Vault-13

MASIMO CORP MASI

COM · Common Stock · CUSIP 574795100 · ISIN US5747951003

405 institutional holders -15 vs Q3 2022
44,374,23144.4m shares reported held*
$6.6bnreported value*
38 new 116 added 171 reduced 61 sold out net sold ≈ $213.2m (-1.4m shares)

* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($8.5m this quarter). Holder counts are more reliable. Implied quarter-end price ≈ $147.98. Options: 12 managers hold calls ($17.1m notional), 6 hold puts ($7.5m).

Trends to Q4 2022

Institutional holders

Managers reporting a position, each quarter

0200400600Q3 22: 420Q4 22: 405405Q3 22Q4 22
Numbers
QuarterHolders
Q3 2022420
Q4 2022405

Calls vs puts

Options held, notional value, last 4 quarters. P/C = puts ÷ calls

CallsPuts
$0$5m$10m$15m$20mQ3 22 calls: $11.8mQ3 22 puts: $5.0mQ3 22P/C 0.43Q4 22 calls: $17.1mQ4 22 puts: $7.5mQ4 22P/C 0.44
Numbers
QuarterCallsPutsP/C
Q3 2022$11.8m$5.0m0.43
Q4 2022$17.1m$7.5m0.44

Biggest buyers

FMR LLC Added +1,599,054+1.6m
Capital Research Global Investors New +950,719+950.7k
BlackRock Inc. Added +542,124+542.1k
T. Rowe Price Investment Management, Inc. New +541,760+541.8k
VANGUARD GROUP INC Added +227,439+227.4k
FARALLON CAPITAL MANAGEMENT, L.L.C. Added +181,500+181.5k
SCHRODER INVESTMENT MANAGEMENT GROUP Added +178,753+178.8k
Alyeska Investment Group, L.P. Added +155,797+155.8k
RENAISSANCE TECHNOLOGIES LLC Added +131,900+131.9k
MIG Capital, LLC New +126,879+126.9k

Biggest sellers

Champlain Investment Partners, LLC Sold out -934,762-934.8k
CITIGROUP INC Reduced -504,700-504.7k
GOLDMAN SACHS GROUP INC Reduced -454,578-454.6k
BANK OF NOVA SCOTIA Reduced -398,039-398.0k
NEUBERGER BERMAN GROUP LLC Reduced -378,251-378.3k
MILLENNIUM MANAGEMENT LLC Reduced -357,690-357.7k
Assenagon Asset Management S.A. Reduced -264,769-264.8k
HSBC HOLDINGS PLC Reduced -231,567-231.6k
MANUFACTURERS LIFE INSURANCE COMPANY, THE Reduced -218,022-218.0k
MORGAN STANLEY Reduced -212,587-212.6k

Biggest calls

SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $4.4m29.5k shares
CITADEL ADVISORS LLC Added $3.8m25.6k shares
Cinctive Capital Management LP New $3.0m20.0k shares
MILLENNIUM MANAGEMENT LLC Added $2.2m15.0k shares
WOLVERINE TRADING, LLC New $1.8m12.5k shares
GROUP ONE TRADING LLC New $532.6k3.6k shares
Walleye Trading LLC Unchanged $384.7k2.6k shares
PEAK6 Investments LLC Added $384.7k2.6k shares
SIMPLEX TRADING, LLC Added $310.0k2.1k shares
JANE STREET GROUP, LLC Reduced $251.5k1.7k shares

Biggest puts

CITADEL ADVISORS LLC Added $3.8m25.8k shares
SUSQUEHANNA INTERNATIONAL GROUP, LLP Added $2.0m13.4k shares
PEAK6 Investments LLC Reduced $1.1m7.6k shares
WOLVERINE TRADING, LLC New $518.0k3.5k shares
SIMPLEX TRADING, LLC Unchanged $29.0k200 shares
CONCOURSE FINANCIAL GROUP SECURITIES, INC. Unchanged $00 shares

Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.

Major shareholders (over 5%)

Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.

HolderStakeChangeShares Last filed
BlackRock, Inc. 13G · institution filed 2025-02-07 7.9% 4.2m 2025-02-07
KIANI JOE E 13G · exempt (held before listing) -3.8 pts · filed 2026-05-14 6.5% -3.8 pts 3.7m 2026-05-14
BARCLAYS PLC 13G · institution new · filed 2026-05-14 5.5% new 2.9m 2026-05-14

Fell to 5% or below in the last year: Pentwater Capital Management LP (0.0%, 2026-08-14), Politan Capital Management LP (0.0%, 2026-06-11), BlackRock Portfolio Management LLC (0.2%, 2026-04-30; now reported by BlackRock, Inc.), VANGUARD GROUP INC (0.0%, 2026-03-27), FMR LLC (4.5%, 2026-03-06)

Holders, Q4 2022

#ManagerLocationShares Value% of their portfolioChangeShares change
1 BlackRock Inc. 0.03% of their portfolio New York, NY 5,956,9486.0m $881.3m $881.3m 0.03% Added +542.1k +542,124
2 FMR LLC 0.08% of their portfolio BOSTON, MA 5,456,3445.5m $807.3m $807.3m 0.08% Added +1.6m +1,599,054
3 VANGUARD GROUP INC 0.02% of their portfolio Valley Forge, PA 4,855,5014.9m $718.4m $718.4m 0.02% Added +227.4k +227,439
4 Politan Capital Management LP 39.47% of their portfolio NEW YORK, NY 4,739,9634.7m $701.3m $701.3m 39.47% Added +91.1k +91,094
5 STATE STREET CORP 0.01% of their portfolio BOSTON, MA 1,698,7591.7m $251.3m $251.3m 0.01% Added +41.6k +41,611
6 RTW INVESTMENTS, LP 4.53% of their portfolio NEW YORK, NY 1,501,4931.5m $222.1m $222.1m 4.53% Added +61.5k +61,500
7 Capital Research Global Investors 0.04% of their portfolio Los Angeles, CA 950,719950.7k $140.7m $140.7m 0.04% New
8 Liontrust Investment Partners LLP 2.46% of their portfolio LONDON, X0 950,700950.7k $140.7m $140.7m 2.46% Reduced -191.4k -191,400
9 Fundsmith LLP 0.52% of their portfolio LONDON, X0 764,319764.3k $113.1m $113.1m 0.52% Reduced -842 -842
10 FARALLON CAPITAL MANAGEMENT, L.L.C. 0.73% of their portfolio SAN FRANCISCO, CA 758,500758.5k $112.2m $112.2m 0.73% Added +181.5k +181,500
11 GEODE CAPITAL MANAGEMENT, LLC 0.01% of their portfolio BOSTON, MA 703,196703.2k $103.9m $103.9m 0.01% Added +31.7k +31,667
12 SCHRODER INVESTMENT MANAGEMENT GROUP 0.14% of their portfolio London, X0 577,277577.3k $85.4m $85.4m 0.14% Added +178.8k +178,753
13 MARTIN CURRIE LTD 3.15% of their portfolio EDINBURGH, X0 545,148545.1k $80.7m $80.7m 3.15% Reduced -27.2k -27,185
14 T. Rowe Price Investment Management, Inc. 0.06% of their portfolio BALTIMORE, MD 541,760541.8k $80.2m $80.2m 0.06% New
15 Bank of New York Mellon Corp 0.02% of their portfolio NEW YORK, NY 538,352538.4k $79.6m $79.6m 0.02% Reduced -4.0k -4,017
16 MORGAN STANLEY 0.01% of their portfolio NEW YORK, NY 483,255483.3k $71.5m $71.5m 0.01% Reduced -212.6k -212,587
17 BNP PARIBAS ASSET MANAGEMENT Holding S.A. 0.25% of their portfolio Paris, I0 479,249479.2k $70.9m $70.9m 0.25% Added +9.7k +9,663
18 NORTHERN TRUST CORP 0.01% of their portfolio CHICAGO, IL 461,636461.6k $68.3m $68.3m 0.01% Reduced -6.2k -6,192
19 Sumitomo Mitsui Trust Group, Inc. 0.05% of their portfolio CHIYODA-KU, TOKYO, M0 384,481384.5k $56.9m $56.9m 0.05% Added +1.8k +1,784
20 TWO SIGMA ADVISERS, LP 0.15% of their portfolio NEW YORK, NY 359,000359.0k $53.1m $53.1m 0.15% Reduced -34.9k -34,900
21 CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.02% of their portfolio SAN FRANCISCO, CA 353,647353.6k $52.3m $52.3m 0.02% Added +20.0k +20,025
22 Legal & General Group Plc 0.02% of their portfolio London, X0 330,175330.2k $48.8m $48.8m 0.02% Reduced -13.4k -13,363
23 Ensemble Capital Management, LLC 5.00% of their portfolio San Francisco, CA 325,753325.8k $48.2m $48.2m 5.00% Reduced -17.2k -17,173
24 GENEVA CAPITAL MANAGEMENT LLC 1.00% of their portfolio MILWAUKEE, WI 299,855299.9k $44.4m $44.4m 1.00% Reduced -2.2k -2,182
25 NORGES BANK 0.01% of their portfolio OSLO, Q8 290,079290.1k $42.9m $42.9m 0.01% Added +93.6k +93,589
26 D. E. Shaw & Co., Inc. 0.07% of their portfolio New York, NY 282,372282.4k $41.8m $41.8m 0.07% Reduced -112.3k -112,280
27 GOLDMAN SACHS GROUP INC 0.01% of their portfolio NEW YORK, NY 274,056274.1k $40.5m $40.5m 0.01% Reduced -454.6k -454,578
28 JPMORGAN CHASE & CO 0.01% of their portfolio NEW YORK, NY 268,299268.3k $39.7m $39.7m 0.01% Reduced -80.4k -80,414
29 J.P. Morgan Private Wealth Advisors LLC 0.09% of their portfolio SAN FRANCISCO, CA 262,951263.0k $38.9m $38.9m 0.09% Reduced -15.5k -15,508
30 RAYMOND JAMES & ASSOCIATES 0.04% of their portfolio ST PETERSBURG, FL 261,745261.7k $38.7m $38.7m 0.04% Reduced -21.3k -21,283
31 Alyeska Investment Group, L.P. 0.39% of their portfolio CHICAGO, IL 255,797255.8k $37.8m $37.8m 0.39% Added +155.8k +155,797
32 Obermeyer Wealth Partners 2.72% of their portfolio ASPEN, CO 243,546243.5k $36.0m $36.0m 2.72% Reduced -20.0k -19,953
33 DIMENSIONAL FUND ADVISORS LP 0.01% of their portfolio AUSTIN, TX 228,662228.7k $33.8m $33.8m 0.01% Added +3.4k +3,375
34 BANK OF MONTREAL /CAN/ 0.01% of their portfolio TORONTO, A6 207,229207.2k $30.7m $30.7m 0.01% Added +79.5k +79,494
35 Swiss National Bank 0.02% of their portfolio ZURICH, V8 202,800202.8k $30.0m $30.0m 0.02% Reduced -25.7k -25,714
36 PRINCIPAL FINANCIAL GROUP INC 0.02% of their portfolio DES MOINES, IA 194,240194.2k $28.7m $28.7m 0.02% Added +2.0k +2,001
37 HAWK RIDGE CAPITAL MANAGEMENT LP 1.92% of their portfolio LOS ANGELES, CA 192,121192.1k $28.4m $28.4m 1.92% Added +12.8k +12,813
38 MILLENNIUM MANAGEMENT LLC 0.03% of their portfolio NEW YORK, NY 190,936190.9k $28.2m $28.2m 0.03% Reduced -357.7k -357,690
39 RENAISSANCE TECHNOLOGIES LLC 0.04% of their portfolio NEW YORK, NY 179,700179.7k $26.6m $26.6m 0.04% Added +131.9k +131,900
40 UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.01% of their portfolio NEW YORK, NY 175,595175.6k $26.0m $26.0m 0.01% Reduced -150.6k -150,644
41 DEUTSCHE BANK AG\ 0.01% of their portfolio FRANKFURT AM MAIN, 2M 169,436169.4k $25.1m $25.1m 0.01% Added +29.5k +29,535
42 Retirement Systems of Alabama 0.10% of their portfolio MONTGOMERY, AL 152,939152.9k $22.6m $22.6m 0.10% Added +470 +470
43 CANADA PENSION PLAN INVESTMENT BOARD 0.04% of their portfolio TORONTO ONTARIO, A6 150,000150.0k $22.2m $22.2m 0.04% Reduced -168.6k -168,600
44 RHUMBLINE ADVISERS 0.03% of their portfolio BOSTON, MA 146,991147.0k $21.7m $21.7m 0.03% Added +6.2k +6,206
45 MIG Capital, LLC 3.69% of their portfolio NEWPORT BEACH, CA 126,879126.9k $18.8m $18.8m 3.69% New
46 FIRST TRUST ADVISORS LP 0.02% of their portfolio Wheaton, IL 125,321125.3k $18.5m $18.5m 0.02% Added +76.9k +76,928
47 NEUBERGER BERMAN GROUP LLC 0.02% of their portfolio NEW YORK, NY 123,939123.9k $18.3m $18.3m 0.02% Reduced -378.3k -378,251
48 CITIGROUP INC 0.02% of their portfolio NEW YORK, NY 119,151119.2k $17.6m $17.6m 0.02% Reduced -504.7k -504,700
49 Montanaro Asset Management Ltd 2.86% of their portfolio LONDON, X0 118,750118.8k $17.6m $17.6m 2.86% Added +2.2k +2,250
50 Amundi 0.01% of their portfolio Paris, I0 114,508114.5k $18.0m $18.0m 0.01% Added +8.9k +8,938
51 Balyasny Asset Management L.P. 0.06% of their portfolio Chicago, IL 114,336114.3k $16.9m $16.9m 0.06% Added +97.8k +97,831
52 California Public Employees Retirement System 0.01% of their portfolio Sacramento, CA 110,514110.5k $16.4m $16.4m 0.01% Reduced -2.8k -2,835
53 Invesco Ltd. 0.00% of their portfolio ATLANTA, GA 101,277101.3k $15.0m $15.0m 0.00% Reduced -29.7k -29,664
54 Nuveen Asset Management, LLC 0.01% of their portfolio CHICAGO, IL 101,207101.2k $15.0m $15.0m 0.01% Reduced -7.0k -7,038
55 UBS Group AG 0.01% of their portfolio ZURICH, V8 96,65596.7k $14.3m $14.3m 0.01% Added +7.3k +7,256
56 BAILLIE GIFFORD & CO 0.01% of their portfolio EDINBURGH, X0 96,13596.1k $14.2m $14.2m 0.01% Added +2.5k +2,501
57 BNP PARIBAS FINANCIAL MARKETS 0.04% of their portfolio PARIS, I0 95,52895.5k $14.1m $14.1m 0.04% Reduced -72.4k -72,378
58 Brookfield Corp /ON/ 0.05% of their portfolio TORONTO, A6 86,95087.0k $12.9m $12.9m 0.05% Added +50.9k +50,924
59 ARROWSTREET CAPITAL, LIMITED PARTNERSHIP 0.02% of their portfolio BOSTON, MA 86,22986.2k $12.8m $12.8m 0.02% Added +327 +327
60 ALLIANCEBERNSTEIN L.P. 0.01% of their portfolio NASHVILLE, TN 85,70085.7k $12.7m $12.7m 0.01% Added +10.1k +10,143
61 CREDIT SUISSE AG/ 0.01% of their portfolio ZURICH, V8 85,66685.7k $12.7m $12.7m 0.01% Added +16.5k +16,493
62 GAMCO INVESTORS, INC. ET AL 0.14% of their portfolio GREENWICH, CT 85,00085.0k $12.6m $12.6m 0.14% Unchanged
63 CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio WEST SACRAMENTO, CA 83,15483.2k $12.3m $12.3m 0.02% Reduced -2.9k -2,853
64 BRITISH COLUMBIA INVESTMENT MANAGEMENT Corp 0.13% of their portfolio VICTORIA, A1 82,91582.9k $12.3m $12.3m 0.13% Reduced -15.7k -15,737
65 Woodline Partners LP 0.16% of their portfolio San Francisco, CA 80,51680.5k $11.9m $11.9m 0.16% Added +63.0k +63,017
66 AMERICAN INTERNATIONAL GROUP, INC. 0.08% of their portfolio New York, NY 75,49175.5k $11.2m $11.2m 0.08% Reduced -952 -952
67 SUSQUEHANNA FUNDAMENTAL INVESTMENTS, LLC 0.18% of their portfolio BALA CYNWYD, PA 72,16072.2k $10.7m $10.7m 0.18% Added +6.7k +6,721
68 AMERIPRISE FINANCIAL INC 0.00% of their portfolio MINNEAPOLIS, MN 70,67070.7k $10.5m $10.5m 0.00% Reduced -51.1k -51,131
69 TWO SIGMA INVESTMENTS, LP 0.03% of their portfolio NEW YORK, NY 67,80867.8k $10.0m $10.0m 0.03% Added +4.9k +4,948
70 ROYAL BANK OF CANADA 0.00% of their portfolio TORONTO, A6 67,23367.2k $9.9m $9.9m 0.00% Reduced -4.1k -4,131
71 NEW YORK STATE COMMON RETIREMENT FUND 0.01% of their portfolio ALBANY, NY 66,43466.4k $9.8m $9.8m 0.01% Added +2.6k +2,635
72 NEW YORK STATE TEACHERS RETIREMENT SYSTEM 0.02% of their portfolio ALBANY, NY 63,45563.5k $9.4m $9.4m 0.02% Reduced -2.3k -2,300
73 Harbor Spring Capital, LLC 3.40% of their portfolio NEW YORK, NY 61,23961.2k $9.1m $9.1m 3.40% New
74 Bridgewater Associates, LP 0.05% of their portfolio Westport, CT 60,56860.6k $9.0m $9.0m 0.05% Reduced -18.1k -18,066
75 Public Sector Pension Investment Board 0.07% of their portfolio MONTREAL, A8 60,00060.0k $8.9m $8.9m 0.07% New
76 ACADIAN ASSET MANAGEMENT LLC 0.04% of their portfolio Boston, MA 59,21859.2k $8.8m $8.8m 0.04% Reduced -51.4k -51,407
77 STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM 0.02% of their portfolio TALLAHASSEE, FL 55,53955.5k $8.2m $8.2m 0.02% Reduced -360 -360
78 BANK OF NOVA SCOTIA 0.02% of their portfolio TORONTO, A6 55,11155.1k $8.2m $8.2m 0.02% Reduced -398.0k -398,039
79 DekaBank Deutsche Girozentrale 0.02% of their portfolio FRANKFURT, 2M 55,10655.1k $7.9m $7.9m 0.02% Reduced -7.8k -7,840
80 MARSHALL WACE, LLP 0.02% of their portfolio LONDON, X0 54,62254.6k $8.1m $8.1m 0.02% Added +23.5k +23,509
81 CANADA LIFE ASSURANCE Co 0.02% of their portfolio WINNIPEG, A2 52,48952.5k $7.8m $7.8m 0.02% Added +3.5k +3,544
82 APG Asset Management N.V. 0.01% of their portfolio Amsterdam, P7 52,00352.0k $7.7m $7.7m 0.01% Added +38.3k +38,275
83 Bell Asset Management Ltd 1.43% of their portfolio Melbourne, C3 51,73251.7k $7.7m $7.7m 1.43% Reduced -48 -48
84 LOGAN CAPITAL MANAGEMENT INC 0.39% of their portfolio Newtown Square, PA 51,51051.5k $7.6m $7.6m 0.39% Reduced -3.7k -3,710
85 Wilmington Savings Fund Society, FSB 0.34% of their portfolio WILMINGTON, DE 50,70450.7k $7.5m $7.5m 0.34% Added +205 +205
86 Allspring Global Investments Holdings, LLC 0.01% of their portfolio CHARLOTTE, NC 49,12549.1k $7.3m $7.3m 0.01% Reduced -53.5k -53,520
87 Point72 Asset Management, L.P. 0.03% of their portfolio STAMFORD, CT 48,50048.5k $7.2m $7.2m 0.03% Reduced -154.6k -154,588
88 MIRABELLA FINANCIAL SERVICES LLP 0.63% of their portfolio London, X0 47,44047.4k $7.0m $7.0m 0.63% Added +40.3k +40,339
89 Mirae Asset Global Investments Co., Ltd. 0.02% of their portfolio SEOUL, M5 44,89544.9k $6.6m $6.6m 0.02% Reduced -20.4k -20,398
90 BARCLAYS PLC 0.01% of their portfolio LONDON, X0 44,00144.0k $6.5m $6.5m 0.01% First filing
91 Asset Management One Co., Ltd. 0.03% of their portfolio TOKYO, M0 43,49243.5k $6.4m $6.4m 0.03% Reduced -3.7k -3,671
92 Cinctive Capital Management LP 0.32% of their portfolio New York, NY 42,31842.3k $6.3m $6.3m 0.32% Added +27.9k +27,896
93 NS Partners Ltd 0.37% of their portfolio LONDON, X0 41,99942.0k $6.2m $6.2m 0.37% Added +53 +53
94 MUTUAL OF AMERICA CAPITAL MANAGEMENT LLC 0.07% of their portfolio New York, NY 39,75439.8k $5.9m $5.9m 0.07% Added +898 +898
95 E. Ohman J:or Asset Management AB 0.26% of their portfolio STOCKHOLM, V7 39,61339.6k $5.9m $5.9m 0.26% Unchanged
96 MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio Toronto, A6 39,15039.1k $5.8m $5.8m 0.00% Reduced -218.0k -218,022
97 VIRGINIA RETIREMENT SYSTEMS ET Al 0.06% of their portfolio RICHMOND, VA 38,90038.9k $5.8m $5.8m 0.06% Added +15.9k +15,900
98 TEACHER RETIREMENT SYSTEM OF TEXAS 0.04% of their portfolio AUSTIN, TX 38,41538.4k $5.7m $5.7m 0.04% Added +30.9k +30,886
99 AMALGAMATED BANK 0.05% of their portfolio NEW YORK, NY 36,77736.8k $5.4m $5.4m 0.05% Added +447 +447
100 ExodusPoint Capital Management, LP 0.08% of their portfolio NEW YORK, NY 36,44336.4k $5.4m $5.4m 0.08% Added +22.9k +22,857