EcoR1 Capital, LLC
CIK 1587114 · Holdings on Mar 31, 2024 · First reported May 15, 2024
Top ten holdings
Q1 2024- APLS16.95%
- PRTA7.29%
- ARVN7.05%
- SRPT6.31%
- CRNX4.94%
- LKFT4.71%
- ANAB4.30%
- ZYME3.59%
- KURA3.14%
- JAZZ3.10%
Share classes counted separately61.38%
Portfolio value by quarter
What changed this quarter?
Within preview · weight change- SRPTWeight increased · +4.22 pp2.09% → 6.31%Shares +1.09M (+130.50%)
- PRTAWeight decreased · -3.64 pp10.93% → 7.29%Shares 0 (0.00%)
- CRNXWeight increased · +3.08 pp1.86% → 4.94%Shares +2.14M (+106.48%)
Weight = security value ÷ total reported holdings value. Changes are in percentage points; price moves also affect weights, so they are not trade sizes.
Top 10 holdings 28
USD · B = billion · M = million; expand a row for exact values| # | Security | Value | Weight | Quantity | Weight / quantity change | Activity | |
|---|---|---|---|---|---|---|---|
| 01 | APLSAPELLIS PHARMACEUTICALS INC View history and evidence | $667.59M | 16.95% | 11.36M shares | 17.37% → 16.95%-0.42 pp +184.36K (+1.65%) | Added | ↗▾ |
| 02 | PRTAPROTHENA CORP PLCSHS View history and evidence | $286.94M | 7.29% | 11.58M shares | 10.93% → 7.29%-3.64 pp 0 (0.00%) | Unchanged | ↗▾ |
| 03 | ARVNARVINAS INC View history and evidence | $277.67M | 7.05% | 6.73M shares | 7.19% → 7.05%-0.14 pp 0 (0.00%) | Unchanged | ↗▾ |
| 04 | SRPTSAREPTA THERAPEUTICS INC View history and evidence | $248.54M | 6.31% | 1.92M shares | 2.09% → 6.31%+4.22 pp +1.09M (+130.50%) | Added | ↗▾ |
| 05 | CRNXCRINETICS PHARMACEUTICALS IN View history and evidence | $194.51M | 4.94% | 4.16M shares | 1.86% → 4.94%+3.08 pp +2.14M (+106.48%) | Added | ↗▾ |
| 06 | LKFTLAKEFRONT BIOTHERAPEUTIC-ADRSPON ADR View history and evidence | $185.35M | 4.71% | 5.76M shares | 6.08% → 4.71%-1.37 pp 0 (0.00%) | Unchanged | ↗▾ |
| 07 | ANABANAPTYSBIO INC View history and evidence | $169.37M | 4.30% | 7.52M shares | 4.18% → 4.30%+0.12 pp 0 (0.00%) | Unchanged | ↗▾ |
| 08 | ZYMEZYMEWORKS INC View history and evidence | $141.36M | 3.59% | 13.44M shares | 3.62% → 3.59%-0.03 pp 0 (0.00%) | Unchanged | ↗▾ |
| 09 | KURAKURA ONCOLOGY INC View history and evidence | $123.86M | 3.14% | 5.81M shares | 2.17% → 3.14%+0.97 pp 0 (0.00%) | Unchanged | ↗▾ |
| 10 | JAZZJAZZ PHARMACEUTICALS PLCSHS USD View history and evidence | $122.10M | 3.10% | 1.01M shares | 3.24% → 3.10%-0.14 pp 0 (0.00%) | Unchanged | ↗▾ |
Options overlay 2
$15.20M notionalPut and Call positions are separate. Notional is based on underlying securities, not option premium, market value or net exposure. Quantities are underlying shares.
| Security | Put / Call | Underlying shares | Notional | Quantity change | |
|---|---|---|---|---|---|
KURAKURA ONCOLOGY INC View history and evidence | Call | 700.00K | $14.93M | +700.00K | ▾ |
KODKODIAK SCIENCES INC View history and evidence | Call | 51.10K | $268.79K | +51.10K | ▾ |
2 / 2 options · preview only
Exited positions 10
| Security | Type | Shares out | Value out | Previous filing | This filing |
|---|---|---|---|---|---|
| MRTX MIRATI THERAPEUTICS INC | Non-derivative | -7,396,979 | -$434.57M | SEC filing ↗ | SEC filing ↗ |
| ARGX ARGENX SE - ADR | Non-derivative | -300,997 | -$114.51M | SEC filing ↗ | SEC filing ↗ |
| GRPH GRAPHITE BIO INC | Non-derivative | -8,538,446 | -$22.37M | SEC filing ↗ | SEC filing ↗ |
3 / 10 preview exits. Up to 30 exit records are previewed. Exit means absent from the current filing; execution date, price and proceeds are unknown.
Every number has a source.
CIK 1587114 · Period 2024-03-31
Data loaded 2026-09-23 · First reported 2024-05-15
Amendments and versions
{
"amendments_merged": null,
"prior_versions": null,
"cover_table_value": 3953710314
}Research all 59 reported holdings.
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