Cormorant Asset Management, LP
CIK 1583977 · last filed 2026-08-10
Cormorant Asset Management, LP is a corporate insider who has filed 15 SEC Form 4 insider transactions across 12 companies since 2017. The most recent filing, for BLSM, was dated Aug 10, 2026. Across all open-market trades the lifetime net is +$384.7M, making them a net buyer over the disclosed history. Current disclosed insider exposure totals $225.4M across reported positions. The firm reports its address in Boston, MA. 118 SEC filings were submitted jointly with Bihua Chen.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$225.43M
12
15
$384.67M
Filer Profile
50TH FLOOR
BOSTON, MA 02116
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| BlossomHill Therapeutics, Inc. (BLSM) Delisted | 10%+ Owner | 3,301,534 | — | — | $30.00M | 1 | 2026-08-10 |
| CRBP | 10%+ Owner | 2,344,971 | $8.12 | $19.04M | $68.95M | 2 | 2025-12-15 |
| GreenLight Biosciences Holdings, PBC (GRNAW) Delisted | 0 | $0.02 | $0 | $0 | 1 | 2023-07-24 | |
| BMEA | Director | 3,170,872 | $1.74 | $5.52M | $61.20M | 3 | 2022-06-24 |
| Ventyx Biosciences, Inc. (VTYX) Delisted | 1,410,303 | $13.99 | $19.73M | $40.00M | 1 | 2021-10-27 | |
| Icosavax, Inc. (ICVX) Delisted | 426,393 | $15.31 | $6.53M | $0 | 1 | 2021-08-04 | |
| ERAS | 10%+ Owner | 10,505,553 | $15.88 | $166.83M | $60.80M | 1 | 2021-07-22 |
| Jade Biosciences, Inc. (AVTE) Delisted | 58,020 | $93.80 | $5.44M | $28.00M | 1 | 2021-07-07 | |
| Elevation Oncology, Inc. (ELEV) Delisted | 2,233,168 | $0.36 | $815.1K | $16.00M | 1 | 2021-07-01 | |
| AVIR | 6,411,355 | $5.31 | $34.04M | $0 | 1 | 2020-11-05 | |
| Akouos, Inc. (AKUS) Delisted | 499,989 | $13.29 | $6.64M | $19.72M | 1 | 2020-07-02 | |
| Apellis Pharmaceuticals, Inc. (APLS) Delisted | 10%+ Owner | 2,402,497 | $41.03 | $98.57M | $60.00M | 1 | 2017-11-14 |
Recent Filings
15 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-08-10 | BlossomHill Therapeutics, Inc. (BLSM) Delisted | Mixed | +21,684,204 | $30.00M | EDGAR |
| 2025-12-15 | CRBP | Sell (S) | −90,087 | -$1.03M | EDGAR |
| 2024-03-11 | CRBP | Buy (P) | +1,650,000 | $69.98M | EDGAR |
| 2023-07-24 | GreenLight Biosciences Holdings, PBC (GRNAW) Delisted | Sell (S) | −36,754,636 | $0 | EDGAR |
| 2022-06-24 | BMEA | Grant (A) | — | $0 | EDGAR |
| 2021-10-27 | Ventyx Biosciences, Inc. (VTYX) Delisted | Mixed | +5,641,212 | $40.00M | EDGAR |
| 2021-08-04 | Icosavax, Inc. (ICVX) Delisted | Conv (C) | +1,705,572 | $0 | EDGAR |
| 2021-07-22 | ERAS | Mixed | +42,022,212 | $60.80M | EDGAR |
| 2021-07-07 | Jade Biosciences, Inc. (AVTE) Delisted | Mixed | +8,122,764 | $28.00M | EDGAR |
| 2021-07-01 | Elevation Oncology, Inc. (ELEV) Delisted | Mixed | +8,932,672 | $16.00M | EDGAR |
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.