Cliff Asness's MASI Position Overview
Cliff Asness (via Aqr Capital Management LLC) currently holds 1.09 M shares of Masimo Corporation (MASI) worth $141.94 M, representing 0.07% of the portfolio. First purchased in 2014-Q4, this long-term strategic position has been held for 42 quarters.
Based on 13F filings since 2013, Cliff Asness has maintained a long-term strategic position in MASI, representing a significant commitment to this investment thesis. Largest addition occurred in Q4 2025, adding 1.06 M shares. Largest reduction occurred in Q3 2019, reducing 398,108 shares.
Analysis based on 13F filings available since 2013 Q2
Cliff Asness's Masimo Corporation (MASI) Holding Value Over Time
Track share changes against reported price movement
Quarterly Masimo Corporation (MASI) Trades by Cliff Asness
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +1.06 M | Add 3416.55% | 1.09 M | $130.06 |
| Q3 2025 | -19,222 | Reduce 38.25% | 31,034 | $143.17 |
| Q2 2025 | +42,114 | Add 517.24% | 50,256 | $168.22 |
| Q1 2025 | +4,700 | Add 136.55% | 8,142 | $160.24 |
| Q4 2024 | -12,774 | Reduce 78.77% | 3,442 | $165.30 |
| Q3 2024 | +16,216 | New Buy | 16,216 | $133.33 |
| Q3 2023 | -5,103 | Sold Out | 0 | $0.00 |
| Q2 2023 | -8,498 | Reduce 62.48% | 5,103 | $164.55 |
| Q1 2023 | +13,601 | New Buy | 13,601 | $180.71 |
| Q4 2022 | -4,009 | Sold Out | 0 | $0.00 |
| Q3 2022 | -387,733 | Reduce 98.98% | 4,009 | $141.18 |
| Q2 2022 | +186,366 | Add 90.74% | 391,742 | $130.67 |
| Q1 2022 | +154,063 | Add 300.24% | 205,376 | $145.54 |
| Q4 2021 | -405 | Reduce 0.78% | 51,313 | $292.77 |
| Q3 2021 | -394 | Reduce 0.76% | 51,718 | $270.72 |
| Q2 2021 | +554 | Add 1.07% | 52,112 | $242.46 |
| Q1 2021 | -1,246 | Reduce 2.36% | 51,558 | $227.18 |
| Q4 2020 | -2,511 | Reduce 4.54% | 52,804 | $265.06 |
| Q3 2020 | -57,998 | Reduce 51.18% | 55,315 | $232.31 |
| Q2 2020 | -114,983 | Reduce 50.37% | 113,313 | $221.97 |
| Q1 2020 | -152,548 | Reduce 40.06% | 228,296 | $177.12 |
| Q4 2019 | -138,556 | Reduce 26.68% | 380,844 | $158.06 |
| Q3 2019 | -398,108 | Reduce 43.39% | 519,400 | $148.11 |
| Q2 2019 | +83,039 | Add 9.95% | 917,508 | $144.42 |
| Q1 2019 | +255,499 | Add 44.13% | 834,469 | $136.69 |
| Q4 2018 | +159,937 | Add 38.17% | 578,970 | $107.37 |
| Q3 2018 | +278,630 | Add 198.45% | 419,033 | $124.54 |
| Q2 2018 | -58,391 | Reduce 29.37% | 140,403 | $97.65 |
| Q1 2018 | -82,953 | Reduce 29.44% | 198,794 | $87.95 |
| Q4 2017 | +23,011 | Add 8.89% | 281,747 | $84.80 |
| Q3 2017 | +86,884 | Add 50.56% | 258,736 | $86.56 |
| Q2 2017 | +34,157 | Add 24.81% | 171,852 | $91.18 |
| Q1 2017 | +462 | Add 0.34% | 137,695 | $93.26 |
| Q4 2016 | +3,352 | Add 2.50% | 137,233 | $67.40 |
| Q3 2016 | +24,184 | Add 22.05% | 133,881 | $59.49 |
| Q2 2016 | +18,722 | Add 20.58% | 109,697 | $52.52 |
| Q1 2016 | +30,436 | Add 50.28% | 90,975 | $41.84 |
| Q4 2015 | +19,050 | Add 45.92% | 60,539 | $41.51 |
| Q3 2015 | +14,942 | Add 56.29% | 41,489 | $38.56 |
| Q2 2015 | +10,247 | Add 62.87% | 26,547 | $38.72 |
| Q1 2015 | -1,700 | Reduce 9.44% | 16,300 | $33.01 |
| Q4 2014 | +18,000 | New Buy | 18,000 | $26.33 |
Cliff Asness's Masimo Corporation Investment FAQs
Cliff Asness first purchased Masimo Corporation (MASI) in Q4 2014, acquiring 18,000 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Cliff Asness has held Masimo Corporation (MASI) for 42 quarters since Q4 2014.
Cliff Asness's largest addition to Masimo Corporation (MASI) was in Q4 2025, adding 1,091,326 shares worth $141.94 M.
According to the latest 13F filing for Q4 2025, Cliff Asness's firm, Aqr Capital Management LLC, owns 1,091,326 shares of Masimo Corporation (MASI), valued at approximately $141.94 M.
As of the Q4 2025 filing, Masimo Corporation (MASI) represents approximately 0.07% of Cliff Asness's publicly disclosed stock portfolio, making it one of their key holdings.
Cliff Asness's peak holding in Masimo Corporation (MASI) was 1,091,326 shares, as reported at the end of Q4 2025.