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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1789972	Cullinan Management Inc.	CGEM	()	4

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1134655	Ansbert Gadicke	C/O Mpm Asset Management Llc 450 Kendall Street Cambridge MA 02142		Yes	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	2021-01-07	281,268	$0.00	281,268	No	4	J	Direct
Common Stock	Acquisiton	2021-01-12	1,136,525	$0.00	1,136,525	No	4	C	Indirect	See footnotes
Common Stock	Acquisiton	2021-01-12	3,551,640	$0.00	4,688,165	No	4	C	Indirect	See footnotes
Common Stock	Acquisiton	2021-01-12	2,276,692	$0.00	6,964,857	No	4	C	Indirect	See footnotes
Common Stock	Acquisiton	2021-01-12	649,030	$0.00	7,613,887	No	4	C	Indirect	See footnotes
Common Stock	Acquisiton	2021-01-12	300,000	$21.00	7,913,887	No	4	P	Indirect	See footnotes

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

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	Series Seed Convertible Preferred Stock	Acquisiton	2021-01-07	1,136,525	$0.00	1,136,525	$0.00
Common Stock	Series A Convertible Preferred Stock	Acquisiton	2021-01-07	3,551,640	$0.00	3,551,640	$0.00
Common Stock	Series B Convertible Preferred Stock	Acquisiton	2021-01-07	2,276,692	$0.00	2,276,692	$0.00
Common Stock	Series C Convertible Preferred Stock	Acquisiton	2021-01-07	649,030	$0.00	649,030	$0.00
Common Stock	Stock Option (Right to Buy)	Acquisiton	2021-01-07	262,114	$0.00	262,114	$4.30
Common Stock	Stock Option (Right to Buy)	Acquisiton	2021-01-07	88,824	$0.00	88,824	$4.30
Common Stock	Series Seed Convertible Preferred Stock	Disposition	2021-01-12	1,136,525	$0.00	1,136,525	$0.00
Common Stock	Series A Convertible Preferred Stock	Disposition	2021-01-12	3,551,640	$0.00	3,551,640	$0.00
Common Stock	Series B Convertible Preferred Stock	Disposition	2021-01-12	2,276,692	$0.00	2,276,692	$0.00
Common Stock	Series C Convertible Preferred Stock	Disposition	2021-01-12	649,030	$0.00	649,030	$0.00

Remaning Holdings	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
1,136,525		No	4	J	Indirect
3,551,640		No	4	J	Indirect
2,276,692		No	4	J	Indirect
649,030		No	4	J	Indirect
262,114	2030-10-28	No	4	J	Direct
88,824	2030-10-28	No	4	J	Direct
0		No	4	C	Indirect
0		No	4	C	Indirect
0		No	4	C	Indirect
0		No	4	C	Indirect

Footnotes

Each share of Series Seed Preferred Stock, Series A Preferred Stock, Series B Preferred Stock, and Series C Preferred Stock (the "Preferred Stock") converted into shares of the Issuer's Common Stock on a 1-for-1 basis automatically upon the closing of the Issuer's initial public offering. The Preferred Stock had no expiration date.
25% of the shares vested on March 8, 2018, and the remaining shall vest in 36 equal monthly installments thereafter, subject to the Reporting Person's continuous service to the Issuer on each such date.
In connection with the Issuer's initial public offering, on January 7, 2021, these securities of the Issuer were received pursuant to a corporate reorganization.
These securities are owned directly by UBS Oncology Impact Fund LP ("OIF"). The general partner of OIF is Oncology Impact Fund (Cayman) Management L.P. ("OIF GP"). The general partner of OIF GP is MPM Oncology Impact Management L.P. The general partner of MPM Oncology Impact Management L.P. is MPM Oncology Impact Management GP LLC. Dr. Ansbert Gadicke is a member of the Issuer's board of directors and is a managing member and the managing director of MPM Oncology Impact Management GP LLC.
The Reporting Person disclaims beneficial ownership of the securities except to the extent of his pecuniary interest therein.
On January 12, 2021, OIF purchased 300,000 shares of Common Stock of the Issuer at a price of $21.00 per share pursuant to the Issuer's initial public offering.