Mario Gabelli's MASI Position Overview
Mario Gabelli (via Gamco Investors, Inc. Et Al) currently holds 83,000 shares of Masimo Corporation (MASI) worth $10.79 M, representing 0.10% of the portfolio. First purchased in 2013-Q4, this long-term strategic position has been held for 49 quarters.
Based on 13F filings since 2013, Mario Gabelli has maintained a long-term strategic position in MASI, representing a significant commitment to this investment thesis. Largest addition occurred in Q1 2014, adding 56,000 shares. Largest reduction occurred in Q3 2018, reducing 6,000 shares.
Analysis based on 13F filings available since 2013 Q2
Mario Gabelli's Masimo Corporation (MASI) Holding Value Over Time
Track share changes against reported price movement
Quarterly Masimo Corporation (MASI) Trades by Mario Gabelli
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -800 | Reduce 0.95% | 83,000 | $130.06 |
| Q3 2025 | -700 | Reduce 0.83% | 83,800 | $147.55 |
| Q2 2023 | -500 | Reduce 0.59% | 84,500 | $164.55 |
| Q1 2022 | -2,500 | Reduce 2.86% | 85,000 | $145.54 |
| Q4 2021 | -1,000 | Reduce 1.13% | 87,500 | $292.78 |
| Q3 2021 | -1,000 | Reduce 1.12% | 88,500 | $270.71 |
| Q2 2021 | -500 | Reduce 0.56% | 89,500 | $242.45 |
| Q1 2021 | -2,000 | Reduce 2.17% | 90,000 | $229.66 |
| Q4 2020 | -2,000 | Reduce 2.13% | 92,000 | $268.38 |
| Q3 2020 | -1,000 | Reduce 1.05% | 94,000 | $236.06 |
| Q2 2020 | -4,000 | Reduce 4.04% | 95,000 | $227.99 |
| Q1 2020 | -3,000 | Reduce 2.94% | 99,000 | $177.12 |
| Q4 2019 | -1,500 | Reduce 1.45% | 102,000 | $158.06 |
| Q3 2019 | -4,500 | Reduce 4.17% | 103,500 | $148.79 |
| Q1 2019 | -1,000 | Reduce 0.92% | 108,000 | $138.28 |
| Q4 2018 | -3,000 | Reduce 2.68% | 109,000 | $107.37 |
| Q3 2018 | -6,000 | Reduce 5.08% | 112,000 | $124.54 |
| Q2 2018 | -4,000 | Reduce 3.28% | 118,000 | $97.65 |
| Q1 2018 | -500 | Reduce 0.41% | 122,000 | $87.95 |
| Q4 2017 | -2,500 | Reduce 2.00% | 122,500 | $84.80 |
| Q3 2017 | -5,000 | Reduce 3.85% | 125,000 | $86.56 |
| Q4 2016 | -200 | Reduce 0.15% | 130,000 | $67.40 |
| Q2 2016 | -1,200 | Reduce 0.91% | 130,200 | $52.51 |
| Q1 2016 | -600 | Reduce 0.45% | 131,400 | $41.84 |
| Q4 2015 | -2,000 | Reduce 1.49% | 132,000 | $41.51 |
| Q4 2014 | +9,000 | Add 7.20% | 134,000 | $26.34 |
| Q3 2014 | +3,000 | Add 2.46% | 125,000 | $21.28 |
| Q2 2014 | +32,000 | Add 35.56% | 122,000 | $23.60 |
| Q1 2014 | +56,000 | Add 164.71% | 90,000 | $27.31 |
| Q4 2013 | +34,000 | New Buy | 34,000 | $29.24 |
Mario Gabelli's Masimo Corporation Investment FAQs
Mario Gabelli first purchased Masimo Corporation (MASI) in Q4 2013, acquiring 34,000 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Mario Gabelli has held Masimo Corporation (MASI) for 49 quarters since Q4 2013.
Mario Gabelli's largest addition to Masimo Corporation (MASI) was in Q1 2014, adding 90,000 shares worth $2.46 M.
According to the latest 13F filing for Q4 2025, Mario Gabelli's firm, Gamco Investors, Inc. Et Al, owns 83,000 shares of Masimo Corporation (MASI), valued at approximately $10.79 M.
As of the Q4 2025 filing, Masimo Corporation (MASI) represents approximately 0.10% of Mario Gabelli's publicly disclosed stock portfolio, making it one of their key holdings.
Mario Gabelli's peak holding in Masimo Corporation (MASI) was 134,000 shares, as reported at the end of Q4 2014.