SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
SCHEDULE 13G
Under the Securities Exchange Act of 1934
(Amendment No.)*
Avista Healthcare Public Acquisition Corp.
(Name of Issuer)
Class A Ordinary Shares, par value $0.0001 per share
(Title of Class of Securities)
G0726L125**
(CUSIP Number)
December 31, 2016
(Date of Event Which Requires Filing of This Statement)
Check the appropriate box to designate the rule pursuant to which this Schedule is filed:
ý	Rule 13d-1(b)
¨	Rule 13d-1(c)
¨	Rule 13d-1(d)
(Page 1 of 6 Pages)

 

______________________________

*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 the disclosures provided in a prior cover page.

**The Ordinary Shares do not have a CUSIP number. The CINS number for the Ordinary Shares is G0726L125.

The information required in 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).

 

1	NAME OF REPORTING PERSON Fir Tree Inc.
2	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP		(a) ¨ (b) ¨
3	SEC USE ONLY
4	CITIZENSHIP OR PLACE OF ORGANIZATION New York
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH:	5	SOLE VOTING POWER 1,800,000 Ordinary Shares
	6	SHARED VOTING POWER 0
	7	SOLE DISPOSITIVE POWER 1,800,000 Ordinary Shares
	8	SHARED DISPOSITIVE POWER 0
9	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON 1,800,000 Ordinary Shares
10	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES			¨
11	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) 5.81%
12	TYPE OF REPORTING PERSON IA, CO

 

 

Item 1(a).	NAME OF ISSUER
	Avista Healthcare Public Acquisition Corp. (the "Issuer")

 

Item 1(b).	ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES
	65 East 55th Street, 18th Floor
	New York, New York 10022

 

Item 2(a).	NAME OF PERSON FILING
	This Schedule 13G is being filed on behalf of Fir Tree Inc., a New York corporation ("Fir Tree"), relating to Class A ordinary shares, par value $0.0001 per share (the "Ordinary Shares"), issued by the Issuer, purchased by certain private-pooled investment vehicles for which Fir Tree serves as the investment manager (the "Funds").
	Fir Tree is the investment manager of the Funds, and has been granted investment discretion over portfolio investments, including the Ordinary Shares held by the Funds.

 

Item 2(b).	ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE
	The address of the principal business office of Fir Tree is:
	Fir Tree Inc. 55 West 46th Street, 29th Floor New York, New York 10036

 

Item 2(c).	CITIZENSHIP
	Fir Tree is a New York corporation.

 

Item 2(d).	TITLE OF CLASS OF SECURITIES
	Class A Ordinary Shares, par value $0.0001 per share

 

Item 2(e).	CUSIP NUMBER
	The Ordinary Shares do not have a CUSIP number. The CINS number for the Ordinary Shares is G0726L125.

 

 

 

Item 3.

IF THIS STATEMENT IS FILED PURSUANT TO Rules 13d-1(b), OR 13d-2(b) OR (c), CHECK WHETHER THE PERSON FILING IS A:

 

	(a)	¨	Broker or dealer registered under Section 15 of the Act;
	(b)	¨	Bank as defined in Section 3(a)(6) of the Act;
	(c)	¨	Insurance company as defined in Section 3(a)(19) of the Act;
	(d)	¨	Investment company registered under Section 8 of the Investment Company Act of 1940;
	(e)	ý	An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
	(f)	¨	An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);
	(g)	¨	A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);
	(h)	¨	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;
	(i)	¨	A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act;
	(j)	¨	A non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J);
	(k)	¨	Group, in accordance with Rule 13d-1(b)(1)(ii)(K).

 

If filing as a non-U.S. institution in accordance with Rule 13d-1(b)(1)(ii)(J), please specify the type of institution:  ________________________________

 

Item 4.	OWNERSHIP
	The information required by Items 4(a) - (c) is set forth in Rows 5-11 of the cover page for the Reporting Person and is incorporated herein by reference.
	The percentage set forth in this Schedule 13G is calculated based on a total of 31,000,000 Ordinary Shares issued and outstanding, which is the sum of: (i) 30,000,000 Ordinary Shares issued and outstanding as of November 17, 2016, as reported in the Issuer's Quarterly Report on Form 10-Q for the quarterly period ended September 30, 2016, filed with the Securities and Exchange Commission (the "SEC") on November 18, 2016 and (ii) the 1,000,000 Ordinary Shares issued by the Issuer on November 28, 2016, as disclosed in the Current Report on Form 8-K filed by the Issuer on November 28, 2016.

 

Item 5.	OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS
	Not applicable.

 

 

 

Item 6.	OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON
	See Item 2(a). Fir Tree Capital Opportunity Master Fund, L.P., a Fund, has the right to receive or the power to direct the receipt of dividends from, and the proceeds from the sale of, more than 5 percent of the Ordinary Shares.

 

Item 7.	IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY OR CONTROL PERSON
	Not applicable.

 

Item 8.	IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP
	Not applicable.

 

Item 9.	NOTICE OF DISSOLUTION OF GROUP
	Not applicable.

 

Item 10.	CERTIFICATION
	By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect.

 

 

SIGNATURES

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

DATE: February 9, 2017

 

FIR TREE INC.
/s/ Brian Meyer
Name:	Brian Meyer
Title:	General Counsel