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Charles Dadswell

CIK 1575229 · EVP, General Counsel · last filed 2026-06-12

Charles Dadswell is an EVP, General Counsel who has filed 115 SEC Form 4 insider transactions across 2 companies since 2014. Across all open-market trades the lifetime net is −$12.2M, making them a net seller over the disclosed history. Current disclosed insider exposure totals $5.9M across reported positions. 116 SEC filings were submitted jointly with ILLUMINA, INC.

"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.

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Disclosed Exposure

$5.94M

Companies

2

Total Filings

115

Lifetime Open-Market Net

-$12.16M

Filer Profile

Reported Address
C/O MASIMO CORPORATION
52 DISCOVERY
IRVINE, CA 92618
Related Filers
ILLUMINA, INC. — 116 joint filings, latest 2024-10-15
MASIMO CORP — 4 joint filings, latest 2026-06-12
Profile details as reported on the filer's SEC submissions — for individual insiders the address is often in care of the issuer. Related filers are identified from jointly filed SEC submissions and shared reported addresses. View filings on SEC EDGAR.

Holdings By Company

Latest on-record share count from this person's most recent non-derivative Form 4 transaction in each company. Disclosed exposure = shares × current underlying price.
Symbol Role Shares Price Disclosed Exposure Lifetime OM Net Filings Latest Filed
MASIMO CORP (MASI) Delisted EVP, General Counsel — $179.95 — $0 2 2026-03-10
ILMN SVP, General Counsel 26,790 $221.66 $5.94M -$12.16M 110 2024-09-17

Recent Filings

115 filings
Insider activity across all companies, newest first. Form 4 rows are post-trade confirmations (buys, sells, grants, exercises). Notice (144) rows are pre-trade notices of intent to sell restricted or control stock under Rule 144 — they may not all execute. Compare adjacent dates to see which notices became actual sales.
Filed Symbol Action Net Shares Net $ Link
2026-06-12 — Disp (D) — $0
2026-03-10 MASIMO CORP (MASI) Delisted Grant (A) — $0 EDGAR
2025-09-03 MASIMO CORP (MASI) Delisted — — $0 EDGAR
2024-10-15 ILMN Notice (144) −4,948 -$720.1K EDGAR
2024-09-17 ILMN Disp (D) −989 -$125.6K EDGAR
2024-08-19 ILMN Disp (D) −989 -$122.2K EDGAR
2024-08-15 ILMN Notice (144) −3,956 -$483.7K EDGAR
2024-03-07 ILMN Grant (A) +6,683 $0 EDGAR
2023-11-07 ILMN Tax (F) −1,523 -$171.9K EDGAR
2023-03-03 ILMN Grant (A) +6,926 $0 EDGAR
Showing 1–10 of 115
Page 1 of 12
Form 4 codes: P = open-market purchase · S = open-market sale · A = grant/award · M = option exercise · F = tax withholding at vest · G = bona-fide gift · D = disposition to issuer · J = other (see filing footnote). Only P / S codes carry directional signal.
Notice (144 / 144/A): Form 144 is a notice of intent to sell restricted/control stock under Rule 144, filed before the sale; 144/A is an amendment. Many notices are pre-scheduled under Rule 10b5-1 plans. A Form 4 with code S typically follows within a few days when the planned sale executes; missing follow-up Form 4s suggest the notice was cancelled or modified.