SC 13D/A

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 1)*

NABRIVA THERAPEUTICS PLC

(Name of Issuer)

ORDINARY SHARES

(Title of Class of Securities)

62957M104

(CUSIP Number)
OrbiMed Advisors LLC

OrbiMed Capital GP V LLC

601 Lexington Avenue, 54th Floor

New York, NY 10022

Telephone:  (212) 739-6400

(Name, Address and Telephone Number of Person

Authorized to Receive Notices and Communications)

January 24, 2018

(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(b) 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).

SCHEDULE 13D

CUSIP No.  62957M104
1	NAME OF REPORTING PERSONS OrbiMed Advisors LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)			o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 3,919,600
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 3,919,600
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,919,600
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)			o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 14.6%*
14	TYPE OF REPORTING PERSON (See Instructions) IA

____________

*This percentage is calculated based upon 36,691,490 of the Issuer’s Ordinary Shares (as defined below) outstanding, as set forth in the Issuer’s Quarterly Report on Form 10-Q, filed with the SEC (as defined below) on November 9, 2017.  

SCHEDULE 13D

CUSIP No.  62957M104
1	NAME OF REPORTING PERSONS OrbiMed Capital GP V LLC
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (See Instructions) (a) o (b) o
3	SEC USE ONLY
4	SOURCE OF FUNDS (See Instructions) AF
5	CHECK BOX IF DISCLOSURE OF LEGAL PROCEEDINGS IS REQUIRED PURSUANT TO ITEMS 2(d) or 2(e)			o
6	CITIZENSHIP OR PLACE OF ORGANIZATION Delaware
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		7	SOLE VOTING POWER 0
		8	SHARED VOTING POWER 3,919,600
		9	SOLE DISPOSITIVE POWER 0
		10	SHARED DISPOSITIVE POWER 3,919,600
11	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 3,919,600
12	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (11) EXCLUDES CERTAIN SHARES (See Instructions)			o
13	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (11) 14.6%*
14	TYPE OF REPORTING PERSON (See Instructions) OO

____________

*This percentage is calculated based upon 36,691,490 of the Issuer’s Ordinary Shares (as defined below) outstanding, as set forth in the Issuer’s Quarterly Report on Form 10-Q, filed with the SEC (as defined below) on November 9, 2017.  

Item 1. Security and Issuer

This Amendment No. 1 (“Amendment No. 1”) to Schedule 13D supplements and amends the Statement on Schedule 13D originally filed by OrbiMed Advisors LLC, OrbiMed Capital GP V LLC and Samuel D. Isaly with the Securities and Exchange Commission (the “SEC”) on April 1, 2016 (the “Statement”).  This Statement relates to the Ordinary Shares, par value $0.01 per share (the “Ordinary Shares”), of Nabriva Therapeutics plc, a public limited company organized under the laws of Ireland (formerly known as Nabriva Therapeutics AG) (the “Issuer”).  The Ordinary Shares are listed on the NASDAQ Global Market under the ticker symbol “NBRV.”  The Issuer’s principal offices located at 25-28 North Wall Quay IFSC, Dublin 1, Ireland.  Information given in response to each item shall be deemed incorporated by reference in all other items, as applicable.

This Amendment No. 1 is being filed to report that Samuel D. Isaly, who was previously identified as a reporting person, has ceased to be the beneficial owner of more than five percent of the outstanding Ordinary Shares.

Item 2 of the Statement is amended to read in full as set forth below.

Item 2. Identity and Background

(a)              This Statement is being filed by OrbiMed Advisors LLC (“Advisors”), a limited liability company organized under the laws of Delaware, and OrbiMed Capital GP V LLC (“GP V”), a limited liability company organized under the laws of Delaware (collectively, the “Reporting Persons”).

(b) – (c), (f)     Advisors, a registered investment adviser under the Investment Advisers Act of 1940, as amended, is the sole managing member of GP V, which is the sole general partner of OrbiMed Private Investments V, LP (“OPI V”), which is the majority member of OrbiMed Private Investments V Cooperatief U.A. (“OPI V Cooperatief”), which is the sole shareholder of OrbiMed Private Investments V-NB B.V. (“OPI V-NB”).   OPI V and OPI V-NB (together, the “OPI V Entities”) hold Ordinary Shares, as described herein.  Advisors has its principal offices at 601 Lexington Avenue, 54th Floor, New York, New York 10022.

GP V has its principal offices at 601 Lexington Avenue, 54th Floor, New York, New York 10022.

The directors and executive officers of Advisors and GP V are set forth on Schedules I and II, attached hereto.  Schedules I and II set forth the following information with respect to each such person:

(i)               name;

(ii)              business address;

(iii)             present principal occupation or employment and the name, principal business and address of any corporation or other organization in which such employment is conducted; and

(iv)             citizenship.

(d) – (e)     During the last five years, neither the Reporting Persons nor any person named in Schedule I or II have been (i) convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors) or (ii) a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and as a result of such proceeding was or is subject to a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, federal or state securities laws or finding any violation with respect to such laws.

Item 5 of the Statement is amended to read in full as set forth below.

Item 5. Interest in Securities of the Issuer

(a)-(b)        As of the date of this filing, the Reporting Persons may be deemed, for purposes of Rule 13d-3 of the Act, directly or indirectly, including by reason of their mutual affiliation, to be the beneficial owners of the Ordinary Shares described in Item 6 below.  Based upon information contained in the Issuer’s Quarterly Report on Form 10-Q, filed with the SEC on November 9, 2017, such Ordinary Shares constitute approximately 14.6% of the issued and outstanding Ordinary Shares.  Advisors, pursuant to its authority as the sole managing member of GP V, the sole general partner of OPI V, may be deemed to indirectly beneficially own the Ordinary Shares held by the OPI V Entities.  GP V, pursuant to its authority as the general partner of OPI V, may be deemed to indirectly beneficially own the Ordinary Shares held by the OPI V Entities.  As a result, Advisors and GP V share the power to direct the vote and to direct the disposition of the Ordinary Shares held by the OPI V Entities.  Advisors exercises this investment and voting power through a management committee comprised of Carl L. Gordon, Sven H. Borho and Jonathan T. Silverstein, each of whom disclaims beneficial ownership of the Ordinary Shares held by the OrbiMed V Entities.

(c)              The Reporting Persons have not effected any transactions in the Ordinary Shares during the past sixty (60) days.

(d)              Not applicable.

(e)              As of January 24, 2018, Samuel D. Isaly, who was previously identified as a reporting person, has ceased to be the beneficial owner of more than five percent of the outstanding shares of Ordinary Shares.

The first paragraph of Item 6 of the Statement is amended to read in full as follows.

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

In addition to the relationships between the Reporting Persons described in Items 2 and 5 above, OPI V Cooperatief is the sole shareholder of OPI V-NB, pursuant to the terms of the Deed of Incorporation of OPI V-NB.  OPI V is the majority member of OPI V Cooperatief, pursuant to the terms of Deed of Incorporation of OPI V Cooperatief.  GP V is the sole general partner of OPI V, pursuant to the terms of the limited partnership agreement of OPI V.  Advisors is the sole managing member of GP V, pursuant to the terms of the limited liability company agreement of GP V.  Pursuant to these agreements and relationships, Advisors and GP V have discretionary investment management authority with respect to the assets of OPI V.  Such authority includes the power of GP V to vote and otherwise dispose of securities purchased by the OPI V Entities.  The number of outstanding Ordinary Shares attributable to the OPI V Entities is 3,919,600 Ordinary Shares.  Advisors and GP V may each be considered to hold indirectly 3,919,600 Ordinary Shares.

Item 7. Materials to Be Filed as Exhibits

Exhibit	Description
1.	Joint Filing Agreement among OrbiMed Advisors LLC and OrbiMed Capital GP V LLC.

SIGNATURE

After reasonable inquiry and to the best of each of the undersigned’s knowledge and belief, each of the undersigned certifies that the information set forth in this statement is true, complete and correct.

Dated:  January 25, 2018                   

OrbiMed Advisors LLC
By:	/s/ Jonathan T. Silverstein
	Name:	Jonathan T. Silverstein
	Title:	Member of OrbiMed Advisors LLC
By:	/s/ Sven H. Borho
	Name:	Sven H. Borho
	Title:	Member of OrbiMed Advisors LLC
By:	/s/ Carl L. Gordon
	Name:	Carl L. Gordon
	Title:	Member of OrbiMed Advisors LLC
OrbiMed Capital GP V LLC
By:	OrbiMed Advisors LLC its managing member
By:	/s/ Jonathan T. Silverstein
	Name:	/s/ Jonathan T. Silverstein
	Title:	Member of OrbiMed Advisors LLC
By:	/s/ Sven H. Borho
	Name:	Sven H. Borho
	Title:	Member of OrbiMed Advisors LLC
By:	/s/ Carl L. Gordon
	Name:	Carl L. Gordon
	Title:	Member of OrbiMed Advisors LLC

Schedule I

The name and present principal occupation of each of the executive officers and directors of OrbiMed Advisors LLC are set forth below.  Unless otherwise noted, each of these persons are United States citizens and have as their business address 601 Lexington Avenue, 54th Floor, New York, NY 10022.

Name	Position with Reporting Person	Principal Occupation
Samuel D. Isaly	Managing Member	Managing Member OrbiMed Advisors LLC
Carl L. Gordon	Member	Member OrbiMed Advisors LLC
Sven H. Borho German and Swedish Citizen	Member	Member OrbiMed Advisors LLC
Jonathan T. Silverstein	Member	Member OrbiMed Advisors LLC
W. Carter Neild	Member	Member OrbiMed Advisors LLC
Geoffrey C. Hsu	Member	Member OrbiMed Advisors LLC
Evan D.  Sotiriou	Chief Financial Officer	Chief Financial Officer OrbiMed Advisors LLC

Schedule II

The business and operations of OrbiMed Capital GP V LLC are managed by the executive officers and directors of its managing member, OrbiMed Advisors LLC, set forth on Schedule I attached hereto.

EXHIBIT INDEX

Exhibit	Description
1.	Joint Filing Agreement among OrbiMed Advisors LLC and OrbiMed Capital GP V LLC.

EX-99.1

EXHIBIT 1

JOINT FILING AGREEMENT

The undersigned hereby agree that the Statement on this Schedule 13D, dated January 25, 2018 (the “Schedule 13D”), with respect to the Ordinary Shares, of Nabriva Therapeutics plc is filed, and all amendments thereto will be filed, on behalf of each of us pursuant to and in accordance with the provisions of Rule 13d-1(k) under the Securities and Exchange Act of 1934, as amended, and that this Agreement shall be included as an Exhibit to this Schedule 13D.  Each of the undersigned agrees to be responsible for the timely filing of the Schedule 13D, and for the completeness and accuracy of the information concerning itself contained therein.  This Agreement may be executed in any number of counterparts, all of which taken together shall constitute one and the same instrument.

IN WITNESS WHEREOF, the undersigned have executed this Agreement as of the 25th day of January, 2018.

OrbiMed Advisors LLC
By:	/s/ Jonathan T. Silverstein
	Name:	Jonathan T. Silverstein
	Title:	Member of OrbiMed Advisors LLC
By:	/s/ Sven H. Borho
	Name:	Sven H. Borho
	Title:	Member of OrbiMed Advisors LLC
By:	/s/ Carl L. Gordon
	Name:	Carl L. Gordon
	Title:	Member of OrbiMed Advisors LLC
OrbiMed Capital GP V LLC
By:	OrbiMed Advisors LLC its managing member
By:	/s/ Jonathan T. Silverstein
	Name:	/s/ Jonathan T. Silverstein
	Title:	Member of OrbiMed Advisors LLC
By:	/s/ Sven H. Borho
	Name:	Sven H. Borho
	Title:	Member of OrbiMed Advisors LLC
By:	/s/ Carl L. Gordon
	Name:	Carl L. Gordon
	Title:	Member of OrbiMed Advisors LLC