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Masimo Corp

MASIDelisted
Industry
Electromedical & Electrotherapeutic Apparatus
SEC CIK
0000937556

Masimo Corp was delisted in 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.

Institutional holdersQ1 2026: 451 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 heldQ1 2026: $9.69B
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, Q1 2026

Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q4 2025.

Institutions holding MASI in Q1 2026
InstitutionSharesValue% of portfolioChange in sharesAction
Capital Advisors, Ltd. LLC2$00.00%00.0%Unchanged
DecisionPoint Financial, LLC1$1780.00%00.0%Unchanged
American Capital Advisory, LLC1$1780.00%00.0%Unchanged
Private Trust Co NA1$1780.00%00.0%Unchanged
GHP Investment Advisors, Inc.1$1780.00%+1New
Comprehensive Financial Planning, Inc.2$3550.00%00.0%Unchanged
Larson Financial Group LLC2$3560.00%−2−50.0%Reduced
Bare Financial Services, Inc2$3560.00%00.0%Unchanged
MV Capital Management, Inc.2$3560.00%+2New
Cornerstone Planning Group LLC2$3580.00%00.0%Unchanged
Transamerica Financial Advisors, Inc.4$7110.00%+4New
Bogart Wealth, LLC4$7110.00%+4New
Prestige Wealth Management Group LLC4$7120.00%00.0%Unchanged
Creative Financial Designs Inc5$8890.00%00.0%Unchanged
Raleigh Capital Management Inc.5$8890.00%+5New
DiNuzzo Private Wealth, Inc.5$8900.00%00.0%Unchanged
Leonteq Securities AG6$1.07K0.00%00.0%Unchanged
Cornerstone Financial Management LLC6$1.07K0.00%00.0%Unchanged
Horizon Investments, LLC6$1.07K0.00%+6New
Dunhill Financial, LLC6$1.10K0.00%+5+500.0%Added
Hughes Financial Services, LLC7$1.25K0.00%+1+16.7%Added
Cromwell Holdings LLC7$1.25K0.00%+3+75.0%Added
Freestone Grove Partners LP7$1.25K0.00%+7New
Valued Wealth Advisors LLC7$1.25K0.00%+7New
NBT Bank N A8$1.42K0.00%+8New
Marquette Asset Management, LLC8$1.42K0.00%+8New
First Pacific Financial9$1.60K0.00%+9New
Keating Financial Advisory Services, Inc.10$1.78K0.00%+10New
SHP Wealth Management11$1.96K0.00%+9+450.0%Added
Zions Bancorporation, National Association11$1.96K0.00%+11New
Addison Advisors LLC11$1.96K0.00%+11New
Adirondack Trust Co12$2.13K0.00%00.0%Unchanged
Westside Investment Management, Inc.14$2.49K0.00%00.0%Unchanged
Twin Peaks Wealth Advisors, LLC15$2.67K0.00%+15New
Private Wealth Management Group, LLC15$2.67K0.00%00.0%Unchanged
JFS Wealth Advisors, LLC17$3.02K0.00%−1−5.6%Reduced
Brown Brothers Harriman & Co17$3.02K0.00%00.0%Unchanged
Sunrise Financial Services, LLC17$3.02K0.00%00.0%Unchanged
Parkside Financial Bank & Trust18$3.20K0.00%−91−83.5%Reduced
First Horizon Corp19$3.38K0.00%00.0%Unchanged
ZRC Wealth Management, LLC19$3.38K0.00%+13+216.7%Added
Ameriflex Group, Inc.20$3.56K0.00%00.0%Unchanged
WealthCollab, LLC20$3.56K0.00%00.0%Unchanged
High Note Wealth, LLC21$3.73K0.00%+12+133.3%Added
Sachetta, LLC23$4.09K0.00%00.0%Unchanged
Pinnacle Wealth Planning Services, Inc.25$4.45K0.00%00.0%Unchanged
Vanguard National Trust Co25$4.45K0.00%+25New
Versant Capital Management, Inc27$4.80K0.00%00.0%Unchanged
Ancora Advisors, LLC29$5.16K0.00%00.0%Unchanged
Harbour Investments, Inc.31$5.51K0.00%+22+244.4%Added
Clearstead Advisors, LLC35$6.23K0.00%−1,354−97.5%Reduced
Quent Capital, LLC37$6.58K0.00%+2+5.7%Added
Basecamp Wealth Advisors LLC38$6.76K0.00%−24−38.7%Reduced
Spire Wealth Management39$6.94K0.00%00.0%Unchanged
Nisa Investment Advisors, LLC41$7.29K0.00%+11+36.7%Added
Farmers & Merchants Investments Inc42$7.47K0.00%00.0%Unchanged
Quarry LP44$7.83K0.00%+3+7.3%Added
Covestor Ltd45$8.00K0.01%−36−44.4%Reduced
Torren Management, LLC46$8.18K0.00%−223−82.9%Reduced
Clean Yield Group49$8.72K0.00%00.0%Unchanged
Investors Research Corp50$8.89K0.00%00.0%Unchanged
Northwestern Mutual Wealth Management Co52$9.25K0.00%−2−3.7%Reduced
Smithfield Trust Co65$11.0K0.00%00.0%Unchanged
Holos Integrated Wealth LLC68$12.2K0.01%00.0%Unchanged
Boreal Capital Management LLC75$13.3K0.01%00.0%Unchanged
Central Trust Co79$14.1K0.00%00.0%Unchanged
Bell Investment Advisors, Inc81$14.4K0.00%+60+285.7%Added
Steward Partners Investment Advisory, LLC88$15.7K0.00%+53+151.4%Added
Harbor Investment Advisory, LLC100$17.8K0.00%−524−84.0%Reduced
Fourth Dimension Wealth, LLC100$17.8K0.01%00.0%Unchanged
Strive Financial Group ,LLC120$21.0K0.01%00.0%Unchanged
Nomura Asset Management Co Ltd120$21.3K0.00%00.0%Unchanged
NBC Securities, Inc.146$26.0K0.00%−50−25.5%Reduced
JPL Wealth Management, LLC156$27.7K0.01%+156New
Activest Wealth Management158$28.1K0.00%−29−15.5%Reduced
SJS Investment Consulting Inc.162$28.8K0.00%−14−8.0%Reduced
True Wealth Design, LLC172$30.6K0.01%+88+104.8%Added
Hilltop National Bank218$38.8K0.01%00.0%Unchanged
Los Angeles Capital Management LLC220$39.1K0.00%00.0%Unchanged
Massmutual Trust Co FSB220$39.1K0.00%−3−1.3%Reduced
Ronald Blue Trust, Inc.232$41.3K0.00%−74−24.2%Reduced
Wealth Preservation Advisors, LLC248$44.1K0.04%+248New
SBI Securities Co., Ltd.270$48.0K0.00%+4+1.5%Added
Aster Capital Management (DIFC) Ltd293$48.8K0.02%+77+35.6%Added
Advisory Services Network, LLC278$49.4K0.00%+278New
Advisor Group Holdings, Inc.317$56.5K0.00%−160−33.5%Reduced
Sterling Capital Management LLC322$57.3K0.00%−10,563−97.0%Reduced
Signaturefd, LLC346$61.5K0.00%−62−15.2%Reduced
Smartleaf Asset Management LLC356$63.1K0.00%+42+13.4%Added
DHJJ Financial Advisors, Ltd.360$64.0K0.02%00.0%Unchanged
Longfellow Investment Management Co LLC429$76.3K0.02%+429New
Umb Bank N A444$79.0K0.00%−21−4.5%Reduced
Root Financial Partners, LLC457$81.3K0.00%+451+7,516.7%Added
Bayforest Capital Ltd521$92.7K0.10%+57+12.3%Added
GAMMA Investing LLC586$104.2K0.00%+303+107.1%Added
Rothschild Investment LLC606$107.8K0.01%+345+132.2%Added
Parallel Advisors, LLC624$111.0K0.00%+340+119.7%Added
IFP Advisors, Inc717$127.5K0.00%+208+40.9%Added
BNP PARIBAS ASSET MANAGEMENT Holding S.A.782$139.1K0.00%−231,783−99.7%Reduced
Eurizon Capital SGR S.p.A.845$150.6K0.00%+61+7.8%Added