Renaissance Technologies's IBKR Position Overview
Renaissance Technologies (via Renaissance Technologies LLC) currently holds 616,395 shares of Interactive Brokers Group, Inc. (IBKR) worth $39.64 M, representing 0.06% of the portfolio. First purchased in 2013-Q2, this long-term strategic position has been held for 45 quarters.
Based on 13F filings since 2013, Renaissance Technologies has maintained a long-term strategic position in IBKR, representing a significant commitment to this investment thesis. Largest addition occurred in Q2 2021, adding 1.8 M shares. Largest reduction occurred in Q3 2021, reducing 2.23 M shares.
Analysis based on 13F filings available since 2013 Q2
Renaissance Technologies's Interactive Brokers Group (IBKR) Holding Value Over Time
Track share changes against reported price movement
Quarterly Interactive Brokers Group (IBKR) Trades by Renaissance Technologies
| Report Date | Bought/Sold (Sh.) | % Change | Qtr. End Shares | Reported Price |
|---|---|---|---|---|
| Q4 2025 | -347,245 | Reduce 36.03% | 616,395 | $64.31 |
| Q3 2025 | -1.02 M | Reduce 51.31% | 963,640 | $68.81 |
| Q2 2025 | -858,300 | Reduce 30.25% | 1.98 M | $55.41 |
| Q1 2025 | +417,600 | Add 17.26% | 2.84 M | $41.40 |
| Q4 2024 | +903,640 | Add 59.61% | 2.42 M | $44.17 |
| Q3 2024 | +869,600 | Add 134.53% | 1.52 M | $34.84 |
| Q2 2024 | -947,600 | Reduce 59.45% | 646,400 | $30.65 |
| Q1 2024 | +991,200 | Add 164.43% | 1.59 M | $27.93 |
| Q4 2023 | -65,600 | Reduce 9.81% | 602,800 | $20.72 |
| Q3 2023 | -326,400 | Reduce 32.81% | 668,400 | $21.64 |
| Q2 2023 | +145,200 | Add 17.09% | 994,800 | $0.02 |
| Q1 2023 | -190,000 | Reduce 18.28% | 849,600 | $0.02 |
| Q4 2022 | -139,600 | Reduce 11.84% | 1.04 M | $0.02 |
| Q3 2022 | +89,200 | Add 8.18% | 1.18 M | $15.98 |
| Q2 2022 | -19,200 | Reduce 1.73% | 1.09 M | $13.75 |
| Q1 2022 | -805,200 | Reduce 42.06% | 1.11 M | $16.48 |
| Q4 2021 | -198,800 | Reduce 9.41% | 1.91 M | $19.85 |
| Q3 2021 | -2.23 M | Reduce 51.34% | 2.11 M | $15.58 |
| Q2 2021 | +1.8 M | Add 70.65% | 4.34 M | $16.43 |
| Q1 2021 | +355,200 | Add 16.22% | 2.54 M | $18.26 |
| Q4 2020 | +473,600 | Add 27.60% | 2.19 M | $15.23 |
| Q3 2020 | +765,200 | Add 80.48% | 1.72 M | $12.08 |
| Q2 2020 | +950,800 | New Buy | 950,800 | $10.44 |
| Q3 2018 | -1.28 M | Sold Out | 0 | $0.00 |
| Q2 2018 | -392,400 | Reduce 23.47% | 1.28 M | $16.10 |
| Q1 2018 | +382,400 | Add 29.66% | 1.67 M | $16.81 |
| Q4 2017 | +423,912 | Add 48.99% | 1.29 M | $14.80 |
| Q3 2017 | +188,888 | Add 27.93% | 865,288 | $11.26 |
| Q2 2017 | -123,200 | Reduce 15.41% | 676,400 | $9.36 |
| Q1 2017 | +799,600 | New Buy | 799,600 | $8.68 |
| Q4 2016 | -454,400 | Sold Out | 0 | $0.00 |
| Q3 2016 | +142,800 | Add 45.83% | 454,400 | $8.82 |
| Q2 2016 | +311,600 | New Buy | 311,600 | $8.85 |
| Q1 2016 | -299,600 | Sold Out | 0 | $0.00 |
| Q4 2015 | -868,184 | Reduce 74.34% | 299,600 | $10.90 |
| Q3 2015 | +1.17 M | New Buy | 1.17 M | $9.87 |
| Q2 2015 | -144,400 | Sold Out | 0 | $0.00 |
| Q1 2015 | -1.02 M | Reduce 87.55% | 144,400 | $8.50 |
| Q4 2014 | +60,800 | Add 5.53% | 1.16 M | $7.29 |
| Q3 2014 | -644,800 | Reduce 36.98% | 1.1 M | $6.24 |
| Q2 2014 | -344,524 | Reduce 16.50% | 1.74 M | $5.82 |
| Q1 2014 | -451,076 | Reduce 17.76% | 2.09 M | $5.42 |
| Q4 2013 | +763,600 | Add 43.01% | 2.54 M | $6.08 |
| Q3 2013 | +134,800 | Add 8.22% | 1.78 M | $4.69 |
| Q2 2013 | +1.64 M | Add 0.00% | 1.64 M | $3.99 |
Renaissance Technologies's Interactive Brokers Group Investment FAQs
Renaissance Technologies first purchased Interactive Brokers Group, Inc. (IBKR) in Q2 2013, acquiring 1,640,800 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 Interactive Brokers Group, Inc. (IBKR) for 45 quarters since Q2 2013.
Renaissance Technologies's largest addition to Interactive Brokers Group, Inc. (IBKR) was in Q2 2021, adding 4,342,632 shares worth $71.36 M.
According to the latest 13F filing for Q4 2025, Renaissance Technologies's firm, Renaissance Technologies LLC, owns 616,395 shares of Interactive Brokers Group, Inc. (IBKR), valued at approximately $39.64 M.
As of the Q4 2025 filing, Interactive Brokers Group, Inc. (IBKR) represents approximately 0.06% of Renaissance Technologies's publicly disclosed stock portfolio, making it one of their key holdings.
Renaissance Technologies's peak holding in Interactive Brokers Group, Inc. (IBKR) was 4,342,632 shares, as reported at the end of Q2 2021.