Interactive Brokers Group, Inc.
US ˙ NasdaqGS ˙ US45841N1072

SecurityIBKR / Interactive Brokers Group, Inc.
Institution1832 Asset Management L.P.
Latest Disclosed Ownership4,454,154 shares
Latest Disclosed Value $ 298,740,109
1832 Asset Management L.P. reports 11.41% decrease in ownership of IBKR / Interactive Brokers Group, Inc.

On May 14, 2026 - 1832 Asset Management L.P. filed a 13F-HR form disclosing ownership of 4,454,154 shares of Interactive Brokers Group, Inc. (US:IBKR) valued at $298,740,109 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 5,027,916 shares of Interactive Brokers Group, Inc.. This represents a change in shares of -11.41% during the quarter. The current value of the position is $375,930,598 USD.

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)
2026-05-14 2026-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 4,454,154 -573,762 -11.41 298,740 -7.61 0.2746
2026-02-13 2025-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 5,027,916 3,632,492 260.31 323,345 236.75 0.2463
2025-11-14 2025-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,395,424 -19,353 -1.37 96,019 22.49 0.0758
2025-08-13 2025-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,414,777 1,153,944 442.41 78,393 81.50 0.0612
2025-05-14 2025-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 260,833 -1,100 -0.42 43,191 -6.66 0.0393
2025-02-14 2024-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 261,933 -302,792 -53.62 46,276 -41.20 0.0393
2024-11-13 2024-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 564,725 -2,307 -0.41 78,700 13.21 0.0599
2024-08-13 2024-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 567,032 -42,949 -7.04 69,518 2.02 0.0565
2024-05-14 2024-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 609,981 -65,021 -9.63 68,141 21.77 0.0403
2024-02-13 2023-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 675,002 -31,361 -4.44 55,958 -8.48 0.0806
2023-11-13 2023-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 706,363 -642 -0.09 61,143 4.11 0.0867
2023-08-14 2023-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 707,005 -137,832 -16.31 58,731 -15.80 0.1142
2023-05-12 2023-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 844,837 -253,765 -23.10 69,750 -12.25 0.1435
2023-02-15 2022-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,098,602 -46,804 -4.09 79,484 8.58 0.1634
2022-11-14 2022-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,145,406 14,140 1.25 73,203 17.63 0.1559
2022-08-15 2022-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,131,266 -2,673 -0.24 62,231 -15.57 0.1254
2022-05-16 2022-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,133,939 103,427 10.04 73,711 -11.51 0.1203
2022-02-15 2021-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,030,512 1,392 0.14 83,300 24.35 0.1474
2021-11-15 2021-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,029,120 25,148 2.50 66,986 0.96 0.1255
2021-08-20 2021-06-30 13F/A-1 INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,003,972 165,333 19.71 66,349 8.89 0.1283
2021-08-16 2021-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,003,972 165,333 66,349 0.1285
2021-05-17 2021-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 838,639 676,719 417.93 60,930 523.90 0.1317
2021-02-16 2020-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 161,920 161,920 9,766 0.0228
2017-05-15 2017-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 0 -10,200 -100.00 0 -100.00
2017-04-01 2016-12-31 13F/A-1 INTERACTIVE BROKERS GROUP IN COM 45841N107 10,200 -29,500 -74.31 372 -73.43 0.0011
2017-02-14 2016-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 39,700 1,368
2016-11-15 2016-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 39,700 3,600 9.97 1,400 8.86 0.0053
2016-08-12 2016-06-30 13F/A-1 INTERACTIVE BROKERS GROUP IN COM 45841N107 36,100 8,800 32.23 1,286 -28.63 0.0050
2016-08-12 2016-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 36,100 8,800 2,147 0.0052
2016-05-12 2016-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 27,300 27,300 0.00 1,802 0.0044
2015-11-12 2015-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 0 -16,400 -100.00 0 -100.00
2015-08-13 2015-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 16,400 -13,500 -45.15 681 -33.17 0.0023
2015-05-13 2015-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 29,900 -900 -2.92 1,019 13.60 0.0038
2015-02-12 2014-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 30,800 -7,000 -18.52 897 -4.98 0.0028
2014-11-12 2014-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 37,800 -17,300 -31.40 944 -26.48 0.0031
2014-08-13 2014-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 55,100 18,500 50.55 1,284 65.25 0.0040
2014-05-14 2014-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 36,600 36,600 777 0.0027
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.