Exhibit 32.1

CERTIFICATION PURSUANT TO
18 U.S.C. §1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of iBio, Inc. (the Company) on Form 10-K for the fiscal year ended June 30, 2021 as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, Thomas F. Isett 3^rd, Chairman and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that to my knowledge:


	1.	The Report 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.


September 28, 2021	/s/ Thomas F. Isett 3^rd
	Thomas F. Isett 3^rd
	Chairman and Chief Executive Officer
	(Principal Executive Officer)

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to iBio, Inc. and will be furnished to the Securities and Exchange Commission or its staff upon request.