Transaction · 0001814189-26-000005

Kerr Douglas

Kerr Douglas, CMO, reported an open-market or private sale at Dyne Therapeutics, Inc. involving 3745.000000 shares for an estimated $91190.75. Reported holdings after the transaction were 163854.000000 shares. The stored filing text includes a detected 10b5-1 reference.

Open-market sellSEC transaction code SCMO
DYNDyne Therapeutics, Inc.
Filing timeSep 08
Trade dateSep 04, 2026
Filing · SECView on SEC
InsiderProfile

Price performance since filing

Close on the filing date, the pre-filing context, and the forward return at standard windows
Price at filing
$20.30
Pre-filing
1mo ago +28.9%1w ago +23.5%1d ago +22.9%
Returns since
7d +0.0%30d +0.0%90d +0.0%180d +0.0%1y +0.0%

DYN price since this filing

30 days of pre-filing context and vertical markers at the filing date plus 7d / 30d / 90d / 180d / 1y afterwards
DYN since 2026-09-08Filed yesterday · 1 day of post-filing data
Loading…
Filing datePost-filing windows (7d, 30d, 90d, 180d, 1y)30 days of pre-filing context

Transaction facts

Stored Form 4 columns with their raw values

Non-derivative
Type
Sell
Code S
Identifier
0001814189-26-000005
Common Stock
Transaction date
Sep 04, 2026
Filed Sep 08, 2026, 08:14 PM · 4d delay
Shares
3.74k sh
$2.43k per share
Estimated value
-$9.11M
Computed from shares × price
Holdings after
163k sh
Direct

Filing signal explanations

Badges describe filing facts only — not predictions.

Cluster 14dRepeat 30dPattern $10.0MLarge $100M
Direct Ownership Repeat Seller 10b5-1 Detected
-4score
Filing-only score

-4

Compact filing score computed from stored Form 4 facts. Version v1.

Neutral filing signal

This filing is broadly neutral on the filing-only scale. The Form 4 facts do not strongly tilt positive or negative.

Reported relationships & other filings

Form 4 relationship flags and nearby filing context

Reported roles

Chief Medical Officer

Officer YesDirector No10% NoOther No
Footnotes & amended
  1. F1

    Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on Septembe…

  2. F2

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $24.27 to $24.50, inclusive. The Reporting Person undertakes t…

  3. F3

    Represents shares automatically sold by the Reporting Person to satisfy tax withholding obligations in connection with the vesting of restricted stock units granted to the Reporting Person on December…

  4. F4

    The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices within the range of $18.77 to $18.92, inclusive. The Reporting Person undertakes t…

  5. F5

    Includes 125,126 unvested RSUs.

Original filing · 0001814189-26-000005
Related transactions

0 other filings

Same reporting owner
Recent company activity

0 recent txs

DYN