Q2 2023 · 13F-HR
EcoR1 Capital, LLCholdings as filed
Filed 2023-08-14 · accession 0000935836-23-000570
$4.08B
Reported value
53
Positions
2023-06-30
Period end
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| G72800108 | PRTA | PROTHENA CORP PLC | $791.0M | 19.4% | 11,584,280 | Common | SOLE |
| 03753U106 | APLSUSD | APELLIS PHARMACEUTICALS INC | $496.6M | 12.2% | 5,451,647 | Common | SOLE |
| 803607100 | SRPT | SAREPTA THERAPEUTICS INC | $419.2M | 10.3% | 3,660,798 | Common | SOLE |
| 478160104 | JNJ | JOHNSON & JOHNSON | $281.4M | 6.89% | 1,700,000 | CALL | SOLE |
| 36315X101 | LKFT | GALAPAGOS NV | $234.0M | 5.73% | 5,756,268 | Common | SOLE |
| 61775R105 | MORFUSD | MORPHIC HLDG INC | $220.5M | 5.40% | 3,846,964 | Common | SOLE |
| 76155X100 | RVMD | REVOLUTION MEDICINES INC | $192.6M | 4.72% | 7,198,700 | Common | SOLE |
| 032724106 | ANAB | ANAPTYSBIO INC | $153.0M | 3.75% | 7,521,024 | Common | SOLE |
| 004225108 | ACAD | ACADIA PHARMACEUTICALS INC | $143.5M | 3.52% | 5,991,479 | Common | SOLE |
| 98401F105 | XNCR | XENCOR INC | $131.9M | 3.23% | 5,282,516 | Common | SOLE |
| 98985Y108 | ZYME | ZYMEWORKS INC | $116.1M | 2.84% | 13,437,473 | Common | SOLE |
| 09627Y109 | 2655787D | BLUEPRINT MEDICINES CORP | $113.7M | 2.78% | 1,798,300 | Common | SOLE |
| 04335A105 | ARVN | ARVINAS INC | $99.7M | 2.44% | 4,017,788 | Common | SOLE |
| 85205L107 | SWTXUSD | SPRINGWORKS THERAPEUTICS INC | $90.7M | 2.22% | 3,460,208 | Common | SOLE |
| 50127T109 | KURA | KURA ONCOLOGY INC | $61.4M | 1.51% | 5,806,871 | Common | SOLE |
| 75943R102 | RLAY | RELAY THERAPEUTICS INC | $52.3M | 1.28% | 4,163,824 | Common | SOLE |
| G50871105 | JAZZ | JAZZ PHARMACEUTICALS PLC | $45.7M | 1.12% | 368,411 | Common | SOLE |
| 92915B106 | VYGR | VOYAGER THERAPEUTICS INC | $44.1M | 1.08% | 3,851,507 | Common | SOLE |
| 152309100 | CNTA | CENTESSA PHARMACEUTICALS PLC | $34.8M | 0.85% | 5,618,779 | Common | SOLE |
| 28036F105 | EWTX | EDGEWISE THERAPEUTICS INC | $27.1M | 0.66% | 3,493,194 | Common | SOLE |
| 68622P109 | ORIC | ORIC PHARMACEUTICALS INC | $26.5M | 0.65% | 3,418,068 | Common | SOLE |
| 04683R106 | AVIR | ATEA PHARMACEUTICALS INC | $26.2M | 0.64% | 6,995,861 | Common | SOLE |
| 67080N101 | NUVB | NUVATION BIO INC | $25.0M | 0.61% | 13,896,543 | Common | SOLE |
| 014442107 | ALEC | ALECTOR INC | $24.4M | 0.60% | 4,056,548 | Common | SOLE |
| 22663K107 | CRNX | CRINETICS PHARMACEUTICALS IN | $24.0M | 0.59% | 1,330,263 | Common | SOLE |
| 019770106 | ALLO | ALLOGENE THERAPEUTICS INC | $22.3M | 0.55% | 4,488,200 | Common | SOLE |
| 38870X104 | GRPH | GRAPHITE BIO INC | $22.2M | 0.54% | 8,538,446 | Common | SOLE |
| 690469101 | OVID | OVID THERAPEUTICS INC | $20.1M | 0.49% | 6,117,400 | Common | SOLE |
| 62921N105 | NGMUSD | NGM BIOPHARMACEUTICALS INC | $16.7M | 0.41% | 6,435,518 | Common | SOLE |
| 87583X109 | TNGX | TANGO THERAPEUTICS INC | $13.4M | 0.33% | 4,047,114 | Common | SOLE |
| 89854M101 | TCRX | TSCAN THERAPEUTICS INC | $12.5M | 0.31% | 5,000,000 | Common | SOLE |
| 37148K100 | GBIOGBX | GENERATION BIO CO | $11.3M | 0.28% | 2,046,867 | Common | SOLE |
| 88427A107 | — | THIRD HARMONIC BIO INC | $10.0M | 0.25% | 2,088,780 | Common | SOLE |
| 71722W107 | PHAT | PHATHOM PHARMACEUTICALS INC | $10.0M | 0.25% | 700,000 | Common | SOLE |
| 26818M108 | DYN | DYNE THERAPEUTICS INC | $9.0M | 0.22% | 798,701 | Common | SOLE |
| 74168J101 | PRME | PRIME MEDICINE INC | $8.8M | 0.22% | 600,000 | Common | SOLE |
| 98943L107 | ZNTL | ZENTALIS PHARMACEUTICALS INC | $8.5M | 0.21% | 300,000 | Common | SOLE |
| 47103J105 | JANX | JANUX THERAPEUTICS INC | $5.4M | 0.13% | 452,590 | Common | SOLE |
| 50127T109 | KURA | KURA ONCOLOGY INC | $5.3M | 0.13% | 500,000 | CALL | SOLE |
| 74065P101 | PRLD | PRELUDE THERAPEUTICS INC | $5.2M | 0.13% | 1,157,452 | Common | SOLE |
| N71542109 | PRQR | PROQR THRAPEUTICS N V | $4.8M | 0.12% | 2,980,016 | Common | SOLE |
| 43906K100 | HOOKGBP | HOOKIPA PHARMA INC | $4.0M | 0.10% | 4,595,024 | Common | SOLE |
| 01626L105 | — | ALIGOS THERAPEUTICS INC | $3.8M | 0.09% | 3,948,360 | Common | SOLE |
| 01671P100 | ALLKGUSD | ALLAKOS INC | $3.3M | 0.08% | 748,900 | Common | SOLE |
| 00773J103 | — | AEGLEA BIOTHERAPEUTICS INC | $2.3M | 0.06% | 5,000,000 | Common | SOLE |
| 67080N119 | NUVB/WS | NUVATION BIO INC | $1.7M | 0.04% | 963,333 | Common | SOLE |
| 87978U108 | OVASUSD | TEMPEST THERAPEUTICS INC | $1.4M | 0.03% | 1,123,434 | Common | SOLE |
| 35104E100 | FDMT | 4D MOLECULAR THERAPEUTICS IN | $1.2M | 0.03% | 66,978 | Common | SOLE |
| 73730P108 | PSTXUSD | POSEIDA THERAPEUTICS INC | $1.2M | 0.03% | 676,296 | Common | SOLE |
| N62509117 | NAMSW | NEWAMSTERDAM PHARMA COMPANY | $792,647 | 0.02% | 66,665 | Common | SOLE |
| 50107A104 | KRON1USD | KRONOS BIO INC | $562,062 | 0.01% | 326,780 | Common | SOLE |
| 14171W111 | — | CAREMAX INC | $311,000 | 0.01% | 100,000 | Common | SOLE |
| 86889P117 | SRZNW | SURROZEN INC | $36,666 | 0.00% | 66,665 | Common | SOLE |
Source: SEC EDGAR · raw 13F holdings as filed. The Class column shows the option type when reported (Put/Call) or Common when the issuer's equity is held directly. 13F discloses long positions only.