MPM Asset Management LLC
- SEC CIK
- 0001263048
- Latest filing
- Nov 14, 2025
Holdings in Q3 2021
Holdings as of Sep 30, 2021, filed Nov 15, 2021. Long positions only; changes compare share counts with Q2 2021.
- Positions
- 9
- 0 vs. Q2 2021
- Portfolio value
- $431.5M
- −$106.4M (−19.8%) vs. Q2 2021
| Security | Class | Shares | Value | % of portfolio | Share change | Action | History |
|---|---|---|---|---|---|---|---|
| ITOSiTeos Therapeutics, Inc. | COM | 3,290,711 | $88.8M | 20.6% | −375,076−10.2% | Reduced | History |
| DYNDyne Therapeutics, Inc. | COM | 4,951,303 | $80.4M | 18.6% | 00.0% | Unchanged | History |
| HOWLWerewolf Therapeutics, Inc. | COM | 4,284,172 | $73.5M | 17.0% | 00.0% | Unchanged | History |
| RPTXRepare Therapeutics Inc. | COM | 2,242,636 | $58.8M | 13.6% | −28,541−1.3% | Reduced | History |
| TCRRTCR2 Therapeutics Inc. | COM | 4,050,865 | $34.5M | 8.0% | 00.0% | Unchanged | History |
| Amryt Pharma PLC03217L106 | SPONSORED ADS | 2,668,845 | $32.2M | 7.5% | +2,668,845 | New | – |
| ONCROncorus, Inc. | COM | 2,849,464 | $26.6M | 6.2% | 00.0% | Unchanged | History |
| HARPHarpoon Therapeutics, Inc. | COM | 3,131,388 | $24.7M | 5.7% | +1,1210.0% | Added | History |
| RYTMRhythm Pharmaceuticals, Inc. | COM | 909,258 | $11.9M | 2.8% | 00.0% | Unchanged | History |
Sold out since Q2 2021 (1)
Positions held at the end of Q2 2021 that are gone from this filing.
| Security | Class | Shares in Q2 2021 | Value in Q2 2021 | % of portfolio in Q2 2021 | History |
|---|---|---|---|---|---|
| Chiasma, Inc16706W102 | COM | 5,736,296 | $27.1M | 5.0% | – |