EcoR1 Capital, LLC
Top Portfolio Positions
28 positions ·
$2,359,197,078 total
· as of Mar 31, 2026
| Ticker | Company | Shares | Value (USD) | % of Portfolio | Open |
|---|---|---|---|---|---|
| ZYME |
Zymeworks Inc.
Healthcare
|
22,970,388 | $575,178,515 | 24.38% | |
| ANAB |
Anaptysbio, Inc
Healthcare
|
7,880,094 | $437,030,013 | 18.52% | |
| JAZZ |
Jazz Pharmaceuticals plc
Healthcare
|
1,706,469 | $322,607,964 | 13.67% | |
| CNTA |
Centessa Pharmaceuticals plc
Healthcare
|
6,410,800 | $254,636,976 | 10.79% | |
| CRNX |
Crinetics Pharmaceuticals, Inc.
Healthcare
|
4,288,120 | $155,744,518 | 6.60% | |
| AKTS |
Aktis Oncology, Inc.
Healthcare
|
4,824,469 | $86,309,750 | 3.66% | |
| ORIC |
Oric Pharmaceuticals, Inc.
Healthcare
|
6,728,116 | $85,245,229 | 3.61% | |
| CGON |
CG Oncology, Inc.
Healthcare
|
1,102,000 | $74,583,360 | 3.16% | |
| CRSP |
CRISPR Therapeutics AG
Healthcare
|
1,389,276 | $66,087,859 | 2.80% | |
| ETON |
Eton Pharmaceuticals, Inc.
Healthcare
|
2,171,938 | $53,603,429 | 2.27% |
Portfolio Trend
25 quarters · across all stocks
Holdings in XNCR
Shares Held
Position Value (USD)
26 quarters on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $26,326,980 | 2,183,000 | Shares | Sole | 2026-05-15 | |
| 2025-12-31 | $1,033,425 | 67,500 | Call | Sole | 2026-02-17 | |
| 2025-12-31 | $49,774,524 | 3,251,112 | Shares | Sole | 2026-02-17 | |
| 2025-09-30 | $72,078,116 | 6,144,767 | Shares | Sole | 2025-11-14 | |
| 2025-06-30 | $48,297,868 | 6,144,767 | Shares | Sole | 2025-08-14 | |
| 2025-03-31 | $65,380,320 | 6,144,767 | Shares | Sole | 2025-05-15 | |
| 2024-12-31 | $141,206,745 | 6,144,767 | Shares | Sole | 2025-02-14 | |
| 2024-09-30 | $107,194,665 | 5,330,416 | Shares | Sole | 2024-11-14 | |
| 2024-06-30 | $100,904,774 | 5,330,416 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $117,962,106 | 5,330,416 | Shares | Sole | 2024-05-15 | |
| 2023-12-31 | $112,147,814 | 5,282,516 | Shares | Sole | 2024-02-14 | |
| 2023-09-30 | $106,442,697 | 5,282,516 | Shares | Sole | 2023-11-14 | |
| 2023-06-30 | $131,904,424 | 5,282,516 | Shares | Sole | 2023-08-14 | |
| 2023-03-31 | $147,329,371 | 5,282,516 | Shares | Sole | 2023-05-15 | |
| 2022-12-31 | $137,556,716 | 5,282,516 | Shares | Sole | 2023-02-14 | |
| 2022-09-30 | $137,239,765 | 5,282,516 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $144,579,725 | 5,282,416 | Shares | Sole | 2022-08-15 | |
| 2022-03-31 | $132,566,410 | 4,968,756 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $196,832,972 | 4,906,106 | Shares | Sole | 2022-02-14 | |
| 2021-09-30 | $160,233,421 | 4,906,106 | Shares | Sole | 2021-11-22 | |
| 2021-06-30 | $169,211,595 | 4,906,106 | Shares | Sole | 2021-08-16 | |
| 2021-03-31 | $211,007,176 | 4,900,306 | Shares | Sole | 2021-05-17 | |
| 2020-12-31 | $198,388,751 | 4,547,072 | Shares | Sole | 2021-02-16 | |
| 2020-09-30 | $176,380,922 | 4,547,072 | Shares | Sole | 2020-11-16 | |
| 2020-06-30 | $147,279,662 | 4,547,072 | Shares | Sole | 2020-08-14 | |
| 2020-03-31 | $74,746,523 | 2,501,557 | Shares | Sole | 2020-05-15 | |
| No 13F history on record for this holder in this stock. | ||||||