Andreas Halvorsen's MASI Position Overview
Andreas Halvorsen (via Viking Global Investors Lp) currently holds 514,340 shares of Masimo Corporation (MASI) worth $66.9 M, representing 0.18% of the portfolio. First purchased in 2025-Q2, this short-term holding has been held for 3 quarters.
Based on 13F filings, Andreas Halvorsen has maintained this position in MASI for several quarters, showing initial confidence in the investment. Largest addition occurred in Q3 2025, adding 306,007 shares. Largest reduction occurred in Q4 2025, reducing 559,093 shares.
Analysis based on 13F filings available since 2013 Q2
Andreas Halvorsen's Masimo Corporation (MASI) Holding Value Over Time
Track share changes against reported price movement
Quarterly Masimo Corporation (MASI) Trades by Andreas Halvorsen
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -559,093 | Reduce 52.08% | 514,340 | $130.06 |
| Q3 2025 | +306,007 | Add 39.87% | 1.07 M | $147.55 |
| Q2 2025 | +767,426 | New Buy | 767,426 | $168.22 |
Andreas Halvorsen's Masimo Corporation Investment FAQs
Andreas Halvorsen first purchased Masimo Corporation (MASI) in Q2 2025, acquiring 767,426 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Andreas Halvorsen has held Masimo Corporation (MASI) for 3 quarters since Q2 2025.
Andreas Halvorsen's largest addition to Masimo Corporation (MASI) was in Q2 2025, adding 767,426 shares worth $129.1 M.
According to the latest 13F filing for Q4 2025, Andreas Halvorsen's firm, Viking Global Investors Lp, owns 514,340 shares of Masimo Corporation (MASI), valued at approximately $66.9 M.
As of the Q4 2025 filing, Masimo Corporation (MASI) represents approximately 0.18% of Andreas Halvorsen's publicly disclosed stock portfolio, making it one of their key holdings.
Andreas Halvorsen's peak holding in Masimo Corporation (MASI) was 1,073,433 shares, as reported at the end of Q3 2025.