UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934
(Amendment No. 8)*

iBio, Inc.

(Name of Issuer)

COMMON, $0.001 PAR VALUE PER SHARE

(Title of Class of Securities)

451033104

(CUSIP Number)

William Sullivan, 10 Market Street, #773 Camana Bay Grand Cayman, KY1-9006 CAYMAN ISLANDS, 345-640-3300

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

February 23, 2017

(Date of Event which Requires Filing of this Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box. ¨

Note: Schedules filed in paper format shall include a signed original and five copies of the schedule, including all exhibits. See §240.13d-7 for other parties to whom copies are to be sent.

* The remainder of this cover page shall be filled out for a reporting person's initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on 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 ("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).

Explanatory Note

This Amendment No. 8 (the “Amendment”) to Schedule 13D (as amended, this “Schedule”) amends certain items of the Schedule 13D originally filed on January 19, 2012 (the “Original 13D) filed by Kenneth B. Dart (the “Reporting Person”) and certain affiliates as amended from time-to -time. Capitalized terms not defined shall have the meanings set forth in the Original 13D.

Item 4.  Purpose of Transaction.

Item 4 is hereby amended and supplemented as follows:

Pursuant to an Exchange Agreement dated February 23, 2017, an entity indirectly owned 100% by the Reporting Person (“the Affiliate”) acquired one (1) share of the Issuer’s Preferred Stock designated as iBio CMO Preferred Tracking Stock with a par value of $0.001 per share (the “Preferred Tracking Stock”) in exchange for 29,990,000 units of limited liability company interests of iBio CMO LLC (“Units”) held by the Affiliate. iBio CMO LLC is a subsidiary of the Issuer. The shares of the Preferred Tracking Stock are exchangeable for Units only after March 31, 2018 (“Mandatory Exchange”), or an event which triggers a change of control of iBio CMO LLC, or in connection with a winding up, liquidation or deemed liquidation (such as a merger) of the Issuer or iBio CMO, subject to the terms and conditions set forth in the Exchange Agreement and the Certificate of Designation, Preferences and Rights of the iBio CMO Preferred Tracking Stock. The Preferred Tracking Stock is not convertible into or exchangeable for any securities of the Issuer.

Item 5.  Interest in Securities of the Issuer.

Item 5(c) is hereby amended and supplemented as follows:

The disclosure in Item 4 above is incorporated by reference herein.

Item 6.  Contracts, Arrangements, Understandings or Relationships with Respect to Securities of the Issuer.

Item 6 is hereby amended and supplemented as follows:

The disclosure in Item 4 above is incorporated by reference herein.

Item 7.  Material to Be Filed as Exhibits.

Exhibit 1 – Exchange Agreement (Incorporated herein by reference to Exhibit 10.1 to the Issuer’s 8-K filed with the U.S. Securities and Exchange Commission on February 24, 2017).

Exhibit 2 - Certificate of Designation, Preferences and Rights of the iBio CMO Preferred Tracking Stock (Incorporated herein by reference to Exhibit 3.1 to the Issuer’s 8-K filed with the U.S. Securities and Exchange Commission on February 24, 2017).

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.