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 EXCHANGEACT OF 1934

Date of Report (Date of earliest event reported): March 5, 2026

TANGO THERAPEUTICS, INC.

(Exact name of registrant as specified in its charter)

     Delaware

     001-39485

     85-1195036

     (State or other jurisdiction 
of incorporation)

     (Commission
File Number)

     (IRS Employer
Identification No.)

    

     201 Brookline Ave., Suite 901
Boston, MA

02215

     (Address of principal executive offices)

     (Zip code)

Registrant’s telephone number, including area code: 857-320-4900

(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

     Trading
Symbol(s)

     Name of each exchange 
on which registered

      
Common stock, par value $0.001 
per share

TNGX

The Nasdaq Global Market

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405of 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 2.02 Results of Operations and Financial Condition.

On March 5, 2026, Tango Therapeutics, Inc. (“Tango” or the “Company”) issued a press release relating to its results of operations and financial condition for the quarter ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

The press release, and the information set forth therein (including Exhibit 99.1), is being furnished pursuant to Item 2.02 of this Current Report on Form 8-K and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934 (the “Exchange Act”) or otherwise subject to the liabilities of that section. Nor shall such document be deemed incorporated by reference in any filing under the Securities Act of 1933 or the Exchange Act, regardless of any general incorporation language in the filing unless specifically stated so therein.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits

Exhibit No. Description


99.1	Press Release issued by Tango Therapeutics, Inc. on March 5, 2026 relating to its results of operations and financial condition for the quarter ended December 31, 2025.


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.

TANGO THERAPEUTICS, INC.

Dated: March 5, 2026 By: /s/ Daniella Beckman

Name: Daniella Beckman

Title: Chief Financial Officer

Tango Therapeutics, Inc. 8-K