THOMAS G. RICKS - 21 May 2025 Form 4 Insider Report for Sensei Biotherapeutics, Inc. (SNSE)

Role: Director
Signature: /s/ Mark Ballantyne, Attorney-in-Fact
Issuer symbol: SNSE
Transactions as of: 21 May 2025
Net transactions value: $0
Form type: 4
Filing time: 23 May 2025, 16:30:20 UTC
Previous filing: 20 May 2025
Next filing: 08 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
RICKS THOMAS G	Director	C/O SENSEI BIOTHERAPEUTICS, INC., 1405 RESEARCH BLVD, SUITE 125, ROCKVILLE	/s/ Mark Ballantyne, Attorney-in-Fact	23 May 2025	0001013023

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	SNSE	Stock Option (Right to Buy)	Award	$0	+19,000		$0.000000	19,000	21 May 2025	Common Stock	19,000	$0.3202	Direct	F1

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

Explanation of Responses:

Id	Content
F1	The shares subject to the option vest and become exercisable in 12 equal monthly installments over a one year period such that the option is fully vested on the first anniversary of the date of grant, or May 21, 2026, subject to the Reporting Person's continuous service with the Issuer as of each such vesting date; provided that the option will in any case be fully vested on the date of the Company's next annual stockholder meeting, subject to the Reporting Person's continuous service with the Issuer through such vesting date.

Content

The shares subject to the option vest and become exercisable in 12 equal monthly installments over a one year period such that the option is fully vested on the first anniversary of the date of grant, or May 21, 2026, subject to the Reporting Person's continuous service with the Issuer as of each such vesting date; provided that the option will in any case be fully vested on the date of the Company's next annual stockholder meeting, subject to the Reporting Person's continuous service with the Issuer through such vesting date.