144 ·Filed May 8, 2026
Form 144 — notice of proposed sale of securities
Actionable Insight • Neutral
Monitor for further Form 144 filings from Third Rock Ventures; continued selling at this pace could signal reduced long-term conviction, but the current amount is negligible.
Final — all horizons settled through T+60d
RAPP ▲ +10.43% at T+60d
NEUTRAL call ✓ call won +10.43% · α vs SPY +6.04% · entry $38.43 → $42.44
T+1d
-3.10%
call -3.10% · α -2.96%
$37.24
settled 6mo ago
T+5d
-8.46%
call -8.46% · α -8.37%
$35.18
settled 5mo ago
T+20d
-6.74%
call -6.74% · α -6.44%
$35.84
settled 5mo ago
T+60d
+10.43%
call +10.43% · α +6.04%
$42.44
settled 3mo ago
Price Chart
Loading chart...
Executive Summary
Third Rock Ventures V, L.P., a 10% stockholder, filed Form 144 to sell 5,018 shares of Rapport Therapeutics (RAPP) worth approximately $202,000. This is a minor sell-down following substantial recent sales by the same VC; the proposed amount represents less than 0.01% of market cap.
Key Facts
- Third Rock Ventures V, L.P. filed Form 144 on 2026-05-08 for 5,018 shares of common stock.
- Estimated aggregate value of proposed sale: $202,254.50.
- Selling entity is a 10% stockholder (venture capital firm), not an executive.
- Third Rock Ventures sold 426,005 shares on 04/17/2026 and 271,495 shares on 05/07/2026 in the prior three months.
- RAPP market cap: ~$1.9B with ~47.8M shares outstanding; proposed sale is ~0.01% of market cap.
Financial Impact
~$202,000 (0.01% of market cap)
dilution
Risk Factors
- Potential continued insider selling pressure if VC reduces position further.
Market Snapshot
Exchange
Nasdaq
Sector
Pharmaceutical Preparations
Analyst Consensus
94% bullish (17 analysts)
Investment Themes
Biotech & Drug Discovery
Documents Analyzed
This report is based on 3 SEC documents filed with EDGAR.
| Document | Accession Number |
|---|---|
| 144 Filing (Primary) | 0001974078-26-000173 |
| Document: 0001974078-26-000173-index.html | 0001974078-26-000173 |
| Document: 0001974078-26-000173.txt | 0001974078-26-000173 |
22 reports for RAPP
67% Hit rate @ T+5 Went positive at some point 6 of 8 best @ T+60▲ +24.87%
Filters
Rows
| 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%) |
Showing 10 of 22
US Market Status
Market Closed — Opens in 2h 42m
Subscribe to SecBot
Get Real-Time SEC Filing Intelligence
Comprehensive SEC filing analysis delivered the moment filings hit EDGAR. Sentiment scoring, impact analysis, and actionable insights for every material event.
Create a free account Live analysis, Telegram alerts, watchlists and the MCP server for subscribers