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<div style="FONT-SIZE: 18pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 20.5pt">UNITED STATES</div>

<div style="FONT-SIZE: 18pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 20.5pt">SECURITIES AND EXCHANGE COMMISSION</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">WASHINGTON, D.C. 20549</div>

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<div style="FONT-SIZE: 18pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 20.5pt">FORM 8-K</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 13.7pt">CURRENT REPORT</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 13.7pt">Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Date of Report (Date of earliest event reported):<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold"> October 25, 2018</font></div>

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<div style="FONT-SIZE: 18pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 20.5pt">EMERGENT BIOSOLUTIONS INC.</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">(Exact name of registrant as specified in its charter)</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">14-1902018</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">of incorporation)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Identification No.)</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">400 Professional Drive, Suite 400,</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">Gaithersburg, Maryland 20879</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">(Address of principal executive offices, including zip code)</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">(240) 631-3200</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">N/A</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: center; LINE-HEIGHT: 11.4pt">(Former name or former address, if changed since last report)</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-STYLE: italic">see</font> General Instruction A.2. below):</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">&#9744;</font> Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))</div>

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<div style="MARGIN-BOTTOM: 12pt; FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 13.1pt">Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">&#167;</font>230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">&#167;</font>240.12b-2 of this chapter).</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">If an emerging growth company, indicate by check mark 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. <font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Segoe UI Symbol', sans-serif">&#9744;</font></div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">On September 14, 2018, <a name="_Hlk528060295"><!--Anchor--></a>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<sup style="vertical-align: text-top; line-height: 1; font-size: smaller">&#174;</sup> &#160;(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 <font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">infringe any valid and enforceable claim of th</font>e Patents-In-Suit.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">On October 25, 2018, Emergent BioSolutions' Adapt subsidiaries and Opiant (collectively, the "Plaintiffs") filed a complaint for patent infringement against <font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">Perrigo </font>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.&#160; 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. <font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif">Emergent continues to vigorously enforce the</font> intellectual property portfolio related to NARCAN<sup style="vertical-align: text-top; line-height: 1; font-size: smaller">&#174;</sup> Nasal Spray.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: justify; LINE-HEIGHT: 11.4pt">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.</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; FONT-WEIGHT: bold; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">EMERGENT BIOSOLUTIONS INC.</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Dated:&#160;October 25, 2018</div>
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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">/s/ RICHARD S. LINDAHL</div>

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<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Name:&#160; Richard S. Lindahl</div>

<div style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif; TEXT-ALIGN: left; LINE-HEIGHT: 11.4pt">Title:&#160; Executive Vice President, Chief Financial Officer and Treasurer<font style="FONT-SIZE: 10pt; FONT-FAMILY: 'Times New Roman', Times, serif"><br>
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UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549
FORM 8-K
CURRENT REPORT
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
EMERGENT BIOSOLUTIONS INC.
(Exact name of registrant as specified in its charter)
DELAWARE
001-33137
14-1902018
(State or other jurisdiction
(Commission File Number)
(IRS Employer
of incorporation)
Identification No.)
400 Professional Drive, Suite 400,
Gaithersburg, Maryland 20879
(Address of principal executive offices, including zip code)
(240) 631-3200
(Registrant's telephone number, including area code)
N/A
(Former name or former address, if changed since last report)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (
see
General Instruction A.2. below):
☐
Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)
☐
Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)
☐
Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))
☐
Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))
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
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If an emerging growth company, indicate by check mark 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.
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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 th
e 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.
SIGNATURE
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.
EMERGENT BIOSOLUTIONS INC.
Dated: October 25, 2018
By:
/s/ RICHARD S. LINDAHL
Name:  Richard S. Lindahl
Title:  Executive Vice President, Chief Financial Officer and Treasurer