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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, Q4 2021

Institutional positions in Masimo Corp as of Dec 31, 2021. 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
520
+53 vs. Q3 2021
Shares held
46.4M
+141.5K (+0.3%) vs. Q3 2021
Total value
$13.6B
+$1.05B (+8.4%) vs. Q3 2021
New holders
95
182 more added
Sold out
42
156 more reduced

8 institutions that held it in Q3 2021 haven't filed for Q4 2021 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.

Compare with Q3 2021: 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 holdersQ4 2021: 520 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 heldQ4 2021: $13.6B
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, Q4 2021

Shares, value and share of portfolio for each institution holding Masimo Corp; share changes are against Q3 2021.

Institutions holding MASI in Q4 2021
InstitutionSharesValue% of portfolioChange in sharesAction
Coldstream Capital Management Inc2,224$651.0K0.02%+957+75.5%Added
Allspring Global Investments Holdings, LLC2,212$647.0K0.00%+2,212New
Symmetry Partners, LLC2,178$638.0K0.04%00.0%Unchanged
BancorpSouth Bank2,172$636.0K0.08%00.0%Unchanged
Eqis Capital Management, Inc.2,141$627.0K0.05%−245−10.3%Reduced
Conestoga Capital Advisors, LLC2,140$627.0K0.01%+835+64.0%Added
M&T Bank Corp2,127$624.0K0.00%−40−1.8%Reduced
Verition Fund Management LLC2,130$624.0K0.01%+2,130New
Panagora Asset Management Inc2,112$618.0K0.00%−499−19.1%Reduced
KBC Group NV2,060$603.0K0.00%−17,393−89.4%Reduced
Independent Advisor Alliance2,054$602.0K0.03%−20−1.0%Reduced
Gotham Asset Management, LLC1,991$583.0K0.02%+700+54.2%Added
Bessemer Group Inc1,990$582.0K0.00%+970+95.1%Added
Yorktown Management & Research Co Inc1,950$571.0K0.39%00.0%Unchanged
Janney Capital Management LLC1,901$557.0K0.04%+20+1.1%Added
Sonen Capital LLC1,902$557.0K0.54%+1,902New
FORA Capital, LLC1,848$541.0K0.21%+217+13.3%Added
Silvercrest Asset Management Group LLC1,833$537.0K0.00%+175+10.6%Added
Vident Investment Advisory, LLC1,820$534.0K0.01%+1,820New
PEAK6 Investments LLC1,820$533.0K0.01%−1,871−50.7%Reduced
Mitsubishi UFJ Asset Management (UK) Ltd.1,800$527.0K0.22%00.0%Unchanged
Oak Thistle LLC1,781$521.0K0.40%+1,781New
Wealthfront Advisers LLC1,743$511.0K0.00%+138+8.6%Added
Swiss Life Asset Management Ltd1,706$499.5K0.01%00.0%Unchanged
EFG Asset Management (Americas) Corp.1,706$499.0K0.08%+18+1.1%Added
TownSquare Capital, LLC1,703$499.0K0.01%+602+54.7%Added
Dynamic Technology Lab Private Ltd1,700$498.0K0.06%+1,700New
Keybank National Association1,695$496.0K0.00%+203+13.6%Added
AE Wealth Management LLC1,630$477.0K0.00%−64−3.8%Reduced
Red Spruce Capital, LLC1,617$473.0K0.26%00.0%Unchanged
GWM Advisors LLC1,581$463.0K0.01%+25+1.6%Added
Equitable Trust Co1,561$457.0K0.03%−160−9.3%Reduced
Tocqueville Asset Management L.P.1,500$439.0K0.01%00.0%Unchanged
Bluestein R H & Co1,500$439.0K0.02%00.0%Unchanged
Vestcor Inc1,479$433.0K0.02%−220−12.9%Reduced
Buckhead Capital Management LLC1,465$429.0K0.09%00.0%Unchanged
CAPROCK Group, Inc.1,459$427.0K0.04%00.0%Unchanged
Kestra Advisory Services, LLC1,440$422.0K0.00%−1−0.1%Reduced
Bridgefront Capital, LLC1,403$411.0K0.40%+548+64.1%Added
Central Trust Co1,404$411.0K0.01%+1,204+602.0%Added
Synergy Financial Group, LTD1,396$409.0K0.37%+1,396New
Magnetar Financial LLC1,390$407.0K0.00%+1,390New
M&G Investment Management Ltd1,371$402.0K0.00%+74+5.7%Added
Harvest Investment Services, LLC1,365$399.0K0.17%−394−22.4%Reduced
Walleye Trading LLC1,344$393.0K0.01%+239+21.6%Added
Capital Analysts, LLC1,335$391.0K0.02%00.0%Unchanged
Bowling Portfolio Management LLC1,310$384.0K0.08%−1−0.1%Reduced
Quantinno Capital Management LP1,294$379.0K0.07%−548−29.8%Reduced
B. Metzler seel. Sohn & Co. AG1,271$378.0K0.00%+1,271New
Graham Capital Management, L.P.1,287$376.0K0.02%+1,287New
Financial Advocates Investment Management1,341$374.0K0.03%+81+6.4%Added
Van Eck Associates Corp1,278$374.0K0.00%+1,278New
JSF Financial, LLC1,272$372.0K0.18%+1,272New
Nisa Investment Advisors, LLC1,661$365.0K0.00%−265−13.8%Reduced
Advisor Partners LLC1,238$363.0K0.02%+123+11.0%Added
Stiles Financial Services Inc1,235$362.0K0.17%+1,235New
Echo Street Capital Management LLC1,214$355.0K0.00%+63+5.5%Added
J2 Capital Management Inc1,211$355.0K0.34%+1,211New
First Citizens Bank & Trust Co1,207$353.0K0.01%+11+0.9%Added
Regal Investment Advisors LLC1,184$347.0K0.03%+33+2.9%Added
Willner & Heller, LLC1,255$340.0K0.45%+1,255New
JustInvest LLC1,159$339.0K0.02%+248+27.2%Added
Bank of Nova Scotia1,157$339.0K0.00%+1,157New
Astrantus Ltd1,157$339.0K0.25%+1,157New
Cigna Investments Inc1,151$337.0K0.03%−420−26.7%Reduced
Hennion & Walsh Asset Management, Inc.1,149$336.0K0.02%−16−1.4%Reduced
Banco Bilbao Vizcaya Argentaria, S.A.1,131$336.0K0.00%00.0%Unchanged
Whittier Trust Co1,134$332.0K0.01%00.0%Unchanged
Redpoint Investment Management Pty Ltd1,122$328.0K0.03%−39−3.4%Reduced
First Heartland Consultants, Inc.1,092$319.0K0.04%−190−14.8%Reduced
Walleye Capital LLC1,080$316.0K0.01%+1,080New
Boothbay Fund Management, LLC1,052$308.0K0.01%+1,052New
United Community Bank1,027$300.7K0.30%+1,027New
Laurel Wealth Advisors, Inc.1,020$299.0K0.02%00.0%Unchanged
Hills Bank & Trust Co1,007$295.0K0.04%00.0%Unchanged
LGT Fund Management Co Ltd.1,000$293.0K0.08%+1,000New
Advisory Services Network, LLC999$292.0K0.01%+55+5.8%Added
Keebeck Alpha, LP999$292.0K0.11%+999New
Harbor Investment Advisory, LLC995$291.0K0.04%00.0%Unchanged
Occudo Quantitative Strategies LP955$280.0K0.02%−643−40.2%Reduced
Gsa Capital Partners LLP957$280.0K0.04%+957New
Captrust Financial Advisors952$279.0K0.00%−320−25.2%Reduced
Summit Global Investments921$270.0K0.02%−5,416−85.5%Reduced
Livforsakringsbolaget Skandia, Omsesidigt900$263.0K0.02%00.0%Unchanged
SeaCrest Wealth Management, LLC890$261.0K0.03%00.0%Unchanged
Martingale Asset Management L P882$259.0K0.00%00.0%Unchanged
Meridian Wealth Management, LLC870$255.0K0.03%−15−1.7%Reduced
CWM, LLC871$255.0K0.00%+871New
YHB Investment Advisors, Inc.859$251.0K0.02%−4−0.5%Reduced
Prelude Capital Management, LLC856$251.0K0.01%+856New
Federation des caisses Desjardins du Quebec855$250.2K0.00%−349−29.0%Reduced
Windsor Group LTD880$246.0K0.05%00.0%Unchanged
IBM Retirement Fund834$244.0K0.03%−587−41.3%Reduced
Navellier & Associates Inc830$243.0K0.04%−6−0.7%Reduced
Mercer Global Advisors Inc829$243.0K0.00%+2+0.2%Added
Patten Group, Inc.827$242.0K0.06%−180−17.9%Reduced
Verdence Capital Advisors LLC818$239.0K0.03%+818New
HBK Sorce Advisory LLC806$236.0K0.01%−129−13.8%Reduced
6 Meridian803$235.0K0.02%+4+0.5%Added
Resources Investment Advisors, LLC.800$234.0K0.01%−66−7.6%Reduced