Masimo Corporation (MASI) Insider Trading

Last 12 months

Insiders sold $2.56M and bought nothing on the open market.

All of the selling was scheduled in advance under 10b5-1 plans. The last open-market buy by an executive or director was in Aug 2025.

Net open-market

−$2.56M

0 buys · 1 sale

Under a 10b5-1 plan

100%

of the value sold

Insiders who bought / sold

0 / 1

executives and directors

Last open-market buy

Aug 2025

Aug 13, 2025

Get an email when MASI's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
Jan 28	Anand Sampath EVP, Ops & Clinical Research	Sold10b5-1 plan 3 parts	18,680	$136.81 average	$2.56M	31%	Form 4
Aug 12, 2025 – Aug 13, 2025	Michelle Brennan Director	Bought 2 parts	200	$152.80 average	$31k	2.8%	Form 4
Aug 11, 2025	William R Jellison Director	Bought	3,000	$145.98	$438k	168%	Form 4
May 12, 2025	Bilal Muhsin Chief Operating Officer	Sold10b5-1 plan 3 parts	10,000	$163.28 average	$1.63M	29%	Form 4
Mar 14, 2025	Craig B Reynolds Director	Sold10b5-1 plan	2,053	$166.13	$341k	11%	Form 4
Mar 10, 2025	Bilal Muhsin Chief Operating Officer	Sold10b5-1 plan 8 parts	30,000	$167.49 average	$5.02M	55%	Form 4

Jan 2810b5-1 plan
Anand Sampath
EVP, Ops & Clinical Research · sold 18,680 at avg $136.81
$2.56M
31% of stake
Aug 12, 2025 – Aug 13, 2025
Michelle Brennan
Director · bought 200 at avg $152.80
$31k
2.8% of stake
Aug 11, 2025
William R Jellison
Director · bought 3,000 at $145.98
$438k
168% of stake
May 12, 202510b5-1 plan
Bilal Muhsin
Chief Operating Officer · sold 10,000 at avg $163.28
$1.63M
29% of stake
Mar 14, 202510b5-1 plan
Craig B Reynolds
Director · sold 2,053 at $166.13
$341k
11% of stake
Mar 10, 202510b5-1 plan
Bilal Muhsin
Chief Operating Officer · sold 30,000 at avg $167.49
$5.02M
55% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch MASI, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in MASI's SEC filings or

Download this analysis as a PDF (Pro)

Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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