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Filing Details

Accession Number:: 0001193805-18-000778
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2018-05-31 16:19:52
Reporting Period:: 2018-05-29

Accepted Time:: 2018-05-31 16:19:52
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1730430	Kiniksa Pharmaceuticals Ltd.	KNSA	()	DE

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1009258	Deerfield Management Company, L.p. (Series C)	780 Third Avenue, 37Th Floor New York NY 10017	No	No	Yes	Yes
1010823	L.p. Mgmt Deerfield	780 Third Avenue 37Th Floor New York NY 10017	No	No	Yes	Yes
1301041	Deerfield Partners, L.p.	780 Third Avenue 37Th Floor New York NY 10017	No	No	Yes	Yes
1352546	E James Flynn	780 Third Avenue, 37Th Floor New York NY 10017	No	No	Yes	Yes
1354395	Deerfield Special Situations Fund, L.p.	780 3Rd Avenue 37Th Floor New York NY 10017	No	No	Yes	Yes

Reported Non-Derivative Transactions

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Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Class A Common Stock	Acquisiton	2018-05-29	383,538	$0.00	383,538	No	4	C	Indirect	Through Deerfield Special Situations Fund, L.P.
Class A Common Stock	Acquisiton	2018-05-29	333,333	$18.00	333,333	No	4	P	Indirect	Through Deerfield Partners, L.P.
Class A Common Stock	Acquisiton	2018-05-29	250,000	$19.81	583,333	No	4	P	Indirect	Through Deerfield Partners, L.P.
Class A Common Stock	Acquisiton	2018-05-29	25,000	$20.91	608,333	No	4	P	Indirect	Through Deerfield Partners, L.P.
Class A Common Stock	Acquisiton	2018-05-29	235,019	$19.24	843,352	No	4	P	Indirect	Through Deerfield Partners, L.P.

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	Through Deerfield Special Situations Fund, L.P.
No	4	P	Indirect	Through Deerfield Partners, L.P.
No	4	P	Indirect	Through Deerfield Partners, L.P.
No	4	P	Indirect	Through Deerfield Partners, L.P.
No	4	P	Indirect	Through Deerfield Partners, L.P.

Reported Derivative Transactions

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Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Class A Common Stock	Series C Preferred Stock	Disposition	2018-05-29	383,538	$0.00	383,538	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
0			No	4	C	Indirect

Footnotes

Each share of Series C Preferred Stock converted into one share of the Issuer's Class A Common Stock upon the closing of the Issuer's initial public offering. The number of shares reported herein gives effect to the 1-for-2.73235 reverse stock split of the Issuer's common stock and preferred stock effected by the Issuer in connection with its initial public offering.
The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $19.30 to $20.00, inclusive. The reporting persons undertake to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased at each separate price within the ranges set forth in footnotes (2), (3) and (4) of this Form 4.
The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $20.78 to $21.00, inclusive.
The price reported in Column 4 is a weighted average price. The shares were purchased in multiple transactions at prices ranging from $19.00 to $19.255, inclusive.
This Form 4 is being filed by the undersigned as well as the entities listed on the Joint Filer Information Statement attached as an exhibit hereto (the "Reporting Persons"). Deerfield Mgmt, L.P. is the general partner of each of Deerfield Partners, L.P. and Deerfield Special Situations Fund, L.P. (the "Funds"). Deerfield Management Company, L.P. is the investment manager of the Funds. James E. Flynn is the sole member of the general partner of each of Deerfield Mgmt, L.P. and Deerfield Management Company, L.P.
In accordance with Instruction 4(b)(iv) to Form 4, the entire amount of the Issuer's securities held by the Funds is reported herein. For purposes of Section 16 of the Securities Exchange Act of 1934, as amended, each Reporting Person disclaims beneficial ownership of any such securities, except to the extent of his/its indirect pecuniary interest therein, if any, and this report shall not be deemed an admission that such Reporting Person is the beneficial owner of such securities for purposes of Section 16 or otherwise.