Q4 2023 · 13F-HR
EcoR1 Capital, LLCholdings as filed
Filed 2024-02-14 · accession 0000935836-24-000163
$3.85B
Reported value
51
Positions
2023-12-31
Period end
Holdings as filed
| CUSIP | Ticker | Issuer | Value | % port. | Shares | Class | Voting |
|---|---|---|---|---|---|---|---|
| 03753U106 | APLSUSD | APELLIS PHARMACEUTICALS INC | $668.8M | 17.4% | 11,173,068 | Common | SOLE |
| 60468T105 | MRTXEUR | MIRATI THERAPEUTICS INC | $434.6M | 11.3% | 7,396,979 | Common | SOLE |
| G72800108 | PRTA | PROTHENA CORP PLC | $421.0M | 10.9% | 11,584,280 | Common | SOLE |
| 04335A105 | ARVN | ARVINAS INC | $276.9M | 7.19% | 6,726,491 | Common | SOLE |
| 36315X101 | LKFT | GALAPAGOS NV | $234.0M | 6.08% | 5,756,268 | Common | SOLE |
| 004225108 | ACAD | ACADIA PHARMACEUTICALS INC | $187.6M | 4.87% | 5,991,479 | Common | SOLE |
| 032724106 | ANAB | ANAPTYSBIO INC | $161.1M | 4.18% | 7,521,024 | Common | SOLE |
| 98985Y108 | ZYME | ZYMEWORKS INC | $139.6M | 3.62% | 13,437,473 | Common | SOLE |
| 87583X109 | TNGX | TANGO THERAPEUTICS INC | $132.0M | 3.43% | 13,330,736 | Common | SOLE |
| G50871105 | JAZZ | JAZZ PHARMACEUTICALS PLC | $124.7M | 3.24% | 1,013,952 | Common | SOLE |
| 04016X101 | ARGX | ARGENX SE | $114.5M | 2.97% | 300,997 | Common | SOLE |
| 98401F105 | XNCR | XENCOR INC | $112.1M | 2.91% | 5,282,516 | Common | SOLE |
| 50127T109 | KURA | KURA ONCOLOGY INC | $83.5M | 2.17% | 5,806,871 | Common | SOLE |
| 803607100 | SRPT | SAREPTA THERAPEUTICS INC | $80.3M | 2.09% | 832,907 | Common | SOLE |
| 22663K107 | CRNX | CRINETICS PHARMACEUTICALS IN | $71.6M | 1.86% | 2,012,517 | Common | SOLE |
| 59045L106 | — | MERSANA THERAPEUTICS INC | $44.9M | 1.17% | 19,364,688 | Common | SOLE |
| 152309100 | CNTA | CENTESSA PHARMACEUTICALS PLC | $44.7M | 1.16% | 5,618,779 | Common | SOLE |
| 45257U108 | IMNM | IMMUNOME INC | $41.5M | 1.08% | 3,879,415 | Common | SOLE |
| 28036F105 | EWTX | EDGEWISE THERAPEUTICS INC | $38.2M | 0.99% | 3,493,194 | Common | SOLE |
| 640979100 | NMRA | NEUMORA THERAPEUTICS INC. | $35.3M | 0.92% | 2,071,450 | Common | SOLE |
| 88427A107 | — | THIRD HARMONIC BIO INC | $34.9M | 0.91% | 3,182,444 | Common | SOLE |
| 92915B106 | VYGR | VOYAGER THERAPEUTICS INC | $32.5M | 0.84% | 3,851,507 | Common | SOLE |
| 014442107 | ALEC | ALECTOR INC | $32.4M | 0.84% | 4,056,548 | Common | SOLE |
| 68622P109 | ORIC | ORIC PHARMACEUTICALS INC | $31.4M | 0.82% | 3,418,068 | Common | SOLE |
| 89854M101 | TCRX | TSCAN THERAPEUTICS INC | $29.1M | 0.76% | 5,000,000 | Common | SOLE |
| 67080N101 | NUVB | NUVATION BIO INC | $29.0M | 0.75% | 19,209,643 | Common | SOLE |
| N69605108 | PHVS | PHARVARIS N V | $25.2M | 0.66% | 900,000 | Common | SOLE |
| 64135M105 | NGNE | NEUROGENE INC | $24.6M | 0.64% | 1,271,342 | Common | SOLE |
| 38870X104 | GRPH | GRAPHITE BIO INC | $22.4M | 0.58% | 8,538,446 | Common | SOLE |
| 04683R106 | AVIR | ATEA PHARMACEUTICALS INC | $21.3M | 0.55% | 6,995,861 | Common | SOLE |
| 690469101 | OVID | OVID THERAPEUTICS INC | $19.7M | 0.51% | 6,117,400 | Common | SOLE |
| 00773J202 | SYRE | SPYRE THERAPEUTICS INC | $19.1M | 0.50% | 887,076 | Common | SOLE |
| 92539P101 | — | VERVE THERAPEUTICS INC | $17.4M | 0.45% | 1,250,000 | Common | SOLE |
| 46565G104 | 5E7 | ITEOS THERAPEUTICS INC | $12.2M | 0.32% | 1,115,022 | Common | SOLE |
| 38341P102 | GOSS | GOSSAMER BIO INC | $8.4M | 0.22% | 9,195,404 | Common | SOLE |
| 61775R105 | MORFUSD | MORPHIC HLDG INC | $6.1M | 0.16% | 211,262 | Common | SOLE |
| N71542109 | PRQR | PROQR THRAPEUTICS N V | $5.9M | 0.15% | 2,980,016 | Common | SOLE |
| 046513107 | ATRAGBX | ATARA BIOTHERAPEUTICS INC | $5.2M | 0.13% | 10,067,043 | Common | SOLE |
| 01626L105 | — | ALIGOS THERAPEUTICS INC | $4.2M | 0.11% | 6,389,468 | Common | SOLE |
| 76155X100 | RVMD | REVOLUTION MEDICINES INC | $3.8M | 0.10% | 132,579 | Common | SOLE |
| 43906K100 | HOOKGBP | HOOKIPA PHARMA INC | $3.7M | 0.10% | 4,595,024 | Common | SOLE |
| 37148K100 | GBIOGBX | GENERATION BIO CO | $3.4M | 0.09% | 2,046,867 | Common | SOLE |
| 62921N105 | NGMUSD | NGM BIOPHARMACEUTICALS INC | $2.0M | 0.05% | 2,385,873 | Common | SOLE |
| 01671P100 | ALLKGUSD | ALLAKOS INC | $2.0M | 0.05% | 748,900 | Common | SOLE |
| 90240B106 | TYRA | TYRA BIOSCIENCES INC | $1.9M | 0.05% | 137,014 | Common | SOLE |
| 71722W107 | PHAT | PHATHOM PHARMACEUTICALS INC | $1.8M | 0.05% | 198,480 | Common | SOLE |
| 69353Y103 | PMVP | PMV PHARMACEUTICALS INC | $1.8M | 0.05% | 566,879 | Common | SOLE |
| 67080N119 | NUVB/WS | NUVATION BIO INC | $1.5M | 0.04% | 963,333 | Common | SOLE |
| N62509117 | NAMSW | NEWAMSTERDAM PHARMA COMPANY | $744,648 | 0.02% | 66,665 | Common | SOLE |
| 86889P117 | SRZNW | SURROZEN INC | $626,651 | 0.02% | 66,665 | Common | SOLE |
| 14171W111 | — | CAREMAX INC | $49,820 | 0.00% | 100,000 | 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.