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MPM BioImpact LLC insider trades
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MPM BioImpact LLC insider trades

MPM BioImpact LLC has filed 10 Form 4s with the SEC that we hold, for Cullinan Therapeutics, Inc. (CGEM) (10% owner), ITOS (Reporting owner) and Werewolf Therapeutics, Inc. (HOWL) (Reporting owner). Across all of them we count 0 purchases worth $0 and 29 sales worth $19.9M reported on Form 4. In the last 12 months: 0 purchases ($0) and 6 sales ($479.1K). The largest single trade was a sale of 1,031,931 shares of ITOS worth $8.3M, dated 2025-05-13. The first filing on our record is dated 2021-09-08 and the latest 2025-12-04.

Cullinan Therapeutics, Inc. (CGEM)

10% owner · 4 filings · 9 purchases and sales
Trade dateCodeSharesValue as filedFiled
2021-09-03S, sale reported on Form 412,731$376.8K2021-09-08
2021-09-07S, sale reported on Form 425,067$727.9K2021-09-08
2021-09-08S, sale reported on Form 410,842$315.6K2021-09-08
2021-09-09S, sale reported on Form 413,727$402.9K2021-09-13
2021-09-10S, sale reported on Form 45,931$172.2K2021-09-13
2021-09-13S, sale reported on Form 43,595$104.6K2021-09-13
2021-09-14S, sale reported on Form 47,106$207.3K2021-09-16
2021-09-15S, sale reported on Form 46,425$187.4K2021-09-16
2021-09-16S, sale reported on Form 43,124$90.8K2021-09-20

ITOS

Reporting owner · 4 filings · 14 purchases and sales
Trade dateCodeSharesValue as filedFiled
2021-09-09S, sale reported on Form 438,028$1.1M2021-09-13
2021-09-10S, sale reported on Form 411,330$325.5K2021-09-13
2021-09-10S, sale reported on Form 411,313$315.2K2021-09-13
2021-09-13S, sale reported on Form 435,785$989.1K2021-09-13
2021-09-28S, sale reported on Form 432,154$868.2K2021-09-30
2021-09-30S, sale reported on Form 43,836$103.6K2021-09-30
2021-11-30S, sale reported on Form 49,809$339.6K2021-12-02
2021-11-30S, sale reported on Form 446,992$1.7M2021-12-02
2021-12-01S, sale reported on Form 410,111$342.0K2021-12-02
2021-12-01S, sale reported on Form 41,500$53.0K2021-12-02
2021-12-01S, sale reported on Form 49,131$316.0K2021-12-02
2021-12-02S, sale reported on Form 412,434$433.1K2021-12-02
2021-12-02S, sale reported on Form 449,796$1.7M2021-12-02
2025-05-13S, sale reported on Form 41,031,931$8.3M2025-05-15

Werewolf Therapeutics, Inc. (HOWL)

Reporting owner · 2 filings · 6 purchases and sales
Trade dateCodeSharesValue as filedFiled
2025-11-04S, sale reported on Form 4140,488$171.4K2025-11-06
2025-11-05S, sale reported on Form 447,950$58.5K2025-11-06
2025-11-06S, sale reported on Form 454,452$65.9K2025-11-06
2025-12-02S, sale reported on Form 459,277$52.8K2025-12-04
2025-12-03S, sale reported on Form 457,225$49.8K2025-12-04
2025-12-04S, sale reported on Form 483,230$80.7K2025-12-04
Source

Counted from the Form 4 filings this reporting owner (SEC CIK 1687078) filed on EDGAR. Values are the transaction values as filed. See every filing on EDGAR, or browse insider buying and today's insider purchases.

Source: U.S. Securities and Exchange Commission (EDGAR) and other official government data · Updated 2026-10-12 · For informational purposes only, not investment advice.
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