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Livermore
ZHEN

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.

Institutional holdersQ3 2025: 358 institutions
Q1 2021: 481 institutionsQ2 2021: 459 institutionsQ3 2021: 475 institutionsQ4 2021: 520 institutionsQ1 2022: 457 institutionsQ2 2022: 417 institutionsQ3 2022: 418 institutionsQ4 2022: 405 institutionsQ1 2023: 428 institutionsQ2 2023: 415 institutionsQ3 2023: 357 institutionsQ4 2023: 342 institutionsQ1 2024: 339 institutionsQ2 2024: 352 institutionsQ3 2024: 362 institutionsQ4 2024: 366 institutionsQ1 2025: 393 institutionsQ2 2025: 379 institutionsQ3 2025: 358 institutionsQ4 2025: 392 institutionsQ1 2026: 451 institutionsQ2 2026: 2 institutions
Value heldQ3 2025: $8.29B
Q1 2021: $10.3BQ2 2021: $11.1BQ3 2021: $12.5BQ4 2021: $13.6BQ1 2022: $6.61BQ2 2022: $5.81BQ3 2022: $6.54BQ4 2022: $6.58BQ1 2023: $8.30BQ2 2023: $7.56BQ3 2023: $4.18BQ4 2023: $5.91BQ1 2024: $7.59BQ2 2024: $6.24BQ3 2024: $6.72BQ4 2024: $8.50BQ1 2025: $9.02BQ2 2025: $9.68BQ3 2025: $8.29BQ4 2025: $7.20BQ1 2026: $9.69BQ2 2026: $16.2K
Institutions holding MASI and their total value by quarter
QuarterHoldersValue
Q2 20262$16.2K
Q1 2026451$9.69B
Q4 2025392$7.20B
Q3 2025358$8.29B
Q2 2025379$9.68B
Q1 2025393$9.02B
Q4 2024366$8.50B
Q3 2024362$6.72B
Q2 2024352$6.24B
Q1 2024339$7.59B
Q4 2023342$5.91B
Q3 2023357$4.18B
Q2 2023415$7.56B
Q1 2023428$8.30B
Q4 2022405$6.58B
Q3 2022418$6.54B
Q2 2022417$5.81B
Q1 2022457$6.61B
Q4 2021520$13.6B
Q3 2021475$12.5B
Q2 2021459$11.1B
Q1 2021481$10.3B

Institutions, Q3 2025

Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q2 2025.

Institutions holding MASI in Q3 2025
InstitutionSharesValue% of portfolioChange in sharesAction
Wealthspire Advisors, LLC112$16.5K0.00%+112New
GWM Advisors LLC112$16.5K0.00%00.0%Unchanged
Optiver Holding B.V.110$16.2K0.00%−14−11.3%Reduced
Fourth Dimension Wealth, LLC100$14.8K0.01%00.0%Unchanged
Parkside Financial Bank & Trust93$13.7K0.00%00.0%Unchanged
Rise Advisors, LLC93$13.7K0.00%00.0%Unchanged
True Wealth Design, LLC89$13.1K0.00%−27−23.3%Reduced
Huntington National Bank83$12.2K0.00%−4−4.6%Reduced
Covestor Ltd81$12.0K0.01%00.0%Unchanged
Central Trust Co79$11.7K0.00%00.0%Unchanged
MAI Capital Management77$11.4K0.00%−125−61.9%Reduced
Boreal Capital Management LLC75$11.1K0.01%00.0%Unchanged
Versant Capital Management, Inc71$10.5K0.00%−1,576−95.7%Reduced
Smithfield Trust Co65$10.0K0.00%00.0%Unchanged
Holos Integrated Wealth LLC68$9.84K0.01%00.0%Unchanged
Investors Research Corp50$7.38K0.00%00.0%Unchanged
Clean Yield Group49$7.23K0.00%00.0%Unchanged
Farmers & Merchants Investments Inc40$5.90K0.00%+4+11.1%Added
Ameriflex Group, Inc.40$5.90K0.00%+20+100.0%Added
Spire Wealth Management39$5.75K0.00%−5−11.4%Reduced
GPS Wealth Strategies Group, LLC37$5.46K0.00%00.0%Unchanged
Steward Partners Investment Advisory, LLC35$5.16K0.00%00.0%Unchanged
Nisa Investment Advisors, LLC30$4.43K0.00%−4−11.8%Reduced
Inlight Wealth Management, LLC30$4.43K0.00%00.0%Unchanged
Essential Partners LLC30$4.43K0.00%+1+3.4%Added
Bell Investment Advisors, Inc29$4.28K0.00%00.0%Unchanged
Larson Financial Group LLC25$3.69K0.00%−8−24.2%Reduced
Sachetta, LLC23$3.39K0.00%00.0%Unchanged
WealthCollab, LLC20$2.95K0.00%00.0%Unchanged
First Horizon Corp19$2.80K0.00%+19New
JFS Wealth Advisors, LLC18$2.66K0.00%−2−10.0%Reduced
Brown Brothers Harriman & Co17$2.51K0.00%00.0%Unchanged
IFP Advisors, Inc16$2.36K0.00%+16Added
J.Safra Asset Management Corp16$2.36K0.00%+1+6.7%Added
Private Wealth Management Group, LLC15$2.21K0.00%00.0%Unchanged
CIBC Private Wealth Group, LLC15$2.21K0.00%−40−72.7%Reduced
ZRC Wealth Management, LLC12$1.77K0.00%+12New
Adirondack Trust Co12$1.77K0.00%00.0%Unchanged
Harbour Investments, Inc.9$1.33K0.00%00.0%Unchanged
Principal Securities, Inc.7$1.03K0.00%+3+75.0%Added
Hemington Wealth Management9$1.00K0.00%−29−76.3%Reduced
Leonteq Securities AG6$8850.00%00.0%Unchanged
Mather Group, LLC.6$8850.00%+6New
Heartwood Wealth Advisors LLC6$8850.00%+6New
Quent Capital, LLC6$8850.00%+6New
Root Financial Partners, LLC6$8850.00%+6New
DiNuzzo Private Wealth, Inc.6$8390.00%00.0%Unchanged
Creative Financial Designs Inc5$7380.00%00.0%Unchanged
Prestige Wealth Management Group LLC4$5910.00%00.0%Unchanged
Cromwell Holdings LLC4$5910.00%00.0%Unchanged
Hughes Financial Services, LLC4$5780.00%00.0%Unchanged
Bare Financial Services, Inc3$4430.00%00.0%Unchanged
Comprehensive Financial Planning, Inc.2$2950.00%00.0%Unchanged
Rothschild Investment LLC2$2950.00%+1+100.0%Added
Tortoise Investment Management, LLC2$2950.00%+1+100.0%Added
Private Trust Co NA1$1480.00%+1New
DecisionPoint Financial, LLC1$1430.00%00.0%Unchanged
Capital Advisors, Ltd. LLC2$00.00%00.0%Unchanged
Holocene Advisors, LP0$00.00%−1,243,607−100.0%Sold out
Woodline Partners LP0$00.00%−182,709−100.0%Sold out
Hawk Ridge Capital Management LP0$00.00%−148,685−100.0%Sold out
PFM Health Sciences, LP0$00.00%−94,451−100.0%Sold out
Point72 (DIFC) Ltd0$00.00%−68,700−100.0%Sold out
FIL Ltd0$00.00%−56,326−100.0%Sold out
Bank of Nova Scotia0$00.00%−53,108−100.0%Sold out
Cinctive Capital Management LP0$00.00%−46,787−100.0%Sold out
Natixis0$00.00%−45,648−100.0%Sold out
4D Advisors, LLC0$00.00%−45,000−100.0%Sold out
Renaissance Technologies LLC0$00.00%−25,377−100.0%Sold out
Point72 Asset Management, L.P.0$00.00%−24,219−100.0%Sold out
Allspring Global Investments Holdings, LLC0$00.00%−20,897−100.0%Sold out
Two Sigma Investments, LP0$00.00%−15,465−100.0%Sold out
Fred Alger Management, LLC0$00.00%−12,185−100.0%Sold out
XTX Topco Ltd0$00.00%−10,837−100.0%Sold out
Calamos Advisors LLC0$00.00%−5,617−100.0%Sold out
Winton Group Ltd0$00.00%−5,617−100.0%Sold out
Brinker Capital Investments, LLC0$00.00%−4,871−100.0%Sold out
RFG Advisory, LLC0$00.00%−3,887−100.0%Sold out
Algert Global LLC0$00.00%−3,570−100.0%Sold out
Bridgefront Capital, LLC0$00.00%−3,564−100.0%Sold out
Northwest & Ethical Investments L.P.0$00.00%−2,100−100.0%Sold out
Atria Investments LLC0$00.00%−1,928−100.0%Sold out
Jane Street Group, LLC0$00.00%−1,872−100.0%Sold out
North Star Asset Management Inc0$00.00%−1,860−100.0%Sold out
RSM US Wealth Management LLC0$00.00%−1,835−100.0%Sold out
Prelude Capital Management, LLC0$00.00%−1,720−100.0%Sold out
Janney Montgomery Scott LLC0$00.00%−1,681−100.0%Sold out
Qsemble Capital Management, LP0$00.00%−1,525−100.0%Sold out
Mercer Global Advisors Inc0$00.00%−1,472−100.0%Sold out
Kera Capital Partners, Inc.0$00.00%−1,380−100.0%Sold out
Keel Point, LLC0$00.00%−1,336−100.0%Sold out
Pitcairn Co0$00.00%−1,320−100.0%Sold out
Zacks Investment Management0$00.00%−1,290−100.0%Sold out
Vontobel Holding Ltd.0$00.00%−1,282−100.0%Sold out
Forum Financial Management, LP0$00.00%−1,266−100.0%Sold out
Ballentine Partners, LLC0$00.00%−1,255−100.0%Sold out
Greenleaf Trust0$00.00%−1,217−100.0%Sold out
Knollwood Investment Advisory, LLC0$00.00%−1,200−100.0%Sold out
HB Wealth Management, LLC0$00.00%−1,193−100.0%Sold out
United Community Bank0$00.00%−946−100.0%Sold out