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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1434418	Constellation Pharmaceuticals Inc	CNST	Pharmaceutical Preparations (2834)	000000000

Insiders

Cik	Name	Reported Address	Director	Officer	Large Shareholder	Other
1534260	Casdin Partners Gp, Llc	C/O Casdin Capital Llc 1350 Avenue Of The Americas, Suite 2405 New York NY 10019	No	No	Yes	No
1534261	Casdin Capital, Llc	1350 Avenue Of The Americas, Suite 2405 New York NY 10019	No	No	Yes	No
1534264	Eli Casdin	C/O Casdin Capital Llc 1350 Avenue Of The Americas, Suite 2405 New York NY 10019	No	No	Yes	No
1534265	Casdin Partners Master Fund, L.p.	C/O Casdin Capital Llc 1350 Avenue Of The Americas, Suite 2405 New York NY 10019	No	No	Yes	No
1730779	Casdin Venture Opportunities Fund, L.p.	C/O Casdin Capital Llc 1350 Avenue Of The Americas, Suite 2405 New York NY 10019	No	No	Yes	No
1746899	Casdin Venture Opportunities Fund Gp, Llc	C/O Casdin Capital Llc 1350 Avenue Of The Americas, Suite 2405 New York NY 10019	No	No	Yes	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2018-07-23	345,783	$0.00	345,783	No	4	C	Indirect	See footnote
Common Stock	Acquisiton	2018-07-23	266,667	$15.00	612,450	No	4	P	Indirect	See footnote
Common Stock	Acquisiton	2018-07-23	158,960	$0.00	158,960	No	4	C	Indirect	See footnote

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	C	Indirect	See footnote
No	4	P	Indirect	See footnote
No	4	C	Indirect	See footnote

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series E Preferred Stock	Disposition	2018-07-23	1,333,333	$0.00	155,716	$0.00
Common Stock	Series E-1 Preferred Stock	Disposition	2018-07-23	342,435	$0.00	31,104	$0.00
Common Stock	Series F Preferred Stock	Disposition	2018-07-23	1,750,000	$0.00	158,963	$0.00
Common Stock	Series F Preferred Stock	Disposition	2018-07-23	1,750,000	$0.00	158,960	$0.00

Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect
No	4	C	Indirect

Footnotes

On July 23, 2018, the Series E-1 and Series F Preferred Stock converted into Common Stock on a 11.009-for-one basis, and the Series E Preferred Stock converted into Common Stock on a 8.56256-for-one basis, upon the closing of the Issuer's initial public offering without payment of consideration. The Series E, Series E-1 and Series F Preferred Stock were convertible at any time at the holder's election and automatically upon the closing of the Issuer's initial pubic offering. The shares had no expiration date.
These securities are owned directly by Casdin Partners Master Fund, LP and may be deemed to be indirectly beneficially owned by (i) Casdin Capital, LLC, the investment adviser to Casdin Partners Master Fund, LP, (ii) Casdin Partners GP, LLC, the general partner of Casdin Partners Master Fund LP, and (ii) Eli Casdin, the managing member of Casdin Capital, LLC and Casdin Partners GP, LLC.
These securities are owned directly by Casdin Venture Opportunities Fund, LP and may be deemed to be indirectly beneficially owned by (i) Casdin Capital, LLC, the investment adviser to Casdin Venture Opportunities Fund, LP, (ii) Casdin Venture Opportunities Fund GP, LLC, the general partner of Casdin Venture Opportunities Fund, LP, and (ii) Eli Casdin, the managing member of Casdin Capital, LLC and Casdin Venture Opportunities Fund GP, LLC.