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Form 8-K

sec.gov

8-K — TScan Therapeutics, Inc.

Accession: 0001193125-26-236862

Filed: 2026-05-22

Period: 2026-05-20

CIK: 0001783328

SIC: 2836 (BIOLOGICAL PRODUCTS (NO DIAGNOSTIC SUBSTANCES))

Item: Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

Item: Submission of Matters to a Vote of Security Holders

Item: Financial Statements and Exhibits

Documents

8-K — d43301d8k.htm (Primary)

EX-3.1 (d43301dex31.htm)

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8-K

8-K (Primary)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported) May 20, 2026

TSCAN THERAPEUTICS, INC.

(Exact name of registrant as specified in its charter)

Delaware

001-40603

82-5282075

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(I.R.S. Employer

Identification No.)

830 Winter Street,

Waltham, Massachusetts

02451

(Address of principal executive offices)

(Zip Code)

Registrant’s telephone number, including area code (857) 399-9500

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trade

Symbol(s)

Name of each exchange

on which registered

Voting Common Stock, $0.0001 par value per share

TCRX

The Nasdaq Global Market LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☒

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 13(a) of the Exchange Act. ☐

Item 5.03

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year

On May 20, 2026, TScan Therapeutics, Inc. (the “Company”) held its 2026 Annual Meeting of Stockholders (the “Annual Meeting”). As further described in Item 5.07 to this Current Report on Form 8-K, at the Annual Meeting, the Company’s stockholders approved an amendment to the Company’s Amended and Restated Certificate of Incorporation to increase the number of authorized shares of voting common stock from 300,000,000 to 600,000,000. On May 20, 2026, the Company filed a Certificate of Amendment to the Company’s Amended and Restated Certificate of Incorporation (the “Certificate of Amendment”) with the Secretary of State of the State of Delaware and the Certificate of Amendment became effective upon filing. The foregoing description does not purport to be complete and is qualified in its entirety by reference to the full text of the Certificate of Amendment, a copy of which is filed as Exhibit 3.1 to this Current Report on Form 8-K and incorporated herein by reference.

Item 5.07

Submission of Matters to a Vote of Security Holders.

On May 20, 2026, the Company held its Annual Meeting to consider and vote on the four proposals set forth below, each of which is described in greater detail in the Company’s Definitive Proxy Statement on Schedule 14A, which was filed with the U.S. Securities and Exchange Commission on April 17, 2026. The final voting results are set forth below.

Proposal No. 1 - Election of Class II Directors

The stockholders of the Company elected Katina Dorton, J.D., M.B.A. and R. Keith Woods as Class II directors, each to serve for a three-year term ending at the annual meeting of stockholders to be held in 2029 and until their successor has been duly elected and qualified or until their earlier resignation or removal. The results of the stockholders’ vote with respect to the election of the Class II directors were as follows:

Name

Votes

For

Votes

Withheld

Broker

Non-Votes

Katina Dorton, J.D., M.B.A.

19,665,447

4,508,811

15,247,179

R. Keith Woods

23,305,311

868,947

15,247,179

Proposal No. 2 - Ratification of Appointment of Independent Registered Public Accounting Firm

The stockholders of the Company ratified the selection of Deloitte & Touche LLP as the Company’s independent registered public accounting firm for the fiscal year ending December 31, 2026. The results of the stockholders’ vote with respect to such ratification were as follows:

Votes

For

Votes

Against

Abstain

Broker

Non-Votes

38,497,976

637,978

285,483

15,247,179

Proposal No. 3 - Approval of an Amendment to the Company’s Amended and Restated Certificate of Incorporation

The stockholders of the Company approved an amendment to the Company’s Amended and Restated Certificate of Incorporation to increase the number of authorized shares of voting common stock from 300,000,000 shares to 600,000,000 shares. The results of the stockholders’ vote with respect to such approval were as follows:

Votes

For

Votes

Against

Abstain

Broker

Non-Votes

35,913,605

3,177,381

330,451

15,247,179

Proposal No. 4 - Approval of a Proposal to Adjourn the Annual Meeting

Although Proposal No. 4 was deemed not necessary because there was a quorum present and there were sufficient proxies at the time of the Annual Meeting to approve Proposal No. 3, it was approved by the requisite vote as follows:

Votes

For

Votes

Against

Abstain

Broker

Non-Votes

21,897,635

2,007,636

268,987

15,247,179

No other matters were submitted to or voted on by the Company’s stockholders at the Annual Meeting.

Item 9.01

Financial Statements and Exhibits

3.1

Certificate of Amendment to the Amended and Restated Certificate of Incorporation of TScan Therapeutics, Inc.

104

Cover Page Interactive Data File (embedded within the Inline XBRL document).

SIGNATURE

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

TScan Therapeutics, Inc.

Date: May 22, 2026

By:

/s/ Gavin MacBeath

Gavin MacBeath

Chief Executive Officer

EX-3.1

EX-3.1

Filename: d43301dex31.htm · Sequence: 2

EX-3.1

Exhibit 3.1

CERTIFICATE OF AMENDMENT TO THE

AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION OF TSCAN THERAPEUTICS, INC

TScan Therapeutics, Inc. (the “Corporation”), a corporation duly organized and existing under the laws of the State of Delaware pursuant to

Section 242 of the General Corporation Law of the State of Delaware (the “DGCL”), hereby certifies as follows:

1.

The Amended and Restated Certificate of Incorporation, as heretofore amended, is hereby amended by replacing

the first paragraph of Article FOURTH in its entirety to read as follows:

“The total number of shares of all

classes of capital stock that the Corporation is authorized to issue is six hundred twenty million (620,000,000) shares, of which (i) six hundred million (600,000,000) shares shall be a class designated as voting common stock, par value $0.0001

per share (the “Voting Common Stock”), (ii) ten million (10,000,000) shares shall be a class designated as non-voting common stock, par value $0.0001 per share (the “Non-Voting Common Stock”), and (iii) ten

million (10,000,000) shares shall be a class designated as preferred stock, par value $0.0001 per share (“Preferred Stock”). Any reference to “Common Stock” issued by the Corporation in any contract, agreement or

otherwise to which the Corporation is a party, whether before or after the date of filing of this Certificate, shall refer to Voting Common Stock, unless specific reference is made to the Non-Voting Common

Stock.”

2.

The Board of Directors of the Corporation has adopted a resolution approving and declaring advisable the

foregoing amendment set forth in this Certificate of Amendment in accordance with the provisions of Section 242 of the DGCL.

3.

The stockholders of the Corporation, at a meeting duly called and held pursuant to Section 222 of the

DGCL, duly adopted the amendments set forth in this Certificate of Amendment in accordance with the provisions of Section 242 of the DGCL.

4.

The foregoing amendments were duly adopted in accordance with Section 242 of the DGCL.

IN WITNESS WHEREOF, the undersigned, as a duly authorized officer of the Corporation, has executed this Certificate of Amendment on

May 20, 2026.

TSCAN THERAPEUTICS, INC

By:

/s/ Gavin MacBeath

Name Gavin MacBeath

Title: Chief Executive Officer

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