TScan Therapeutics, Inc. — Director's Dealing 2021

Jul 22, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: TScan Therapeutics, Inc. (TCRX)
CIK: 0001783328
Period of Report: 2021-07-20

Reporting Person: Westphal Christoph H (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-07-20	Voting Common Stock	C	1145505	—	Acquired	1145505	Indirect
2021-07-20	Voting Common Stock	P	133333	$15.00	Acquired	1278838	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-07-20	Series A Preferred Stock	$	C	641848	Disposed		Voting Common Stock (641848)	Indirect
2021-07-20	Series B Preferred Stock	$	C	332594	Disposed		Voting Common Stock (332594)	Indirect
2021-07-20	Series C Preferred Stock	$	C	171063	Disposed		Voting Common Stock (171063)	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Voting Common Stock	914634	Direct
Voting Common Stock	121951	Indirect

Footnotes

F1: These shares are held by the Reporting Person's spouse.

F2: Each share of the Issuer's preferred stock automatically converted on a one for one basis into Voting Common Stock immediately prior to the closing of the Issuer's initial public offering, without payment or further consideration. The preferred stock had no expiration date.

F3: These shares are held by Longwood Fund IV, L.P. ("Longwood"). The general partner of Longwood is Longwood Fund IV GP, LLC ("Longwood GP"). Voting, investment and dispositive decisions at Longwood GP with respect to the securities held by Longwood are made by an investment committee comprised of Christoph Westphal, Richard Aldrich and John Lawrence (collectively, the "IC Members"). Longwood GP and each of the IC Members may be deemed to share voting, investment and dispositive power over the securities held by Longwood and as a result may be deemed to have beneficial ownership over such securities. Longwood GP and each of the IC Members disclaims beneficial ownership over the securities held by Longwood, except to the extent of their respective pecuniary interests therein.

F4: Represents shares purchased in the Issuer's initial public offering.