8-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the SecuritiesExchange Act of 1934

Date of Report (date of earliest event reported): November 20, 2025

iBio, Inc.

(Exact name of registrant as specified in charter)

Delaware

(State or other jurisdiction of incorporation)

11750Sorrento Valley Road, Suite 200

San Diego, California 92121

(Address of principal executive offices andzip code)

(979) 446-0027

(Registrant’s telephone number includingarea code)

N/A

(Former Name and Former Address)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of registrant under any of the following provisions:

Securities registered pursuant to Section 12(b) of the Act:

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of 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 checkmark 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.  ¨

On November 20, 2025, iBio, Inc. (the “Company”) held its Annual Meeting of Stockholders (the “Annual Meeting”). At the Annual Meeting, the Company’s stockholders voted on four (4) proposals and cast their votes as described below. A total of 10,566,364 shares were represented in person or by proxy, which represented a quorum. The matters below are described in detail in the Company’s definitive proxy statement on Schedule 14A (the “Definitive Proxy Statement”), which was filed with the Securities and Exchange Commission (the “Commission”) on October 6, 2025.

Proposal 1 – Election of Directors

The following two (2) nominees were elected as Class II directors of the Company’s Board of Directors (the “Board”), each to serve a three-year term expiring at the 2028 Annual Meeting of Stockholders and until such director’s successor is duly elected and qualified, with the following votes:

Proposal 2 – Auditor RatificationProposal

The stockholders ratified the appointment of Grassi & Co., CPAs, P.C. as the Company’s independent registered public accounting firm for the fiscal year ending June 30, 2026 based on the votes set forth below:

Proposal 3 - Advisory Vote on theApproval of Executive Compensation

The stockholders approved, on an advisory, non-binding basis, the compensation of the Company’s named executive officers (“say-on-pay”), as disclosed in the Definitive Proxy Statement. The results of the voting for this approved proposal are as follows:

Proposal 4 - Advisory Vote Regardingthe Frequency of Future Advisory Votes on Executive Compensation

The stockholders approved a one-year frequency for holding future advisory votes on executive compensation. The results for this approved proposal are as follows:

Following the approval by the Company’s stockholders and consistent with the voting results and the Board’s recommendation, the Company has determined to conduct an advisory vote on executive compensation every year, in accordance with the Dodd-Frank Wall Street Reform and Consumer Protection Act and the related Commission rules promulgated thereunder, until the Company is required to hold another advisory vote on the frequency of the advisory vote on executive compensation.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, as amended, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.