EX-32.1 4 exhibit32-1q32025.htm EX-32.1
EXHIBIT 32.1
Certification of Principal Executive Officer
Pursuant to 18 U.S.C. 1350
(Section 906 of the Sarbanes-Oxley Act of 2002)
I, Eric Risser, President and Chief Executive Officer (principal executive officer) of MacroGenics, Inc. (the Registrant), certify, to the best of my knowledge, based upon a review of the Quarterly Report on Form 10-Q for the period ended September 30, 2025 of the Registrant (the Report), that:
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 Registrant.
/s/ Eric Risser
Name: Eric Risser
Date: November 12, 2025