FORM 3

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 INITIAL STATEMENT OF BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person* Avista Acquisition Corp. (Last) (First) (Middle) C/O AVISTA HEALTHCARE PUBLIC ACQUISITION CORP. 65 EAST 55TH STREET, 18TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 10/07/2016	3. Issuer Name and Ticker or Trading Symbol Avista Healthcare Public Acquisition Corp. [ AHPA ]
		4. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)	5. If Amendment, Date of Original Filed (Month/Day/Year)
			6. Individual or Joint/Group Filing (Check Applicable Line) Form filed by One Reporting Person X Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Beneficially Owned
1. Title of Security (Instr. 4)	2. Amount of Securities Beneficially Owned (Instr. 4)	3. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	4. Nature of Indirect Beneficial Ownership (Instr. 5)

Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 4)	2. Date Exercisable and Expiration Date (Month/Day/Year)		3. Title and Amount of Securities Underlying Derivative Security (Instr. 4)		4. Conversion or Exercise Price of Derivative Security	5. Ownership Form: Direct (D) or Indirect (I) (Instr. 5)	6. Nature of Indirect Beneficial Ownership (Instr. 5)
	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Class B Ordinary Shares	(1)	(1)	Class A Ordinary Shares	6,740,000(1)	(1)	D(1)(2)(3)(4)

1. Name and Address of Reporting Person* Avista Acquisition Corp. (Last) (First) (Middle) C/O AVISTA HEALTHCARE PUBLIC ACQUISITION CORP. 65 EAST 55TH STREET, 18TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip)

1. Name and Address of Reporting Person* Avista Acquisition, LLC (Last) (First) (Middle) C/O AVISTA HEALTHCARE PUBLIC ACQUISITION CORP. 65 EAST 55TH STREET, 18TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip)

1. Name and Address of Reporting Person* Dean Thompson (Last) (First) (Middle) C/O AVISTA CAPITAL PARTNERS 65 EAST 55TH STREET, 18TH FLOOR (Street) NEW YORK NY 10022 (City) (State) (Zip)

1. Name and Address of Reporting Person* Burgstahler David F (Last) (First) (Middle) 1160 PARK AVENUE, APT. 12D (Street) NEW YORK NY 10128 (City) (State) (Zip)

Explanation of Responses:

1. Avista Acquisition Corp. ("Sponsor") directly owns 6,740,000 Class B ordinary shares, par value $0.0001 per share (the "Class B Shares"), of the Issuer, including 900,000 shares that are subject to forfeiture if the underwriters of the Issuer's initial public offering do not exercise in full an option granted to them to cover over-allotments. Pursuant to the Amended and Restated Memorandum and Articles of Association of the Issuer, such Class B Shares will automatically convert into Class A ordinary shares, par value $0.0001 per share, of the Issuer at the time of the Issuer's initial business combination on a one-for-one basis, subject to adjustment, and have no expiration date.

2. The sole shareholder of Sponsor is Avista Acquisition, LLC ("Avista Acquisiton"). Thompson Dean and David Burgstahler are the managers of Avista Acquisition (and, together with Sponsor, Messrs. Dean and Burgstahler are the "Reporting Persons").

3. Because of the relationship among the Reporting Persons, the Reporting Persons may be deemed to beneficially own the securities reported herein to the extent of their respective pecuniary interests. Each Reporting Person disclaims beneficial ownership of the securities reported herein, except to the extent of such Reporting Person's pecuniary interest therein, if any.

4. Pursuant to Rule 16a-1(a)(4) under the Exchange Act, this filing shall not be deemed an admission that the Reporting Persons are, for purposes of Section 16 of the Exchange Act or otherwise, the beneficial owners of any equity securities in excess of their respective pecuniary interests.

Remarks:

See Exhibit 24.1 - Power of Attorney, incorporated herein by reference. Exhibit 24.2 - Power of Attorney, incorporated herein by reference. Exhibit 99.1 Joint Filer Information, incorporated herein by reference.

	/s/ Benjamin Silbert, Attorney-in-Fact for Avista Acquisition Corp.	10/07/2016
	/s/Benjamin Silbert, Attorney-in Fact for Avista Acquisition, LLC	10/07/2016
	/s/ Benjamin Silbert, Attorney-in-Fact for Thompson Dean	10/07/2016
	/s/ Benjamin Silbert, Attorney-in-Fact for David Burgstahler	10/07/2016
	** Signature of Reporting Person	Date
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