Amy Schulman - Dec 13, 2021 Form 4 Insider Report for SQZ Biotechnologies Co (SQZB)

Role: Director, 10%+ Owner
Signature: /s/ Lawrence Knopf, Attorney-in-Fact for Amy W. Schulman
Stock symbol: SQZB
Transactions as of: Dec 13, 2021
Transactions value $: $40,367
Form type: 4
Date filed: 12/15/2021, 04:15 PM
Previous filing: Oct 29, 2021
Next filing: Dec 23, 2021

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	SQZB	Common Stock	Purchase	$20.1K	+1.85K		$10.88^*	1.85K	Dec 13, 2021	See footnote	F1
transaction	SQZB	Common Stock	Purchase	$20.2K	+1.85K		$10.94^*	1.85K	Dec 13, 2021	See footnote	F2
holding	SQZB	Common Stock						191K	Dec 13, 2021	Direct
holding	SQZB	Common Stock						178K	Dec 13, 2021	See footnotes	F3, F4
holding	SQZB	Common Stock						276K	Dec 13, 2021	See footnotes	F5
holding	SQZB	Common Stock						2.55M	Dec 13, 2021	See footnotes	F4, F6

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	These shares are held in trust 1 for the benefit of a child of the reporting person. The reporting person's spouse has investment authorization over the trust. The reporting person disclaims beneficial ownership of these securities, and the filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.
F2	These shares are held in trust 2 for the benefit of a child of the reporting person. The reporting person's spouse has investment authorization over the trust. The reporting person disclaims beneficial ownership of these securities, and the filing of this report is not an admission that the reporting person is the beneficial owner of these securities for purposes of Section 16 or for any other purpose.
F3	These shares are held of record by Polaris Entrepreneurs' Fund VII, L.P. ("EF VII"). Polaris Management Co. VII, L.L.C. ("PMC VII") is the general partner of EF VII. David Barrett, Brian Chee, Amir Nashat and Bryce Youngren (the "Managing Members") are the managing members of PMC VII. The Reporting Person, a member of the Issuer's board of directors, holds an interest in PMC VII.
F4	Each of the Managing Members and the Reporting Person, in their respective capacities with respect to PMC VII, may be deemed to have shared investment, voting and dispositive power over these shares. Each of PMC VII, the Managing Members and the Reporting Person disclaim beneficial ownership of these shares and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.
F5	These shares are held of record by LS Polaris Innovation Fund, L.P. ("LSPIF"). LS Polaris Innovation Fund GP, L.L.C. ("LSPIF GP") is the general partner of LSPIF. The Reporting Person is the sole managing member of LSPIF GP. Each of LSPIF GP and the Reporting Person may be deemed to have sole investment, voting and dispositive power over these shares. LSPIF GP and the Reporting Person disclaim beneficial ownership of the shares held by LSPIF and this report shall not be deemed an admission that any one of them is the beneficial owner of such securities for purposes of Section 16 or for any other purpose, except to the extent of their respective pecuniary interests therein.
F6	These shares are held of record by Polaris Partners VII, L.P. ("PP VII"). PMC VII is the general partner of PP VII. The Managing Members are the managing members of PMC VII. The Reporting Person, a member of the Issuer's board of directors, holds an interest in PMC VII.