Douglas Kerr

CIK: 0001814189

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)11 (68.8%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)5 (31.3%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

Gifts, tax withholding, conversions, dispositions to the issuer and other codes

Companies & Roles (1)

DYN

Dyne Therapeutics, Inc.

Officer

Discretionary Trading P&L

Holdings

Transaction History (16 total)

DYN
Dyne Therapeutics, Inc.
Oct 20, 2026
Award(A)
Direct
8K shares-
DYN
Dyne Therapeutics, Inc.
Sep 8, 2026
Sale(S)
Direct
1.3K shares at avg. $18.88$24K
DYN
Dyne Therapeutics, Inc.
Sep 4, 2026
Sale(S)
Direct
3.7K shares at avg. $24.35$91K
DYN
Dyne Therapeutics, Inc.
Aug 13, 2026
Sale(S)
Direct
1.6K shares at avg. $26.28$41K
DYN
Dyne Therapeutics, Inc.
Jun 16, 2026
Sale(S)
Direct
887 shares at avg. $18.33$16K
DYN
Dyne Therapeutics, Inc.
May 13, 2026
Sale(S)
Direct
1.6K shares at avg. $18.36$29K
DYN
Dyne Therapeutics, Inc.
Mar 5, 2026
Sale(S)
Direct
904 shares at avg. $14.90$13K
DYN
Dyne Therapeutics, Inc.
Feb 12, 2026
Award(A)
Direct
85K shares-
DYN
Dyne Therapeutics, Inc.
Dec 5, 2025
Sale(S)
Direct
880 shares at avg. $20.72$18K
DYN
Dyne Therapeutics, Inc.
Sep 5, 2025
Sale(S)
Direct
873 shares at avg. $13.41$12K
DYN
Dyne Therapeutics, Inc.
Sep 4, 2025
Sale(S)
Direct
3.6K shares at avg. $13.27$47K
DYN
Dyne Therapeutics, Inc.
Jul 16, 2025
Award(A)
Stock option (right to buy)
Direct
65.1K shares-
DYN
Dyne Therapeutics, Inc.
Jun 5, 2025
Sale(S)
Direct
1.3K shares at avg. $13.35$18K
DYN
Dyne Therapeutics, Inc.
Mar 5, 2025
Sale(S)
Direct
1.3K shares at avg. $11.83$16K
DYN
Dyne Therapeutics, Inc.
Dec 4, 2024
Award(A)
Direct
48K shares-
DYN
Dyne Therapeutics, Inc.
Sep 3, 2024
Award(A)
Direct
47.5K shares-

		Type	Shares	Price		Ownership
Oct 20, 2026	DYN Dyne Therapeutics, Inc.	Award(A)	8,000	-	$0	Direct
Sep 8, 2026	DYN Dyne Therapeutics, Inc.	Sale(S)	1,290	$18.88	$24,355	Direct
Sep 4, 2026	DYN Dyne Therapeutics, Inc.	Sale(S)	3,745	$24.35	$91,191	Direct
Aug 13, 2026	DYN Dyne Therapeutics, Inc.	Sale(S)	1,556	$26.28	$40,892	Direct
Jun 16, 2026	DYN Dyne Therapeutics, Inc.	Sale(S)	887	$18.33	$16,259	Direct
May 13, 2026	DYN Dyne Therapeutics, Inc.	Sale(S)	1,564	$18.36	$28,715	Direct
Mar 5, 2026	DYN Dyne Therapeutics, Inc.	Sale(S)	904	$14.90	$13,470	Direct
Feb 12, 2026	DYN Dyne Therapeutics, Inc.	Award(A)	85,000	-	$0	Direct
Dec 5, 2025	DYN Dyne Therapeutics, Inc.	Sale(S)	880	$20.72	$18,234	Direct
Sep 5, 2025	DYN Dyne Therapeutics, Inc.	Sale(S)	873	$13.41	$11,707	Direct
Sep 4, 2025	DYN Dyne Therapeutics, Inc.	Sale(S)	3,552	$13.27	$47,135	Direct
Jul 16, 2025	DYN Dyne Therapeutics, Inc.	Award(A) Stock option (right to buy)	65,110	-	-	Direct
Jun 5, 2025	DYN Dyne Therapeutics, Inc.	Sale(S)	1,342	$13.35	$17,916	Direct
Mar 5, 2025	DYN Dyne Therapeutics, Inc.	Sale(S)	1,343	$11.83	$15,888	Direct
Dec 4, 2024	DYN Dyne Therapeutics, Inc.	Award(A)	48,000	-	$0	Direct
Sep 3, 2024	DYN Dyne Therapeutics, Inc.	Award(A)	47,500	-	$0	Direct

1-16 of 16 transactions

About Kerr Douglas

Kerr Douglas (SEC CIK 0001814189) files insider reports with the SEC as Head of R&D and CMO of Dyne Therapeutics, Inc. (DYN).

Signal8 holds 15 ownership filings by Kerr Douglas (1 Form 3, 14 Form 4), filed between Sep 3, 2024 and Oct 22, 2026. Those filings report 16 transactions, from Sep 3, 2024 to Oct 20, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Kerr Douglas's filings is in WALTHAM, MA.

Recent filings by Kerr Douglas

Oct 20, 2026: Grant or award of DYN shares (Form 4, code A).
Sep 8, 2026: Open-market sale of DYN shares (Form 4, code S).
Sep 4, 2026: Open-market sale of DYN shares (Form 4, code S).
Aug 13, 2026: Open-market sale of DYN shares (Form 4, code S).
Jun 16, 2026: Open-market sale of DYN shares (Form 4, code S).

Other insiders filing for Dyne Therapeutics, Inc. (DYN)

Posner Brian S, Director
Friedl-Naderer Johanna, Chief Commercial Officer
Cox John, CEO & President
Rhodes Jason P, Director
Lucera Erick, Chief Financial Officer
Kersten Dirk, Director

How to read Form 4 transaction codes