William Lewis Insider Trading Activity

Corporate InsiderCEO · CIK 1402051

Total trades

$46.8M

Total volume

Jul 9, 2026

Last activity

INSM

INSMED Inc

William Lewis has been net-selling over the last 12 months with 0 purchases and 72 sales across 1 company.

INSM is the most-traded position with 72 trades. The largest single transaction was a sale of INSM for $1.5M on May 13, 2026.

Performance Scorecard

Forward stock performance after each transaction by William Lewis. Buy returns measure price movement after open-market purchases; sell-avoided measures the loss avoided after open-market sales. Success rate counts trades where the insider's direction was right.

PERIOD	AVG BUY RETURN	AVG SELL AVOIDED	SUCCESS RATE	TRADES
30 days	—	+0.9%	56%	87
90 days	—	-5.4%	68%	75
120 days	—	-10.0%	65%	68

Performance based on stock price movement after each transaction date. Past results do not predict future returns. Not financial advice.

Price & Trades

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INSM · INSMED Inc

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Recent Trades

Showing the 50 most recent of 90 disclosed trades.

DATE	TICKER	TYPE	SHARES	PRICE	VALUE	Δ OWNED	ROLE
Jul 9, 2026	INSM	Sell	5,005	$116.55	$583K	−1.9%	CEO
Jul 9, 2026	INSM	Sell	2,335	$117.62	$275K	−0.9%	CEO
Jul 9, 2026	INSM	Sell	3,359	$118.52	$398K	−1.3%	CEO
Jun 8, 2026	INSM	Sell	6,515	$94.03	$613K	−2.5%	CEO
Jun 3, 2026	INSM	Sell	7,605	$102.27	$778K	−2.8%	CEO
May 18, 2026	INSM	Sell	11,836	$106.39	$1.3M	−4.0%	CEO
May 18, 2026	INSM	Sell	5,753	$105.32	$606K	−1.9%	CEO
May 18, 2026	INSM	Sell	7,975	$106.97	$853K	−2.8%	CEO
May 13, 2026	INSM	Sell	13,283	$116.18	$1.5M	−4.4%	CEO
May 4, 2026	INSM	Sell	433	$134.18	$58K	−0.1%	CEO
May 4, 2026	INSM	Sell	599	$135.18	$81K	−0.2%	CEO
May 4, 2026	INSM	Sell	5,318	$137.01	$729K	−1.7%	CEO
May 4, 2026	INSM	Sell	2,721	$137.86	$375K	−0.9%	CEO
May 4, 2026	INSM	Sell	1,247	$139.09	$173K	−0.4%	CEO
May 4, 2026	INSM	Sell	381	$139.60	$53K	−0.1%	CEO
Apr 16, 2026	INSM	Sell	2,255	$144.66	$326K	−0.7%	CEO
Apr 16, 2026	INSM	Sell	825	$145.79	$120K	−0.3%	CEO
Apr 16, 2026	INSM	Sell	2,246	$142.99	$321K	−0.7%	CEO
Apr 16, 2026	INSM	Sell	5,373	$143.81	$773K	−1.7%	CEO
Apr 6, 2026	INSM	Sell	8,478	$163.23	$1.4M	−2.7%	CEO
Apr 6, 2026	INSM	Sell	1,434	$164.01	$235K	−0.5%	CEO
Apr 6, 2026	INSM	Sell	787	$161.73	$127K	−0.3%	CEO
Mar 19, 2026	INSM	Sell	4,533	$144.11	$653K	−1.5%	CEO
Mar 19, 2026	INSM	Sell	4,537	$143.42	$651K	−1.5%	CEO
Mar 19, 2026	INSM	Sell	1,629	$142.17	$232K	−0.5%	CEO
Mar 5, 2026	INSM	Sell	2,589	$145.27	$376K	−0.8%	CEO
Mar 5, 2026	INSM	Sell	2,083	$144.23	$300K	−0.7%	CEO
Mar 5, 2026	INSM	Sell	2,128	$147.54	$314K	−0.7%	CEO
Mar 5, 2026	INSM	Sell	3,899	$146.66	$572K	−1.3%	CEO
Feb 19, 2026	INSM	Sell	1,891	$150.10	$284K	−0.6%	CEO
Feb 19, 2026	INSM	Sell	1,988	$149.17	$297K	−0.6%	CEO
Feb 19, 2026	INSM	Sell	3,413	$151.12	$516K	−1.1%	CEO
Feb 19, 2026	INSM	Sell	2,377	$151.92	$361K	−0.8%	CEO
Feb 19, 2026	INSM	Sell	1,030	$153.38	$158K	−0.3%	CEO
Feb 9, 2026	INSM	Sell	4,888	$147.17	$719K	−1.6%	CEO
Feb 9, 2026	INSM	Sell	7,221	$148.02	$1.1M	−2.3%	CEO
Feb 9, 2026	INSM	Sell	1,287	$148.83	$192K	−0.4%	CEO
Feb 3, 2026	INSM	Sell	3,009	$156.34	$470K	−1.0%	CEO
Jan 20, 2026	INSM	Sell	1,243	$158.37	$197K	−0.4%	CEO
Jan 20, 2026	INSM	Sell	5,967	$158.99	$949K	−1.9%	CEO
Jan 20, 2026	INSM	Sell	2,229	$159.85	$356K	−0.7%	CEO
Jan 20, 2026	INSM	Sell	254	$160.70	$41K	−0.1%	CEO
Jan 20, 2026	INSM	Sell	1,006	$156.80	$158K	−0.3%	CEO
Jan 12, 2026	INSM	Sell	297	$171.31	$51K	−0.1%	CEO
Jan 12, 2026	INSM	Sell	3,974	$167.73	$667K	−1.2%	CEO
Jan 12, 2026	INSM	Sell	160	$170.24	$27K	−0.1%	CEO
Jan 12, 2026	INSM	Sell	315	$174.86	$55K	−0.1%	CEO
Jan 12, 2026	INSM	Sell	6,996	$169.57	$1.2M	−2.2%	CEO
Jan 12, 2026	INSM	Sell	7,176	$168.63	$1.2M	−2.2%	CEO
Jan 8, 2026	INSM	Sell	3,223	$174.17	$561K	−1.0%	CEO