Third Rock Ventures continues to distribute shares, likely for fund-level liquidity. The stock may face modest selling pressure near the proposed sale price. Watch for additional Form 144 or Form 4 filings to gauge the pace of distribution.
Price Chart
Executive Summary
Third Rock Ventures V, L.P., a 10% stockholder, filed a Form 144 indicating intent to sell 271,495 shares of Rapport Therapeutics common stock, valued at approximately $10.9 million. This follows a prior sizable sale of 426,005 shares (~$17.2M) on April 17, 2026, signaling ongoing distribution by a major venture capital backer.
Key Facts
- Third Rock Ventures V, L.P. proposes to sell 271,495 shares.
- Estimated aggregate market value of proposed sale: $10,892,705.19.
- Shares acquired on 02/21/2023 via original issuance from the issuer.
- Prior sale of 426,005 shares (~$17.2M) on 04/17/2026 by the same entity.
- Recent insider activity (30d): 6 sells totaling $18.7M (prior to this filing).
Financial Impact
Proposed sale of ~$10.9M (0.6% of $1.8B market cap) adds to recent insider selling of $18.7M over the past 30 days.
Risk Factors
- Continued insider selling could pressure share price.
- VC distributions often persist over multiple weeks/months.
Market Snapshot
Investment Themes
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001974078-26-000168 |
| Document: 0001974078-26-000168-index.html | 0001974078-26-000168 |
| Document: 0001974078-26-000168.txt | 0001974078-26-000168 |
Filters
| Type | Now | ||||
|---|---|---|---|---|---|
Oct 23, 2026 2d ago | Insider Cluster | $26.00 | awaiting T+5 | — | $25.93 (−0.27%) |
Oct 22, 2026 4d ago | Insider Cluster | $27.33 | awaiting T+5 | — | $25.93 (−5.12%) |
Oct 21, 2026 4d ago | Insider Buy | $26.53 | awaiting T+5 | — | $25.93 (−2.26%) |
Oct 20, 2026 6d ago | 8-K | $29.37 | awaiting T+5 | — | $25.93 (−11.71%) |
Oct 6, 2026 19d ago | 144 | $30.86 $28.33 | ▲ +8.20% | ▲ +7.22% | $25.93 (+15.98%) |
Oct 1, 2026 24d ago | Insider Cluster | $32.17 $30.65 | ▼ −4.72% | ▼ −5.89% | $25.93 (−19.40%) |
Aug 26, 2026 8w ago | Insider Cluster | $50.83 $47.65 | ▼ −6.26% | ▼ −6.52% | $25.93 (−48.99%) |
Aug 5, 2026 11w ago | 8-K | $42.44 $47.73 | ▲ +12.46% | ▲ +12.11% | $25.93 (−38.90%) |
Jul 1, 2026 16w ago | Insider Cluster | $38.97 $41.75 | ▲ +7.13% | ▲ +5.77% | $25.93 (−33.46%) |
Jun 30, 2026 16w ago | 144 | $39.39 $39.72 | ▲ +0.84% | ▲ +0.58% | $25.93 (−34.17%) |
US Market Status
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