MASI — MASIMO CORP

Ownership history in Ace Management Global Ltd.  ·  4 quarters on record

This page tracks every 13F SEC filing in which Ace Management Global Ltd. reported a position in MASIMO CORP (MASI). Data includes quarterly share count, position size as % of portfolio, estimated market value, and end-of-quarter stock price — sourced directly from SEC EDGAR 13F filings.

Peak position
100.0% (2024 Q4)
Avg. % of fund
69.41%
First filed
2024 Q2
Last filed
2025 Q1
Quarters held
4
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q1 UNCHANGED 47,694 — 0% 100.00% $7.9M $166.60
2024 Q4 REDUCED 47,694 -917,810 -95.1% 100.00% $7.9M $165.30
2024 Q3 REDUCED 965,504 -95,415 -9.0% 38.42% $128.7M $133.33
2024 Q2 INITIATED 1,060,919 — — 39.24% $133.6M —
% of Fund (quarterly)    MASI price (monthly, adj. close)

Other funds also holding MASI

As of 2025 Q4 — sorted by position size

Politan Capital Management LP 3Y 71.01% NAYA CAPITAL MANAGEMENT UK LTD 3Y 7Y 15.28% LOCKERMAN FINANCIAL GROUP, INC. 3Y 2.94% Parkman Healthcare Partners LLC 3Y 2.48% WILSON ASSET MANAGEMENT (INTERNATIONAL) PTY LTD 3Y 1.32% Alpha Wave Global, LP 3Y 7Y 1.2% RTW INVESTMENTS, LP 3Y 7Y 0.89% WESTFIELD CAPITAL MANAGEMENT CO LP 3Y 7Y 0.82% LECAP ASSET MANAGEMENT LTD 0.68% Birchview Capital, LP 3Y 7Y 0.63%
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