Company profile
Masimo Corp Insider Trading
MASIEvery SEC Form 4 insider trading filing for Masimo Corp (MASI) since April 2023 — open-market buys and sells by directors and officers, option exercises, and cluster activity, updated as each filing is reported to the SEC. Why 2023?
- Exchange
- Nasdaq
- Sector
- Electromedical & Electrotherapeutic Apparatus
- CIK
- 0000937556
- Filings
- 91
- Insiders
- 29
- Last filing
- 2026-06-10
Activity summary
No insider transactions in the last 30 days. The most recent was on June 10, 2026, when Young Micah W sold 10,485 shares. 91 filings from 29 insiders are on record below.
Three year balance
Buy and sell value by quarter, Q2 23 to Q2 26. Masimo Corp insiders are net sellers across the period shown.
Bars below the rule are sales, above are purchases. Largest quarter on the chart is $866.4M.
90 day insight
Over the last 90 days, Masimo Corp insiders sold $29.7M across 50 transactions with no open-market purchases.
- Most active insider: Young Micah W with 12 transactions totaling $13.0M.
- Largest single sale: $6.1M by Sampath Anand on Jun 10, 2026.
Activity skews bearish — sales outpace buys.
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jun 10, 2026 | Young Micah W | MASI | Disposition | 10,485 | $180.00 | $1.89M |
| Jun 10, 2026 | Szyman Catherine M. | MASI | Disposition | 39,904 | — | — |
| Jun 10, 2026 | Young Micah W | MASI | Disposition | 4,175 | $93.05 | $388K |
| Jun 10, 2026 | Young Micah W | MASI | Disposition | 16,898 | $180.00 | $3.04M |
| Jun 10, 2026 | Young Micah W | MASI | Disposition | 7,739 | $13.48 | $104K |
45 more transactions hidden
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Query this yourself
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-H "X-Api-Key: $KEY"Top insiders
By total value filed.
Institutional Ownership
Top 13F-HR holders of Masimo Corp as of 2026-06-30
Data source: quarterly 13F-HR filings — institutional holders report positions within 45 days of quarter end. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →