Cliff Asness's MKTX Position Overview
Cliff Asness (via Aqr Capital Management LLC) currently holds 2.56 M shares of MarketAxess Holdings Inc. (MKTX) worth $463.66 M, representing 0.24% of the portfolio. First purchased in 2012-Q4, this long-term strategic position has been held for 53 quarters.
Based on 13F filings since 2013, Cliff Asness has maintained a long-term strategic position in MKTX, representing a significant commitment to this investment thesis. Largest addition occurred in Q4 2025, adding 1.61 M shares. Largest reduction occurred in Q3 2017, reducing 168,359 shares.
Analysis based on 13F filings available since 2013 Q2
Cliff Asness's MarketAxess Holdings (MKTX) Holding Value Over Time
Track share changes against reported price movement
Quarterly MarketAxess Holdings (MKTX) Trades by Cliff Asness
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | +1.61 M | Add 168.97% | 2.56 M | $181.25 |
| Q3 2025 | +192,626 | Add 25.40% | 951,088 | $174.25 |
| Q2 2025 | +628,954 | Add 485.65% | 758,462 | $220.44 |
| Q1 2025 | +35,303 | Add 37.47% | 129,508 | $216.35 |
| Q4 2024 | +79,178 | Add 526.90% | 94,205 | $226.04 |
| Q3 2024 | -4,237 | Reduce 21.99% | 15,027 | $256.20 |
| Q2 2024 | -1,255 | Reduce 6.12% | 19,264 | $200.53 |
| Q1 2024 | -19,914 | Reduce 49.25% | 20,519 | $219.25 |
| Q4 2023 | -1,560 | Reduce 3.71% | 40,433 | $292.85 |
| Q3 2023 | +28,600 | Add 213.54% | 41,993 | $210.42 |
| Q2 2023 | +2,557 | Add 23.60% | 13,393 | $261.42 |
| Q1 2023 | -11,182 | Reduce 50.79% | 10,836 | $387.47 |
| Q4 2022 | -14,734 | Reduce 40.09% | 22,018 | $278.89 |
| Q3 2022 | +29,615 | Add 414.95% | 36,752 | $222.49 |
| Q2 2022 | +260 | Add 3.78% | 7,137 | $255.99 |
| Q1 2022 | +488 | Add 7.64% | 6,877 | $340.26 |
| Q4 2021 | -8,012 | Reduce 55.64% | 6,389 | $411.33 |
| Q3 2021 | -3,359 | Reduce 18.91% | 14,401 | $420.67 |
| Q2 2021 | -14,435 | Reduce 44.84% | 17,760 | $463.57 |
| Q1 2021 | -983 | Reduce 2.96% | 32,195 | $497.93 |
| Q4 2020 | +2,270 | Add 7.34% | 33,178 | $563.42 |
| Q3 2020 | +3,684 | Add 13.53% | 30,908 | $481.59 |
| Q2 2020 | +116 | Add 0.43% | 27,224 | $500.00 |
| Q1 2020 | -1,420 | Reduce 4.98% | 27,108 | $332.56 |
| Q4 2019 | +10,324 | Add 56.71% | 28,528 | $379.10 |
| Q3 2019 | -47,568 | Reduce 72.32% | 18,204 | $324.82 |
| Q2 2019 | +3,676 | Add 5.92% | 65,772 | $321.41 |
| Q1 2019 | -1,992 | Reduce 3.11% | 62,096 | $246.09 |
| Q4 2018 | +23,347 | Add 57.31% | 64,088 | $211.30 |
| Q3 2018 | -3,175 | Reduce 7.23% | 40,741 | $178.49 |
| Q2 2018 | -7,871 | Reduce 15.20% | 43,916 | $197.85 |
| Q1 2018 | -481 | Reduce 0.92% | 51,787 | $217.45 |
| Q4 2017 | -67,889 | Reduce 56.50% | 52,268 | $201.75 |
| Q3 2017 | -168,359 | Reduce 58.35% | 120,157 | $184.51 |
| Q2 2017 | -51,281 | Reduce 15.09% | 288,516 | $201.10 |
| Q1 2017 | +50,467 | Add 17.44% | 339,797 | $187.49 |
| Q4 2016 | +163,585 | Add 130.09% | 289,330 | $146.92 |
| Q3 2016 | +42,876 | Add 51.74% | 125,745 | $165.59 |
| Q2 2016 | +24,190 | Add 41.22% | 82,869 | $145.40 |
| Q1 2016 | +33,482 | Add 132.88% | 58,679 | $124.83 |
| Q4 2015 | +15,012 | Add 147.39% | 25,197 | $111.60 |
| Q3 2015 | -3,535 | Reduce 25.77% | 10,185 | $92.88 |
| Q2 2015 | +3,868 | Add 39.26% | 13,720 | $92.78 |
| Q1 2015 | +3,300 | Add 50.37% | 9,852 | $82.93 |
| Q4 2014 | -22,100 | Reduce 77.13% | 6,552 | $71.73 |
| Q3 2014 | -39,000 | Reduce 57.65% | 28,652 | $61.85 |
| Q2 2014 | +36,400 | Add 116.47% | 67,652 | $54.06 |
| Q1 2014 | -2,100 | Reduce 6.30% | 31,252 | $59.23 |
| Q4 2013 | +12,304 | Add 58.46% | 33,352 | $66.86 |
| Q3 2013 | +10,900 | Add 107.41% | 21,048 | $60.05 |
| Q2 2013 | +10,148 | Add 0.00% | 10,148 | $46.71 |
| Q4 2012 | +14,248 | Add 0.00% | 14,248 | $35.30 |
Cliff Asness's MarketAxess Holdings Investment FAQs
Cliff Asness first purchased MarketAxess Holdings Inc. (MKTX) in Q4 2012, acquiring 14,248 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 MarketAxess Holdings Inc. (MKTX) for 53 quarters since Q4 2012.
Cliff Asness's largest addition to MarketAxess Holdings Inc. (MKTX) was in Q4 2025, adding 2,558,097 shares worth $463.66 M.
According to the latest 13F filing for Q4 2025, Cliff Asness's firm, Aqr Capital Management LLC, owns 2,558,097 shares of MarketAxess Holdings Inc. (MKTX), valued at approximately $463.66 M.
As of the Q4 2025 filing, MarketAxess Holdings Inc. (MKTX) represents approximately 0.24% of Cliff Asness's publicly disclosed stock portfolio, making it one of their key holdings.
Cliff Asness's peak holding in MarketAxess Holdings Inc. (MKTX) was 2,558,097 shares, as reported at the end of Q4 2025.