MASI — MASIMO CORP

Ownership history in Birchview Capital, LP  ·  45 quarters on record

This page tracks every 13F SEC filing in which Birchview Capital, LP 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
2.21% (2023 Q1)
Avg. % of fund
1.13%
First filed
2014 Q4
Last filed
2025 Q4
Quarters held
45
Quarter Action Shares Change Chg % % of Fund Mkt Value Price (EOQ)
2025 Q4 UNCHANGED 8,280 — 0% 0.63% $1.1M $130.06
2025 Q3 UNCHANGED 8,280 — 0% 0.92% $1.2M $147.55
2025 Q2 REDUCED 8,280 -3,000 -26.6% 1.38% $1.4M $168.22
2025 Q1 REDUCED 11,280 -4,000 -26.2% 1.63% $1.9M $166.60
41 older quarters hidden  —  Sign in free or upgrade to Premium to see full history
% 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% nVerses Capital, LLC 0.6%
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