How many insider trades does FilingIQ track for MASI?

FilingIQ tracks 955 Form 4 insider transactions for MASI (MASIMO CORP), covering filings from Jan 14, 2015 onwards. 32 of those were filed in the last 90 days.

Are MASI insiders net buyers or net sellers?

Across the full Form 4 history for MASI, 20 transactions (2%) were open-market purchases and 355 (37%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.

Where does MASI insider data come from?

Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.

What sector is MASI in?

MASIMO CORP (MASI) is classified in the Healthcare sector, specifically Medical Devices, with a current market capitalisation of $9.43B.

MASI insider trading

NasdaqGS Healthcare

MASIMO CORP — scored insider trade history from SEC Form 4 filings, parsed and contextualised by FilingIQ.

Total Form 4 trades

955

Last 90 days

Buys / sells

2% / 37%

Market cap

$9.43B

About MASIMO CORP

Masimo Corporation develops, manufactures, and markets various patient monitoring technologies, and automation and connectivity 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; Masimo rainbow SET platform, including rainbow SET Pulse CO-Oximetry products that allows noninvasive monitoring of oxygen, carboxyhemoglobin, methemoglobin, hemoglobin, fractional arterial oxygen saturation, pleth variability index, rainbow pleth variability index, respiration rate from the pleth, and oxygen reserve index, as well as acoustic respiration monitoring, NomoLine capnography and gas monitoring, and regional oximetry. It also provides brain function and hemodynamic monitoring solutions; patient position and activity tracking, and neuromodulation technology solutions; and Masimo Hospital Automation platform, including hospital automation solutions, including Patient SafetyNet, SafetyNet, Replica, Iris, MyView, UniView, Uniview: 60, Masimo Sleep, Centroid, and Bridg; and nasal high-flow respiratory support therapy, neuromodulation technology, and telehealth solutions. In addition, the company provides its products through direct sales force, distributors, and original equipment manufacturers partners to hospitals, emergency medical service and home care providers, long-term care facilities, physician offices, veterinarians, and consumers; and home wellness products through e-commerce internet sites, such as masimopersonalhealth.com, amazon.com, and shopify.com. Masimo Corporation was incorporated in 1989 and is headquartered in Irvine, California.

Company website: www.masimo.com

MASI insider activity at a glance

FilingIQ has scored 955 insider transactions for MASI since Jan 14, 2015. The most recent filing in our index is dated Apr 29, 2026.

Across the full history, 20 open-market purchases and 355 open-market sales were filed under transaction codes P and S respectively. Compensatory share awards (code A) and option exercises (code M) are tracked separately and not counted here.

The average FilingIQ composite score on MASI insider trades is 61.7/100, produced by FilingIQ's multi-factor Form 4 model. Model framework documented at methodology.

View live MASI trades on FilingIQ Raw filings on SEC EDGAR

Latest MASI Form 4 filings

Sampath Anand EVP, Ops & Clinical Research

S Jan 28, 2026

Most recent disclosures. Sign up to filter by score, transaction code, or insider role.

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Frequently asked

How many insider trades does FilingIQ track for MASI?: FilingIQ tracks 955 Form 4 insider transactions for MASI (MASIMO CORP), covering filings from Jan 14, 2015 onwards. 32 of those were filed in the last 90 days.
Are MASI insiders net buyers or net sellers?: Across the full Form 4 history for MASI, 20 transactions (2%) were open-market purchases and 355 (37%) were open-market sales. Compensatory awards and option exercises are filtered out of these counts.
Where does MASI insider data come from?: Every transaction shown on this page is sourced directly from SEC EDGAR Form 4 filings. FilingIQ parses the raw XML, normalises insider identity across reporting variations, and scores each trade on its multi-factor composite model.
What sector is MASI in?: MASIMO CORP (MASI) is classified in the Healthcare sector, specifically Medical Devices, with a current market capitalisation of $9.43B.

Methodology & sources

Every MASI insider transaction shown on FilingIQ is parsed directly from a public SEC Form 4 XML filing. Insider identity is normalised across reporting variants (CIK changes, name spellings, related-party indirect holdings). The FilingIQ composite score is documented in full on the team page and algo disclosure. Not investment advice; see disclaimer.