IBIO iBio Inc

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

Under the Securities Exchange Act of 1934

(Amendment No. )*

IBIO, INC.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

451033708

(CUSIP Number)

September 30, 2024

(Date of Event which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

☒ Rule 13d-1(b)

☐ Rule 13d-1(c)

☐ Rule 13d-1(d)

The information required in the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934, as amended (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications:

Evan K. Hall, Esq.

Haynes and Boone, LLP

2801 N. Harwood Street, Suite 2300

Dallas, Texas 75201

(214) 651-5000

SCHEDULE 13G

CUSIP No. 451033708

SCHEDULE 13G

CUSIP No. 451033708

iBio, Inc., a Delaware corporation (the “Issuer”).

600 Madison Avenue, Suite 1601, New York, NY, 10022

This statement is filed jointly by and on behalf of each of Ikarian Capital, LLC, a Delaware limited liability company (“Ikarian Capital”), and Neil Shahrestani (together referred herein as the “Reporting Persons”). Ikarian Healthcare Master Fund, L.P., a Cayman Islands exempted limited partnership (the “Fund”), and certain separately managed accounts managed by Ikarian Capital (collectively, the “Managed Accounts”) are the record owners of the securities covered by this statement. Ikarian Capital is an investment adviser registered under the Investment Advisers Act of 1940, as amended, and serves as investment manager to the Fund and as sub-adviser to the Managed Accounts, and may be deemed to have beneficial ownership of the securities covered by this statement through the investment discretion it has over the Fund and the Managed Accounts. Ikarian Capital is ultimately controlled, indirectly, by Mr. Shahrestani. Accordingly, Mr. Shahrestani may be deemed to indirectly beneficially own securities beneficially owned by Ikarian Capital. The Fund disclaims beneficial ownership of the shares held by the Managed Accounts. The Managed Accounts disclaim beneficial ownership of the shares held by the Fund.

Each Reporting Person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) or 13(g) of the Act or any other purpose, the beneficial owner of any securities covered by this statement.

Each Reporting Person may be deemed to be a member of a group with respect to the issuer or securities of the issuer for the purpose of Section 13(d) or 13(g) of the Act. Each of the Reporting Persons declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purpose of Section 13(d) or 13(g) of the Act or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate, or other group for the purpose of acquiring, holding, or disposing of securities of the issuer or otherwise with respect to the issuer or any securities of the issuer or (ii) a member of any group with respect to the issuer or any securities of the issuer.

The address of the principal business office of each of the Reporting Persons is c/o Ikarian Capital, LLC, 100 Crescent Court, Suite 1620, Dallas, Texas 75201.

See Item 4 on the cover page(s) hereto.

Common Stock

451033708

The information set forth in Item 2(a) is incorporated by reference herein.

If this statement is being filed to report the fact that as of the date hereof the Reporting Persons have ceased to be the beneficial owners of more than five percent of the class of securities, check the following ☐.

The information set forth in Item 2(a) is incorporated by reference herein.

Not applicable.

Not applicable.

Not applicable.

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dated: November 14, 2024

EXHIBIT INDEX

EXHIBIT 99.1

JOINT FILING AGREEMENT

November 14, 2024

Pursuant to and in accordance with the Securities Exchange Act of 1934, as amended (the “Act”), and the rules and regulations thereunder, each party hereto hereby agrees to the joint filing, on behalf of each of them, of any filing required by such party under Section 13 or Section 16 of the Act or any rule or regulation thereunder (including any amendment, restatement, supplement, and/or exhibit thereto) with the Securities and Exchange Commission (and, if such security is registered on a national securities exchange, also with the exchange), and further agrees to the filing, furnishing, and/or incorporation by reference of this Joint Filing Agreement as an exhibit thereto. This Joint Filing Agreement shall remain in full force and effect until revoked by any party hereto in a signed writing provided to each other party hereto, and then only with respect to such revoking party.

IN WITNESS WHEREOF, each party hereto, being duly authorized, has caused this Joint Filing Agreement to be executed and effective as of the date first written above.