DYN Dyne Therapeutics, Inc.

NEUTRAL Impact: 2/10 144
Horizon immediate Filed May 6, 2026 Processed 1mo ago SEC 0001628280-26-031382
Form 144 — notice of proposed sale of securities
Latest settled — T+20d ⚠ clustered
DYN ▲ +2.57% at T+20d
NEUTRAL call ✓ call won +2.57% · α vs SPY -0.57% · entry $17.54 → $17.99
Next anchor: T+60d in 7w
Last close $16.81 (close Jun 8) · -4.16% from $17.54 entry
Entry anchored
May 6, 2026
via day open
T+1d
+0.40%
call +0.40% · α -0.43%
$17.61
settled 5w ago
T+5d
+5.13%
call +5.13% · α +3.63%
$18.44
settled 28d ago
T+20d
+2.57%
call +2.57% · α -0.57%
$17.99
settled 6d ago
T+60d
call — · α —
in 7w

Price Chart

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Executive Summary

Atlas Venture Associates XI, L.P., a major venture capital shareholder, filed a Form 144 indicating intent to sell 428 shares of Dyne Therapeutics common stock. The proposed sale is small (approx. $3.2M) relative to Dyne's $2.9B market cap and appears to be routine portfolio management, not indicative of bearish sentiment.

Actionable Insight

The filing is routine and immaterial given the small size of the proposed sale. Watch for any acceleration of insider selling or larger filings, but no immediate action is warranted.

Key Facts

  • Atlas Venture Associates XI, L.P. intends to sell 428 shares of Dyne Therapeutics common stock.
  • The filing notes no other sales of the issuer's securities in the past 3 months.
  • The shares were acquired via private placement on 04/26/2019.
  • Proposed sale price approximately $7,477 per share, with total value around $3.2 million.
  • Dyne's market cap is $2.9 billion, making this a negligible fraction of outstanding shares.

Financial Impact

Approximately $3.2 million (428 shares × ~$7,477/share)

insider selling volume

Risk Factors

  • Minimal direct impact on stock price; the sale is too small to signal distress.

Market Snapshot

Exchange
Nasdaq
Sector
Pharmaceutical Preparations
Analyst Consensus
85% bullish (20 analysts)

Documents Analyzed

This report is based on 3 SEC documents filed with EDGAR.

DocumentAccession Number
144 Filing (Primary)0001628280-26-031382
Document: 0001628280-26-031382-index.html0001628280-26-031382
Document: 0001628280-26-031382.txt0001628280-26-031382
27 reports for DYN
Performance horizon
89% Hit rate 8 of 9 directional calls best @ T+20▲ +13.90%Apr 20, 2026
Filters
Rows
Reports for DYN — sortable, filterable
Type Now
Jun 3, 2026
6d ago
8-K
BULLISH ★ 6/10
$17.99 $18.41▲ +2.33%▲ +1.94%$16.81 (−6.56%)
Jun 3, 2026
6d ago
Press Release
NEUTRAL ★ 5/10
$17.99 $18.41▲ +2.33%▲ +1.94%$16.81 (−6.56%)
May 20, 2026
20d ago
Press Release
NEUTRAL ★ 2/10
$17.37 $17.37· 0.00%▼ −0.45%$16.81 (−3.22%)
May 20, 2026
20d ago
Press Release
BULLISH ★ 7/10
$17.56 $17.37▼ −1.08%▼ −1.28%$16.81 (−4.27%)
May 13, 2026
27d ago
144
NEUTRAL ★ 2/10
$18.28 $17.29▼ −5.42%▼ −4.19%$16.81 (−8.04%)
May 13, 2026
27d ago
144
NEUTRAL ★ 2/10
$18.28 $17.29▼ −5.42%▼ −4.19%$16.81 (−8.04%)
May 11, 2026
29d ago
8-K
NEUTRAL ★ 5/10
$18.46 $18.37▼ −0.49%▼ −0.35%$16.81 (−8.94%)
May 6, 2026
4w ago
144
NEUTRAL ★ 2/10
$17.54 $17.61▲ +0.40%▼ −0.43%$16.81 (−4.16%)
May 6, 2026
4w ago
144
NEUTRAL ★ 2/10
$17.54 $17.61▲ +0.40%▼ −0.43%$16.81 (−4.16%)
May 4, 2026
5w ago
144
NEUTRAL ★ 2/10
$17.47 $18.84▲ +7.84%▲ +6.46%$16.81 (−3.78%)
Showing 10 of 27

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