SEC Form 3

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* Cormorant Asset Management, LP (Last) (First) (Middle) 200 CLARENDON STREET, 52ND FLOOR (Street) BOSTON MA 02116 (City) (State) (Zip)	2. Date of Event Requiring Statement (Month/Day/Year) 05/23/2018	3. Issuer Name and Ticker or Trading Symbol Kiniksa Pharmaceuticals, Ltd. [ KNSA ]
		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
Series C Preferred Shares	(1)	(1)	Common Shares	830,999	(1)	D(2)(3)

1. Name and Address of Reporting Person* Cormorant Asset Management, LP (Last) (First) (Middle) 200 CLARENDON STREET, 52ND FLOOR (Street) BOSTON MA 02116 (City) (State) (Zip)

1. Name and Address of Reporting Person* Cormorant Global Healthcare Master Fund, LP (Last) (First) (Middle) 200 CLARENDON STREET, 52ND FLOOR (Street) BOSTON DC 02116 (City) (State) (Zip)

1. Name and Address of Reporting Person* CORMORANT PRIVATE HEALTHCARE FUND I, LP (Last) (First) (Middle) 200 CLARENDON STREET, 52ND FLOOR (Street) BOSTON MA 02116 (City) (State) (Zip)

1. Name and Address of Reporting Person* Chen Bihua (Last) (First) (Middle) C/O CORMORANT ASSET MANAGEMENT, LP 200 CLARENDON STREET, 52ND FLOOR (Street) BOSTON MA 02116 (City) (State) (Zip)

Explanation of Responses:

1. The Series C Preferred Shares are convertible at any time, at the holder's election, on a 1-for-2.73235 basis and have no expiration date. The Class C Preferred Shares are expected to convert automatically upon the closing of the Issuer's initial public offering.

2. The Series C Preferred Shares reported herein represent, on an as-converted basis, (i) 640,617 Common Shares held by Cormorant Private Healthcare Fund I, LP ("Fund I"), (ii) 161,962 Common Shares held by Cormorant Global Healthcare Master Fund, LP (the "Master Fund"), and (iii) 28,420 Common Shares held by a managed account (the "Account").

3. Cormorant Asset Management, LP ("Cormorant") serves as the investment manager of Fund I, the Master Fund and the Account. Bihua Chen serves as manager of Cormorant. Each of the Reporting Persons disclaims beneficial ownership of the shares reported herein except to the extent of its or her pecuniary interest therein, and the filing of this Form 3 shall not be construed as an admission that any of the Reporting Persons is the beneficial owner of any such shares for purposes of Section 16(a) of the Securities Exchange Act of 1934 or for any other purpose.

	Cormorant Asset Management, LP, By: Cormorant Asset Management GP, LLC, its General Partner, By: Bihua Chen, Managing Member	05/23/2018
	/s/ CORMORANT GLOBAL HEALTHCARE MASTER FUND, LP, By: Cormorant Global Healthcare GP, LLC, its General Partner By: Bihua Chen, Managing Member	05/23/2018
	/s/ CORMORANT PRIVATE HEALTHCARE FUND I, LP By: Cormorant Private Healthcare GP, LLC, its General Partner By: Bihua Chen, Managing Member	05/23/2018
	/s/ Bihua Chen	05/23/2018
	** Signature of Reporting Person	Date
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