availability of telephone and Internet voting for beneficial owners of shares will depend on the voting processes of the broker, bank or other nominee that holds your shares. Therefore, we urge you to carefully review and follow the voting instruction form and any other materials that you receive from that organization. If you hold your shares of TransCode Common Stock in multiple accounts, you should vote your shares as described in each set of proxy materials you receive.

If you submit a proxy without giving voting instructions, your shares will be voted in the manner recommended by the Board on all matters presented in this Proxy Statement, and as the person(s) named as proxies in the proxy card may determine in their discretion with respect to any other matters properly presented at the Annual Meeting. You may also authorize another person or persons to act for you as your proxy in a writing, signed by you or your authorized representative, specifying the details of those proxies’ authority. The original writing must be given to each of the named proxies, although it may be sent to them by electronic transmission if, from that transmission, it can be determined that the transmission was authorized by you.

If any other matters are properly presented for consideration at the Annual Meeting, the persons named in your proxy and acting thereunder will have discretion to vote on those matters in accordance with their best judgment. We do not currently anticipate that any other matters will be raised at the Annual Meeting.

How will my shares be voted?

Your shares will be voted as you instruct so long as you designate your voting instructions. If you return a signed card, but do not provide voting instructions, your shares will be voted FOR each of the proposals.

How do I revoke my proxy?

If you are a stockholder of record, you may revoke your proxy by (1) submitting a new vote with a later date by Internet, telephone or U.S. mail using the procedures described in the “How do I Vote?” section above before the applicable deadline, (2) attending the Annual Meeting via the internet, or (3) by filing an instrument in writing revoking the proxy or by submitting to our corporate secretary another duly executed proxy bearing a later date. Any written notice of revocation or subsequent proxy card must be received by our corporate secretary prior to the taking of the vote at the Annual Meeting. Such written notice of revocation or subsequent proxy card should be hand-delivered to our corporate secretary or sent to our principal executive offices at TransCode Therapeutics, Inc., 6 Liberty Square, #2382, Boston, MA 02109 USA, Attention: Corporate Secretary.

If a broker, bank, or other nominee holds your shares, you must contact such broker, bank, or nominee in order to find out how to revoke your proxy or change your vote.

How is a quorum reached?

Our Amended and Restated Bylaws, as amended (the “Bylaws”), provide that the presence in person or represented by proxy of the holders of one-third in voting power of the outstanding shares of capital stock entitled to vote at the meeting, will constitute a quorum for the transaction of business at such meeting, including the Annual Meeting. We must have a quorum to conduct business at the Annual Meeting. Under the General Corporation Law of the State of Delaware, the state in which we are incorporated, shares that are voted “abstain” or “withheld” and broker “non-votes” are counted as present for purposes of determining whether a quorum is present at the Annual Meeting. If a quorum is not present, the Meeting may be adjourned until a quorum is obtained.

How is the vote counted?

Under our Bylaws, any proposal other than an election of directors is decided by a majority of the votes properly cast for or against such proposal, except where a larger vote is required by law or by our Amended and Restated Certificate of Incorporation, as amended, (the “Charter”) or by our Bylaws. Abstentions and broker “non-votes” are not included in the tabulation of the voting results on any such proposal and, therefore, do not have an impact on such proposals. A broker “non-vote” occurs when a nominee holding shares for a beneficial owner does not vote on a particular proposal because the nominee does not have discretionary voting power with respect to that proposal and has not received instructions from the beneficial owner about how to vote on that proposal.

If you are a beneficial owner of shares held in a brokerage account and you do not instruct your broker, bank or other agent how to vote your shares, your broker, bank or other agent may still be able to vote your shares in its discretion. Under the rules of the New York Stock Exchange, which are also applicable to Nasdaq-listed companies, brokers, banks and other securities intermediaries that are subject to New York Stock Exchange rules may use their discretion to vote your “uninstructed” shares on matters considered to be “routine” under New York Stock Exchange rules but not with respect to “non-routine” matters. A broker non-vote occurs when a broker, bank or other agent has not received voting instructions from the beneficial owner of the shares and the broker, bank or other agent cannot vote the shares because the matter is considered “non-routine” under New York Stock Exchange rules. Proposals 1 and 2 are considered “non-routine” under New York Stock Exchange rules such that your broker, bank or other agent may not vote your shares on those proposals without your voting instructions. Conversely, Proposals 3 and 4 are considered “routine” under New York Stock Exchange rules and thus, if you do not return voting instructions to your broker, your shares may be voted by your broker in its discretion on Proposals 3 and 4.

A summary of our Annual Meeting proposals and applicable vote standards is set forth below.

Proposal One: Election of directors for a one year term ending at the 2026 Annual Meeting of Stockholders. To be elected, the directors nominated via Proposal No. 1 must receive a plurality of the votes properly cast, meaning that the director nominees receiving the most votes will be elected. Shares voting “withheld” and broker non-votes have no effect on the election of directors.

Proposal Two: Plan Amendment. The approval of an amendment to the Company’s 2021 Stock Option and Incentive Plan to increase the number of shares available for issuance thereunder by 166,724 shares requires the affirmative vote of a majority of the votes properly cast on the proposal.

Proposal Three: Ratification of Auditors. Ratification of the appointment of WithumSmith+Brown, PC as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2025, requires the affirmative vote of a majority of the votes properly cast on the proposal.

Proposal Four: Adjournment. To approve a proposal to adjourn the Annual Meeting to a later date or dates, if necessary or appropriate, to permit further solicitation and vote of proxies in the event that there are insufficient votes for, or otherwise in connection with, the approval of Proposal 2.

Who pays the cost for soliciting proxies?

We are making this solicitation and will pay the entire cost of preparing and distributing our proxy materials and of soliciting votes. Our officers and employees may, without compensation other than their regular compensation, solicit proxies through further mailings, personal conversations, facsimile, e-mails, or otherwise.

We have also engaged Saratoga, a proxy solicitation firm, who may solicit proxies on the Board’s behalf.

We expect to pay Saratoga a fee of $20,000 in the aggregate, plus reasonable out-of-pocket expenses incurred in the process of soliciting proxies. In addition, we have agreed to indemnify Saratoga and certain related persons against certain liabilities arising out of or in connection with the engagement. Saratoga may solicit proxies by mail, telephone, facsimile or e-mail.

How may stockholders submit matters for consideration at an annual meeting?

The required notice must be in writing and received by our corporate secretary at our principal executive offices not less than 90 days nor more than 120 days prior to the first anniversary of the preceding year’s annual meeting. However, in the event that the date of the annual meeting is advanced by more than 30 days from the first anniversary of the preceding year’s annual meeting, or if no annual meeting was held in the preceding year, a stockholder’s notice must be so received no earlier than the 120th day prior to such annual meeting and not later than the close of business on the later of (A) the 90th day prior to such annual meeting and (B) the tenth day following the day on which notice of the date of such annual meeting was mailed or public disclosure of the date of such annual meeting was made, whichever first occurs.

In addition, any stockholder proposal intended to be included in the proxy statement for the next annual meeting of our stockholders to be held in 2026 must also satisfy the requirements of SEC Rule 14a-8 under the Exchange Act and be received not later than March 17, 2026. If the date of the annual meeting is moved by more than 30 days from the first anniversary of the previous year’s proxy statement, then notice must be received within a reasonable time before we begin to print and send proxy materials. If that happens, we will publicly announce the deadline for submitting a proposal in a press release or in a document filed with the SEC.

In addition, to comply with the SEC’s universal proxy rules, stockholders intending to solicit proxies in support of director nominees other than the Company’s nominees must provide notice that sets forth the information required by Rule 14a-19 under the Exchange Act no later than June 30, 2026.

How can I know the voting results?

We plan to announce preliminary voting results at the Annual Meeting and will publish final results in a Current Report on Form 8-K to be filed with the SEC within four business days following the Annual Meeting.