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 |
|---|---|---|---|---|---|
| Clearstead Advisors, LLC | 35 | $6.23K | 0.00% | −1,354−97.5% | Reduced |
| Harbour Investments, Inc. | 31 | $5.51K | 0.00% | +22+244.4% | Added |
| Ancora Advisors, LLC | 29 | $5.16K | 0.00% | 00.0% | Unchanged |
| Versant Capital Management, Inc | 27 | $4.80K | 0.00% | 00.0% | Unchanged |
| Pinnacle Wealth Planning Services, Inc. | 25 | $4.45K | 0.00% | 00.0% | Unchanged |
| Vanguard National Trust Co | 25 | $4.45K | 0.00% | +25 | New |
| Sachetta, LLC | 23 | $4.09K | 0.00% | 00.0% | Unchanged |
| High Note Wealth, LLC | 21 | $3.73K | 0.00% | +12+133.3% | Added |
| WealthCollab, LLC | 20 | $3.56K | 0.00% | 00.0% | Unchanged |
| Ameriflex Group, Inc. | 20 | $3.56K | 0.00% | 00.0% | Unchanged |
| First Horizon Corp | 19 | $3.38K | 0.00% | 00.0% | Unchanged |
| ZRC Wealth Management, LLC | 19 | $3.38K | 0.00% | +13+216.7% | Added |
| Parkside Financial Bank & Trust | 18 | $3.20K | 0.00% | −91−83.5% | Reduced |
| JFS Wealth Advisors, LLC | 17 | $3.02K | 0.00% | −1−5.6% | Reduced |
| Brown Brothers Harriman & Co | 17 | $3.02K | 0.00% | 00.0% | Unchanged |
| Sunrise Financial Services, LLC | 17 | $3.02K | 0.00% | 00.0% | Unchanged |
| Private Wealth Management Group, LLC | 15 | $2.67K | 0.00% | 00.0% | Unchanged |
| Twin Peaks Wealth Advisors, LLC | 15 | $2.67K | 0.00% | +15 | New |
| Westside Investment Management, Inc. | 14 | $2.49K | 0.00% | 00.0% | Unchanged |
| Adirondack Trust Co | 12 | $2.13K | 0.00% | 00.0% | Unchanged |
| Zions Bancorporation, National Association | 11 | $1.96K | 0.00% | +11 | New |
| Addison Advisors LLC | 11 | $1.96K | 0.00% | +11 | New |
| SHP Wealth Management | 11 | $1.96K | 0.00% | +9+450.0% | Added |
| Keating Financial Advisory Services, Inc. | 10 | $1.78K | 0.00% | +10 | New |
| First Pacific Financial | 9 | $1.60K | 0.00% | +9 | New |
| NBT Bank N A | 8 | $1.42K | 0.00% | +8 | New |
| Marquette Asset Management, LLC | 8 | $1.42K | 0.00% | +8 | New |
| Valued Wealth Advisors LLC | 7 | $1.25K | 0.00% | +7 | New |
| Hughes Financial Services, LLC | 7 | $1.25K | 0.00% | +1+16.7% | Added |
| Cromwell Holdings LLC | 7 | $1.25K | 0.00% | +3+75.0% | Added |
| Freestone Grove Partners LP | 7 | $1.25K | 0.00% | +7 | New |
| Dunhill Financial, LLC | 6 | $1.10K | 0.00% | +5+500.0% | Added |
| Leonteq Securities AG | 6 | $1.07K | 0.00% | 00.0% | Unchanged |
| Cornerstone Financial Management LLC | 6 | $1.07K | 0.00% | 00.0% | Unchanged |
| Horizon Investments, LLC | 6 | $1.07K | 0.00% | +6 | New |
| DiNuzzo Private Wealth, Inc. | 5 | $890 | 0.00% | 00.0% | Unchanged |
| Creative Financial Designs Inc | 5 | $889 | 0.00% | 00.0% | Unchanged |
| Raleigh Capital Management Inc. | 5 | $889 | 0.00% | +5 | New |
| Prestige Wealth Management Group LLC | 4 | $712 | 0.00% | 00.0% | Unchanged |
| Transamerica Financial Advisors, Inc. | 4 | $711 | 0.00% | +4 | New |
| Bogart Wealth, LLC | 4 | $711 | 0.00% | +4 | New |
| Cornerstone Planning Group LLC | 2 | $358 | 0.00% | 00.0% | Unchanged |
| Larson Financial Group LLC | 2 | $356 | 0.00% | −2−50.0% | Reduced |
| Bare Financial Services, Inc | 2 | $356 | 0.00% | 00.0% | Unchanged |
| MV Capital Management, Inc. | 2 | $356 | 0.00% | +2 | New |
| Comprehensive Financial Planning, Inc. | 2 | $355 | 0.00% | 00.0% | Unchanged |
| DecisionPoint Financial, LLC | 1 | $178 | 0.00% | 00.0% | Unchanged |
| American Capital Advisory, LLC | 1 | $178 | 0.00% | 00.0% | Unchanged |
| Private Trust Co NA | 1 | $178 | 0.00% | 00.0% | Unchanged |
| GHP Investment Advisors, Inc. | 1 | $178 | 0.00% | +1 | New |
| Capital Advisors, Ltd. LLC | 2 | $0 | 0.00% | 00.0% | Unchanged |
| T. Rowe Price Investment Management, Inc. | 0 | $0 | 0.00% | −2,330,158−100.0% | Sold out |
| Naya Capital Management UK Ltd | 0 | $0 | 0.00% | −1,560,697−100.0% | Sold out |
| Alyeska Investment Group, L.P. | 0 | $0 | 0.00% | −1,259,307−100.0% | Sold out |
| RTW Investments, LP | 0 | $0 | 0.00% | −683,294−100.0% | Sold out |
| Viking Global Investors LPSuperinvestorViking Global Investors | 0 | $0 | 0.00% | −514,340−100.0% | Sold out |
| Bamco Inc | 0 | $0 | 0.00% | −373,899−100.0% | Sold out |
| Parkman Healthcare Partners LLC | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| DF Dent & Co Inc | 0 | $0 | 0.00% | −142,626−100.0% | Sold out |
| TD Asset Management Inc | 0 | $0 | 0.00% | −114,514−100.0% | Sold out |
| Falcon Edge Capital, LP | 0 | $0 | 0.00% | −75,552−100.0% | Sold out |
| Swedbank AB | 0 | $0 | 0.00% | −59,500−100.0% | Sold out |
| Assenagon Asset Management S.A. | 0 | $0 | 0.00% | −53,525−100.0% | Sold out |
| Capital Fund Management S.A. | 0 | $0 | 0.00% | −47,586−100.0% | Sold out |
| Sofinnova Investments, Inc. | 0 | $0 | 0.00% | −46,201−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −42,049−100.0% | Sold out |
| Nordea Investment Management AB | 0 | $0 | 0.00% | −28,319−100.0% | Sold out |
| Campbell & CO Investment Adviser LLC | 0 | $0 | 0.00% | −27,783−100.0% | Sold out |
| Logan Capital Management Inc | 0 | $0 | 0.00% | −26,505−100.0% | Sold out |
| Gluskin Sheff & Assoc Inc | 0 | $0 | 0.00% | −25,805−100.0% | Sold out |
| Susquehanna International Group, LLP | 0 | $0 | 0.00% | −16,849−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −16,385−100.0% | Sold out |
| Deerfield Management Company, L.P. (Series C) | 0 | $0 | 0.00% | −16,147−100.0% | Sold out |
| Kayne Anderson Rudnick Investment Management LLC | 0 | $0 | 0.00% | −15,932−100.0% | Sold out |
| Sumitomo Mitsui Trust Holdings, Inc. | 0 | $0 | 0.00% | −14,572−100.0% | Sold out |
| Trexquant Investment LP | 0 | $0 | 0.00% | −13,920−100.0% | Sold out |
| Lecap Asset Management Ltd | 0 | $0 | 0.00% | −13,196−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −12,746−100.0% | Sold out |
| Harbor Capital Advisors, Inc. | 0 | $0 | 0.00% | −9,599−100.0% | Sold out |
| Dynamic Technology Lab Private Ltd | 0 | $0 | 0.00% | −9,480−100.0% | Sold out |
| Birchview Capital, LP | 0 | $0 | 0.00% | −8,280−100.0% | Sold out |
| OP Asset Management Ltd | 0 | $0 | 0.00% | −8,207−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −7,832−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −6,017−100.0% | Sold out |
| Cinctive Capital Management LP | 0 | $0 | 0.00% | −5,681−100.0% | Sold out |
| Malaga Cove Capital, LLC | 0 | $0 | 0.00% | −5,366−100.0% | Sold out |
| Exchange Traded Concepts, LLC | 0 | $0 | 0.00% | −5,101−100.0% | Sold out |
| Laird Norton Trust Company, LLC | 0 | $0 | 0.00% | −4,778−100.0% | Sold out |
| Capstone Investment Advisors, LLC | 0 | $0 | 0.00% | −4,718−100.0% | Sold out |
| Stifel Financial Corp | 0 | $0 | 0.00% | −4,526−100.0% | Sold out |
| NEOS Investment Management LLC | 0 | $0 | 0.00% | −4,342−100.0% | Sold out |
| Tema ETFs LLC | 0 | $0 | 0.00% | −4,342−100.0% | Sold out |
| Gsa Capital Partners LLP | 0 | $0 | 0.00% | −3,682−100.0% | Sold out |
| CenterBook Partners LP | 0 | $0 | 0.00% | −3,148−100.0% | Sold out |
| Farringdon Capital, Ltd. | 0 | $0 | 0.00% | −3,141−100.0% | Sold out |
| Havemeyer Place LP | 0 | $0 | 0.00% | −3,020−100.0% | Sold out |
| State of Wyoming | 0 | $0 | 0.00% | −2,896−100.0% | Sold out |
| 111 Capital | 0 | $0 | 0.00% | −2,871−100.0% | Sold out |
| Ensign Peak Advisors, Inc | 0 | $0 | 0.00% | −2,711−100.0% | Sold out |
| Oppenheimer Asset Management Inc. | 0 | $0 | 0.00% | −2,503−100.0% | Sold out |