144 ·Filed May 4, 2026

DYN

Dyne Therapeutics, Inc.
NEUTRAL
Impact 2/10
Horizonimmediate Processed5mo ago SEC0001628280-26-029909
Form 144 — notice of proposed sale of securities
Actionable Insight • Neutral

This is a routine and immaterial sale by a venture backer. No trading action warranted. Continue to monitor any large-scale insider selling clusters or changes in fundamental performance.

DirectionNeutral
Confidencehigh
Horizonimmediate
Final — all horizons settled through T+60d ⚠ clustered
DYN ▲ +47.28% at T+60d
NEUTRAL call ✓ call won +47.28% · α vs SPY +44.54% · entry $17.47 → $25.73
Entry anchored
May 4, 2026
via day open
T+1d
+7.84%
call +7.84% · α +6.46%
$18.84
settled 5mo ago
T+5d
+5.15%
call +5.15% · α +3.17%
$18.37
settled 5mo ago
T+20d
-1.32%
call -1.32% · α -6.27%
$17.24
settled 4mo ago
T+60d
+47.28%
call +47.28% · α +44.54%
$25.73
settled 2mo ago

Price Chart

Loading chart...

Executive Summary

Atlas Venture Fund XI, L.P., a major shareholder, filed a Form 144 to sell 6,241 shares of Dyne Therapeutics common stock, valued at approximately $108,531. The sale is immaterial relative to the company's $2.9B market cap and represents a routine portfolio adjustment by a venture investor. No change in fundamentals or outlook is implied.

Key Facts

  • Atlas Venture Fund XI, L.P. intends to sell 6,241 shares.
  • Estimated aggregate value: $108,530.99.
  • Filing date: May 4, 2026.
  • Dyne Therapeutics market cap: $2.9B.
  • Over the past 30 days, there have been 9 insider sells totaling $8.6M.

Financial Impact

Sale of ~$108,531 represents ~0.004% of market cap.

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.

DocumentAccession Number
144 Filing (Primary)0001628280-26-029909
Document: 0001628280-26-029909-index.html0001628280-26-029909
Document: 0001628280-26-029909.txt0001628280-26-029909
44 reports for DYN
Performance horizon
87% Hit rate 13 of 15 directional calls best @ T+60▲ +46.36%May 20, 2026
Filters
Rows
Reports for DYN — sortable, filterable
TypeNow
Aug 17, 2026
6w ago
Insider Cluster
BEARISH ★ 6/10
$26.15 $17.90▲ +31.55%▲ +29.57%$15.39 (+41.15%)
Aug 14, 2026
6w ago
144
NEUTRAL ★ 4/10
$26.15 $18.52▼ −29.18%▼ −27.65%$15.39 (−41.15%)
Aug 13, 2026
7w ago
144
BEARISH ★ 6/10
$25.70 $18.52▲ +27.94%▲ +25.95%$15.39 (+40.12%)
Aug 13, 2026
7w ago
144
NEUTRAL ★ 2/10
$25.70 $18.52▼ −27.94%▼ −25.95%$15.39 (−40.12%)
Aug 13, 2026
7w ago
144
NEUTRAL ★ 2/10
$25.70 $18.52▼ −27.94%▼ −25.95%$15.39 (−40.12%)
Jul 29, 2026
9w ago
Press Release
BULLISH ★ 7/10
$25.73 $26.09▲ +1.40%▼ −2.57%$15.39 (−40.19%)
Jul 22, 2026
10w ago
Press Release
BEARISH ★ 6/10
$23.21 $26.78▼ −15.38%▼ −12.48%$15.39 (+33.69%)
Jul 20, 2026
10w ago
8-K
BULLISH ★ 7/10
$23.45 $26.15▲ +11.51%▲ +7.39%$15.39 (−34.37%)
Jun 30, 2026
13w ago
Insider Cluster
NEUTRAL ★ 5/10
$21.79 $25.10▲ +15.19%▲ +17.38%$15.39 (−29.37%)
Jun 29, 2026
13w ago
144
BEARISH ★ 4/10
$22.21 $25.63▼ −15.40%▼ −16.43%$15.39 (+30.71%)
Showing 10 of 44

US Market Status

Market Open — Closes in 2h 40m

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