Lewis William
Chair and CEO
Lewis William has filed 22 SEC Form 4 filings (106 transaction rows) across 2 companies, including INSM, NAMS, with disclosures dating back to 2025. 22 of those filings fall inside the rolling window. Most recent filing: Jul 24, 2026.
On the most recent filing, Lewis William is listed as Chair and CEO at INSMED Inc. Inside the rolling window, Lewis William reported no open-market purchases and 22 open-market sales totaling $32.8M in INSM. The largest disclosed transaction in the window is a sale of 19,215 INSM shares on Jan 12, 2026, worth $3.2M.
Companies traded
Other insiders at INSM
Insider Buying
$0
reported purchases (SEC code P)
Insider Selling
$32.8M
reported sales (SEC code S)
Companies
2
in the rolling window
| Source | |||||||
|---|---|---|---|---|---|---|---|
| INSM | Chair and CEO | Sale | 10,700 | $1.1M | Jul 24 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 10,699 | $1.3M | Jul 10 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 21,398 | $2.2M | Jun 26 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 6,515 | $613K | Jun 10 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 7,605 | $778K | Jun 5 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 25,564 | $2.7M | May 20 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 13,283 | $1.5M | May 15 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 10,699 | $1.5M | May 6 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 10,699 | $1.5M | Apr 17 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 10,699 | $1.7M | Apr 8 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 10,699 | $1.5M | Mar 20 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 10,699 | $1.6M | Mar 5 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 10,699 | $1.6M | Feb 23 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 13,396 | $2.0M | Feb 11 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 3,009 | $470K | Feb 4 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 10,699 | $1.7M | Jan 22 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 19,215 | $3.2M | Jan 13 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 4,096 | $710K | Jan 8 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 2,357 | $413K | Jan 8 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 3,223 | $561K | Jan 8 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 10,699 | $1.8M | Dec 19 | SEC ↗ | |
| INSM | Chair and CEO | Sale | 10,699 | $2.2M | Dec 5 | SEC ↗ |
Frequently asked questions
How many SEC Form 4 filings has Lewis William made?
Lewis William has filed 22 SEC Form 4 filings (106 transaction rows) across 2 companies, including INSM, NAMS since 2025.
Which companies does Lewis William trade?
Lewis William has filed SEC Form 4 disclosures for 2 companies, including INSM, NAMS.
When was Lewis William's most recent SEC Form 4 filing?
Lewis William's most recent SEC Form 4 filing on Tracefour is dated Jul 24, 2026.
What is Lewis William's job title?
On the most recent SEC Form 4 filings tracked by Tracefour, Lewis William is listed as Chair and CEO.
What is Lewis William's total buy and sell value in the current window?
Inside the rolling retention window, Lewis William bought $0 and sold $32.8M based on SEC Form 4 filings.
What was Lewis William's largest disclosed transaction?
The largest disclosed transaction in the current window is a sale of 19,215 INSM shares on 2026-01-12, worth $3.2M, per SEC Form 4 filings.