MPM ASSET MANAGEMENT LLC - Insider Trades & Share Buys/Sales

Real time insider trading transaction history:

Insiders are prohibited from making short-swing profits by trading their shares within 6 months of the registration or acquiring the shares.
Shares are not adjusted for stock split.

"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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Insider Trading Transactions for MPM ASSET MANAGEMENT LLC

Common stock purchase or sale:

Transaction Date	Reported DateTime	Company	Symbol	Insider Relationship	Shares Traded	Average Price	Total Amount	Shares Owned	Filing
2025-12-02 Sale	2025-12-04 6:18 pm	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC Former 10% Owner	199,732	$0.91761	$183,275	4,784,111 (Indirect)	View
2025-11-26 Sale	2025-12-01 6:11 pm	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	141,927	$0.96426	$136,855	4,983,843 (Indirect)	View
2025-11-21 Sale	2025-11-25 6:03 pm	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	195,666	$0.91764	$179,551	5,125,770 (Indirect)	View
2025-11-18 Sale	2025-11-20 5:50 pm	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	160,103	$0.92386	$147,913	5,321,436 (Indirect)	View
2025-11-13 Sale	2025-11-17 7:20 pm	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	209,652	$0.95713	$200,665	5,481,539 (Indirect)	View
2025-11-07 Sale	2025-11-12 7:31 pm	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	213,529	$1.13	$241,278	5,691,191 (Indirect)	View
2025-11-04 Sale	2025-11-06 7:40 pm	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	242,890	$1.2178	$295,781	5,904,720 (Indirect)	View
2025-10-30 Sale	2025-11-03 7:07 pm	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	295,043	$1.3274	$391,636	6,147,610 (Indirect)	View
2025-10-27 Sale	2025-10-29 7:21 pm	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	276,017	$1.6173	$446,403	6,442,653 (Indirect)	View
2025-03-27 Sale	2025-04-30 4:08 pm	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	4,386	$1.05	$4,605	6,718,670 (Indirect)	View
2023-05-22 Sale	2023-05-24 4:39 pm	TCR2 THERAPEUTICS INC.	TCRR	MPM ASSET MANAGEMENT LLC EVNIN LUKE 10% Owner	70,170	$1.88	$131,920	3,674,978 (Indirect Direct)	View
2021-04-13 Sale	2021-04-15 8:01 pm	Harpoon Therapeutics Inc.	HARP	MPM BioVentures 2014 L.P. MPM ASSET MANAGEMENT LLC MPM BioVentures 2014 (B) L.P. MPM Asset Management Investors BV2014 LLC MPM BioVentures 2014 LLC MPM BioVentures 2014 GP LLC Foley Todd EVNIN LUKE Former 10% Owner	4,666	$20.16	$94,075	3,220,844 (Indirect)	View
2021-04-09 Sale	2021-04-13 4:12 pm	Harpoon Therapeutics Inc.	HARP	MPM BioVentures 2014 L.P. MPM ASSET MANAGEMENT LLC MPM BioVentures 2014 (B) L.P. MPM Asset Management Investors BV2014 LLC MPM BioVentures 2014 LLC MPM BioVentures 2014 GP LLC Foley Todd EVNIN LUKE 10% Owner	12,796	$23.15	$296,261	3,225,510 (Indirect)	View
2021-02-10 Sale	2021-02-12 5:03 pm	Harpoon Therapeutics Inc.	HARP	MPM BioVentures 2014 L.P. MPM ASSET MANAGEMENT LLC MPM BioVentures 2014 (B) L.P. MPM Asset Management Investors BV2014 LLC MPM BioVentures 2014 LLC MPM BioVentures 2014 GP LLC Foley Todd GADICKE ANSBERT EVNIN LUKE 10% Owner	183,051	$20	$3,661,020	7,136,728 (Indirect)	View
2021-02-05 Sale	2021-02-09 6:14 pm	Harpoon Therapeutics Inc.	HARP	MPM BioVentures 2014 L.P. MPM ASSET MANAGEMENT LLC MPM BioVentures 2014 (B) L.P. MPM Asset Management Investors BV2014 LLC MPM BioVentures 2014 LLC MPM BioVentures 2014 GP LLC Foley Todd GADICKE ANSBERT EVNIN LUKE 10% Owner	91,700	$20.06	$1,839,337	7,319,779 (Indirect)	View
2021-02-02 Sale	2021-02-04 7:30 pm	Harpoon Therapeutics Inc.	HARP	MPM BioVentures 2014 L.P. MPM ASSET MANAGEMENT LLC MPM BioVentures 2014 (B) L.P. MPM Asset Management Investors BV2014 LLC MPM BioVentures 2014 LLC MPM BioVentures 2014 GP LLC Foley Todd GADICKE ANSBERT EVNIN LUKE 10% Owner	120,073	$20.22	$2,427,558	7,411,479 (Indirect)	View
2021-01-25 Sale	2021-01-27 8:35 pm	Harpoon Therapeutics Inc.	HARP	MPM BioVentures 2014 L.P. MPM ASSET MANAGEMENT LLC MPM BioVentures 2014 (B) L.P. MPM Asset Management Investors BV2014 LLC MPM BioVentures 2014 LLC MPM BioVentures 2014 GP LLC Foley Todd GADICKE ANSBERT EVNIN LUKE 10% Owner	721,194	$20.02	$14,441,349	7,531,552 (Indirect)	View
2021-01-20 Sale	2021-01-22 8:16 pm	Harpoon Therapeutics Inc.	HARP	MPM BioVentures 2014 L.P. MPM ASSET MANAGEMENT LLC MPM BioVentures 2014 (B) L.P. MPM Asset Management Investors BV2014 LLC MPM BioVentures 2014 LLC MPM BioVentures 2014 GP LLC Foley Todd GADICKE ANSBERT EVNIN LUKE 10% Owner	68,455	$22.51	$1,540,761	8,354,392 (Indirect)	View

Stock options: Exercise, Award, Grant, Conversion

Transaction Date	Reported DateTime	Exercisable Expiration	Company	Symnbol	Insider Relationship	Shares Traded	Conversion Price	Shares Owned	Filing
2025-03-27 Exercise	2025-04-30 4:08 pm	N/A 2025-04-09	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	50,873	$0	6,718,670 (Indirect)	View
2025-03-27 Exercise	2025-04-30 4:08 pm	N/A N/A	Werewolf Therapeutics Inc.	HOWL	GADICKE ANSBERT MPM ONCOLOGY INNOVATIONS FUND LP UBS Oncology Impact Fund L.P. Oncology Impact Fund (Cayman) Management L.P. MPM BioImpact LLC MPM Oncology Innovations Fund GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	50,873	$0.09	6,718,670 (Indirect)	View
2023-06-01 Other	2023-06-05 4:36 pm	N/A N/A	TCR2 THERAPEUTICS INC.	TCRR	MPM BioVentures 2014 L.P. Foley Todd EVNIN LUKE MPM BioVentures 2014 (B) L.P. MPM Asset Management Investors BV2014 LLC MPM BioVentures 2014 LLC MPM BioVentures 2014 GP LLC MPM ASSET MANAGEMENT LLC 10% Owner	4,158,964	$0	4,158,964 (Indirect)	View
2023-05-22 Exercise	2023-05-24 4:39 pm	2016-12-13 2026-12-12	TCR2 THERAPEUTICS INC.	TCRR	MPM ASSET MANAGEMENT LLC EVNIN LUKE 10% Owner	178,269	$0	3,674,978 (Direct)	View
2023-05-22 Exercise	2023-05-24 4:39 pm	N/A N/A	TCR2 THERAPEUTICS INC.	TCRR	MPM ASSET MANAGEMENT LLC EVNIN LUKE 10% Owner	178,269	$0.74	3,674,978 (Direct)	View
2021-01-20 Other	2021-01-22 8:16 pm	N/A N/A	Harpoon Therapeutics Inc.	HARP	MPM BioVentures 2014 L.P. MPM ASSET MANAGEMENT LLC MPM BioVentures 2014 (B) L.P. MPM Asset Management Investors BV2014 LLC MPM BioVentures 2014 LLC MPM BioVentures 2014 GP LLC Foley Todd GADICKE ANSBERT EVNIN LUKE 10% Owner	101,646	$0	8,354,392 (Indirect)	View

MPM ASSET MANAGEMENT LLC - Insider Trading & Ownership