Cliff Asness's MKSI Position Overview
Cliff Asness (via Aqr Capital Management LLC) currently holds 616,497 shares of MKS Inc. (MKSI) worth $136.86 M, representing 0.06% of the portfolio. First purchased in 2012-Q4, this long-term strategic position has been held for 54 quarters.
Based on 13F filings since 2013, Cliff Asness has maintained a long-term strategic position in MKSI, representing a significant commitment to this investment thesis. Largest addition occurred in Q1 2026, adding 419,835 shares. Largest reduction occurred in Q2 2019, reducing 631,934 shares.
Analysis based on 13F filings available since 2013 Q2
Cliff Asness's MKS (MKSI) Holding Value Over Time
Track share changes against reported price movement
Quarterly MKS (MKSI) Trades by Cliff Asness
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q1 2026 | +419,835 | Add 213.48% | 616,497 | $222.00 |
| Q4 2025 | +26,665 | Add 15.69% | 196,662 | $159.80 |
| Q3 2025 | -15,050 | Reduce 8.13% | 169,997 | $122.88 |
| Q2 2025 | +114,836 | Add 163.56% | 185,047 | $99.36 |
| Q1 2025 | +11,403 | Add 19.39% | 70,211 | $78.83 |
| Q4 2024 | -76,124 | Reduce 56.42% | 58,808 | $104.39 |
| Q3 2024 | +100,602 | Add 293.04% | 134,932 | $108.71 |
| Q2 2024 | +14,729 | Add 75.14% | 34,330 | $130.58 |
| Q1 2024 | +11,257 | Add 134.91% | 19,601 | $131.38 |
| Q4 2023 | +4,739 | Add 131.46% | 8,344 | $102.87 |
| Q3 2023 | +3,605 | New Buy | 3,605 | $86.54 |
| Q2 2023 | -5,590 | Sold Out | 0 | $0.00 |
| Q1 2023 | -21,784 | Reduce 79.58% | 5,590 | $88.02 |
| Q4 2022 | -216,287 | Reduce 88.77% | 27,374 | $83.67 |
| Q3 2022 | -4,565 | Reduce 1.84% | 243,661 | $82.64 |
| Q2 2022 | +79,332 | Add 46.97% | 248,226 | $100.05 |
| Q1 2022 | +54,553 | Add 47.71% | 168,894 | $150.00 |
| Q4 2021 | -25,434 | Reduce 18.20% | 114,341 | $174.17 |
| Q3 2021 | +4,025 | Add 2.97% | 139,775 | $150.91 |
| Q2 2021 | -25,174 | Reduce 15.64% | 135,750 | $177.95 |
| Q1 2021 | +24,451 | Add 17.92% | 160,924 | $185.42 |
| Q4 2020 | -41,396 | Reduce 23.27% | 136,473 | $150.45 |
| Q3 2020 | +102,005 | Add 134.46% | 177,869 | $109.23 |
| Q2 2020 | +16,623 | Add 28.06% | 75,864 | $112.06 |
| Q1 2020 | -67,443 | Reduce 53.24% | 59,241 | $81.45 |
| Q4 2019 | -99,442 | Reduce 43.98% | 126,684 | $110.01 |
| Q3 2019 | -313,681 | Reduce 58.11% | 226,126 | $92.28 |
| Q2 2019 | -631,934 | Reduce 53.93% | 539,807 | $77.89 |
| Q1 2019 | +128,139 | Add 12.28% | 1.17 M | $91.26 |
| Q4 2018 | +187,948 | Add 21.97% | 1.04 M | $64.61 |
| Q3 2018 | +352,301 | Add 69.99% | 855,654 | $80.15 |
| Q2 2018 | +321,368 | Add 176.59% | 503,353 | $95.70 |
| Q1 2018 | +61,377 | Add 50.89% | 181,985 | $115.65 |
| Q4 2017 | +9,943 | Add 8.98% | 120,608 | $94.50 |
| Q3 2017 | +36,512 | Add 49.24% | 110,665 | $94.46 |
| Q2 2017 | +18,191 | Add 32.51% | 74,153 | $67.29 |
| Q1 2017 | -5,015 | Reduce 8.22% | 55,962 | $68.74 |
| Q4 2016 | +960 | Add 1.60% | 60,977 | $59.40 |
| Q3 2016 | -17,259 | Reduce 22.33% | 60,017 | $49.74 |
| Q2 2016 | +3,239 | Add 4.37% | 77,276 | $43.07 |
| Q1 2016 | +42,404 | Add 134.05% | 74,037 | $37.64 |
| Q4 2015 | -5,118 | Reduce 13.93% | 31,633 | $36.01 |
| Q3 2015 | -10,223 | Reduce 21.76% | 36,751 | $33.52 |
| Q2 2015 | -15,135 | Reduce 24.37% | 46,974 | $37.94 |
| Q1 2015 | -48,826 | Reduce 44.01% | 62,109 | $33.81 |
| Q4 2014 | -45,400 | Reduce 29.04% | 110,935 | $36.60 |
| Q3 2014 | -107,343 | Reduce 40.71% | 156,335 | $33.38 |
| Q2 2014 | -97,297 | Reduce 26.95% | 263,678 | $31.24 |
| Q1 2014 | -85,322 | Reduce 19.12% | 360,975 | $29.89 |
| Q4 2013 | -150,623 | Reduce 25.23% | 446,297 | $29.94 |
| Q3 2013 | -208,017 | Reduce 25.84% | 596,920 | $26.59 |
| Q2 2013 | +804,937 | Add 0.00% | 804,937 | $26.54 |
| Q4 2012 | +951,479 | Add 0.00% | 951,479 | $25.78 |
Cliff Asness's MKS Investment FAQs
Cliff Asness first purchased MKS Inc. (MKSI) in Q4 2012, acquiring 951,479 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 MKS Inc. (MKSI) for 54 quarters since Q4 2012.
Cliff Asness's largest addition to MKS Inc. (MKSI) was in Q4 2012, adding 951,479 shares worth $24.53 M.
According to the latest 13F filing for Q1 2026, Cliff Asness's firm, Aqr Capital Management LLC, owns 616,497 shares of MKS Inc. (MKSI), valued at approximately $136.86 M.
As of the Q1 2026 filing, MKS Inc. (MKSI) represents approximately 0.06% of Cliff Asness's publicly disclosed stock portfolio, making it one of their key holdings.
Cliff Asness's peak holding in MKS Inc. (MKSI) was 1,171,741 shares, as reported at the end of Q1 2019.