MPM Asset Management LLC
CIK 0001263048 Name as filed on the most recent filing
Filed as MPM Asset Management LLC (35)
86 transaction lines · from 35 filings · filed 2003-09-09 to 2026-01-14 The span is the filing dates this catalog holds, not the entity's full filing history. Absence here is not evidence of absence at the SEC.
A line appears here when the filing that carries it names this CIK as a reporting owner, not only when the parser picked this CIK as the line's primary owner. That is why a joint filing appears on both owners' pages rather than vanishing from the second one. The catalog never merges two CIKs into one person and never splits one CIK into two: identity here is the SEC's own identifier and nothing else.
Issuers this insider has filed against
Ordered by last-seen filing date, newest first. Roles are as filed on the Form 4 and are not normalised.
This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-20 05:22 UTC.
- ISSUER Aktis Oncology, Inc. 1 filings
- ISSUER Werewolf Therapeutics, Inc. 10 filings
- ISSUER Tcr2 Therapeutics Inc. 2 filings
- ISSUER Harpoon Therapeutics, Inc. 8 filings
- ISSUER Oncorus, Inc. 1 filings
- ISSUER Zalicus Inc. 10 filings
- ISSUER Idenix Pharmaceuticals Inc 1 filings
- ISSUER Sonic Innovations Inc 2 filings
No issuer is recorded
The catalog holds no filing linking this CIK to an issuer.
Transactions
Every stored Form 4 line naming this reporting owner, newest transaction date first. Each row links to the filing it came from.
4 transactions · Newest transaction date first, id breaking the tie.
This container could not be filled from the store. It is showing nothing because a read failed, not because no insider filed: those are different facts and this catalog will not let one stand in for the other. The last ingest the store recorded was 2026-08-20 05:22 UTC.
| Direction | Date | Issuer | Code | Shares | Price | Value USD | Filing |
|---|---|---|---|---|---|---|---|
| 2026-01-12 |
Aktis Oncology, Inc. AKTS |
P, Open-market purchase | 1,112,777 acquired | 18.00 | 20,029,986.00 | Form 4, filing 0001231919-26-000055 | |
| 2025-12-04 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 83,230 disposed | 0.97 | 80,733.10 | Form 4, filing 0001231919-25-000574 | |
| 2025-12-03 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 57,225 disposed | 0.87 | 49,785.75 | Form 4, filing 0001231919-25-000574 | |
| 2025-12-02 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 59,277 disposed | 0.89 | 52,756.53 | Form 4, filing 0001231919-25-000574 | |
| 2025-12-01 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 60,917 disposed | 0.94 | 57,261.98 | Form 4, filing 0001231919-25-000564 | |
| 2025-11-28 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 20,277 disposed | 0.99 | 20,074.23 | Form 4, filing 0001231919-25-000564 | |
| 2025-11-26 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 60,733 disposed | 0.98 | 59,518.34 | Form 4, filing 0001231919-25-000564 | |
| 2025-11-25 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 42,533 disposed | 0.92 | 39,130.36 | Form 4, filing 0001231919-25-000550 | |
| 2025-11-24 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 88,802 disposed | 0.98 | 87,025.96 | Form 4, filing 0001231919-25-000550 | |
| 2025-11-21 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 64,331 disposed | 0.83 | 53,394.73 | Form 4, filing 0001231919-25-000550 | |
| 2025-11-20 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 41,152 disposed | 0.89 | 36,625.28 | Form 4, filing 0001231919-25-000533 | |
| 2025-11-19 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 66,324 disposed | 0.94 | 62,344.56 | Form 4, filing 0001231919-25-000533 | |
| 2025-11-18 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 52,627 disposed | 0.93 | 48,943.11 | Form 4, filing 0001231919-25-000533 | |
| 2025-11-17 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 57,061 disposed | 0.95 | 54,207.95 | Form 4, filing 0001231919-25-000507 | |
| 2025-11-14 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 61,640 disposed | 0.93 | 57,325.20 | Form 4, filing 0001231919-25-000507 | |
| 2025-11-13 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 90,951 disposed | 0.98 | 89,131.98 | Form 4, filing 0001231919-25-000507 | |
| 2025-11-12 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 40,669 disposed | 1.09 | 44,329.21 | Form 4, filing 0001231919-25-000459 | |
| 2025-11-11 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 55,810 disposed | 1.14 | 63,623.40 | Form 4, filing 0001231919-25-000459 | |
| 2025-11-10 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 48,570 disposed | 1.18 | 57,312.60 | Form 4, filing 0001231919-25-000459 | |
| 2025-11-07 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 68,480 disposed | 1.11 | 76,012.80 | Form 4, filing 0001231919-25-000459 | |
| 2025-11-06 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 54,452 disposed | 1.21 | 65,886.92 | Form 4, filing 0001231919-25-000439 | |
| 2025-11-05 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 47,950 disposed | 1.22 | 58,499.00 | Form 4, filing 0001231919-25-000439 | |
| 2025-11-04 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 140,488 disposed | 1.22 | 171,395.36 | Form 4, filing 0001231919-25-000439 | |
| 2025-11-03 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 94,063 disposed | 1.29 | 121,341.27 | Form 4, filing 0001231919-25-000404 | |
| 2025-10-31 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 114,044 disposed | 1.28 | 145,976.32 | Form 4, filing 0001231919-25-000404 | |
| 2025-10-30 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 86,936 disposed | 1.43 | 124,318.48 | Form 4, filing 0001231919-25-000404 | |
| 2025-10-29 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 134,240 disposed | 1.55 | 208,072.00 | Form 4, filing 0001231919-25-000373 | |
| 2025-10-28 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 69,068 disposed | 1.64 | 113,271.52 | Form 4, filing 0001231919-25-000373 | |
| 2025-10-27 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 72,709 disposed | 1.72 | 125,059.48 | Form 4, filing 0001231919-25-000373 | |
| 2025-03-27 |
Werewolf Therapeutics, Inc. HOWL |
S, Open-market sale | 4,386 disposed | 1.05 | 4,605.30 | Form 4, filing 0001415889-25-011569 | |
| 2023-05-22 |
Tcr2 Therapeutics Inc. TCRR |
S, Open-market sale | 70,170 disposed | 1.88 | 131,919.60 | Form 4, filing 0001209191-23-031889 | |
| 2021-04-15 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 1,052 disposed | 20.49 | 21,555.48 | Form 4, filing 0001209191-21-026881 | |
| 2021-04-14 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 1,550 disposed | 20.83 | 32,286.50 | Form 4, filing 0001209191-21-026881 | |
| 2021-04-14 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 121 disposed | 20.06 | 2,427.26 | Form 4, filing 0001209191-21-026881 | |
| 2021-04-13 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 1,657 disposed | 19.35 | 32,062.95 | Form 4, filing 0001209191-21-026881 | |
| 2021-04-13 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 286 disposed | 20.08 | 5,742.88 | Form 4, filing 0001209191-21-026881 | |
| 2021-04-12 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 1,637 disposed | 20.72 | 33,918.64 | Form 4, filing 0001209191-21-026429 | |
| 2021-04-12 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 811 disposed | 21.52 | 17,452.72 | Form 4, filing 0001209191-21-026429 | |
| 2021-04-12 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 48 disposed | 22.68 | 1,088.64 | Form 4, filing 0001209191-21-026429 | |
| 2021-04-09 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 10,300 disposed | 23.67 | 243,801.00 | Form 4, filing 0001209191-21-026429 | |
| 2021-02-10 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 183,051 disposed | 20.00 | 3,661,020.00 | Form 4, filing 0001209191-21-010209 | |
| 2021-02-09 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 9,400 disposed | 20.25 | 190,350.00 | Form 4, filing 0001209191-21-008935 | |
| 2021-02-08 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 72,128 disposed | 20.04 | 1,445,445.12 | Form 4, filing 0001209191-21-008935 | |
| 2021-02-05 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 10,172 disposed | 20.01 | 203,541.72 | Form 4, filing 0001209191-21-008935 | |
| 2021-02-04 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 29,730 disposed | 20.37 | 605,600.10 | Form 4, filing 0001209191-21-007900 | |
| 2021-02-03 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 41,922 disposed | 20.21 | 847,243.62 | Form 4, filing 0001209191-21-007900 | |
| 2021-02-02 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 48,421 disposed | 20.13 | 974,714.73 | Form 4, filing 0001209191-21-007900 | |
| 2021-01-27 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 706,825 disposed | 20.00 | 14,136,500.00 | Form 4, filing 0001209191-21-005787 | |
| 2021-01-26 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 1,363 disposed | 21.08 | 28,732.04 | Form 4, filing 0001209191-21-005787 | |
| 2021-01-25 |
Harpoon Therapeutics, Inc. HARP |
S, Open-market sale | 13,006 disposed | 21.23 | 276,117.38 | Form 4, filing 0001209191-21-005787 |
This column is intentionally blank
No transaction line is stored for this reporting owner, though the catalog holds filings naming them. That happens when the filings report only holdings or only positions the store does not carry, and when a parse failed; each filing page states its own parse status.
- P, Open-market purchase
- Open-market purchase
- S, Open-market sale
- Open-market sale
Every value is as reported on the Form 4. A price the filing did not report is marked Not reported and no value is computed from it. Codes outside the open market, drawn in grey behind a dashed rule, are compensation and administrative machinery rather than a decision to trade at the prevailing price.
What this insider's stored lines contain
Exact counts over every stored line for this entity. This is a statement of composition, not a filter: the only filter this page offers is the open-market one above, because that is the only one an index serves today.
- Open-market purchase 0
- Open-market sale 4
- Option exercise 0
- Grant or award 0
- Tax withholding 0
- Disposition to the issuer 0
- In-the-money option exercise 0
How to cite this page
ebomi catalog. MPM ASSET MANAGEMENT LLC, insider transactions. Retrieved 2026-08-21 from https://ebomi.com/insider/0001263048
Balogh, A. Insider trading. Scientific Data 10, 237 (2023) doi:10.1038/s41597-023-02147-6