InsiderChair and CEO

William Lewis Insider Trading Activity

Every SEC Form 4 transaction reported by William Lewis, sourced directly from SEC EDGAR and updated as new filings are accepted.

By · Insider-trading data from SEC EDGAR
Latest filing:

Compiled automatically from SEC EDGAR Form 4 filings and refreshed daily. Figures count purchases (code P) and sales (code S) only — not grants, option exercises, or gifts. How this page is built. Not investment advice.

Quick Answer

Is William Lewis buying or selling?

William Lewis reported 1 open-market buys ($249.6K) and 59 sells ($120.0M) across 60 Form 4 filings at 1 company — a net selling position of $119.7M.

Source: SEC EDGAR Form 4

What stands out

  • All 60 of William Lewis's Form 4 filings are for one company, INSMED Inc (INSM).
  • The most recent Form 4 was accepted on Jul 24, 2026 (2 months ago).
  • In the last 12 months: no open-market purchases and 19 sales ($31.2M).
  • The largest open-market sale in the last 12 months was $3.2M of INSMED Inc (INSM) on Jan 13, 2026. SEC ↗

Key Statistics (as of Jul 24, 2026)

Total Form 4 filings
60
SEC EDGAR
Companies
1
Buys (1)
$249.6K
Sells (59)
$120.0M

Insider sentiment

Net selling

Net insider flow of $119.7M in net selling, filed between Nov 2, 2018 – Jul 24, 2026.

Companies William Lewis files for

#CompanyForm 4 filings
1INSMINSMED Inc60

Recent William Lewis transactions

DateTickerRoleTypeSharesValueFiling
Jul 24, 2026INSMChair and CEOSale10.7K$1.1MSEC ↗
Jul 10, 2026INSMChair and CEOSale10.7K$1.3MSEC ↗
Jun 26, 2026INSMChair and CEOSale21.4K$2.2MSEC ↗
Jun 10, 2026INSMChair and CEOSale6.5K$612.6KSEC ↗
Jun 5, 2026INSMChair and CEOSale7.6K$777.8KSEC ↗
May 20, 2026INSMChair and CEOSale25.6K$2.7MSEC ↗
May 15, 2026INSMChair and CEOSale13.3K$1.5MSEC ↗
May 6, 2026INSMChair and CEOSale10.7K$1.5MSEC ↗
Apr 17, 2026INSMChair and CEOSale10.7K$1.5MSEC ↗
Apr 8, 2026INSMChair and CEOSale10.7K$1.7MSEC ↗
Mar 20, 2026INSMChair and CEOSale10.7K$1.5MSEC ↗
Feb 23, 2026INSMChair and CEOSale10.7K$1.6MSEC ↗
Feb 11, 2026INSMChair and CEOSale13.4K$2.0MSEC ↗
Feb 4, 2026INSMChair and CEOSale3.0K$470.4KSEC ↗
Jan 22, 2026INSMChair and CEOSale10.7K$1.7MSEC ↗
Jan 13, 2026INSMChair and CEOSale19.2K$3.2MSEC ↗
Jan 8, 2026INSMChair and CEOSale9.7K$1.7MSEC ↗
Dec 19, 2025INSMChair and CEOSale10.7K$1.8MSEC ↗
Dec 5, 2025INSMChair and CEOSale10.7K$2.2MSEC ↗
Aug 20, 2025INSMChair and CEOSale6.9K$881.5KSEC ↗
Aug 6, 2025INSMChair and CEOSale6.8K$750.0KSEC ↗
Jul 15, 2025INSMChair and CEOSale6.8K$699.2KSEC ↗
Jul 2, 2025INSMChair and CEOSale6.8K$671.6KSEC ↗
Jun 18, 2025INSMChair and CEOSale135.0K$13.6MSEC ↗
Jun 4, 2025INSMChair and CEOSale12.3K$878.3KSEC ↗

Showing the 25 most recent filings of 60. Screen every filing.

William Lewis insider trading FAQ

Is William Lewis buying or selling?

Across 60 SEC Form 4 filings, William Lewis reported 1 open-market purchases totaling $249.6K and 59 sales totaling $120.0M — a net selling position of $119.7M.

Which companies does William Lewis file Form 4s for?

William Lewis has reported insider transactions at 1 company, most often INSMED Inc (INSM).

How far back does William Lewis's filing history go?

Trabud holds William Lewis's SEC Form 4 filings from Nov 2, 2018 – Jul 24, 2026, sourced directly from SEC EDGAR.

Where does Trabud get William Lewis's insider trading data?

Directly from SEC EDGAR Form 4 filings. Every transaction on this page is a real filing accepted by the SEC, updated as new filings arrive.

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