Alexander Cumbo

CIK: 0001685994

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)6 (22.2%)

Position reduction

Option Exercises (M)6 (22.2%)

Derivative conversions

Awards (A)13 (48.1%)

Compensation grants

Other (G, F, J, C, D, …)2 (7.4%)

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

Companies & Roles (5)

STOK

Stoke Therapeutics, Inc.

Director

VOR

Vor Biopharma Inc.

Director

CLYM

Climb Bio, Inc.

Director

SLDB

Solid Biosciences Inc.

DirectorOfficer

VERV

Verve Therapeutics, Inc.

Director

Discretionary Trading P&L

Holdings

Transaction History (27 total)

STOK
Stoke Therapeutics, Inc.
Sep 23, 2026
Award(A)
Director Stock Option (Right to Buy)
Direct
39.7K shares-
VOR
Vor Biopharma Inc.
Jun 11, 2026
Award(A)
Stock option (right to buy)
Direct
56.3K shares-
CLYM
Climb Bio, Inc.
Jun 5, 2026
Award(A)
Stock Option (Right to Buy)
Direct
40K shares-
SLDB
Solid Biosciences Inc.
Feb 18, 2026
Sale(S)
Direct
16.6K shares at avg. $5.82$97K
SLDB
Solid Biosciences Inc.
Feb 13, 2026
Exercise(M)
Direct
30K shares-
SLDB
Solid Biosciences Inc.
Feb 4, 2026
Sale(S)
Direct
48.9K shares at avg. $6.44$315K
SLDB
Solid Biosciences Inc.
Feb 2, 2026
Sale(S)
Direct
80.3K shares at avg. $6.44$517K
SLDB
Solid Biosciences Inc.
Jan 31, 2026
Exercise(M)
Direct
100.4K shares-
SLDB
Solid Biosciences Inc.
Jan 29, 2026
Award(A)
Restricted Stock Units
Direct
169.4K shares-
SLDB
Solid Biosciences Inc.
Jan 29, 2026
Award(A)
Restricted Stock Units
Direct
254.9K shares-
SLDB
Solid Biosciences Inc.
Jan 29, 2026
Exercise(M)
Direct
169.4K shares-
SLDB
Solid Biosciences Inc.
Jan 29, 2026
Award(A)
Employee Stock Option (Right to Buy)
Direct
509.9K shares-
SLDB
Solid Biosciences Inc.
Dec 3, 2025
Sale(S)
Direct
10.8K shares at avg. $5.11$55K
SLDB
Solid Biosciences Inc.
Dec 2, 2025
Exercise(M)
Direct
28.6K shares-
SLDB
Solid Biosciences Inc.
Aug 14, 2025
Award(A)
Restricted Stock Units
Direct
168.8K shares-
SLDB
Solid Biosciences Inc.
Aug 14, 2025
Award(A)
Employee Stock Option (Right to Buy)
Direct
337.5K shares-
VERV
Verve Therapeutics, Inc.
Jul 25, 2025
Disposition(D)
Stock Option (right to buy)
Direct
42.2K shares-
VERV
Verve Therapeutics, Inc.
Jul 25, 2025
Disposition(D)
Stock Option (right to buy)
Direct
136.1K shares-
VOR
Vor Biopharma Inc.
Jul 16, 2025
Award(A)
Stock Option (right to buy)
Direct
60K shares-
VERV
Verve Therapeutics, Inc.
Jun 5, 2025
Award(A)
Stock Option (right to buy)
Direct
42.2K shares-
CLYM
Climb Bio, Inc.
Jun 4, 2025
Award(A)
Stock Option (Right to Buy)
Direct
40K shares-
CLYM
Climb Bio, Inc.
Mar 28, 2025
Award(A)
Stock Option (Right to Buy)
Direct
80K shares-
SLDB
Solid Biosciences Inc.
Feb 14, 2025
Sale(S)
Direct
11.4K shares at avg. $3.96$45K
SLDB
Solid Biosciences Inc.
Feb 13, 2025
Exercise(M)
Direct
30K shares-
SLDB
Solid Biosciences Inc.
Jan 31, 2025
Award(A)
Restricted Stock Units
Direct
401.6K shares-

		Type	Shares	Price		Ownership
Sep 23, 2026	STOK Stoke Therapeutics, Inc.	Award(A) Director Stock Option (Right to Buy)	39,674	-	-	Direct
Jun 11, 2026	VOR Vor Biopharma Inc.	Award(A) Stock option (right to buy)	56,345	-	-	Direct
Jun 5, 2026	CLYM Climb Bio, Inc.	Award(A) Stock Option (Right to Buy)	40,000	-	-	Direct
Feb 18, 2026	SLDB Solid Biosciences Inc.	Sale(S)	16,644	$5.82	$96,923	Direct
Feb 13, 2026	SLDB Solid Biosciences Inc.	Exercise(M)	30,031	-	$0	Direct
Feb 4, 2026	SLDB Solid Biosciences Inc.	Sale(S)	48,913	$6.44	$315,093	Direct
Feb 2, 2026	SLDB Solid Biosciences Inc.	Sale(S)	80,258	$6.44	$516,613	Direct
Jan 31, 2026	SLDB Solid Biosciences Inc.	Exercise(M)	100,400	-	$0	Direct
Jan 29, 2026	SLDB Solid Biosciences Inc.	Award(A) Restricted Stock Units	169,401	-	-	Direct
Jan 29, 2026	SLDB Solid Biosciences Inc.	Award(A) Restricted Stock Units	254,900	-	-	Direct
Jan 29, 2026	SLDB Solid Biosciences Inc.	Exercise(M)	169,401	-	$0	Direct
Jan 29, 2026	SLDB Solid Biosciences Inc.	Award(A) Employee Stock Option (Right to Buy)	509,850	-	-	Direct
Dec 3, 2025	SLDB Solid Biosciences Inc.	Sale(S)	10,808	$5.11	$55,229	Direct
Dec 2, 2025	SLDB Solid Biosciences Inc.	Exercise(M)	28,612	-	-	Direct
Aug 14, 2025	SLDB Solid Biosciences Inc.	Award(A) Restricted Stock Units	168,750	-	-	Direct
Aug 14, 2025	SLDB Solid Biosciences Inc.	Award(A) Employee Stock Option (Right to Buy)	337,500	-	-	Direct
Jul 25, 2025	VERV Verve Therapeutics, Inc.	Disposition(D) Stock Option (right to buy)	42,200	-	-	Direct
Jul 25, 2025	VERV Verve Therapeutics, Inc.	Disposition(D) Stock Option (right to buy)	136,139	-	-	Direct
Jul 16, 2025	VOR Vor Biopharma Inc.	Award(A) Stock Option (right to buy)	60,000	-	-	Direct
Jun 5, 2025	VERV Verve Therapeutics, Inc.	Award(A) Stock Option (right to buy)	42,200	-	-	Direct
Jun 4, 2025	CLYM Climb Bio, Inc.	Award(A) Stock Option (Right to Buy)	40,000	-	-	Direct
Mar 28, 2025	CLYM Climb Bio, Inc.	Award(A) Stock Option (Right to Buy)	80,000	-	-	Direct
Feb 14, 2025	SLDB Solid Biosciences Inc.	Sale(S)	11,365	$3.96	$45,005	Direct
Feb 13, 2025	SLDB Solid Biosciences Inc.	Exercise(M)	30,031	-	-	Direct
Jan 31, 2025	SLDB Solid Biosciences Inc.	Award(A) Restricted Stock Units	401,600	-	-	Direct

1-25 of 27 transactions

About Cumbo Alexander

Cumbo Alexander (SEC CIK 0001685994) files insider reports with the SEC as Director of Stoke Therapeutics, Inc. (STOK), Director of Vor Biopharma Inc. (VOR) and Director of Climb Bio, Inc. (CLYM). Signal8 also holds filings tied to 2 other companies.

Signal8 holds 20 ownership filings by Cumbo Alexander (3 Form 3, 17 Form 4), filed between Dec 4, 2024 and Sep 25, 2026. Those filings report 27 transactions, from Dec 2, 2024 to Sep 23, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Cumbo Alexander's filings is in BEDFORD, MA.

Recent filings by Cumbo Alexander

Sep 23, 2026: Grant or award of STOK derivative securities (Form 4, code A).
Jun 11, 2026: Grant or award of VOR derivative securities (Form 4, code A).
Jun 5, 2026: Grant or award of CLYM derivative securities (Form 4, code A).
Feb 18, 2026: Open-market sale of SLDB shares (Form 4, code S).
Feb 13, 2026: Option exercise of SLDB shares (Form 4, code M).

Other insiders filing for Stoke Therapeutics, Inc. (STOK)

Allan Jonathan, GENERAL COUNSEL & CORP SEC
Ticho Barry, CHIEF MEDICAL OFFICER
Kaye Edward M. MD, Director
Harrison Seth Loring, Director
McCauley Thomas, Chief Scientific Officer
TZIANABOS ARTHUR, Director

How to read Form 4 transaction codes