MASIMO CORP
MASI · Electromedical & Electrotherapeutic Apparatus · 52.4M shares · -1%/yr ↓ buyback · EDGAR filings ↗
Reference price $136.56 · est. market cap ~$7.2B — last insider sale, 2026-01-28 (estimated from the dated SEC Form 4 price × shares outstanding — not a live quote)
Grade
B70Masimo — pulse-oximetry medtech with a strong core masked by consumer-audio losses.
Strengths
- Healthcare operating margin 20% (96th pct), strong FCF (96th)
- Durable, IP-rich monitoring franchise
Risks
- Net loss from Sound United (consumer-audio) writedown/exit
- Apple patent litigation; governance turnover
Notable findings
- Exec changeRecent 8-K item 5.02 8-K ↗
- Net lossNet loss (net margin -9.9%)
- Strong balance sheetStrong balance sheet — $152M cash & investments
- Pending merger• We may not complete the proposed Merger within the timeframe we anticipate or at all, which could have an adverse effect on our business, financial results and/or operations
- Insider sellingInsider selling — 3 open-market sale(s) by 1 insider(s) (~$3M, last 6mo) Form 4 ↗
Quarterly revenue
Last 4 quarters · from SEC filings.
Key metrics
Gross margin
61.9%
Operating margin
20.3%
Net margin
-9.9%
Return on equity
-21.0%
Return on assets
-8.9%
ROIC
19.7%
Revenue growth (QoQ)
8.6%
Debt / equity
0.7×
Net debt / EBITDA
1.1×
Current ratio
2.5×
Free cash flow
$198M
EBITDA
$349M
Tangible book value
$568M
Cash & investments
$152M
Stock comp / revenue
2.3%
Insider transactions · last 18 months
| Date | Insider | Type | Shares | Price |
|---|---|---|---|---|
| 2026-06-10 | Solomon Darlene J. S. | Disposition | 3.0K | $180.00 |
| 2026-06-10 | Scannell Timothy J | Disposition | 2.6K | $180.00 |
| 2026-06-10 | LANE WENDY E | Disposition | 2.6K | $180.00 |
| 2026-06-10 | Politan Capital Management LP | Disposition | 4.6M | $180.00 |
| 2026-06-10 | Brennan Michelle | Disposition | 9.3K | $180.00 |
| 2026-06-10 | Hataishi Paul | Disposition | 13K | $180.00 |
| 2026-06-10 | Sampath Anand | Disposition | 34K | $180.00 |
| 2026-06-10 | Hellmann Elisabeth A | Disposition | 214 | $180.00 |
| 2026-06-10 | Young Micah W | Disposition | 26K | $180.00 |
| 2026-06-10 | Szyman Catherine M. | Disposition | 7.6K | $180.00 |
| 2026-04-29 | LANE WENDY E | Option exercise | 1.2K | — |
| 2026-04-29 | Scannell Timothy J | Option exercise | 1.2K | — |
| 2026-04-29 | Brennan Michelle | Option exercise | 1.2K | — |
| 2026-04-21 | Hellmann Elisabeth A | Option exercise | 335 | — |
| 2026-04-21 | Hellmann Elisabeth A | Tax withheld | 121 | $178.43 |
| 2026-03-11 | Szyman Catherine M. | Tax withheld | 1.1K | $175.47 |
| 2026-03-11 | Szyman Catherine M. | Option exercise | 2.1K | — |
| 2026-03-11 | Young Micah W | Option exercise | 873 | — |
| 2026-03-11 | Young Micah W | Tax withheld | 471 | $175.47 |
| 2026-02-27 | Young Micah W | Grant | 15K | — |
| 2026-02-27 | Young Micah W | Tax withheld | 8.1K | $175.35 |
| 2026-02-26 | Young Micah W | Grant | 2.0K | — |
| 2026-02-26 | Young Micah W | Tax withheld | 1.1K | $175.22 |
| 2026-02-12 | Szyman Catherine M. | Tax withheld | 4.6K | — |
| 2026-02-12 | Szyman Catherine M. | Option exercise | 11K | $132.96 |
| 2026-01-28 | Sampath Anand | Sell | 6.6K | $137.22 |
| 2026-01-28 | Sampath Anand | Option exercise | 30K | $37.84 |
| 2026-01-28 | Sampath Anand | Sell | 12K | $136.56 |
| 2026-01-28 | Sampath Anand | Sell | 196 | $138.09 |
| 2025-11-13 | Ahmed Omar | Option exercise | 2.5K | $152.43 |
| 2025-11-13 | Ahmed Omar | Tax withheld | 974 | — |
| 2025-09-23 | Tripodi Blair | Option exercise | 15K | $142.13 |
| 2025-09-23 | Tripodi Blair | Tax withheld | 8.1K | — |
| 2025-08-29 | Politan Capital Management LP | Other | 127K | — |
| 2025-08-13 | Brennan Michelle | Buy | 100 | $155.25 |
| 2025-08-12 | Brennan Michelle | Buy | 100 | $150.35 |
| 2025-08-11 | Jellison William R | Buy | 3.0K | $145.98 |
| 2025-07-01 | MASIMO CORP | Sell | 290K | $2.25 |
| 2025-07-01 | MASIMO CORP | Sell | 532K | $2.25 |
| 2025-07-01 | MASIMO CORP | Conversion | 290K | $0.00 |
| 2025-05-12 | Muhsin Bilal | Sell | 525 | $164.96 |
| 2025-05-12 | Muhsin Bilal | Option exercise | 10K | $34.51 |
| 2025-05-12 | Muhsin Bilal | Sell | 3.9K | $162.72 |
| 2025-05-12 | Muhsin Bilal | Sell | 5.6K | $163.51 |
| 2025-04-29 | Jellison William R | Grant | 1.8K | — |
| 2025-04-29 | Politan Capital Management LP | Option exercise | 1.8K | — |
| 2025-04-29 | Brennan Michelle | Option exercise | 1.8K | — |
| 2025-04-29 | REYNOLDS CRAIG B | Option exercise | 1.8K | — |
| 2025-04-29 | Chapek Robert A | Option exercise | 1.8K | — |
| 2025-04-29 | Solomon Darlene J. S. | Option exercise | 1.8K | — |
| 2025-04-29 | Scannell Timothy J | Option exercise | 1.4K | — |
| 2025-04-29 | LANE WENDY E | Option exercise | 1.4K | — |
| 2025-03-14 | REYNOLDS CRAIG B | Sell | 2.1K | $166.13 |
| 2025-03-10 | Muhsin Bilal | Sell | 10K | $166.03 |
| 2025-03-10 | Muhsin Bilal | Sell | 1.4K | $166.71 |
| 2025-03-10 | Muhsin Bilal | Sell | 1.7K | $167.97 |
| 2025-03-10 | Muhsin Bilal | Sell | 1.8K | $169.37 |
| 2025-03-10 | Muhsin Bilal | Sell | 7.0K | $170.86 |
| 2025-03-10 | Muhsin Bilal | Sell | 1.7K | $171.76 |
| 2025-03-10 | Muhsin Bilal | Sell | 3.9K | $165.18 |
| 2025-03-10 | Muhsin Bilal | Option exercise | 30K | $37.84 |
| 2025-03-10 | Muhsin Bilal | Sell | 2.4K | $163.28 |
| 2025-03-01 | Muhsin Bilal | Tax withheld | 8.1K | $188.77 |
| 2025-03-01 | Young Micah W | Option exercise | 15K | — |
| 2025-03-01 | Young Micah W | Tax withheld | 8.1K | $188.77 |
| 2025-03-01 | Tripodi Blair | Option exercise | 15K | — |
| 2025-03-01 | Tripodi Blair | Tax withheld | 8.1K | $188.77 |
| 2025-03-01 | Muhsin Bilal | Option exercise | 15K | — |
| 2025-02-12 | Brennan Michelle | Grant | 8.9K | — |
| 2025-02-12 | Brennan Michelle | Tax withheld | 4.8K | $179.51 |
| 2025-01-15 | Chapek Robert A | Option exercise | 1.7K | — |
All non-derivative Form 4 activity (SEC), newest first.
Supply chain
Customers (6)
- GE Healthcare
- Hillrom
- Mindray
- Philips
- Physio-Control
- Zoll
Suppliers (1)
- Willow Laboratories, Inc.
Named in the 10-K; linked when we track them.
Notable events (8-K)
| Date | Items | |
|---|---|---|
| 2026-06-10 | 1.02Acquisition/dispositionDelisting notice3.035.01Exec/director change5.03Exhibits | filing ↗ |
| 2026-05-04 | Shareholder voteReg FDExhibits | filing ↗ |
| 2026-04-23 | Other | filing ↗ |
| 2026-02-17 | Material agreementReg FDExhibits | filing ↗ |
| 2026-01-12 | ResultsReg FDExhibits | filing ↗ |
| 2025-12-03 | Reg FDExhibits | filing ↗ |
| 2025-12-01 | Material agreement1.02Debt obligationExhibits | filing ↗ |
| 2025-11-04 | ResultsReg FDExhibits | filing ↗ |
Recent filings
| Form | Filed | Period | Accession |
|---|---|---|---|
| 8-K | 2026-06-10 | 2026-06-10 | 0001104659-26-072151 ↗ |
| 10-Q | 2026-05-05 | 2026-04-04 | 0000937556-26-000063 ↗ |
| 8-K | 2026-05-04 | 2026-05-01 | 0001104659-26-054512 ↗ |
| 10-K/A | 2026-05-01 | 2026-01-03 | 0001104659-26-054180 ↗ |
| 8-K | 2026-04-23 | 2026-04-23 | 0001104659-26-047839 ↗ |
| 10-K | 2026-02-27 | 2026-01-03 | 0000937556-26-000017 ↗ |
| 8-K | 2026-02-17 | 2026-02-16 | 0001104659-26-015904 ↗ |
| 8-K | 2026-01-12 | 2026-01-12 | 0000937556-26-000005 ↗ |
| 8-K | 2025-12-03 | 2025-12-03 | 0000937556-25-000175 ↗ |
| 8-K | 2025-12-01 | 2025-12-01 | 0000937556-25-000171 ↗ |
| 10-Q | 2025-11-04 | 2025-09-27 | 0000937556-25-000161 ↗ |
| 8-K | 2025-11-04 | 2025-11-04 | 0000937556-25-000160 ↗ |