144 ·Filed May 6, 2026
Form 144 — notice of proposed sale of securities
Actionable Insight • Neutral
This is a routine small sale by a major shareholder; not indicative of fundamental change. Monitor for larger insider sales or any material corporate events.
Final — all horizons settled through T+60d ⚠ clustered
DYN ▲ +43.90% at T+60d
NEUTRAL call ✓ call won +43.90% · α vs SPY +40.07% · entry $17.54 → $25.24
T+1d
+0.40%
call +0.40% · α -0.43%
$17.61
settled 5mo ago
T+5d
+5.13%
call +5.13% · α +3.63%
$18.44
settled 5mo ago
T+20d
+2.57%
call +2.57% · α -0.57%
$17.99
settled 4mo ago
T+60d
+43.90%
call +43.90% · α +40.07%
$25.24
settled 2mo ago
Price Chart
Loading chart...
Executive Summary
Atlas Venture Fund XI, L.P. filed a Form 144 indicating intent to sell 43,621 shares of Dyne Therapeutics (DYN) valued at approximately $762,058. This represents a very small portion of the fund's likely holdings and is not material relative to DYN's $2.9B market cap.
Key Facts
- Atlas Venture Fund XI, L.P. filed Form 144 to sell 43,621 shares of DYN
- Estimated market value of the sale is $762,058.87
- Filing date: May 6, 2026
- Seller is a venture capital fund and major early investor in DYN
Financial Impact
Sale of 43,621 shares valued at ~$762k, representing ~0.03% of DYN's market cap
dilution
Risk Factors
- Recent pattern of insider selling (9 sells totaling $8.6M over 30 days) may indicate broader distribution
Market Snapshot
Exchange
Nasdaq
Sector
Pharmaceutical Preparations
Analyst Consensus
85% bullish (20 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) | 0001628280-26-031384 |
| Document: 0001628280-26-031384-index.html | 0001628280-26-031384 |
| Document: 0001628280-26-031384.txt | 0001628280-26-031384 |
44 reports for DYN
87% Hit rate best @ T+60▲ +46.36%
Filters
Rows
| Type | Now | ||||
|---|---|---|---|---|---|
Aug 17, 2026 6w ago | Insider Cluster | $26.15 $17.90 | ▲ +31.55% | ▲ +29.57% | $15.20 (+41.87%) |
Aug 14, 2026 7w ago | 144 | $26.15 $18.52 | ▼ −29.18% | ▼ −27.65% | $15.20 (−41.87%) |
Aug 13, 2026 7w ago | 144 | $25.70 $18.52 | ▲ +27.94% | ▲ +25.95% | $15.20 (+40.86%) |
Aug 13, 2026 7w ago | 144 | $25.70 $18.52 | ▼ −27.94% | ▼ −25.95% | $15.20 (−40.86%) |
Aug 13, 2026 7w ago | 144 | $25.70 $18.52 | ▼ −27.94% | ▼ −25.95% | $15.20 (−40.86%) |
Jul 29, 2026 9w ago | Press Release | $25.73 $26.09 | ▲ +1.40% | ▼ −2.57% | $15.20 (−40.92%) |
Jul 22, 2026 10w ago | Press Release | $23.21 $26.78 | ▼ −15.38% | ▼ −12.48% | $15.20 (+34.51%) |
Jul 20, 2026 10w ago | 8-K | $23.45 $26.15 | ▲ +11.51% | ▲ +7.39% | $15.20 (−35.18%) |
Jun 30, 2026 13w ago | Insider Cluster | $21.79 $25.10 | ▲ +15.19% | ▲ +17.38% | $15.20 (−30.24%) |
Jun 29, 2026 13w ago | 144 | $22.21 $25.63 | ▼ −15.40% | ▼ −16.43% | $15.20 (+31.56%) |
Showing 10 of 44
US Market Status
Market Closed — Opens Mon (38h 33m)
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.
Try SecBot Free Coming soon: SecBot Pro with alerts, watchlists, and API access