Werewolf Therapeutics, Inc. — Director's Dealing 2021

May 6, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Werewolf Therapeutics, Inc. (HOWL)
CIK: 0001785530
Period of Report: 2021-05-04

Reporting Person: MPM BioVentures 2014, L.P. (10% Owner)
Reporting Person: MPM BioVentures 2014 (B), L.P. (10% Owner)
Reporting Person: MPM BioVentures 2014 LLC (10% Owner)
Reporting Person: MPM BioVentures 2014 GP LLC (10% Owner)
Reporting Person: Foley Todd (10% Owner)
Reporting Person: MPM Asset Management Investors BV2014 LLC (10% Owner)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-04	Common Stock	C	2298430	—	Acquired	2298430	Indirect
2021-05-04	Common Stock	C	763809	—	Acquired	3062239	Indirect
2021-05-04	Common Stock	P	125759	$16.00	Acquired	3187998	Indirect

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-04	Series A Preferred Stock	$	C	19925321	Disposed		Common Stock (2298430)	Indirect
2021-05-04	Series B Preferred Stock	$	C	6621546	Disposed		Common Stock (763809)	Indirect

Footnotes

F1: Each share of Series A Preferred Stock and Series B Preferred Stock converted into common stock on a 8.6691-for-1 basis into the number of shares of common stock shown in Column 7 without payment of further consideration upon closing of the initial public offering of the Issuer's common stock. The shares had no expiration date.

F2: The shares are held as follows: 2,087,358 by MPM BioVentures 2014, L.P. ("BV 2014"), 139,224 by MPM BioVentures 2014(B), L.P. ("BV 2014(B)") and 71,848 by MPM Asset Management Investors BV2014 LLC ("AM BV2014"). MPM BioVentures 2014 GP LLC and MPM BioVentures 2014 LLC ("BV LLC") are the direct and indirect general partners of BV 2014 and BV 2014(B). BV LLC is the manager of AM BV2014. Todd Foley is a Managing Director of BV LLC. Each Reporting Persons disclaims beneficial ownership of the securities except to the extent of his or its pecuniary interest therein.

F3: The shares are held as follows: 2,781,025 by BV 2014, 185,490 by BV 2014(B) and 95,724 by AM BV2014. Each Reporting Person disclaims beneficial ownership of the securities except to the extent of his or its pecuniary interest therein.

F4: The shares were purchased as follows: 114,210 by BV 2014, 7,618 by BV 2014(B) and 3,931 by AM BV2014.

F5: The shares are held as follows: 2,895,235 by BV 2014, 193,108 by BV 2014(B) and 99,655 by AM BV2014. Each Reporting Person disclaims beneficial ownership of the securities except to the extent of his or its pecuniary interest therein.

F6: The shares were held as follows: 2,087,358 by BV 2014, 139,224 by BV 2014(B) and 71,848 by AM BV2014.

F7: No securities held by the Reporting Persons.

F8: The shares were held as follows: 693,667 by BV 2014, 46,266 by BV 2014(B) and 23,876 by AM BV2014.