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, Q3 2025
Institutional positions in Masimo Corp as of Sep 30, 2025. 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
- Institutional holders
- 358
- −17 vs. Q2 2025
- Shares held
- 56.2M
- −1.27M (−2.2%) vs. Q2 2025
- Total value
- $8.29B
- −$1.38B (−14.3%) vs. Q2 2025
- New holders
- 46
- 120 more added
- Sold out
- 63
- 121 more reduced
4 institutions that held it in Q2 2025 haven't filed for Q3 2025 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 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, Q3 2025
Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q2 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Swiss National Bank | 89,300 | $13.2M | 0.01% | +1,600+1.8% | Added |
| Walleye Capital LLC | 89,363 | $13.2M | 0.11% | +46,131+106.7% | Added |
| Bellevue Group AG | 96,968 | $14.3M | 0.30% | +7,295+8.1% | Added |
| Falcon Edge Capital, LP | 97,102 | $14.3M | 1.45% | −4,966−4.9% | Reduced |
| Principal Financial Group Inc | 102,184 | $15.1M | 0.01% | −283−0.3% | Reduced |
| Legal & General Group Plc | 102,677 | $15.1M | 0.00% | −1,687−1.6% | Reduced |
| TD Asset Management Inc | 107,858 | $15.9M | 0.01% | −59,318−35.5% | Reduced |
| JPMorgan Chase & Co | 107,941 | $15.9M | 0.00% | −30,149−21.8% | Reduced |
| DF Dent & Co Inc | 108,653 | $16.0M | 0.21% | +108,653 | New |
| UBS Asset Management Americas Inc | 109,110 | $16.1M | 0.00% | −100,453−47.9% | Reduced |
| Cramer Rosenthal McGlynn LLC | 114,605 | $16.9M | 1.09% | +19,666+20.7% | Added |
| Citigroup Inc | 116,672 | $17.2M | 0.01% | +66,710+133.5% | Added |
| GW&K Investment Management, LLC | 124,047 | $18.3M | 0.16% | +123,912+91,786.7% | Added |
| Rhumbline Advisers | 126,608 | $18.7M | 0.02% | −888−0.7% | Reduced |
| Royal Bank of Canada | 127,117 | $18.8M | 0.00% | +17,427+15.9% | Added |
| Gotham Asset Management, LLC | 129,026 | $19.0M | 0.08% | −36,330−22.0% | Reduced |
| Toroso Investments, LLC | 132,557 | $19.6M | 0.08% | +26,359+24.8% | Added |
| Marshall Wace, LLP | 134,122 | $19.8M | 0.02% | +126,914+1,760.7% | Added |
| Rockefeller Capital Management L.P. | 147,428 | $21.8M | 0.04% | +31,802+27.5% | Added |
| Adage Capital Partners GP, L.L.C. | 150,000 | $22.1M | 0.04% | +150,000 | New |
| Erste Asset Management GmbH | 160,000 | $22.9M | 0.22% | +68,000+73.9% | Added |
| BNP PARIBAS ASSET MANAGEMENT Holding S.A. | 164,926 | $24.3M | 0.06% | +99,105+150.6% | Added |
| American Century Companies Inc | 168,341 | $24.8M | 0.01% | +16,113+10.6% | Added |
| UBS Group AG | 169,800 | $25.1M | 0.00% | +27,636+19.4% | Added |
| Raymond James Financial Inc | 196,021 | $28.9M | 0.01% | −4,208−2.1% | Reduced |
| Nuveen, LLC | 225,712 | $33.3M | 0.01% | +76,054+50.8% | Added |
| Comerica Bank | 233,427 | $34.4M | 0.13% | +43,605+23.0% | Added |
| Grantham, Mayo, Van Otterloo & Co. LLC | 242,822 | $35.8M | 0.10% | +2,259+0.9% | Added |
| Dimensional Fund Advisors LP | 259,668 | $38.3M | 0.01% | −263,558−50.4% | Reduced |
| Bank of New York Mellon Corp | 312,618 | $46.1M | 0.01% | −4,975−1.6% | Reduced |
| Invesco Ltd. | 321,363 | $47.4M | 0.01% | +84,060+35.4% | Added |
| Schroder Investment Management Group | 336,650 | $48.1M | 0.04% | −111,851−24.9% | Reduced |
| CI Private Wealth, LLC | 336,215 | $49.6M | 0.08% | +5,801+1.8% | Added |
| Charles Schwab Investment Management Inc | 364,457 | $53.8M | 0.01% | −6,277−1.7% | Reduced |
| Bamco Inc | 388,747 | $57.4M | 0.15% | +4,158+1.1% | Added |
| Northern Trust Corp | 392,142 | $57.9M | 0.01% | +3,600+0.9% | Added |
| Sumitomo Mitsui Trust Holdings, Inc. | 397,248 | $58.6M | 0.03% | −73,793−15.7% | Reduced |
| Bank of America Corp | 405,061 | $59.8M | 0.00% | +214,885+113.0% | Added |
| Ameriprise Financial Inc | 460,951 | $68.0M | 0.02% | +66,464+16.8% | Added |
| Price T Rowe Associates Inc | 514,946 | $76.0M | 0.01% | +109,486+27.0% | Added |
| Durable Capital Partners LP | 620,619 | $91.6M | 0.68% | −543,279−46.7% | Reduced |
| Squarepoint Ops LLC | 620,932 | $91.6M | 0.19% | +546,905+738.8% | Added |
| Liontrust Investment Partners LLP | 681,895 | $100.6M | 1.47% | −26,405−3.7% | Reduced |
| RTW Investments, LP | 683,294 | $100.8M | 1.24% | 00.0% | Unchanged |
| Morgan Stanley | 690,601 | $101.9M | 0.01% | −76,774−10.0% | Reduced |
| Goldman Sachs Group Inc | 744,402 | $109.8M | 0.02% | +272,877+57.9% | Added |
| Geode Capital Management, LLC | 942,439 | $139.1M | 0.01% | +46,021+5.1% | Added |
| Viking Global Investors LPSuperinvestorViking Global Investors | 1,073,433 | $158.4M | 0.41% | +306,007+39.9% | Added |
| Alyeska Investment Group, L.P. | 1,381,085 | $203.8M | 0.62% | +246,595+21.7% | Added |
| Westfield Capital Management Co LP | 1,419,250 | $209.4M | 0.88% | +238,047+20.2% | Added |
| State Street Corp | 1,484,471 | $219.0M | 0.01% | −1,923−0.1% | Reduced |
| Capital Research Global Investors | 1,854,128 | $273.6M | 0.05% | −1,542−0.1% | Reduced |
| T. Rowe Price Investment Management, Inc. | 2,126,763 | $313.8M | 0.19% | −373,381−14.9% | Reduced |
| Massachusetts Financial Services Co | 2,619,960 | $386.6M | 0.12% | +149,567+6.1% | Added |
| Politan Capital Management LP | 4,589,648 | $677.2M | 61.54% | −126,888−2.7% | Reduced |
| Vanguard Group Inc | 4,810,011 | $709.7M | 0.01% | +171,876+3.7% | Added |
| FMR LLC | 8,213,721 | $1.21B | 0.06% | +32,349+0.4% | Added |
| BlackRock, Inc. | 10,361,091 | $1.53B | 0.03% | −146,235−1.4% | Reduced |
| Holocene Advisors, LP | 0 | $0 | 0.00% | −1,243,607−100.0% | Sold out |
| Woodline Partners LP | 0 | $0 | 0.00% | −182,709−100.0% | Sold out |
| Hawk Ridge Capital Management LP | 0 | $0 | 0.00% | −148,685−100.0% | Sold out |
| PFM Health Sciences, LP | 0 | $0 | 0.00% | −94,451−100.0% | Sold out |
| Point72 (DIFC) Ltd | 0 | $0 | 0.00% | −68,700−100.0% | Sold out |
| FIL Ltd | 0 | $0 | 0.00% | −56,326−100.0% | Sold out |
| Bank of Nova Scotia | 0 | $0 | 0.00% | −53,108−100.0% | Sold out |
| Cinctive Capital Management LP | 0 | $0 | 0.00% | −46,787−100.0% | Sold out |
| Natixis | 0 | $0 | 0.00% | −45,648−100.0% | Sold out |
| 4D Advisors, LLC | 0 | $0 | 0.00% | −45,000−100.0% | Sold out |
| Renaissance Technologies LLC | 0 | $0 | 0.00% | −25,377−100.0% | Sold out |
| Point72 Asset Management, L.P. | 0 | $0 | 0.00% | −24,219−100.0% | Sold out |
| Allspring Global Investments Holdings, LLC | 0 | $0 | 0.00% | −20,897−100.0% | Sold out |
| Two Sigma Investments, LP | 0 | $0 | 0.00% | −15,465−100.0% | Sold out |
| Fred Alger Management, LLC | 0 | $0 | 0.00% | −12,185−100.0% | Sold out |
| XTX Topco Ltd | 0 | $0 | 0.00% | −10,837−100.0% | Sold out |
| Calamos Advisors LLC | 0 | $0 | 0.00% | −5,617−100.0% | Sold out |
| Winton Group Ltd | 0 | $0 | 0.00% | −5,617−100.0% | Sold out |
| Brinker Capital Investments, LLC | 0 | $0 | 0.00% | −4,871−100.0% | Sold out |
| RFG Advisory, LLC | 0 | $0 | 0.00% | −3,887−100.0% | Sold out |
| Algert Global LLC | 0 | $0 | 0.00% | −3,570−100.0% | Sold out |
| Bridgefront Capital, LLC | 0 | $0 | 0.00% | −3,564−100.0% | Sold out |
| Northwest & Ethical Investments L.P. | 0 | $0 | 0.00% | −2,100−100.0% | Sold out |
| Atria Investments LLC | 0 | $0 | 0.00% | −1,928−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −1,872−100.0% | Sold out |
| North Star Asset Management Inc | 0 | $0 | 0.00% | −1,860−100.0% | Sold out |
| RSM US Wealth Management LLC | 0 | $0 | 0.00% | −1,835−100.0% | Sold out |
| Prelude Capital Management, LLC | 0 | $0 | 0.00% | −1,720−100.0% | Sold out |
| Janney Montgomery Scott LLC | 0 | $0 | 0.00% | −1,681−100.0% | Sold out |
| Qsemble Capital Management, LP | 0 | $0 | 0.00% | −1,525−100.0% | Sold out |
| Mercer Global Advisors Inc | 0 | $0 | 0.00% | −1,472−100.0% | Sold out |
| Kera Capital Partners, Inc. | 0 | $0 | 0.00% | −1,380−100.0% | Sold out |
| Keel Point, LLC | 0 | $0 | 0.00% | −1,336−100.0% | Sold out |
| Pitcairn Co | 0 | $0 | 0.00% | −1,320−100.0% | Sold out |
| Zacks Investment Management | 0 | $0 | 0.00% | −1,290−100.0% | Sold out |
| Vontobel Holding Ltd. | 0 | $0 | 0.00% | −1,282−100.0% | Sold out |
| Forum Financial Management, LP | 0 | $0 | 0.00% | −1,266−100.0% | Sold out |
| Ballentine Partners, LLC | 0 | $0 | 0.00% | −1,255−100.0% | Sold out |
| Greenleaf Trust | 0 | $0 | 0.00% | −1,217−100.0% | Sold out |
| Knollwood Investment Advisory, LLC | 0 | $0 | 0.00% | −1,200−100.0% | Sold out |
| HB Wealth Management, LLC | 0 | $0 | 0.00% | −1,193−100.0% | Sold out |
| United Community Bank | 0 | $0 | 0.00% | −946−100.0% | Sold out |