Exhibit 99.1

IBIO, INC. ANNOUNCES REVERSE STOCK SPLIT

NEW YORK, NEW YORK, MAY 31, 2018 — IBIO, INC. (NYSE AMERICAN: IBIO) (“IBIO” OR THE “COMPANY”) announced today a reverse split of its Common Stock, par value $0.001 per share (the “Common Stock”), at a ratio of 1 for 10, effective on June 8, 2018 (the “Effective Date”). The Company’s common stock will begin trading on a split-adjusted basis when the market opens on June 11, 2018. The reverse stock split was authorized by the Company’s stockholders at a special meeting of stockholders held on April 23, 2018 and the ratio and Effective Date were approved by the Company’s Board of Directors on May 23, 2018. The Company will file a certificate of amendment to its amended and restated certificate of incorporation with the Secretary of the State of Delaware to effect the reverse stock split. The Company’s common stock will continue to trade on the New York Stock Exchange under the trading symbol “IBIO” but will trade under the new CUSIP number 451033 203. As a result of the reverse split, each ten pre-split shares of common stock outstanding will automatically combine into one new share of common stock without any action on the part of the holders, and the number of outstanding common shares will be reduced from 115,918,510 shares to 11,591,851 shares.

The Company’s transfer agent, Continental Stock Transfer & Trust Company, which is also acting as the exchange agent for the reverse split, will send instructions to stockholders of record who hold stock certificates regarding the exchange of their old certificates for new certificates, should they wish to do so. Stockholders who hold their shares in brokerage accounts or “street name” are not required to take any action to effect the exchange of their shares.

About iBio, Inc.

iBio, a leader in developing plant-based biopharmaceuticals, provides a range of product and process development, analytical, and manufacturing services at the large-scale development and manufacturing facility of its subsidiary iBio CDMO, LLC in Bryan, Texas.  The facility houses laboratory and pilot-scale operations, as well as large-scale automated hydroponic systems capable of growing over four million plants as "in process inventory" and delivering over 300 kilograms of therapeutic protein pharmaceutical active ingredient per year.

iBio applies its technology for the benefit of its clients and the advancement of its own product interests. The Company’s pipeline is comprised of proprietary candidates for the treatment of a range of fibrotic diseases including idiopathic pulmonary fibrosis, systemic sclerosis, and scleroderma. IBIO-CFB03, based on the Company's proprietary gene expression technology, is the Company’s lead therapeutic candidate being advanced for IND development.

Further information is available at:  www.ibioinc.com

Cautionary Statement Regarding Forward Looking Statements

This release may contain "forward-looking statements" that are within the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are identified by certain words or phrases such as "may", "will", "aim", "will likely result", "believe", "expect", "will continue", "anticipate", "estimate", "intend", "plan", "contemplate", "seek to", "future", "objective", "goal", "project", "should", "will pursue" and similar expressions or variations of such expressions. These forward-looking statements reflect the Company's current expectations about its future plans and performance. These forward-looking statements rely on a number of assumptions and estimates which could be inaccurate and which are subject to risks and uncertainties. Actual results could vary materially from those anticipated or expressed in any forward-looking statement made by the Company. Please refer to the preliminary prospectus supplement, the accompanying prospectus, and the Company’s most recent Forms 10-Q and 10-K and subsequent filings with the SEC for a further discussion of these risks and uncertainties. The Company disclaims any obligation or intent to update the forward-looking statements in order to reflect events or circumstances after the date of this release.

Contact:

ICR, Inc.
Stephanie Carrington
Tel. +1 646-277-1282
stephanie.carrington@icrinc.com