NASDAQ:MASI

Masimo Stock Insider Trading

Healthcare > Medical - Instruments & Supplies

Buy MASI

*Your capital is at risk

$178.78

+0.0500 (+0.0280%)

At Close: Jun 03, 2026

Masimo Stock Insider Power

Based on the 100 latest insides trades, we have calculated the insider power to be positive at 37.08. In total, the insiders bought 660.52K and sold 325.03K MASI shares in the last 100 trades. The insider score can be negative despite buy/sell ratio being positive. The score focuses on the quality of the trades.

Insider Power (Last 100 transactions)	37.08
● Buy	660.52K shares
● Sell	325.03K shares
80% Buy Activity Weak Negative Correlation
Buy Signal Medium Confidence Mar 12, 2026 Analysis Breakdown: Supported by a positive Insider Power Score of 37.08. Confidence increased due to high data reliability score of 100. Supported by overwhelming buy-side pressure (80% buys).

Historical Insider Trades

Date	Type	Person	Role	Amount
Apr 29, 2026 Buy	Restricted Stock Units M-Exempt	Scannell Timothy J Director	Director	1 225 Value: $218.6K
Apr 29, 2026 Buy	Common Stock M-Exempt	Scannell Timothy J Director	Director	1 225 Value: $218.6K
Apr 29, 2026 Buy	Common Stock M-Exempt	Lane Wendy E Director	Director	1 225 Value: $218.6K
Apr 29, 2026 Buy	Restricted Stock Units M-Exempt	Lane Wendy E Director	Director	1 225 Value: $218.6K
Apr 29, 2026 Buy	Common Stock M-Exempt	Brennan Michelle Chairman Of The Board	CEO / President	1 225 Value: $218.6K
Apr 29, 2026 Buy	Restricted Stock Units M-Exempt	Brennan Michelle Chairman Of The Board	CEO / President	1 225 Value: $218.6K
Apr 23, 2026 Buy	Restricted Stock Units A-Award	Scannell Timothy J Director	Director	1 119 Value: $200.0K
Apr 23, 2026 Buy	Restricted Stock Units A-Award	Lane Wendy E Director	Director	1 119 Value: $200.0K
Apr 23, 2026 Buy	Restricted Stock Units A-Award	Brennan Michelle Chairman Of The Board	CEO / President	1 119 Value: $200.0K
Apr 21, 2026 Buy	Restricted Stock Units M-Exempt	Hellmann Elisabeth A Chief Human Resources Officer	Officer	335 Value: $59.8K
Apr 21, 2026 Buy	Common Stock M-Exempt	Hellmann Elisabeth A Chief Human Resources Officer	Officer	335 Value: $59.8K
Apr 21, 2026 Sell	Common Stock F-InKind	Hellmann Elisabeth A Chief Human Resources Officer	Officer	121 Value: $21.6K
Mar 12, 2026 Buy	Forward Sale Contract (obligation to sell) J-Other	Politan Capital Management Lp Director By Deputization	Director	130 869 Value: $23.0M
Mar 11, 2026 Buy	Restricted Stock Units M-Exempt	Young Micah W EVP & Chief Financial Officer	C-Suite Officer	873 Value: $153.2K
Mar 11, 2026 Sell	Common Stock F-InKind	Young Micah W EVP & Chief Financial Officer	C-Suite Officer	471 Value: $82.6K
Mar 11, 2026 Buy	Common Stock M-Exempt	Young Micah W EVP & Chief Financial Officer	C-Suite Officer	873 Value: $153.2K
Mar 11, 2026 Buy	Restricted Stock Units M-Exempt	Szyman Catherine M. CEO	CEO / President	2 101 Value: $368.7K
Mar 11, 2026 Sell	Common Stock F-InKind	Szyman Catherine M. CEO	CEO / President	1 069 Value: $187.6K
Mar 11, 2026 Buy	Common Stock M-Exempt	Szyman Catherine M. CEO	CEO / President	2 101 Value: $368.7K
Mar 11, 2026 Buy	Forward Sale Contract (obligation to sell) J-Other	Politan Capital Management Lp Director By Deputization	Director	142 681 Value: $25.0M
Mar 06, 2026 Buy	Restricted Stock Units A-Award	Meehan Greg Allen Chief Commerical Officer	Officer	8 550 Value: $1.50M
Mar 06, 2026 Buy	Restricted Stock Units A-Award	Benner Tim Chief Marketing Officer	Officer	6 128 Value: $1.07M
Mar 06, 2026 Buy	Restricted Stock Units A-Award	Hellmann Elisabeth A Chief Human Resources Officer	Officer	5 985 Value: $1.05M
Mar 06, 2026 Buy	Restricted Stock Units A-Award	Sampath Anand EVP, Operations	Officer	6 840 Value: $1.20M
Mar 06, 2026 Buy	Restricted Stock Units A-Award	Dadswell Charles EVP, General Counsel	Officer	10 261 Value: $1.80M

About Insider Power

Insider Power is a proprietary algorithm developed by StockInvest.us to evaluate the significance of insider transactions. The calculation considers the size, type, and timing of transactions, as well as the insider’s role within the company.

It is important to note that, in general, there is little to no correlation between insider transactions and short-term stock price movements. In one of our studies, only 0.22%^* of stocks with insider activity showed a measurable correlation — and even then, it was unclear whether the effect was caused by insider actions or simply by the stock’s broader trend.

While our algorithms are designed to highlight potentially meaningful signals, these cannot be regarded as statistically significant on their own. Insider trading activity should therefore be seen as informative rather than as direct trading guidance. The Insider Power metric was created to present this information in a clearer and more accessible way, helping investors better understand the possible context of insider activity.

* October 6th, 2025 - Tested on 5562 stocks

ABOUT MASIMO CORPORATION

Masimo Corporation develops, manufactures, and markets noninvasive monitoring technologies and hospital automation solutions worldwide. The company offers masimo signal extraction technology (SET) pulse oximetry with measure-through motion and low perfusion pulse oximetry monitoring to address the primary limitations of conventional pulse oximetry. It also provides Masimo rainbow SET platform that includes rainbow SET Pulse CO-Oximetry products t...

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