Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934
Date of Report (Date of earliest event reported): October 25, 2018

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Item 8.01      Other Events.

On September 14, 2018, Adapt Pharma Inc., Adapt Pharma Operations Limited and Adapt Pharma Ltd. (collectively, "Adapt") and Opiant Pharmaceuticals, Inc. ("Opiant") received notice from Perrigo UK FINCO Limited Partnership ("Perrigo"), that Perrigo had filed an Abbreviated New Drug Application ("ANDA"), with the United States Food and Drug Administration (the "FDA"), seeking regulatory approval to market a generic version of NARCAN®  (naloxone hydrochloride) Nasal Spray 4mg/spray before the expiration of U.S. Patent Nos. 9,211,253 (the "'253 Patent"), 9,468,747 (the "'747 Patent"), 9,561,177 (the "'177 Patent"), 9,629,965 (the "'965 Patent") and 9,775,838 (the "'838 Patent") (collectively, the "Patents-In-Suit"). Perrigo's notice letter asserts that its generic product will not infringe any valid and enforceable claim of the Patents-In-Suit.

On October 25, 2018, Emergent BioSolutions' Adapt subsidiaries and Opiant (collectively, the "Plaintiffs") filed a complaint for patent infringement against Perrigo in the United States District Court for the District of New Jersey arising from Perrigo's ANDA filing with the FDA. As a result of timely filing the lawsuit in accordance with the Hatch-Waxman Act, a 30-month stay of approval will be imposed by the FDA on Perrigo's ANDA, which is expected to remain in effect until March 2021 absent an earlier judgment, unfavorable to the Plaintiffs, by the Court.  The Plaintiffs seek, among other relief, an order that the effective date of FDA approval of the ANDA be a date no earlier than the expiration of each of the Patents-In-Suit, as well as equitable relief enjoining Perrigo from infringing these patents, and monetary relief as a result of any such infringement. Emergent continues to vigorously enforce the intellectual property portfolio related to NARCAN® Nasal Spray.

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.
Dated: October 25, 2018
Name:  Richard S. Lindahl
Title:  Executive Vice President, Chief Financial Officer and Treasurer