Third Rock Ventures V, L.P.
Ten-percent owner · SEPN, RAPP
As of 2026-09-16, Third Rock Ventures V, L.P. has 7 Form 4 transactions on record across 2 companies — 7 in the trailing 12 months.
Everything this person has disclosed to the SEC on Form 4 — across every company they file for — reconstructed from the public record. A filing history, not a tip sheet.
Reconstructed holdings
Reconstructed from this person's own Form 4 filings — the total each filing reported owning afterward, priced at the close on the as-of date shown. A filed position can lag the real one.
Direct and indirect holdings (e.g. through a trust or fund) are tagged separately, as filed.
Trades by company
Filing ledger
| Date | Company | Action | Shares @ price | Value | Ownership Δ | Owned after | Filing |
|---|---|---|---|---|---|---|---|
| 2026-08-12 | SEPN | Sale | 147,059 @ $50.27 | $7.4M | +2.5% of holding | 6,068,532 | Form 4 |
| 2026-08-12 | SEPN | Sale | 141 @ $51.08 | $7K | +0.0% of holding | 6,068,391 | Form 4 |
| 2026-05-26 | RAPP | Sale | 18,572 @ $40.05 | $744K | −0.3% of holding | 6,280,525 | Form 4 |
| 2026-05-11 | RAPP | Sale | 133,618 @ $40.24 | $5.4M | −2.1% of holding | 6,299,097 | Form 4 |
| 2026-05-08 | RAPP | Sale | 5,018 @ $40.31 | $202K | −0.1% of holding | 6,432,715 | Form 4 |
| 2026-05-07 | RAPP | Sale | 271,495 @ $40.12 | $10.9M | −4.0% of holding | 6,437,733 | Form 4 |
| 2026-04-17 | RAPP | Sale | 426,005 @ $40.32 | $17.2M | −6.0% of holding | 6,709,228 | Form 4 |
Source: SEC Form 4 filings. Each row links to its original filing.
Research tool, not investment advice — historical frequencies, not recommendations. A product of Marovel Technologies LLC. Full terms.