Interactive Brokers Group, Inc.
MX ˙ BMV ˙ US45841N1072
SecurityMX:IBKR / Interactive Brokers Group, Inc.
InstitutionJacobs Levy Equity Management, Inc
Latest Disclosed Ownership3,931,016 shares
Latest Disclosed Value $ 263,653,243
Jacobs Levy Equity Management, Inc reports 18.33% decrease in ownership of IBKR / Interactive Brokers Group, Inc.

On May 15, 2026 - Jacobs Levy Equity Management, Inc filed a 13F-HR form disclosing ownership of 3,931,016 shares of Interactive Brokers Group, Inc. (MX:IBKR) valued at $263,653,243 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 4,813,320 shares of Interactive Brokers Group, Inc.. This represents a change in shares of -18.33% 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 3,931,016 -882,304 -18.33 263,653 -14.83 1.1083
2026-02-13 2025-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 4,813,320 75,779 1.60 309,545 -5.04 1.1953
2025-11-17 2025-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 4,737,541 -659,389 -12.22 325,990 9.01 1.2951
2025-08-14 2025-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 5,396,930 4,166,723 338.70 299,044 46.80 1.1725
2025-05-15 2025-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,230,207 145,870 13.45 203,710 6.34 0.8080
2025-02-14 2024-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,084,337 376,004 53.08 191,570 94.07 0.6778
2024-11-14 2024-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 708,333 61,798 9.56 98,713 24.54 0.3807
2024-08-14 2024-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 646,535 115,247 21.69 79,265 33.56 0.3278
2024-05-15 2024-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 531,288 -198,855 -27.24 59,350 -1.95 0.2652
2024-02-14 2023-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 730,143 -19,500 -2.60 60,529 -6.72 0.3049
2023-11-17 2023-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 749,643 -1,570 -0.21 64,889 3.98 0.3843
2023-08-14 2023-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 751,213 13,576 1.84 62,403 2.47 0.3596
2023-05-15 2023-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 737,637 -106,371 -12.60 60,899 -0.27 0.3732
2023-02-14 2022-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 844,008 174,115 25.99 61,064 42.63 0.4132
2022-11-15 2022-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 669,893 669,893 42,813 0.3384
2021-11-15 2021-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 0 -230,523 -100.00 0 -100.00
2021-08-16 2021-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 230,523 86,163 59.69 15,152 43.70 0.1027
2021-05-17 2021-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 144,360 -3,775 -2.55 10,544 16.84 0.0813
2021-02-16 2020-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 148,135 -99,127 -40.09 9,024 -24.49 0.0791
2020-11-16 2020-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 247,262 167,360 209.46 11,950 258.00 0.1239
2020-08-17 2020-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 79,902 25,266 46.24 3,338 41.50 0.0361
2020-05-15 2020-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 54,636 5,659 11.55 2,359 3.33 0.0303
2020-02-14 2019-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 48,977 0 0.00 2,283 -13.33 0.0224
2019-11-14 2019-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 48,977 -61,745 -55.77 2,634 -56.11 0.0323
2019-08-13 2019-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 110,722 -49,430 -30.86 6,001 -27.78 0.0830
2019-05-14 2019-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 160,152 86,122 116.33 8,309 105.36 0.1199
2019-02-14 2018-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 74,030 0 0.00 4,046 -1.20 0.0711
2018-11-14 2018-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 74,030 39,330 113.34 4,095 83.22 0.0581
2018-08-14 2018-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 34,700 -74,859 -68.33 2,235 8.71 0.0351
2013-11-14 2013-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 109,559 109,559 2,056 0.0348
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.