Masimo Corp (MASI) Institutional Ownership

Institutions by Trading Activity

Ownership Statistics

54,400,000Shares Outstanding
55,885,941Shares held by institutions
$10,056,674,912Value of institutional holdings
102.73%Institutional ownership %
0.43%Shares Changed QoQ
380No. of institutional investors

Shares Owned by Institutions

Shares Purchased/Sold by Institutions

Ownership Summary

Masimo Corp (NASDAQ:MASI) has 380 institutional investors with active 13F positions as of December 2025.

436 Institutional Holders

55,885,941 Total Shares Held
Download Data
Owner Name Date Shares Held Change (QoQ) Change (%) Value (USD)
BlackRock, Inc. 31 Mar, 2026 4,644,578 -4,211,041 -47.55% $826,131,120.00
Politan Capital Management LP 31 Mar, 2026 4,589,648 0 0.00% $816,360,690.00
Pentwater Capital Management LP 31 Mar, 2026 3,176,000 3,176,000 0.00% $564,915,120.00
Barclays Plc 31 Mar, 2026 2,743,985 2,685,627 4,601.99% $488,072,611.00
HBK INVESTMENTS L P 31 Mar, 2026 2,576,109 2,576,109 0.00% $458,212,508.00
MASSACHUSETTS FINANCIAL SERVICES CO /MA/ 31 Mar, 2026 2,342,790 -321,085 -12.05% $416,692,672.00
VANGUARD CAPITAL MANAGEMENT LLC 31 Mar, 2026 2,050,045 2,050,045 0.00% $364,641,504.00
VANGUARD PORTFOLIO MANAGEMENT LLC 31 Mar, 2026 2,006,861 2,006,861 0.00% $356,960,366.00
FMR LLC 31 Mar, 2026 1,450,823 -6,413,341 -81.55% $258,057,947.00
State Street Corp 31 Mar, 2026 1,437,724 22,528 1.59% $255,727,968.00
MILLENNIUM MANAGEMENT LLC 31 Mar, 2026 988,853 800,888 426.08% $175,887,283.00
Goldman Sachs Group Inc 31 Mar, 2026 984,192 -289,204 -22.71% $175,058,231.00
GEODE CAPITAL MANAGEMENT, LLC 31 Mar, 2026 956,736 2,760 0.29% $170,210,661.00
AQR CAPITAL MANAGEMENT LLC 31 Mar, 2026 831,966 -259,360 -23.77% $147,399,452.00
BALYASNY ASSET MANAGEMENT L.P. 31 Mar, 2026 770,986 770,986 0.00% $137,135,280.00
Morgan Stanley 31 Mar, 2026 752,417 -168,318 -18.28% $133,832,703.00
Liontrust Investment Partners LLP 31 Mar, 2026 627,796 0 0.00% $81,651,148.00
Jpmorgan Chase & Co 31 Mar, 2026 572,645 454,847 386.12% $101,541,410.00
Citigroup Inc 31 Mar, 2026 533,388 412,157 339.98% $94,873,724.00
SG Americas Securities, LLC 31 Mar, 2026 522,824 506,395 3,082.32% $92,995.00