MPM Asset Management LLC
- SEC CIK
- 0001263048
In the past year, 1 open-market purchase filing worth $20.0M and 9 sale filings worth $2.22M.
Current role at each company
- AKTS Aktis Oncology, Inc.10% Owneras of Jan 14, 2026
- HOWL Werewolf Therapeutics, Inc.Other: Former 10% Owneras of Dec 4, 2025
- TCRR TCR2 Therapeutics Inc.10% Owneras of Jun 5, 2023
Open-market trades in the past year
Open-market purchases (P) and sales (S) filed in the last 365 days, not counting derivative securities or duplicate filings. Values leave out price outliers.
- Bought
- $20.0M
- 1 filing
- Sold
- $2.22M
- 9 filings
- Net
- +$17.8M
- Bought minus sold
- Companies
- 2
- With open-market trades
Trades
Every Form 4 that lists MPM Asset Management LLC as a reporting owner, including filings made jointly with others, grouped by company. Each row adds up one type of transaction in one filing. Only open-market purchases (P) and sales (S) are shown by default.
AKTS Aktis Oncology, Inc.
10% Owner1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Jan 14, 2026 (view filing)6:17 PM ET | Jan 12 | 2 days | Gadicke Ansbert and 2 others10% Owner | PPurchase | +1.11M | $18.00 | +$20.0M | +12.2%10.3M after |
HOWL Werewolf Therapeutics, Inc.
Other: Former 10% Owner10 trades
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| Dec 4, 2025 (view filing)6:18 PM ET | Dec 2-4 | 2 days | Gadicke Ansbert and 6 othersOther: Former 10% Owner | SSale | −199.7K | $0.9176 | −$183.3K | −4.0%4.78M after | 3 lots10b5-1 |
| Dec 1, 2025 (view filing)6:11 PM ET | Nov 26-Dec 1 | 5 days | Gadicke Ansbert and 6 others10% Owner | SSale | −141.9K | $0.9643 | −$136.9K | −2.8%4.98M after | 3 lots10b5-1 |
| Nov 25, 2025 (view filing)6:03 PM ET | Nov 21-25 | 4 days | Gadicke Ansbert and 6 others10% Owner | SSale | −195.7K | $0.9176 | −$179.6K | −3.7%5.13M after | 3 lots10b5-1 |
| Nov 20, 2025 (view filing)5:50 PM ET | Nov 18-20 | 2 days | Gadicke Ansbert and 6 others10% Owner | SSale | −160.1K | $0.9239 | −$147.9K | −2.9%5.32M after | 3 lots10b5-1 |
| Nov 17, 2025 (view filing)7:20 PM ET | Nov 13-17 | 4 days | Gadicke Ansbert and 6 others10% Owner | SSale | −209.7K | $0.9571 | −$200.7K | −3.7%5.48M after | 3 lots10b5-1 |
| Nov 12, 2025 (view filing)7:31 PM ET | Nov 7-12 | 5 days | Gadicke Ansbert and 6 others10% Owner | SSale | −213.5K | $1.13 | −$241.3K | −3.6%5.69M after | 4 lots10b5-1 |
| Nov 6, 2025 (view filing)7:40 PM ET | Nov 4-6 | 2 days | Gadicke Ansbert and 6 others10% Owner | SSale | −242.9K | $1.22 | −$295.8K | −4.0%5.90M after | 3 lots10b5-1 |
| Nov 3, 2025 (view filing)7:07 PM ET | Oct 30-Nov 3 | 4 days | Gadicke Ansbert and 6 others10% Owner | SSale | −295.0K | $1.33 | −$391.6K | −4.6%6.15M after | 3 lots10b5-1 |
| Oct 29, 2025 (view filing)7:21 PM ET | Oct 27-29 | 2 days | Gadicke Ansbert and 6 others10% Owner | SSale | −276.0K | $1.62 | −$446.4K | −4.1%6.44M after | 3 lots10b5-1 |
| Apr 30, 2025 (view filing)4:08 PM ET | Mar 27 | 34 daysLate | Gadicke Ansbert and 6 others10% Owner | SSale | −4.39K | $1.05 | −$4.61K | −0.1%6.72M after |
TCRR TCR2 Therapeutics Inc.
10% Owner1 trade
| Filed (ET) | Trade date | Filing delay | Insider | Transaction | Shares | Avg price | Value | Holding change | Flags |
|---|---|---|---|---|---|---|---|---|---|
| May 24, 2023 (view filing)4:39 PM ET | May 22 | 2 days | Evnin Luke and 1 other10% Owner | SSale | −70.2K | $1.88 | −$131.9K | −18.8%304.0K after | Duplicate filing |