Prosight Management, LP — 13F Holdings & Portfolio
CIK 1617201 · latest 13F-HR filed 2026-05-15
Prosight Management, LP manages $609.8M in 13F-reported U.S. long-equity assets across 46 reported positions as of its 2026-03-31 13F-HR filing. Its largest disclosed positions are NKTR (8.67%), BSX (8.19%), JANX (8.09%). Quarter over quarter (versus its 2025-12-31 filing) the fund opened 16 new positions, exited 8, added to 15, and trimmed 10.
AUM is the long-equity portion reported on Form 13F-HR. Excludes short positions, cash, foreign holdings, and non-13F assets. For informational purposes only — not investment advice.
$609.8M
Long-equity book
46
Distinct positions
2026-03-31
Filed 2026-05-15
+16 / −8 / ↑15 / ↓10
vs 2025-12-31
| Name | Title / Status | Ownership | Type |
|---|
Top Adds (vs prior quarter)
- BOSTON SCIENTIFIC CORP$29.9M +149.3%
- NEKTAR THERAPEUTICS$29.4M +125.5%
- GENEDX HOLDINGS CORP$26.5M +369.9%
- SHATTUCK LABS INC$23.5M +270.2%
- ALNYLAM PHARMACEUTICALS INC$18.3M +269.6%
Top Trims
- ROIVANT SCIENCES LTD-$8.6M -63.4%
- PHREESIA INC-$7.3M -44.2%
- CONCENTRA GROUP HOLDINGS PAR-$6.7M -38.1%
- VEEVA SYS INC-$4.9M -24.5%
- MEIRAGTX HLDGS PLC-$2.7M -10.7%
New Positions
- ALKERMES PLC$18.2M
- SCHRODINGER INC$5.8M
- EMERGENT BIOSOLUTIONS INC$5.3M
- ICU MED INC$3.5M
- UPSTREAM BIO INC$2.2M
Exited Positions
- ICON PLC$20.0M
- AMICUS THERAPEUTICS INC$16.4M
- SELECT MED HLDGS CORP$15.4M
- AVANTOR INC$10.3M
- LABCORP HOLDINGS INC$8.7M
Rows tagged Call or Put are options positions, not stock. Per SEC Form 13F-HR, Value shows the notional value of the underlying (shares covered × underlying price), not the option premium. Shares is the number of underlying shares covered (divide by 100 for contract count).
| # | Issuer | Symbol | CUSIP | Value | Weight | Shares | Type |
|---|---|---|---|---|---|---|---|
| 1 | NEKTAR THERAPEUTICS | NKTR | 640268306 | $52.9M | 8.67% | 735,000 | SH |
| 2 | BOSTON SCIENTIFIC CORP | BSX | 101137107 | $49.9M | 8.19% | 795,547 | SH |
| 3 | JANUX THERAPEUTICS INC | JANX | 47103J105 | $49.3M | 8.09% | 3,550,000 | SH |
| 4 | PROCEPT BIOROBOTICS CORP | PRCT | 74276L105 | $48.6M | 7.98% | 1,945,000 | SH |
| 5 | GALAPAGOS NV | GLPG | 36315X101 | $46.5M | 7.63% | 1,550,000 | SH |
| 6 | GENEDX HOLDINGS CORP | WGS | 81663L200 | $33.6M | 5.51% | 523,463 | SH |
| 7 | SHATTUCK LABS INC | STTK | 82024L103 | $32.2M | 5.28% | 5,004,439 | SH |
| 8 | ADC THERAPEUTICS SA | ADCT | H0036K147 | $31.1M | 5.10% | 8,300,000 | SH |
| 9 | KURA ONCOLOGY INC | KURA | 50127T109 | $27.3M | 4.48% | 3,356,700 | SH |
| 10 | ALNYLAM PHARMACEUTICALS INC | ALNY | 02043Q107 | $25.1M | 4.12% | 76,000 | SH |
| 11 | MEIRAGTX HLDGS PLC | MGTX | G59665102 | $22.8M | 3.73% | 2,629,971 | SH |
| 12 | ALKERMES PLC | ALKS | G01767105 | $18.2M | 2.98% | 513,632 | SH |
| 13 | SYNDAX PHARMACEUTICALS INC | SNDX | 87164F105 | $18.0M | 2.95% | 770,000 | SH |
| 14 | VEEVA SYS INC | VEEV | 922475108 | $15.2M | 2.49% | 86,480 | SH |
| 15 | ZYMEWORKS INC | ZYME | 98985Y108 | $13.5M | 2.21% | 539,049 | SH |
| 16 | CRINETICS PHARMACEUTICALS IN | CRNX | 22663K107 | $12.7M | 2.08% | 350,000 | SH |
| 17 | ABIVAX SA | ABVX | 00370M103 | $11.7M | 1.92% | 105,000 | SH |
| 18 | CONCENTRA GROUP HOLDINGS PAR | CON | 20603L102 | $10.8M | 1.78% | 505,822 | SH |
| 19 | TERNS PHARMACEUTICALS INC | TERN | 880881107 | $10.7M | 1.75% | 202,300 | SH |
| 20 | PHREESIA INC | PHR | 71944F106 | $9.2M | 1.51% | 1,100,000 | SH |
| 21 | ONKURE THERAPEUTICS INC | OKUR | 68277Q105 | $8.9M | 1.46% | 2,154,381 | SH |
| 22 | CORBUS PHARMACEUTICALS HLDGS | CRBP | 21833P301 | $6.5M | 1.07% | 697,108 | SH |
| 23 | SCHRODINGER INC | SDGR | 80810D103 | $5.8M | 0.95% | 510,578 | SH |
| 24 | EMERGENT BIOSOLUTIONS INC | EBS | 29089Q105 | $5.3M | 0.87% | 639,118 | SH |
| 25 | ROIVANT SCIENCES LTD | ROIV | G76279101 | $5.0M | 0.82% | 180,000 | SH |
| 26 | ORTHOPEDIATRICS CORP | KIDS | 68752L100 | $4.8M | 0.79% | 302,399 | SH |
| 27 | IMMUNOVANT INC | IMVT | 45258J102 | $4.4M | 0.72% | 175,825 | SH |
| 28 | ICU MED INC | ICUI | 44930G107 | $3.5M | 0.58% | 27,450 | SH |
| 29 | TECTONIC THERAPEUTIC INC | TECX | 878972108 | $2.5M | 0.40% | 79,872 | SH |
| 30 | ROCKET PHARMACEUTICALS INC | RCKT | 77313F106 | $2.4M | 0.40% | 683,856 | SH |
| 31 | UPSTREAM BIO INC | UPB | 91678A107 | $2.2M | 0.36% | 241,123 | SH |
| 32 | PLIANT THERAPEUTICS INC | PLRX | 729139105 | $2.1M | 0.34% | 1,667,600 | SH |
| 33 | OMEROS CORP | OMER | 682143102 | $1.8M | 0.30% | 174,800 | SH |
| 34 | INTUITIVE SURGICAL INC | ISRG | 46120E602 | $1.8M | 0.30% | 4,000 | SH |
| 35 | AN2 THERAPEUTICS INC | ANTX | 037326105 | $1.8M | 0.29% | 515,754 | SH |
| 36 | ADICET BIO INC | ACET | 007002207 | $1.7M | 0.28% | 250,244 | SH |
| 37 | REGENXBIO INC | RGNX | 75901B107 | $1.7M | 0.27% | 200,000 | SH |
| 38 | COYA THERAPEUTICS INC | COYA | 22407B108 | $1.7M | 0.27% | 420,360 | SH |
| 39 | VIKING THERAPEUTICS INC | VKTX | 92686J106 | $1.5M | 0.24% | 45,000 | SH |
| 40 | IRHYTHM HOLDINGS INC | IRTC | 450056106 | $1.2M | 0.19% | 10,000 | SH |
| 41 | TRUEBLUE INC | TBI | 89785X101 | $974.0K | 0.16% | 249,107 | SH |
| 42 | IMMUNEERING CORP | IMRX | 45254E107 | $650.4K | 0.11% | 123,409 | SH |
| 43 | PALVELLA THERAPEUTICS INC NE | PVLA | 697947109 | $623.2K | 0.10% | 5,000 | SH |
| 44 | NOVOCURE LTD | NVCR | G6674U108 | $549.4K | 0.09% | 50,400 | SH |
| 45 | REIN THERAPEUTICS INC | RNTX | 00887A204 | $535.1K | 0.09% | 411,600 | SH |
| 46 | TRANSMEDICS GROUP INC | TMDX | 89377M109 | $497.1K | 0.08% | 5,000 | SH |
| Period | Filed | AUM | Holdings | Accession |
|---|---|---|---|---|
| 2026-03-31 | 2026-05-15 | $609.8M | 46 | 0001420506-26-001036 |
| 2025-12-31 | 2026-02-13 | $483.9M | 38 | 0001420506-26-000422 |
| 2025-09-30 | 2025-11-14 | $428.8M | 44 | 0001420506-25-003233 |