L3VLUP
← Every manager
Free · no sign-up · Q2 2026

Which funds own MASI

Masimo Corp in the Q2 2026 filings. None of the 91 current managers lists it among its largest positions this quarter. What is here is what they held before selling out.

Managers holding
0
at least, of 91 current
Combined value
$0
as reported
Opened
0
new this quarter
Added to
0
already held
Trimmed or sold out
32
32 sold out entirely

Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.

Sold out of this quarter

Valued at what the position was worth in the previous filing, because by this one it is gone.

Ownership through time

At least 22 of the 95 managers whose filings are on file listed MASI in Q1 2026, against 1 in Q2 2013. 12 managers more than in Q4 2025: 8 started positions; 7 listed it again; 2 sold out, by their own filings; 1 no longer listed it among the positions read, which can mean a holding below the listed range, a filing that reported no holdings, or a filing not yet made.

Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.

Managers on file listing it
01122Q2 2013: 1Q1 2014: 214Q2 2014: 4Q3 2014: 3Q4 2014: 6Q1 2015: 315Q2 2015: 4Q3 2015: 4Q4 2015: 4Q1 2016: 416Q2 2016: 7Q3 2016: 8Q4 2016: 8Q1 2017: 1217Q2 2017: 9Q3 2017: 10Q4 2017: 9Q1 2018: 1218Q2 2018: 18Q3 2018: 18Q4 2018: 20Q1 2019: 2019Q2 2019: 16Q3 2019: 14Q4 2019: 14Q1 2020: 1320Q2 2020: 14Q3 2020: 11Q4 2020: 8Q1 2021: 1121Q2 2021: 11Q3 2021: 15Q4 2021: 17Q1 2022: 2122Q2 2022: 19Q3 2022: 16Q4 2022: 12Q1 2023: 923Q2 2023: 10Q3 2023: 13Q4 2023: 13Q1 2024: 1124Q2 2024: 13Q3 2024: 12Q4 2024: 13Q1 2025: 1425Q2 2025: 10Q3 2025: 8Q4 2025: 10Q1 2026: 2226
  • Q2 2013: 1
  • Q1 2014: 2
  • Q2 2014: 4
  • Q3 2014: 3
  • Q4 2014: 6
  • Q1 2015: 3
  • Q2 2015: 4
  • Q3 2015: 4
  • Q4 2015: 4
  • Q1 2016: 4
  • Q2 2016: 7
  • Q3 2016: 8
  • Q4 2016: 8
  • Q1 2017: 12
  • Q2 2017: 9
  • Q3 2017: 10
  • Q4 2017: 9
  • Q1 2018: 12
  • Q2 2018: 18
  • Q3 2018: 18
  • Q4 2018: 20
  • Q1 2019: 20
  • Q2 2019: 16
  • Q3 2019: 14
  • Q4 2019: 14
  • Q1 2020: 13
  • Q2 2020: 14
  • Q3 2020: 11
  • Q4 2020: 8
  • Q1 2021: 11
  • Q2 2021: 11
  • Q3 2021: 15
  • Q4 2021: 17
  • Q1 2022: 21
  • Q2 2022: 19
  • Q3 2022: 16
  • Q4 2022: 12
  • Q1 2023: 9
  • Q2 2023: 10
  • Q3 2023: 13
  • Q4 2023: 13
  • Q1 2024: 11
  • Q2 2024: 13
  • Q3 2024: 12
  • Q4 2024: 13
  • Q1 2025: 14
  • Q2 2025: 10
  • Q3 2025: 8
  • Q4 2025: 10
  • Q1 2026: 22
Their combined reported value
$0$1bn$3bnQ2 2013: $2.6mQ1 2014: $3.1m14Q2 2014: $6.3mQ3 2014: $5.5mQ4 2014: $61mQ1 2015: $92m15Q2 2015: $96mQ3 2015: $84mQ4 2015: $91mQ1 2016: $94m16Q2 2016: $165mQ3 2016: $190mQ4 2016: $187mQ1 2017: $482m17Q2 2017: $420mQ3 2017: $359mQ4 2017: $313mQ1 2018: $397m18Q2 2018: $432mQ3 2018: $899mQ4 2018: $768mQ1 2019: $1.0bn19Q2 2019: $1.6bnQ3 2019: $1.6bnQ4 2019: $1.8bnQ1 2020: $2.1bn20Q2 2020: $2.3bnQ3 2020: $2.0bnQ4 2020: $1.9bnQ1 2021: $1.4bn21Q2 2021: $1.3bnQ3 2021: $1.7bnQ4 2021: $2.0bnQ1 2022: $877m22Q2 2022: $610mQ3 2022: $988mQ4 2022: $1.2bnQ1 2023: $1.7bn23Q2 2023: $1.6bnQ3 2023: $939mQ4 2023: $1.6bnQ1 2024: $2.2bn24Q2 2024: $1.4bnQ3 2024: $1.6bnQ4 2024: $2.5bnQ1 2025: $2.8bn25Q2 2025: $2.8bnQ3 2025: $2.2bnQ4 2025: $1.8bnQ1 2026: $1.5bn26
  • Q2 2013: $2.6m
  • Q1 2014: $3.1m
  • Q2 2014: $6.3m
  • Q3 2014: $5.5m
  • Q4 2014: $61m
  • Q1 2015: $92m
  • Q2 2015: $96m
  • Q3 2015: $84m
  • Q4 2015: $91m
  • Q1 2016: $94m
  • Q2 2016: $165m
  • Q3 2016: $190m
  • Q4 2016: $187m
  • Q1 2017: $482m
  • Q2 2017: $420m
  • Q3 2017: $359m
  • Q4 2017: $313m
  • Q1 2018: $397m
  • Q2 2018: $432m
  • Q3 2018: $899m
  • Q4 2018: $768m
  • Q1 2019: $1.0bn
  • Q2 2019: $1.6bn
  • Q3 2019: $1.6bn
  • Q4 2019: $1.8bn
  • Q1 2020: $2.1bn
  • Q2 2020: $2.3bn
  • Q3 2020: $2.0bn
  • Q4 2020: $1.9bn
  • Q1 2021: $1.4bn
  • Q2 2021: $1.3bn
  • Q3 2021: $1.7bn
  • Q4 2021: $2.0bn
  • Q1 2022: $877m
  • Q2 2022: $610m
  • Q3 2022: $988m
  • Q4 2022: $1.2bn
  • Q1 2023: $1.7bn
  • Q2 2023: $1.6bn
  • Q3 2023: $939m
  • Q4 2023: $1.6bn
  • Q1 2024: $2.2bn
  • Q2 2024: $1.4bn
  • Q3 2024: $1.6bn
  • Q4 2024: $2.5bn
  • Q1 2025: $2.8bn
  • Q2 2025: $2.8bn
  • Q3 2025: $2.2bn
  • Q4 2025: $1.8bn
  • Q1 2026: $1.5bn

Between the quarter ends of Q4 2025 and Q1 2026. Each change in shares is valued at the Q1 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.

Largest increases, by shares

Largest decreases, by shares

ManagerValue over timeFirst listedLargestQ1 2026
MFS Investment ManagementQ4 2014$417m$417m
Millennium Management LLCQ1 2018$176m$176m
AQR Capital Management LLCQ3 2018$147m$147m
Balyasny Asset Management LLCQ2 2013$137m$137m
Davidson Kempner Capital Management LPQ1 2026$104m$104m
Neuberger Berman Group LLCQ3 2019$182m$72m
Squarepoint Ops LLCQ1 2017$92m$69m
Capital Research Global InvestorsQ4 2022$406m$64m
Hudson Bay Capital Management LPQ3 2023$59m$59m
Renaissance Technologies LLCQ1 2017$59m$43m
Man Group PLCQ1 2018$53m$30m
Woodline Partners LPQ2 2022$33m$27m
Tudor Investment CorpQ1 2014$26m$26m
Schonfeld Strategic Advisors LLCQ4 2016$34m$21m
Winton Group LtdQ3 2017$20m$20m
Fidelity (FMR LLC)Q3 2018$1.4bnlast listed Q4 2025
Invesco LtdQ2 2019$401mlast listed Q4 2021
Wellington Management Group LLPQ2 2019$380mlast listed Q4 2021
Holocene Advisors LPQ2 2021$222mlast listed Q2 2025
Farallon Capital Management LLCQ2 2022$219mlast listed Q4 2024
Citadel Advisors LLCQ1 2018$198mlast listed Q1 2024
Durable Capital Partners LPQ1 2025$196mlast listed Q3 2025
Acadian Asset Management LLCQ2 2016$163mlast listed Q4 2022
Viking Global Investors LPQ2 2025$158mlast listed Q4 2025
AllianceBernstein LPQ4 2024$157mlast listed Q2 2025

What MASI is worth

Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.

Build the comp set around MASI →

How much of the picture this is

A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.

What to do with a name the funds are buying

Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.

Company names, tickers and logos are the trademarks of their respective owners and appear here to identify the company whose public figures are being used. L3VLUP is not affiliated with, sponsored by or endorsed by any company shown, and nothing here is a statement by or about that company. More

The holdings, every quarter, and the week between

One email a week on what moved in the market and what it means for the people interviewing into it, with the 13F changes the quarter they are filed.

One email a week, free, and you can leave at any point.