William Lewis
CIK 1402051 · Chair and CEO · last filed 2026-06-10
William Lewis is a Chair and CEO who has filed 96 SEC Form 4 insider transactions across 4 companies since 2010. The most recent filing shows the insider sold $612.6K of INSM on Jun 10, 2026. Across all open-market trades the lifetime net is −$115.6M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $48.4M across reported positions.
"Disclosed insider exposure" sums this person's most-recently-reported share counts across each company they're an insider in, multiplied by the current underlying price. It is not net worth — it misses retail holdings, private investments, real estate, index funds, and any company where the person isn't an SEC-reporting insider. For informational purposes only.
$48.42M
4
96
-$115.62M
Holdings By Company
| Symbol | Role | Shares | Price | Disclosed Exposure | Lifetime OM Net | Filings | Latest Filed |
|---|---|---|---|---|---|---|---|
| INSM | Chair and CEO | 492,841 | $97.85 | $48.22M | -$115.62M | 91 | 2026-06-10 |
| NAMSW | Director | 10,360 | $18.80 | $194.8K | $0 | 3 | 2026-01-09 |
| QURE | Director | — | $27.57 | — | $0 | 1 | 2017-01-31 |
| Aegerion Pharmaceuticals, Inc. (AEGR) Delisted | President, PFO and Treasurer | 73,960 | — | — | $0 | 1 | 2010-10-27 |
Recent Filings
96 filings| Filed | Symbol | Action | Net Shares | Net $ | Link |
|---|---|---|---|---|---|
| 2026-06-10 | INSM | Sell (S) | −6,515 | -$612.6K | EDGAR |
| 2026-06-05 | INSM | Sell (S) | −7,605 | -$777.8K | EDGAR |
| 2026-05-20 | INSM | Mixed | −14,865 | -$2.45M | EDGAR |
| 2026-05-15 | INSM | Sell (S) | −13,283 | -$1.54M | EDGAR |
| 2026-05-06 | INSM | Mixed | — | -$1.20M | EDGAR |
| 2026-04-17 | INSM | Mixed | — | -$1.27M | EDGAR |
| 2026-04-08 | INSM | Mixed | — | -$1.48M | EDGAR |
| 2026-03-20 | INSM | Mixed | — | -$1.27M | EDGAR |
| 2026-03-05 | INSM | Mixed | — | -$1.30M | EDGAR |
| 2026-02-23 | INSM | Mixed | — | -$1.35M | EDGAR |