Masimo Corp
MASIDelisted Jun 10, 2026- Industry
- Electromedical & Electrotherapeutic Apparatus
- SEC CIK
- 0000937556
Masimo Corp was delisted on Jun 10, 2026; its insiders filed their last Form 4 on Jun 12, 2026; 451 institutions reported holding it in 13F filings for Q1 2026, worth $9.69B in total; Soros Fund Management was the only superinvestor holding it.
13F holders, Q1 2026
Institutional positions in Masimo Corp as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
MASI is no longer listed, so this page shows Q1 2026. 13F filings for later quarters list far fewer holders.
- Institutional holders
- 451
- +65 vs. Q4 2025
- Shares held
- 54.6M
- +4.00M (+7.9%) vs. Q4 2025
- Total value
- $9.69B
- +$3.10B (+47.2%) vs. Q4 2025
- New holders
- 136
- 140 more added
- Sold out
- 71
- 107 more reduced
6 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MASI on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 2 | $16.2K |
| Q1 2026 | 451 | $9.69B |
| Q4 2025 | 392 | $7.20B |
| Q3 2025 | 358 | $8.29B |
| Q2 2025 | 379 | $9.68B |
| Q1 2025 | 393 | $9.02B |
| Q4 2024 | 366 | $8.50B |
| Q3 2024 | 362 | $6.72B |
| Q2 2024 | 352 | $6.24B |
| Q1 2024 | 339 | $7.59B |
| Q4 2023 | 342 | $5.91B |
| Q3 2023 | 357 | $4.18B |
| Q2 2023 | 415 | $7.56B |
| Q1 2023 | 428 | $8.30B |
| Q4 2022 | 405 | $6.58B |
| Q3 2022 | 418 | $6.54B |
| Q2 2022 | 417 | $5.81B |
| Q1 2022 | 457 | $6.61B |
| Q4 2021 | 520 | $13.6B |
| Q3 2021 | 475 | $12.5B |
| Q2 2021 | 459 | $11.1B |
| Q1 2021 | 481 | $10.3B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| GWM Advisors LLC | 1,827 | $325.0K | 0.00% | +1,715+1,531.3% | Added |
| Pinnacle Associates Ltd | 1,824 | $324.4K | 0.00% | +157+9.4% | Added |
| Chicago Partners Investment Group LLC | 1,802 | $321.7K | 0.01% | +6+0.3% | Added |
| Everence Capital Management Inc | 1,773 | $315.0K | 0.02% | +1,773 | New |
| CAPROCK Group, Inc. | 1,761 | $313.3K | 0.01% | +1,761 | New |
| Hantz Financial Services, Inc. | 1,762 | $313.0K | 0.00% | +1,107+169.0% | Added |
| Silver Oak Securities, Inc | 1,755 | $312.2K | 0.02% | −200−10.2% | Reduced |
| Wesleyan Assurance Society | 1,750 | $311.0K | 0.02% | −800−31.4% | Reduced |
| Inscription Capital, LLC | 1,713 | $304.7K | 0.03% | +143+9.1% | Added |
| Evolve Private Wealth, LLC | 1,713 | $304.7K | 0.02% | +1,713 | New |
| Sanctuary Advisors, LLC | 1,689 | $300.4K | 0.00% | +17+1.0% | Added |
| CIBC Asset Management Inc | 1,669 | $296.9K | 0.00% | 00.0% | Unchanged |
| Armistice Capital, LLC | 1,642 | $292.1K | 0.01% | +1,642 | New |
| TownSquare Capital, LLC | 1,638 | $291.4K | 0.07% | −806−33.0% | Reduced |
| M&G Plc | 1,623 | $288.9K | 0.00% | 00.0% | Unchanged |
| Fifth Third Wealth Advisors LLC | 1,528 | $271.8K | 0.01% | +1,528 | New |
| Caerus Investment Advisors, LLC | 1,526 | $271.4K | 0.11% | +1,526 | New |
| MML Investors Services, LLC | 1,524 | $271.1K | 0.00% | +1,524 | New |
| Calamos Advisors LLC | 1,511 | $268.8K | 0.00% | +1,511 | New |
| Calamos Wealth Management LLC | 1,511 | $268.8K | 0.01% | +1,511 | New |
| Shelton Capital Management | 1,478 | $262.9K | 0.01% | −114−7.2% | Reduced |
| Andina Capital Management, LLC | 1,420 | $252.6K | 0.22% | +1,420 | New |
| Warren Averett Asset Management, LLC | 1,415 | $251.7K | 0.00% | +1,415 | New |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 1,410 | $250.8K | 0.01% | −2,387−62.9% | Reduced |
| Guggenheim Capital LLC | 1,407 | $250.3K | 0.00% | +1,407 | New |
| Empowered Funds, LLC | 1,376 | $244.7K | 0.00% | +1,376 | New |
| Corient IA LLC | 1,340 | $238.3K | 0.22% | +1,340 | New |
| Wick Capital Partners, LLC | 1,326 | $235.9K | 0.04% | +1,326 | New |
| Pinnacle Wealth Management Advisory Group, LLC | 1,324 | $235.5K | 0.02% | +1,324 | New |
| Ground Swell Capital, LLC | 1,319 | $234.6K | 0.46% | +1,319 | New |
| North Dakota State Investment Board | 1,318 | $234.4K | 0.01% | −284−17.7% | Reduced |
| GenTrust, LLC | 1,304 | $231.9K | 0.01% | +1,304 | New |
| Parcion Private Wealth LLC | 1,291 | $229.6K | 0.01% | +1,291 | New |
| R Squared Ltd | 1,289 | $229.3K | 0.13% | +1,289 | New |
| United Capital Financial Advisers, LLC | 1,281 | $227.9K | 0.00% | +1,281 | New |
| FORA Capital, LLC | 1,280 | $227.7K | 0.02% | −3,894−75.3% | Reduced |
| Worldquant Millennium Advisors LLC | 1,270 | $225.9K | 0.00% | −17,288−93.2% | Reduced |
| KBC Group NV | 1,258 | $224.0K | 0.00% | 00.0% | Unchanged |
| Keel Point, LLC | 1,228 | $218.4K | 0.01% | +1,228 | New |
| Oak Thistle LLC | 1,217 | $216.5K | 0.02% | +1,217 | New |
| Jane Street Group, LLC | 1,215 | $216.1K | 0.00% | −101,666−98.8% | Reduced |
| Essential Partners LLC | 1,183 | $210.4K | 0.07% | +296+33.4% | Added |
| Ballentine Partners, LLC | 1,177 | $209.4K | 0.00% | +1,177 | New |
| Net Worth Advisory Group | 1,177 | $209.3K | 0.04% | +1,177 | New |
| Frec Markets, Inc. | 1,143 | $203.3K | 0.03% | +1,143 | New |
| Whittier Trust Co | 1,134 | $202.4K | 0.00% | 00.0% | Unchanged |
| Knollwood Investment Advisory, LLC | 1,137 | $202.2K | 0.02% | +1,137 | New |
| Walleye Trading LLC | 1,100 | $195.7K | 0.00% | +1,100 | New |
| SRS Capital Advisors, Inc. | 1,076 | $191.4K | 0.01% | +998+1,279.5% | Added |
| EverSource Wealth Advisors, LLC | 1,064 | $189.3K | 0.01% | +88+9.0% | Added |
| MAI Capital Management | 913 | $162.4K | 0.00% | +774+556.8% | Added |
| Eurizon Capital SGR S.p.A. | 845 | $150.6K | 0.00% | +61+7.8% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 782 | $139.1K | 0.00% | −231,783−99.7% | Reduced |
| IFP Advisors, Inc | 717 | $127.5K | 0.00% | +208+40.9% | Added |
| Parallel Advisors, LLC | 624 | $111.0K | 0.00% | +340+119.7% | Added |
| Rothschild Investment LLC | 606 | $107.8K | 0.01% | +345+132.2% | Added |
| GAMMA Investing LLC | 586 | $104.2K | 0.00% | +303+107.1% | Added |
| Bayforest Capital Ltd | 521 | $92.7K | 0.10% | +57+12.3% | Added |
| Root Financial Partners, LLC | 457 | $81.3K | 0.00% | +451+7,516.7% | Added |
| Umb Bank N A | 444 | $79.0K | 0.00% | −21−4.5% | Reduced |
| Longfellow Investment Management Co LLC | 429 | $76.3K | 0.02% | +429 | New |
| DHJJ Financial Advisors, Ltd. | 360 | $64.0K | 0.02% | 00.0% | Unchanged |
| Smartleaf Asset Management LLC | 356 | $63.1K | 0.00% | +42+13.4% | Added |
| Signaturefd, LLC | 346 | $61.5K | 0.00% | −62−15.2% | Reduced |
| Sterling Capital Management LLC | 322 | $57.3K | 0.00% | −10,563−97.0% | Reduced |
| Advisor Group Holdings, Inc. | 317 | $56.5K | 0.00% | −160−33.5% | Reduced |
| Advisory Services Network, LLC | 278 | $49.4K | 0.00% | +278 | New |
| Aster Capital Management (DIFC) Ltd | 293 | $48.8K | 0.02% | +77+35.6% | Added |
| SBI Securities Co., Ltd. | 270 | $48.0K | 0.00% | +4+1.5% | Added |
| Wealth Preservation Advisors, LLC | 248 | $44.1K | 0.04% | +248 | New |
| Ronald Blue Trust, Inc. | 232 | $41.3K | 0.00% | −74−24.2% | Reduced |
| Los Angeles Capital Management LLC | 220 | $39.1K | 0.00% | 00.0% | Unchanged |
| Massmutual Trust Co FSB | 220 | $39.1K | 0.00% | −3−1.3% | Reduced |
| Hilltop National Bank | 218 | $38.8K | 0.01% | 00.0% | Unchanged |
| True Wealth Design, LLC | 172 | $30.6K | 0.01% | +88+104.8% | Added |
| SJS Investment Consulting Inc. | 162 | $28.8K | 0.00% | −14−8.0% | Reduced |
| Activest Wealth Management | 158 | $28.1K | 0.00% | −29−15.5% | Reduced |
| JPL Wealth Management, LLC | 156 | $27.7K | 0.01% | +156 | New |
| NBC Securities, Inc. | 146 | $26.0K | 0.00% | −50−25.5% | Reduced |
| Nomura Asset Management Co Ltd | 120 | $21.3K | 0.00% | 00.0% | Unchanged |
| Strive Financial Group ,LLC | 120 | $21.0K | 0.01% | 00.0% | Unchanged |
| Harbor Investment Advisory, LLC | 100 | $17.8K | 0.00% | −524−84.0% | Reduced |
| Fourth Dimension Wealth, LLC | 100 | $17.8K | 0.01% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 88 | $15.7K | 0.00% | +53+151.4% | Added |
| Bell Investment Advisors, Inc | 81 | $14.4K | 0.00% | +60+285.7% | Added |
| Central Trust Co | 79 | $14.1K | 0.00% | 00.0% | Unchanged |
| Boreal Capital Management LLC | 75 | $13.3K | 0.01% | 00.0% | Unchanged |
| Holos Integrated Wealth LLC | 68 | $12.2K | 0.01% | 00.0% | Unchanged |
| Smithfield Trust Co | 65 | $11.0K | 0.00% | 00.0% | Unchanged |
| Northwestern Mutual Wealth Management Co | 52 | $9.25K | 0.00% | −2−3.7% | Reduced |
| Investors Research Corp | 50 | $8.89K | 0.00% | 00.0% | Unchanged |
| Clean Yield Group | 49 | $8.72K | 0.00% | 00.0% | Unchanged |
| Torren Management, LLC | 46 | $8.18K | 0.00% | −223−82.9% | Reduced |
| Covestor Ltd | 45 | $8.00K | 0.01% | −36−44.4% | Reduced |
| Quarry LP | 44 | $7.83K | 0.00% | +3+7.3% | Added |
| Farmers & Merchants Investments Inc | 42 | $7.47K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 41 | $7.29K | 0.00% | +11+36.7% | Added |
| Spire Wealth Management | 39 | $6.94K | 0.00% | 00.0% | Unchanged |
| Basecamp Wealth Advisors LLC | 38 | $6.76K | 0.00% | −24−38.7% | Reduced |
| Quent Capital, LLC | 37 | $6.58K | 0.00% | +2+5.7% | Added |