Renaissance Technologies's MASI Position Overview
Renaissance Technologies (via Renaissance Technologies LLC) currently holds 59,900 shares of Masimo Corporation (MASI) worth $7.79 M, representing 0.01% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 43 quarters.
Based on 13F filings since 2013, Renaissance Technologies has maintained a long-term strategic position in MASI, representing a significant commitment to this investment thesis. Largest addition occurred in Q2 2014, adding 262,235 shares. Largest reduction occurred in Q3 2013, reducing 396,600 shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies's Masimo Corporation (MASI) Holding Value Over Time
Track share changes against reported price movement
Quarterly Masimo Corporation (MASI) Trades by Renaissance Technologies
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +59,900 | New Buy | 59,900 | $130.06 |
| Q3 2025 | -25,377 | Sold Out | 0 | $0.00 |
| Q2 2025 | +10,377 | Add 69.18% | 25,377 | $168.22 |
| Q1 2025 | +15,000 | New Buy | 15,000 | $166.60 |
| Q3 2023 | -41,230 | Sold Out | 0 | $0.00 |
| Q2 2023 | -40,070 | Reduce 49.29% | 41,230 | $0.16 |
| Q1 2023 | -98,400 | Reduce 54.76% | 81,300 | $0.18 |
| Q4 2022 | +131,900 | Add 275.94% | 179,700 | $0.15 |
| Q3 2022 | +47,800 | New Buy | 47,800 | $141.15 |
| Q1 2022 | -6,200 | Sold Out | 0 | $0.00 |
| Q4 2021 | +6,200 | New Buy | 6,200 | $292.74 |
| Q2 2021 | -1,100 | Sold Out | 0 | $0.00 |
| Q1 2021 | +1,100 | New Buy | 1,100 | $230.00 |
| Q4 2020 | -82,600 | Sold Out | 0 | $0.00 |
| Q3 2020 | +67,700 | Add 454.36% | 82,600 | $236.07 |
| Q2 2020 | -4,100 | Reduce 21.58% | 14,900 | $227.99 |
| Q1 2020 | -7,021 | Reduce 26.98% | 19,000 | $177.11 |
| Q4 2019 | -78,679 | Reduce 75.15% | 26,021 | $158.06 |
| Q3 2019 | -169,300 | Reduce 61.79% | 104,700 | $148.79 |
| Q2 2019 | -71,000 | Reduce 20.58% | 274,000 | $148.82 |
| Q1 2019 | -193,300 | Reduce 35.91% | 345,000 | $138.28 |
| Q4 2018 | +235,500 | Add 77.77% | 538,300 | $107.37 |
| Q3 2018 | -249,826 | Reduce 45.21% | 302,800 | $124.54 |
| Q2 2018 | +41,126 | Add 8.04% | 552,626 | $97.65 |
| Q1 2018 | -40,600 | Reduce 7.35% | 511,500 | $87.95 |
| Q4 2017 | -131,300 | Reduce 19.21% | 552,100 | $84.80 |
| Q3 2017 | +62,900 | Add 10.14% | 683,400 | $86.56 |
| Q2 2017 | +191,400 | Add 44.60% | 620,500 | $91.18 |
| Q1 2017 | +255,700 | Add 147.46% | 429,100 | $93.26 |
| Q4 2016 | +94,900 | Add 120.89% | 173,400 | $67.40 |
| Q3 2016 | -65,300 | Reduce 45.41% | 78,500 | $59.49 |
| Q2 2016 | -88,900 | Reduce 38.20% | 143,800 | $52.52 |
| Q1 2016 | +10,300 | Add 4.63% | 232,700 | $41.84 |
| Q4 2015 | +109,200 | Add 96.47% | 222,400 | $41.51 |
| Q3 2015 | -42,400 | Reduce 27.25% | 113,200 | $38.56 |
| Q2 2015 | +12,900 | Add 9.04% | 155,600 | $38.74 |
| Q1 2015 | +42,600 | Add 42.56% | 142,700 | $32.98 |
| Q4 2014 | -236,100 | Reduce 70.23% | 100,100 | $26.34 |
| Q3 2014 | +73,965 | Add 28.21% | 336,200 | $21.28 |
| Q2 2014 | +262,235 | New Buy | 262,235 | $23.60 |
| Q4 2013 | -60,600 | Sold Out | 0 | $0.00 |
| Q3 2013 | -396,600 | Reduce 86.75% | 60,600 | $26.63 |
| Q2 2013 | +457,200 | Add 0.00% | 457,200 | $21.20 |
Renaissance Technologies's Masimo Corporation Investment FAQs
Renaissance Technologies first purchased Masimo Corporation (MASI) in Q2 2013, acquiring 457,200 shares, as reported in their 13F filing for that period. Note: Analysis reflects filings available since Q2 2013; earlier records may be incomplete.
Renaissance Technologies has held Masimo Corporation (MASI) for 43 quarters since Q2 2013.
Renaissance Technologies's largest addition to Masimo Corporation (MASI) was in Q2 2013, adding 457,200 shares worth $9.69 M.
According to the latest 13F filing for Q4 2025, Renaissance Technologies's firm, Renaissance Technologies LLC, owns 59,900 shares of Masimo Corporation (MASI), valued at approximately $7.79 M.
As of the Q4 2025 filing, Masimo Corporation (MASI) represents approximately 0.01% of Renaissance Technologies's publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies's peak holding in Masimo Corporation (MASI) was 683,400 shares, as reported at the end of Q3 2017.