RA Capital Nexus Fund, L.P. — SEC Form 4 filings
SEC reporting owner CIK 1780117. 59 Form 4 filings on record with FilingPulse; latest filed 2026-09-17.
Transaction summary — filings shown
Covers the 50 most recent of 59 filings on record, filed 2024-06-20 to 2026-09-17. Counts and totals are arithmetic on values as filed — descriptive data, not a recommendation.
- Open-market purchases (code P, non-derivative): 38 legs across 21 filings — 40,855,505 shares, $350,366,900 total (shares × price as filed).
- Open-market sales (code S, non-derivative): 65 legs across 5 filings — 1,121,352 shares, $38,604,819 total (shares × price as filed).
- Other reported legs (grants, option exercises, tax withholding, gifts, derivative-security transactions, …): 71.
- Largest priced transaction: purchase of 7,645,007 shares @ $12.00 ($91,740,084) in Artiva Biotherapeutics, Inc., filed 2024-07-24.
By issuer — same filings
Open-market purchase/sale legs on non-derivative securities, grouped by issuer. Role is as filed on the newest filing for that issuer. Dollar totals cover priced legs only (shares × price as filed). Ordered by priced transaction value, largest first.
| Issuer | Role (as filed) | Filings | Purchases (P) | Sales (S) | Other legs |
|---|---|---|---|---|---|
| Artiva Biotherapeutics, Inc. (ARTV) | Director | 14 | 22 legs · 16,975,876 sh · $192,678,449 | — | 14 |
| Climb Bio, Inc. (CLYM) | Director | 8 | 5 legs · 13,330,218 sh · $50,732,442 | — | 10 |
| 89bio, Inc. (ETNB) | Director, 10% owner | 4 | 1 leg · 5,714,285 sh · $49,999,994 | — | 12 |
| Sionna Therapeutics, Inc. (SION) | Director | 6 | 2 legs · 1,125,000 sh · $20,250,000 | 44 legs · 540,277 sh · $21,463,466 | 16 |
| Tyra Biosciences, Inc. (TYRA) | Director | 8 | 7 legs · 2,782,016 sh · $35,156,072 | — | 5 |
| Vor Biopharma Inc. (VOR) | Director | 6 | — | 21 legs · 581,075 sh · $17,141,353 | 5 |
| Aerovate Therapeutics, Inc. (AVTE) | Director | 1 | 1 leg · 928,110 sh · $1,549,944 | — | — |
| Freenome, Inc. (FRNM) | Director | 1 | — | — | 7 |
| Nkarta, Inc. (NKTX) | Director | 2 | — | — | 2 |
Form 4 filings — RA Capital Nexus Fund, L.P.
| Filed | Form | Issuer | Reported transactions | Source |
|---|---|---|---|---|
| 2026-09-17 | 4 | Tyra Biosciences, Inc. (TYRA) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 9,078,529 (derivative) @ $22.03 | EDGAR |
| 2026-09-14 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 16,250 (derivative) @ $0 | EDGAR |
| 2026-09-08 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 13,750 (derivative) @ $0 | EDGAR |
| 2026-07-31 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 20,824 @ $9.99 · Purchase (P): 24,944 @ $9.93 | EDGAR |
| 2026-07-28 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 41,319 @ $9.99 | EDGAR |
| 2026-07-23 | 4/A | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 6,522 @ $8.94 | EDGAR |
| 2026-07-23 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 120,582 @ $9.55 · Purchase (P): 84,124 @ $9.93 · Purchase (P): 59,880 @ $9.96 | EDGAR |
| 2026-07-22 | 4 | Freenome, Inc. (FRNM) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund II, L.P., RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 6,561,711 · Grant/award (A): 970,950 · Grant/award (A): 553,703 · Grant/award (A): 908,103 · Grant/award (A): 367,427 · Grant/award (A): 4,918,411 @ $10 · +1 more | EDGAR |
| 2026-07-20 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 152,472 @ $8.93 · Purchase (P): 7,882 @ $8.95 | EDGAR |
| 2026-07-14 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 15,102 @ $8.97 · Purchase (P): 6,552 @ $8.94 | EDGAR |
| 2026-07-01 | 4 | Climb Bio, Inc. (CLYM) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund II, L.P., RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 70,284 (derivative) @ $0 | EDGAR |
| 2026-06-29 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 31,000 @ $8.88 · Purchase (P): 1,876 @ $8.98 | EDGAR |
| 2026-06-18 | 4 | Sionna Therapeutics, Inc. (SION) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 17,340 (derivative) @ $0 | EDGAR |
| 2026-06-16 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 391,019 @ $8.57 · Purchase (P): 15,414 @ $8.99 · Purchase (P): 124,893 @ $8.89 | EDGAR |
| 2026-06-11 | 4 | Nkarta, Inc. (NKTX) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 37,000 (derivative) @ $0 | EDGAR |
| 2026-06-11 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 479,039 @ $6.91 · Purchase (P): 103 @ $7 · Purchase (P): 548,580 @ $7.91 | EDGAR |
| 2026-06-08 | 4 | Climb Bio, Inc. (CLYM) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund II, L.P., RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 40,000 (derivative) @ $0 | EDGAR |
| 2026-06-01 | 4 | Tyra Biosciences, Inc. (TYRA) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 13,160 (derivative) @ $0 | EDGAR |
| 2026-05-13 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 6,510,416 @ $11.52 · Purchase (P): 2,170,138 (derivative) @ $11.52 | EDGAR |
| 2026-04-29 | 4 | Climb Bio, Inc. (CLYM) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund II, L.P., RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 2,106,000 (derivative) @ $9.50 | EDGAR |
| 2026-01-07 | 4 | Climb Bio, Inc. (CLYM) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund II, L.P., RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 7,111 @ $3.50 | EDGAR |
| 2025-12-15 | 4 | Climb Bio, Inc. (CLYM) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund II, L.P., RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Disposition to issuer (D): 20,440,000 @ $0 · Purchase (P): 213,099 @ $2.18 · Purchase (P): 101,462 @ $2.86 · Grant/award (A): 20,440,000 (derivative) | EDGAR |
| 2025-11-24 | 4 | Sionna Therapeutics, Inc. (SION) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Sale (S): 150 @ $39.89 · Sale (S): 1,235 @ $39.89 · Sale (S): 801 @ $39.89 · Sale (S): 947 @ $39.89 · Sale (S): 96 @ $40.50 · Sale (S): 788 @ $40.50 · +6 more | EDGAR |
| 2025-11-19 | 4 | Sionna Therapeutics, Inc. (SION) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Sale (S): 2,182 @ $40.20 · Sale (S): 17,913 @ $40.20 · Sale (S): 11,626 @ $40.20 · Sale (S): 13,734 @ $40.20 · Sale (S): 1,701 @ $41.05 · Sale (S): 13,964 @ $41.05 · +18 more | EDGAR |
| 2025-11-03 | 4 | 89bio, Inc. (ETNB) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Disposition to issuer (D): 19,554,319 · Disposition to issuer (D): 335,364 · Disposition to issuer (D): 4,331,081 (derivative) @ $0 · Disposition to issuer (D): 7,000 (derivative) @ $0 · Disposition to issuer (D): 7,000 (derivative) @ $0 · Disposition to issuer (D): 12,500 (derivative) @ $0 · +4 more | EDGAR |
| 2025-10-28 | 4 | Sionna Therapeutics, Inc. (SION) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Sale (S): 14,116 @ $39.50 · Sale (S): 122,271 @ $39.50 · Sale (S): 66,672 @ $39.50 · Sale (S): 107,941 @ $39.50 · Sale (S): 3,624 @ $39.58 · Sale (S): 31,392 @ $39.58 · +2 more | EDGAR |
| 2025-10-22 | 4 | Vor Biopharma Inc. (VOR) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Sale (S): 70,366 @ $29.63 · Sale (S): 13,817 @ $29.63 · Sale (S): 6,553 @ $30.12 · Sale (S): 1,287 @ $30.12 · Sale (S): 25,027 @ $28.11 | EDGAR |
| 2025-10-17 | 4 | Vor Biopharma Inc. (VOR) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Sale (S): 42,699 @ $30.55 · Sale (S): 8,384 @ $30.55 · Sale (S): 234 @ $31.17 · Sale (S): 46 @ $31.17 · Sale (S): 111,041 @ $29.32 · Sale (S): 21,804 @ $29.32 · +10 more | EDGAR |
| 2025-09-22 | 4 | Vor Biopharma Inc. (VOR) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 10,000,000 (derivative) @ $5 | EDGAR |
| 2025-09-10 | 4 | Vor Biopharma Inc. (VOR) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 60,000 (derivative) @ $0 | EDGAR |
| 2025-06-26 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 13,750 (derivative) @ $0 | EDGAR |
| 2025-06-16 | 4 | Sionna Therapeutics, Inc. (SION) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 19,959 (derivative) @ $0 | EDGAR |
| 2025-06-16 | 4 | Tyra Biosciences, Inc. (TYRA) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 31,307 @ $10.20 · Purchase (P): 120,167 @ $10.20 · Purchase (P): 11,813 @ $10.13 | EDGAR |
| 2025-06-11 | 4 | Tyra Biosciences, Inc. (TYRA) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 186,850 @ $10.19 | EDGAR |
| 2025-06-09 | 4 | Nkarta, Inc. (NKTX) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 46,000 (derivative) @ $0 | EDGAR |
| 2025-06-06 | 4 | Tyra Biosciences, Inc. (TYRA) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 997,864 @ $9.63 · Purchase (P): 213,334 @ $10.04 | EDGAR |
| 2025-06-05 | 4 | Climb Bio, Inc. (CLYM) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund II, L.P., RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 40,000 (derivative) @ $0 | EDGAR |
| 2025-06-02 | 4 | Tyra Biosciences, Inc. (TYRA) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 22,200 (derivative) @ $0 | EDGAR |
| 2025-05-23 | 4 | Vor Biopharma Inc. (VOR) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 30,000 (derivative) @ $0 | EDGAR |
| 2025-02-10 | 4 | Sionna Therapeutics, Inc. (SION) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Conversion (C): 5,021,990 · Conversion (C): 527,444 · Conversion (C): 2,222,084 · Conversion (C): 179,975 · Purchase (P): 1,022,586 @ $18 · Purchase (P): 102,414 @ $18 · +10 more | EDGAR |
| 2025-02-05 | 4 | 89bio, Inc. (ETNB) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 56,400 (derivative) @ $0 | EDGAR |
| 2025-02-03 | 4 | 89bio, Inc. (ETNB) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 5,714,285 @ $8.75 | EDGAR |
| 2024-12-30 | 4 | Vor Biopharma Inc. (VOR) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 16,897,159 · Grant/award (A): 21,121,449 (derivative) | EDGAR |
| 2024-11-18 | 4 | 89bio, Inc. (ETNB) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 3,250,000 (derivative) @ $8.50 | EDGAR |
| 2024-11-13 | 4 | Tyra Biosciences, Inc. (TYRA) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 1,220,681 @ $16.25 | EDGAR |
| 2024-10-22 | 4 | Tyra Biosciences, Inc. (TYRA) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Other (J): 1,000,000 · Other (J): 2,358,457 (derivative) | EDGAR |
| 2024-07-24 | 4 | Artiva Biotherapeutics, Inc. (ARTV) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Conversion (C): 725,391 · Conversion (C): 264,571 · Conversion (C): 68,320 · Other (J): 323,181 @ $10.20 · Other (J): 138,506 @ $10.20 · Purchase (P): 7,645,007 @ $12 · +6 more | EDGAR |
| 2024-07-01 | 4 | Eliem Therapeutics, Inc. (ELYM) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund II, L.P., RA Capital Nexus Fund III, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 973,000 · Grant/award (A): 2,479,872 · Grant/award (A): 1,807,000 · Purchase (P): 11,949,171 @ $3.84 · Purchase (P): 1,059,375 @ $3.84 | EDGAR |
| 2024-06-28 | 4 | Eliem Therapeutics, Inc. (ELYM) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, RA Capital Nexus Fund II, L.P., Kolchinsky Peter, Shah Rajeev M. | Grant/award (A): 10,000 (derivative) @ $0 | EDGAR |
| 2024-06-20 | 4 | Aerovate Therapeutics, Inc. (AVTE) jointly with RA CAPITAL MANAGEMENT, L.P., RA Capital Healthcare Fund LP, Kolchinsky Peter, Shah Rajeev M. | Purchase (P): 928,110 @ $1.67 | EDGAR |
FilingPulse's Form 4 archive currently extends back to 2024-01-11 and is expanding backward through EDGAR history — earlier filings by this insider may not be indexed yet. Names and roles are shown as filed.
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