EX-32.1 7 inab-ex32_1.htm EX-32.1

Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report on Form 10-Q of IN8bio, Inc. (the “Company”) for the period ended June 30, 2026 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I certify, pursuant to 18 U.S.C. §1350, as adopted pursuant to §906 of the Sarbanes-Oxley Act of 2002, that, to the best of my knowledge:

(1)
The Report fully complies with the requirements of section 13(a) or 15(d) of the Securities Exchange Act of 1934, as amended; and
(2)
The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

|  | IN8bio, Inc.
Date: | August 6, 2026 | By: | /s/ William Ho
|  |  | William Ho
|  |  | Chief Executive Officer (Principal Executive Officer)
Date: | August 6, 2026 | By: | /s/ Patrick McCall
|  |  | Patrick McCall
|  |  | Chief Financial Officer and Secretary (Principal Financial and Accounting Officer)