Ancient Art, L.P.: INTERACTIVE BROKERS GROUP IN (IBKR): Quarterly 13F Position History
As of Q1 2026, Ancient Art, L.P. reported 1,285,193 shares of INTERACTIVE BROKERS GROUP IN (IBKR), worth $86.2M and representing 18.8% of its 13F equity book. Quarter-over-quarter share count change: 358,443 (-21.8%) . The position first appeared in Q2 2016 and has been disclosed across 40 13F-HR filings in Pactolio's tracked window.
- 1,285,193Shares Held (Latest Filing)
- $86.2MReported Market Value (Latest Filing)
- 18.8%Portfolio Weight (% of 13F Equity Book)
- 358,443Quarter-over-Quarter Share Change
- -$19.5MQuarter-over-Quarter Value Change
- 3,410,316Peak Reported Shares (Historical)
Quarterly 13F-HR Disclosure History Source: SEC 13F-HR filings, 40 quarter s
| Quarter | Shares | QoQ Share Change | Share Change (%) | Market Value | Weight | Implied Price |
|---|---|---|---|---|---|---|
| Q1 2026 | 1,285,193 | 358,443 | -21.8% | $86.2M | 18.8% | $67.1 |
| Q4 2025 | 1,643,636 | 0 | — | $105.7M | 23.9% | $64.3 |
| Q3 2025 | 1,643,636 | 0 | — | $113.1M | 27.2% | $68.8 |
| Q2 2025 | 1,643,636 | +1,232,727 | +300.0% | $91.1M | 29.4% | $55.4 |
| Q1 2025 | 410,909 | 35,000 | -7.8% | $68.0M | 20.2% | $165.6 |
| Q4 2024 | 445,909 | 10,455 | -2.3% | $78.8M | 16.8% | $176.7 |
| Q3 2024 | 456,364 | 68,810 | -13.1% | $63.6M | 14.7% | $139.4 |
| Q2 2024 | 525,174 | 25,000 | -4.5% | $64.4M | 16.5% | $122.6 |
| Q1 2024 | 550,174 | 0 | — | $61.5M | 12.4% | $111.7 |
| Q4 2023 | 550,174 | 0 | — | $45.6M | 7.6% | $82.9 |
| Q3 2023 | 550,174 | 28,204 | -4.9% | $47.6M | 10.2% | $86.6 |
| Q2 2023 | 578,378 | 0 | — | $48.0M | 10.2% | $83.1 |
| Q1 2023 | 578,378 | 431,971 | -42.8% | $47.8M | 10.4% | $82.6 |
| Q4 2022 | 1,010,349 | 50,000 | -4.7% | $73.1M | 15.5% | $72.3 |
| Q3 2022 | 1,060,349 | +50,000 | +4.9% | $67.8M | 12.6% | $63.9 |
| Q2 2022 | 1,010,349 | 0 | — | $55.6M | 8.5% | $55.0 |
| Q1 2022 | 1,010,349 | 125,651 | -11.1% | $66.6M | 8.7% | $65.9 |
| Q4 2021 | 1,136,000 | 599,593 | -34.5% | $90.2M | 10.2% | $79.4 |
| Q3 2021 | 1,735,593 | 0 | — | $108.2M | 11.4% | $62.3 |
| Q2 2021 | 1,735,593 | 52,380 | -2.9% | $114.1M | 10.7% | $65.7 |
| Q1 2021 | 1,787,973 | 101,942 | -5.4% | $130.6M | 12.7% | $73.0 |
| Q4 2020 | 1,889,915 | 0 | — | $115.1M | 11.3% | $60.9 |
| Q3 2020 | 1,889,915 | 1,658 | -0.1% | $91.3M | 12.5% | $48.3 |
| Q2 2020 | 1,891,573 | 0 | — | $79.0M | 14.5% | $41.8 |
| Q1 2020 | 1,891,573 | +272,300 | +16.8% | $81.7M | 13.2% | $43.2 |
| Q4 2019 | 1,619,273 | 0 | — | $75.5M | 11.2% | $46.6 |
| Q3 2019 | 1,619,273 | 0 | — | $87.1M | 14.4% | $53.8 |
| Q2 2019 | 1,619,273 | 0 | — | $87.8M | 13.9% | $54.2 |
| Q1 2019 | 1,619,273 | 500 | -0.0% | $84.0M | 15.3% | $51.9 |
| Q4 2018 | 1,619,773 | +150,457 | +10.2% | $88.5M | 17.8% | $54.7 |
| Q3 2018 | 1,469,316 | +59,996 | +4.3% | $81.3M | 16.1% | $55.3 |
| Q2 2018 | 1,409,320 | 577,293 | -29.1% | $90.8M | 17.1% | $64.4 |
| Q1 2018 | 1,986,613 | 415,184 | -17.3% | $133.6M | 26.7% | $67.2 |
| Q4 2017 | 2,401,797 | 1,008,519 | -29.6% | $142.2M | 27.6% | $59.2 |
| Q3 2017 | 3,410,316 | 0 | — | $153.6M | 28.8% | $45.0 |
| Q2 2017 | 3,410,316 | +101,121 | +3.1% | $127.6M | 21.9% | $37.4 |
| Q1 2017 | 3,309,195 | +7,943 | +0.2% | $114.9M | 19.8% | $34.7 |
| Q4 2016 | 3,301,252 | 17,121 | -0.5% | $120.5M | 18.5% | $36.5 |
| Q3 2016 | 3,318,373 | 0 | — | $117.0M | 21.4% | $35.3 |
| Q2 2016 | 3,318,373 | — | — | $117.5M | 20.9% | $35.4 |
Methodology & FAQ
How This Position History Is Sourced
Each row is one SEC Form 13F-HR filing disclosing this position. Share count, market value, and reported quarter are taken verbatim from the filing; portfolio weight is recomputed against the same filing's total reported equity book. Implied price-per-share is market value divided by shares — a quarter-end mark, not the manager's cost basis. See the full methodology document for the normalization rules.
When did Ancient Art, L.P. first disclose a IBKR position in 13F-HR filings?
Ancient Art, L.P. first reported INTERACTIVE BROKERS GROUP IN (IBKR) on its 13F-HR filing for the period ending 2016-06-30 (Q2 2016). The position has appeared on 40 reported quarters within Pactolio's tracked window.
What was Ancient Art, L.P.'s most recent quarter-over-quarter share-count change in IBKR?
Between Q4 2025 and Q1 2026, Ancient Art, L.P. reduced its IBKR position by 358,443 shares (-21.8%), leaving 1,285,193 shares at a market value of $86.2M.
Does the implied price-per-share represent Ancient Art, L.P.'s cost basis in IBKR?
No. The implied price-per-share column is the 13F-HR reported market value divided by reported share count on the filing date (end of quarter). It is a quarter-end mark, not a cost basis or transaction price. Use it as a sanity check on the value column, not as an indicator of the manager's entry or exit price.