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

Pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, Thomas B. Pickens III, the Chief Executive Officer, and Jaime Hinojosa, the Chief Financial Officer, of Astrotech Corporation (the “Company”), hereby certify, that, to their knowledge:

1. The Quarterly Report on Form 10-Q for the period ended March 31, 2023 (the “Report”) of the Company fully complies with the requirements of Section 13(a) or 15 (d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: May 12, 2023
	/s/ Thomas B. Pickens III
	Thomas B. Pickens III
	Chief Executive Officer (principal executive officer)
	/s/ Jaime Hinojosa
	Jaime Hinojosa
	Chief Financial Officer (principal financial officer)