Interactive Brokers Group, Inc.
MX ˙ BMV ˙ US45841N1072
SecurityMX:IBKR / Interactive Brokers Group, Inc.
InstitutionAssenagon Asset Management S.A.
Latest Disclosed Ownership1,192,749 shares
Latest Disclosed Value $ 79,997,675
Assenagon Asset Management S.A. reports 2,707.92% increase in ownership of IBKR / Interactive Brokers Group, Inc.

On April 20, 2026 - Assenagon Asset Management S.A. filed a 13F-HR form disclosing ownership of 1,192,749 shares of Interactive Brokers Group, Inc. (MX:IBKR) valued at $79,997,675 USD as of March 31, 2026. The entity filed a previous 13F-HR on January 9, 2026 disclosing 42,478 shares of Interactive Brokers Group, Inc.. This represents a change in shares of 2,707.92% 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)
2026-04-20 2026-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,192,749 1,150,271 2,707.92 79,998 2,829.22 0.1214
2026-01-09 2025-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 42,478 -1,236,776 -96.68 2,732 -96.90 0.0038
2025-10-07 2025-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 1,279,254 1,279,254 88,025 0.1204
2025-07-11 2025-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 0 -36,760 -100.00 0 -100.00
2025-04-15 2025-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 36,760 -178,808 -82.95 6,087 -84.02 0.0102
2025-01-14 2024-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 215,568 106,618 97.86 38,084 150.83 0.0614
2024-10-23 2024-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 108,950 100,003 1,117.73 15,183 1,285.31 0.0279
2024-07-18 2024-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 8,947 -2,395 -21.12 1,097 -13.50 0.0024
2024-04-24 2024-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 11,342 -232,757 -95.35 1,267 -93.74 0.0030
2024-01-17 2023-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 244,099 175,194 254.25 20,236 239.29 0.0537
2023-11-06 2023-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 68,905 50,864 281.94 5,964 298.13 0.0185
2023-07-25 2023-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 18,041 -601,840 -97.09 1,499 -97.07 0.0052
2023-04-18 2023-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 619,881 -355,625 -36.46 51,177 73,010.00 0.1817
2023-01-12 2022-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 975,506 644,923 195.09 71 -99.67 0.2546
2022-10-27 2022-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 330,583 125,405 61.12 21,128 87.19 0.0811
2022-07-27 2022-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 205,178 -127,219 -38.27 11,287 -48.48 0.0418
2022-04-25 2022-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 332,397 317,494 2,130.40 21,908 1,750.34 0.0609
2022-02-01 2021-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 14,903 -71,272 -82.71 1,184 -77.96 0.0034
2021-10-19 2021-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 86,175 -313,484 -78.44 5,372 -79.55 0.0172
2021-07-15 2021-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 399,659 342,015 593.32 26,270 523.99 0.0892
2021-04-26 2021-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 57,644 57,644 4,210 0.0171
2021-02-01 2020-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 0 -13,115 -100.00 0 -100.00
2020-10-07 2020-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 13,115 13,115 634 0.0036
2019-01-23 2018-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 0 -359,553 -100.00 0 -100.00
2018-10-29 2018-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 359,553 216,666 151.63 19,887 116.09 0.1963
2018-07-17 2018-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 142,887 142,887 9,203 0.1062
2018-04-30 2018-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 0 -97,151 -100.00 0 -100.00
2018-01-25 2017-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 97,151 97,151 5,752 0.0592
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.