Interactive Brokers Group, Inc.
MX ˙ BMV ˙ US45841N1072
SecurityMX:IBKR / Interactive Brokers Group, Inc.
InstitutionGotham Asset Management, LLC
ManagerJoel Greenblatt
Latest Disclosed Ownership114,822 shares
Latest Disclosed Value $ 7,701,112
Gotham Asset Management, LLC reports 1.60% increase in ownership of IBKR / Interactive Brokers Group, Inc.

On May 15, 2026 - Gotham Asset Management, LLC filed a 13F-HR form disclosing ownership of 114,822 shares of Interactive Brokers Group, Inc. (MX:IBKR) valued at $7,701,112 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 113,009 shares of Interactive Brokers Group, Inc.. This represents a change in shares of 1.60% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 114,822 1,813 1.60 7,701 5.97 0.0236
2026-02-17 2025-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 113,009 -1,018 -0.89 7,268 -7.38 0.0265
2025-11-14 2025-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 114,027 4,311 3.93 7,846 29.07 0.0342
2025-08-14 2025-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 109,716 82,287 300.00 6,079 33.87 0.0364
2025-05-15 2025-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 27,429 -925 -3.26 4,542 -9.34 0.0379
2025-02-14 2024-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 28,354 -2,166 -7.10 5,009 17.78 0.0475
2024-11-14 2024-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 30,520 -979 -3.11 4,253 10.15 0.0440
2024-08-14 2024-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 31,499 -1,017 -3.13 3,862 6.31 0.0500
2024-05-15 2024-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 32,516 -55 -0.17 3,632 34.52 0.0549
2024-02-14 2023-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 32,571 -3,592 -9.93 2,700 -13.74 0.0501
2023-11-14 2023-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 36,163 -105 -0.29 3,130 3.92 0.0647
2023-08-14 2023-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 36,268 -4,411 -10.84 3,013 -10.30 0.0655
2023-05-15 2023-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 40,679 4,069 11.11 3,358 26.81 0.0814
2023-02-14 2022-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 36,610 4,506 14.04 2,649 29.04 0.0745
2022-11-14 2022-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 32,104 9,978 45.10 2,052 68.61 0.0615
2022-08-15 2022-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 22,126 11,003 98.92 1,217 66.03 0.0391
2022-05-16 2022-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 11,123 5,091 84.40 733 53.03 0.0227
2022-02-14 2021-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 6,032 2,185 56.80 479 99.58 0.0155
2021-11-15 2021-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 3,847 3,847 240 0.0097
2018-08-14 2018-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 0 -3,057 -100.00 0 -100.00
2018-05-15 2018-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 3,057 3,057 206 0.0029
2017-11-14 2017-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 0 -8,052 -100.00 0 -100.00
2017-08-14 2017-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 8,052 -2,539 -23.97 301 -18.21 0.0042
2017-05-15 2017-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 10,591 479 4.74 368 -0.27 0.0047
2017-02-14 2016-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 10,112 723 7.70 369 11.48 0.0048
2016-11-14 2016-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 9,389 1,927 25.82 331 25.38 0.0043
2016-08-15 2016-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 7,462 7,462 264 0.0032
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.