Third Rock Ventures V, L.P.
SEC insider (Form 3/4/5 filer). CIK 0001778071. 10% Owner at Septerna, Inc. (SEPN) and 1 other issuer. 11 reported Form 4/5 transactions since Sep 2024; latest on Aug 12, 2026. Located in BOSTON, MA.
Companies Third Rock Ventures V, L.P. has filed insider reports for
- Septerna, Inc. (SEPN): 10% Owner
- Rapport Therapeutics, Inc. (RAPP): 10% Owner
Third Rock Ventures V, L.P.
CIK: 0001778071
Transaction Breakdown
High conviction signal
Position reduction
Derivative conversions
Compensation grants
Gifts, tax withholding, conversions, dispositions to the issuer and other codes
Discretionary Trading P&L
Holdings
Transaction History (11 total)
- Aug 12, 2026SEPN
Septerna, Inc.
SaleDirect141 shares at avg. $51.08$7K - Aug 12, 2026SEPN
Septerna, Inc.
SaleDirect147.1K shares at avg. $50.27$7.4M - May 26, 2026RAPP
Rapport Therapeutics, Inc.
SaleDirect18.6K shares at avg. $40.05$744K - May 11, 2026RAPP
Rapport Therapeutics, Inc.
SaleDirect133.6K shares at avg. $40.24$5.4M - May 8, 2026RAPP
Rapport Therapeutics, Inc.
SaleDirect5K shares at avg. $40.31$202K - May 7, 2026RAPP
Rapport Therapeutics, Inc.
SaleDirect271.5K shares at avg. $40.12$10.9M - Apr 17, 2026RAPP
Rapport Therapeutics, Inc.
SaleDirect426K shares at avg. $40.32$17.2M - Oct 28, 2024SEPN
Septerna, Inc.
ConversionDirect4.8M shares- - Oct 28, 2024SEPN
Septerna, Inc.
ConversionIndirect2.9M shares- - Oct 28, 2024SEPN
Septerna, Inc.
PurchaseDirect370.5K shares at avg. $18.00$6.7M
| Type | Shares | Price | Ownership | |||
|---|---|---|---|---|---|---|
| Aug 12, 2026 |  SEPN Septerna, Inc. | Sale | 141 | $51.08 | $7,202 | Direct |
| Aug 12, 2026 | SEPN Septerna, Inc. | Sale | 147,059 | $50.27 | $7,392,656 | Direct |
| May 26, 2026 |  RAPP Rapport Therapeutics, Inc. | Sale | 18,572 | $40.05 | $743,753 | Direct |
| May 11, 2026 | RAPP Rapport Therapeutics, Inc. | Sale | 133,618 | $40.24 | $5,377,323 | Direct |
| May 8, 2026 | RAPP Rapport Therapeutics, Inc. | Sale | 5,018 | $40.31 | $202,256 | Direct |
| May 7, 2026 | RAPP Rapport Therapeutics, Inc. | Sale | 271,495 | $40.12 | $10,892,651 | Direct |
| Apr 17, 2026 | RAPP Rapport Therapeutics, Inc. | Sale | 426,005 | $40.32 | $17,175,244 | Direct |
| Oct 28, 2024 | SEPN Septerna, Inc. | Conversion | 4,790,773 | - | $0 | Direct |
| Oct 28, 2024 | SEPN Septerna, Inc. | Conversion | 2,872,956 | - | $0 | Indirect |
| Oct 28, 2024 | SEPN Septerna, Inc. | Purchase | 370,500 | $18.00 | $6,669,000 | Direct |
1-10 of 11 transactions