William Lewis

CIK: 0001402051

Transaction Breakdown

Open Market Buys (P)0 (0.0%)

High conviction signal

Open Market Sales (S)168 (72.7%)

Position reduction

Option Exercises (M)56 (24.2%)

Derivative conversions

Awards (A)7 (3.0%)

Compensation grants

Other (G, F, J, C, D, …)0 (0.0%)

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

Companies & Roles (2)

INSM

INSMED Inc

DirectorOfficer

NAMS

NewAmsterdam Pharma Co N.V.

Director

Discretionary Trading P&L

Holdings

Transaction History (231 total)

INSM
INSMED Inc
Jul 23, 2026
Exercise(M)
Direct
4.4K shares at avg. $17.16$76K
INSM
INSMED Inc
Jul 23, 2026
Sale(S)
Direct
5.9K shares at avg. $106.43$625K
INSM
INSMED Inc
Jul 23, 2026
Sale(S)
Direct
4.8K shares at avg. $105.62$510K
INSM
INSMED Inc
Jul 23, 2026
Exercise(M)
Direct
6.3K shares at avg. $30.46$191K
INSM
INSMED Inc
Jul 9, 2026
Exercise(M)
Direct
6.3K shares at avg. $30.46$191K
INSM
INSMED Inc
Jul 9, 2026
Sale(S)
Direct
5K shares at avg. $116.55$583K
INSM
INSMED Inc
Jul 9, 2026
Exercise(M)
Direct
4.4K shares at avg. $17.16$76K
INSM
INSMED Inc
Jul 9, 2026
Sale(S)
Direct
2.3K shares at avg. $117.62$275K
INSM
INSMED Inc
Jul 9, 2026
Sale(S)
Direct
3.4K shares at avg. $118.52$398K
INSM
INSMED Inc
Jun 25, 2026
Sale(S)
Direct
2.5K shares at avg. $105.27$259K
INSM
INSMED Inc
Jun 25, 2026
Sale(S)
Direct
1.8K shares at avg. $103.10$189K
INSM
INSMED Inc
Jun 25, 2026
Sale(S)
Direct
12.1K shares at avg. $102.34$1.2M
INSM
INSMED Inc
Jun 25, 2026
Exercise(M)
Direct
8.9K shares at avg. $17.16$152K
INSM
INSMED Inc
Jun 25, 2026
Exercise(M)
Direct
12.5K shares at avg. $30.46$381K
INSM
INSMED Inc
Jun 25, 2026
Sale(S)
Direct
1.3K shares at avg. $106.27$137K
INSM
INSMED Inc
Jun 25, 2026
Sale(S)
Direct
3.7K shares at avg. $104.28$388K
INSM
INSMED Inc
Jun 8, 2026
Sale(S)
Direct
6.5K shares at avg. $94.03$613K
INSM
INSMED Inc
Jun 3, 2026
Sale(S)
Direct
7.6K shares at avg. $102.27$778K
INSM
INSMED Inc
May 18, 2026
Exercise(M)
Direct
4.4K shares at avg. $17.16$76K
INSM
INSMED Inc
May 18, 2026
Exercise(M)
Direct
6.3K shares at avg. $30.46$191K
INSM
INSMED Inc
May 18, 2026
Sale(S)
Direct
8K shares at avg. $106.97$853K
INSM
INSMED Inc
May 18, 2026
Sale(S)
Direct
11.8K shares at avg. $106.39$1.3M
INSM
INSMED Inc
May 18, 2026
Sale(S)
Direct
5.8K shares at avg. $105.32$606K
INSM
INSMED Inc
May 13, 2026
Sale(S)
Direct
13.3K shares at avg. $116.18$1.5M
INSM
INSMED Inc
May 4, 2026
Exercise(M)
Direct
4.4K shares at avg. $17.16$76K

		Type	Shares	Price		Ownership
Jul 23, 2026	INSM INSMED Inc	Exercise(M)	4,440	$17.16	$76,190	Direct
Jul 23, 2026	INSM INSMED Inc	Sale(S)	5,872	$106.43	$624,957	Direct
Jul 23, 2026	INSM INSMED Inc	Sale(S)	4,828	$105.62	$509,933	Direct
Jul 23, 2026	INSM INSMED Inc	Exercise(M)	6,260	$30.46	$190,680	Direct
Jul 9, 2026	INSM INSMED Inc	Exercise(M)	6,259	$30.46	$190,649	Direct
Jul 9, 2026	INSM INSMED Inc	Sale(S)	5,005	$116.55	$583,333	Direct
Jul 9, 2026	INSM INSMED Inc	Exercise(M)	4,440	$17.16	$76,190	Direct
Jul 9, 2026	INSM INSMED Inc	Sale(S)	2,335	$117.62	$274,643	Direct
Jul 9, 2026	INSM INSMED Inc	Sale(S)	3,359	$118.52	$398,109	Direct
Jun 25, 2026	INSM INSMED Inc	Sale(S)	2,456	$105.27	$258,543	Direct
Jun 25, 2026	INSM INSMED Inc	Sale(S)	1,836	$103.10	$189,292	Direct
Jun 25, 2026	INSM INSMED Inc	Sale(S)	12,091	$102.34	$1,237,393	Direct
Jun 25, 2026	INSM INSMED Inc	Exercise(M)	8,880	$17.16	$152,381	Direct
Jun 25, 2026	INSM INSMED Inc	Exercise(M)	12,518	$30.46	$381,298	Direct
Jun 25, 2026	INSM INSMED Inc	Sale(S)	1,292	$106.27	$137,301	Direct
Jun 25, 2026	INSM INSMED Inc	Sale(S)	3,723	$104.28	$388,234	Direct
Jun 8, 2026	INSM INSMED Inc	Sale(S)	6,515	$94.03	$612,605	Direct
Jun 3, 2026	INSM INSMED Inc	Sale(S)	7,605	$102.27	$777,763	Direct
May 18, 2026	INSM INSMED Inc	Exercise(M)	4,440	$17.16	$76,190	Direct
May 18, 2026	INSM INSMED Inc	Exercise(M)	6,259	$30.46	$190,649	Direct
May 18, 2026	INSM INSMED Inc	Sale(S)	7,975	$106.97	$853,086	Direct
May 18, 2026	INSM INSMED Inc	Sale(S)	11,836	$106.39	$1,259,232	Direct
May 18, 2026	INSM INSMED Inc	Sale(S)	5,753	$105.32	$605,906	Direct
May 13, 2026	INSM INSMED Inc	Sale(S)	13,283	$116.18	$1,543,219	Direct
May 4, 2026	INSM INSMED Inc	Exercise(M)	4,440	$17.16	$76,190	Direct

1-25 of 231 transactions

…

About Lewis William

Lewis William (SEC CIK 0001402051) files insider reports with the SEC as Chair and CEO of INSMED Inc (INSM) and Director of NewAmsterdam Pharma Co N.V. (NAMS).

Signal8 holds 45 ownership filings by Lewis William, all Form 4s, filed between Dec 13, 2024 and Jul 24, 2026. Those filings report 231 transactions, from Dec 12, 2024 to Jul 23, 2026. Signal8's Form 4 history starts in Sep 2024.

The business address on Lewis William's filings is in BRIDGEWATER, NJ.

Recent filings by Lewis William

Jul 23, 2026: Option exercise of INSM shares (Form 4, code M).
Jul 23, 2026: Open-market sales of INSM shares (2 lines, Form 4, code S).
Jul 23, 2026: Option exercise of INSM shares (Form 4, code M).
Jul 9, 2026: Option exercise of INSM shares (Form 4, code M).
Jul 9, 2026: Open-market sale of INSM shares (Form 4, code S).

Other insiders filing for INSMED Inc (INSM)

Koppikar Utpal, Director
Hudson Paul, Director
Brennan David R, Director
SHAROKY MELVIN MD, Director
Adsett Roger, Chief Operating Officer
Flammer Martina M.D., Chief Medical Officer

How to read Form 4 transaction codes