Third Rock Ventures V, L.P. 4
4 · Rapport Therapeutics, Inc. · Filed May 28, 2026
Research Summary
AI-generated summary of this filing
Rapport Therapeutics (RAPP) 10% Owner Third Rock Ventures V Sells Shares
What Happened
Third Rock Ventures V, L.P. (a greater-than-10% institutional owner of Rapport Therapeutics, ticker RAPP) sold 18,572 shares in a transaction on May 26, 2026. The shares were sold at a weighted-average price of $40.05 per share (prices ranged $40.00–$40.10), for aggregate proceeds of approximately $743,753. The sales were effected pursuant to a Rule 10b5-1 trading plan adopted November 21, 2025.
Key Details
- Transaction date: 2026-05-26; Form 4 filed: 2026-05-28 (filing appears timely).
- Transaction type/code: Sale (S); shares sold: 18,572; weighted-average price: $40.05; total proceeds ≈ $743,753.
- Price range: $40.00 to $40.10; the reporting person can provide a per-price breakdown on request (footnote).
- Ownership after transaction: Not specified in the provided excerpt of the filing.
- Footnotes: trades were under a 10b5-1 plan (F1); weighted-average/price range disclosure (F2); organizational/beneficial ownership disclaimers for Third Rock entities (F3, F4) — institutional structure noted and disclaimers that certain affiliated entities disclaim beneficial ownership except to extent of pecuniary interest.
Context
- This is institutional insider selling under a pre-set trading plan (10b5-1), which is typically routine and pre-planned rather than a real-time signal of sentiment.
- As a >10% owner, Third Rock is an institutional investor, not a company executive; such sales can reflect portfolio or fund-level management rather than management view on the company.
Insider Transaction Report
Form 4
Third Rock Ventures V, L.P.
10% Owner
Transactions
- Sale
Common Stock
[F1][F2][F3]2026-05-26$40.05/sh−18,572$743,753→ 6,280,525 total
Holdings
- 969,218(indirect: By Third Rock Ventures VI, L.P.)
Common Stock
[F4]
Footnotes (4)
- [F1]The reported transactions were effected pursuant to a Rule 10b5-1 trading plan dated November 21, 2025, previously adopted by the Reporting Person.
- [F2]The price reported is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.00 to $40.10, inclusive. The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote (2).
- [F3]These shares are directly held by Third Rock Ventures V, L.P. ("TRV V"). The general partner of TRV V is Third Rock Ventures GP V, L.P. ("TRV GP V"). The general partner of TRV GP V is TRV GP V, LLC ("TRV GP V LLC"). Each of TRV GP V and TRV GP V LLC disclaims beneficial ownership of the shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares.
- [F4]The shares are held directly by Third Rock Ventures VI, L.P. ("TRV VI"). The general partner of TRV VI is Third Rock Ventures GP VI, L.P. ("TRV GP VI"). The general partner of TRV GP VI is TRV GP VI, LLC ("TRV GP VI LLC"). Each of TRV GP VI, and TRV GP VI LLC, disclaims beneficial ownership of these shares except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that it is the beneficial owner of such shares. Each of Reporting Persons disclaims the existence of a Section 13(d) "group" as between any TRV V related parties and any TRV VI related parties and this report shall not be deemed an admission that any of such parties is or may be part of such a group with any of the other parties.