David R. Brennan

CIK: 0001609305

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)1 (16.7%)

Position reduction

Option Exercises (M)0 (0.0%)

Derivative conversions

Awards (A)2 (33.3%)

Compensation grants

Other (G, F, J, C, D, …)3 (50.0%)

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

Companies & Roles (1)

INSM

INSMED Inc

Director

Discretionary Trading P&L

Holdings

Transaction History (6 total)

INSM
INSMED Inc
Sep 9, 2026
Sale(S)
Direct
25K shares at avg. $124.00$3.1M
INSM
INSMED Inc
May 13, 2026
Award(A)
Direct
3.3K shares-
INSM
INSMED Inc
Feb 23, 2026
Gift(G)
Direct
6K shares-
INSM
INSMED Inc
Nov 6, 2025
Gift(G)
Direct
60K shares-
INSM
INSMED Inc
Nov 6, 2025
Gift(G)
Indirect
60K shares-
INSM
INSMED Inc
May 15, 2025
Award(A)
Direct
5.1K shares-

		Type	Shares	Price		Ownership
Sep 9, 2026	INSM INSMED Inc	Sale(S)	25,000	$124.00	$3,100,000	Direct
May 13, 2026	INSM INSMED Inc	Award(A)	3,305	-	$0	Direct
Feb 23, 2026	INSM INSMED Inc	Gift(G)	6,000	-	$0	Direct
Nov 6, 2025	INSM INSMED Inc	Gift(G)	60,000	-	-	Direct
Nov 6, 2025	INSM INSMED Inc	Gift(G)	60,000	-	-	Indirect
May 15, 2025	INSM INSMED Inc	Award(A)	5,058	-	-	Direct

1-6 of 6 transactions

About Brennan David R

Brennan David R (SEC CIK 0001609305) files insider reports with the SEC as Director of INSMED Inc (INSM).

Signal8 holds 5 ownership filings by Brennan David R, all Form 4s, filed between May 19, 2025 and Sep 11, 2026. Those filings report 6 transactions, from May 15, 2025 to Sep 9, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Brennan David R's filings is in BRIDGEWATER, NJ.

Recent filings by Brennan David R

Sep 9, 2026: Open-market sale of INSM shares (Form 4, code S).
May 13, 2026: Grant or award of INSM shares (Form 4, code A).
Feb 23, 2026: Gift of INSM shares (Form 4, code G).
Nov 6, 2025: Gifts of INSM shares (2 lines, Form 4, code G).
May 15, 2025: Grant or award of INSM shares (Form 4, code A).

Other insiders filing for INSMED Inc (INSM)

Koppikar Utpal, Director
Hudson Paul, Director
SHAROKY MELVIN MD, Director
Adsett Roger, Chief Operating Officer
Flammer Martina M.D., Chief Medical Officer
Lewis William, Chair and CEO

How to read Form 4 transaction codes