Joel Greenblatt's MASI Position Overview
Joel Greenblatt (via Gotham Asset Management, LLC) currently holds 342,194 shares of Masimo Corporation (MASI) worth $44.51 M, representing 0.16% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 49 quarters.
Based on 13F filings since 2013, Joel Greenblatt has maintained a long-term strategic position in MASI, representing a significant commitment to this investment thesis. Largest addition occurred in Q4 2025, adding 213,168 shares. Largest reduction occurred in Q4 2017, reducing 62,657 shares.
Analysis based on 13F filings available since 2013 Q2
Joel Greenblatt's Masimo Corporation (MASI) Holding Value Over Time
Track share changes against reported price movement
Quarterly Masimo Corporation (MASI) Trades by Joel Greenblatt
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +213,168 | Add 165.21% | 342,194 | $130.06 |
| Q3 2025 | -36,330 | Reduce 21.97% | 129,026 | $147.55 |
| Q2 2025 | +20,766 | Add 14.36% | 165,356 | $168.22 |
| Q1 2025 | +16,810 | Add 13.16% | 144,590 | $166.60 |
| Q4 2024 | -25,706 | Reduce 16.75% | 127,780 | $165.30 |
| Q3 2024 | +72,727 | Add 90.05% | 153,486 | $133.33 |
| Q2 2024 | +3,661 | Add 4.75% | 80,759 | $125.94 |
| Q1 2024 | -2,958 | Reduce 3.69% | 77,098 | $146.85 |
| Q4 2023 | +74,803 | Add 1424.01% | 80,056 | $117.21 |
| Q3 2023 | -1,709 | Reduce 24.55% | 5,253 | $87.68 |
| Q2 2023 | +1,180 | Add 20.41% | 6,962 | $164.55 |
| Q1 2023 | +881 | Add 17.98% | 5,782 | $184.54 |
| Q4 2022 | +586 | Add 13.58% | 4,901 | $147.95 |
| Q3 2022 | -2,193 | Reduce 33.70% | 4,315 | $141.14 |
| Q2 2022 | -6,812 | Reduce 51.14% | 6,508 | $130.61 |
| Q1 2022 | +11,329 | Add 569.01% | 13,320 | $145.57 |
| Q4 2021 | +700 | Add 54.22% | 1,991 | $292.82 |
| Q3 2021 | -534 | Reduce 29.26% | 1,291 | $270.33 |
| Q2 2021 | +12 | Add 0.66% | 1,825 | $242.19 |
| Q1 2021 | -5 | Reduce 0.28% | 1,813 | $229.45 |
| Q4 2020 | -9 | Reduce 0.49% | 1,818 | $268.43 |
| Q3 2020 | -60 | Reduce 3.18% | 1,827 | $235.91 |
| Q2 2020 | +42 | Add 2.28% | 1,887 | $227.87 |
| Q1 2020 | -10 | Reduce 0.54% | 1,845 | $177.24 |
| Q4 2019 | -6,621 | Reduce 78.11% | 1,855 | $157.95 |
| Q3 2019 | -399 | Reduce 4.50% | 8,476 | $148.77 |
| Q2 2019 | -9,129 | Reduce 50.71% | 8,875 | $148.85 |
| Q1 2019 | -28,212 | Reduce 61.04% | 18,004 | $138.30 |
| Q4 2018 | +35,977 | Add 351.37% | 46,216 | $107.37 |
| Q3 2018 | -34,532 | Reduce 77.13% | 10,239 | $124.52 |
| Q2 2018 | +11,487 | Add 34.51% | 44,771 | $97.65 |
| Q1 2018 | +33,284 | New Buy | 33,284 | $87.94 |
| Q4 2017 | -62,657 | Sold Out | 0 | $0.00 |
| Q3 2017 | +50,913 | Add 433.52% | 62,657 | $86.57 |
| Q2 2017 | -37 | Reduce 0.31% | 11,744 | $91.20 |
| Q1 2017 | -27,652 | Reduce 70.12% | 11,781 | $93.29 |
| Q4 2016 | +11,465 | Add 40.99% | 39,433 | $67.41 |
| Q3 2016 | +13,951 | Add 99.53% | 27,968 | $59.50 |
| Q2 2016 | +213 | Add 1.54% | 14,017 | $52.51 |
| Q1 2016 | +13,804 | New Buy | 13,804 | $41.87 |
| Q2 2015 | -42,408 | Sold Out | 0 | $0.00 |
| Q1 2015 | +42,408 | New Buy | 42,408 | $32.99 |
| Q4 2014 | -55,059 | Sold Out | 0 | $0.00 |
| Q3 2014 | -18,897 | Reduce 25.55% | 55,059 | $21.29 |
| Q2 2014 | +35,280 | Add 91.22% | 73,956 | $23.60 |
| Q1 2014 | -48,212 | Reduce 55.49% | 38,676 | $27.30 |
| Q4 2013 | -7,657 | Reduce 8.10% | 86,888 | $29.23 |
| Q3 2013 | -42,293 | Reduce 30.91% | 94,545 | $26.64 |
| Q2 2013 | +136,839 | Add 0.00% | 136,838 | $21.20 |
Joel Greenblatt's Masimo Corporation Investment FAQs
Joel Greenblatt first purchased Masimo Corporation (MASI) in Q2 2013, acquiring 136,838 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Joel Greenblatt has held Masimo Corporation (MASI) for 49 quarters since Q2 2013.
Joel Greenblatt's largest addition to Masimo Corporation (MASI) was in Q4 2025, adding 342,194 shares worth $44.51 M.
According to the latest 13F filing for Q4 2025, Joel Greenblatt's firm, Gotham Asset Management, LLC, owns 342,194 shares of Masimo Corporation (MASI), valued at approximately $44.51 M.
As of the Q4 2025 filing, Masimo Corporation (MASI) represents approximately 0.16% of Joel Greenblatt's publicly disclosed stock portfolio, making it one of their key holdings.
Joel Greenblatt's peak holding in Masimo Corporation (MASI) was 342,194 shares, as reported at the end of Q4 2025.