David Hallal

CIK: 0001457477

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)5 (27.8%)

Position reduction

Option Exercises (M)3 (16.7%)

Derivative conversions

Awards (A)6 (33.3%)

Compensation grants

Other (G, F, J, C, D, …)4 (22.2%)

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

Companies & Roles (3)

SRRK

Scholar Rock Holding Corp

DirectorOfficer

KLRS

Kalaris Therapeutics, Inc.

Director

ITOS

iTeos Therapeutics, Inc.

Director

Discretionary Trading P&L

Holdings

Transaction History (18 total)

SRRK
Scholar Rock Holding Corp
Sep 21, 2026
Gift(G)
Direct
36.7K shares-
KLRS
Kalaris Therapeutics, Inc.
Jun 3, 2026
Award(A)
Stock Option (Right to Buy)
Direct
9K shares-
SRRK
Scholar Rock Holding Corp
Apr 16, 2026
Sale(S)
Direct
30.6K shares at avg. $49.57$1.5M
SRRK
Scholar Rock Holding Corp
Feb 9, 2026
Award(A)
Direct
128K shares-
SRRK
Scholar Rock Holding Corp
Jan 13, 2026
Sale(S)
Direct
57.5K shares at avg. $42.70$2.5M
SRRK
Scholar Rock Holding Corp
Oct 8, 2025
Gift(G)
Direct
205K shares-
ITOS
iTeos Therapeutics, Inc.
Aug 29, 2025
Disposition(D)
Stock Option (Right to Buy)
Direct
146.2K shares-
ITOS
iTeos Therapeutics, Inc.
Aug 29, 2025
Disposition(D)
Stock Option (Right to Buy)
Direct
25.1K shares-
ITOS
iTeos Therapeutics, Inc.
Jun 6, 2025
Exercise(M)
Direct
38.2K shares at avg. $4.30$164K
ITOS
iTeos Therapeutics, Inc.
Jun 6, 2025
Sale(S)
Direct
38.2K shares at avg. $10.24$391K
ITOS
iTeos Therapeutics, Inc.
Jun 5, 2025
Exercise(M)
Direct
38.2K shares at avg. $4.30$164K
ITOS
iTeos Therapeutics, Inc.
Jun 5, 2025
Sale(S)
Direct
38.2K shares at avg. $10.15$388K
ITOS
iTeos Therapeutics, Inc.
Jun 4, 2025
Sale(S)
Direct
38.2K shares at avg. $10.07$385K
ITOS
iTeos Therapeutics, Inc.
Jun 4, 2025
Exercise(M)
Direct
38.2K shares at avg. $4.30$164K
SRRK
Scholar Rock Holding Corp
May 2, 2025
Award(A)
Stock Option (Right to Buy)
Direct
275.2K shares-
SRRK
Scholar Rock Holding Corp
Apr 27, 2025
Award(A)
Direct
1.3M shares-
SRRK
Scholar Rock Holding Corp
Apr 27, 2025
Award(A)
Direct
250K shares-
KLRS
Kalaris Therapeutics, Inc.
Apr 10, 2025
Award(A)
Stock Option (Right to Buy)
Direct
18K shares-

		Type	Shares	Price		Ownership
Sep 21, 2026	SRRK Scholar Rock Holding Corp	Gift(G)	36,652	-	$0	Direct
Jun 3, 2026	KLRS Kalaris Therapeutics, Inc.	Award(A) Stock Option (Right to Buy)	9,000	-	-	Direct
Apr 16, 2026	SRRK Scholar Rock Holding Corp	Sale(S)	30,615	$49.57	$1,517,723	Direct
Feb 9, 2026	SRRK Scholar Rock Holding Corp	Award(A)	128,004	-	$0	Direct
Jan 13, 2026	SRRK Scholar Rock Holding Corp	Sale(S)	57,450	$42.70	$2,453,115	Direct
Oct 8, 2025	SRRK Scholar Rock Holding Corp	Gift(G)	205,000	-	-	Direct
Aug 29, 2025	ITOS iTeos Therapeutics, Inc.	Disposition(D) Stock Option (Right to Buy)	146,160	-	-	Direct
Aug 29, 2025	ITOS iTeos Therapeutics, Inc.	Disposition(D) Stock Option (Right to Buy)	25,140	-	-	Direct
Jun 6, 2025	ITOS iTeos Therapeutics, Inc.	Exercise(M)	38,228	$4.30	$164,380	Direct
Jun 6, 2025	ITOS iTeos Therapeutics, Inc.	Sale(S)	38,228	$10.24	$391,455	Direct
Jun 5, 2025	ITOS iTeos Therapeutics, Inc.	Exercise(M)	38,227	$4.30	$164,376	Direct
Jun 5, 2025	ITOS iTeos Therapeutics, Inc.	Sale(S)	38,227	$10.15	$388,004	Direct
Jun 4, 2025	ITOS iTeos Therapeutics, Inc.	Sale(S)	38,227	$10.07	$384,946	Direct
Jun 4, 2025	ITOS iTeos Therapeutics, Inc.	Exercise(M)	38,227	$4.30	$164,376	Direct
May 2, 2025	SRRK Scholar Rock Holding Corp	Award(A) Stock Option (Right to Buy)	275,167	-	-	Direct
Apr 27, 2025	SRRK Scholar Rock Holding Corp	Award(A)	1,250,000	-	-	Direct
Apr 27, 2025	SRRK Scholar Rock Holding Corp	Award(A)	250,000	-	-	Direct
Apr 10, 2025	KLRS Kalaris Therapeutics, Inc.	Award(A) Stock Option (Right to Buy)	18,000	-	-	Direct

1-18 of 18 transactions

About Hallal David

Hallal David (SEC CIK 0001457477) files insider reports with the SEC as Chief Executive Officer of Scholar Rock Holding Corp (SRRK), Director of Kalaris Therapeutics, Inc. (KLRS) and Director of iTeos Therapeutics, Inc. (ITOS).

Signal8 holds 11 ownership filings by Hallal David, all Form 4s, filed between Apr 11, 2025 and Sep 23, 2026. Those filings report 18 transactions, from Apr 10, 2025 to Sep 21, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Hallal David's filings is in CAMBRIDGE, MA.

Recent filings by Hallal David

Sep 21, 2026: Gift of SRRK shares (Form 4, code G).
Jun 3, 2026: Grant or award of KLRS derivative securities (Form 4, code A).
Apr 16, 2026: Open-market sale of SRRK shares (Form 4, code S).
Feb 9, 2026: Grant or award of SRRK shares (Form 4, code A).
Jan 13, 2026: Open-market sale of SRRK shares (Form 4, code S).

Other insiders filing for Scholar Rock Holding Corp (SRRK)

AKKARAJU SRINIVAS, Director
Woods Keith, Chief Operating Officer
FLIER JEFFREY S., Director
Gilman Michael, Director
Burow Kristina, Director
Reed Joshua, Director

How to read Form 4 transaction codes