Interactive Brokers Group, Inc.
MX ˙ BMV ˙ US45841N1072
SecurityMX:IBKR / Interactive Brokers Group, Inc.
InstitutionGuggenheim Capital Llc
Latest Disclosed Ownership24,642 shares
Latest Disclosed Value $ 1,652,739
Guggenheim Capital Llc reports 10.80% decrease in ownership of IBKR / Interactive Brokers Group, Inc.

On May 15, 2026 - Guggenheim Capital Llc filed a 13F-HR form disclosing ownership of 24,642 shares of Interactive Brokers Group, Inc. (MX:IBKR) valued at $1,652,739 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 27,626 shares of Interactive Brokers Group, Inc.. This represents a change in shares of -10.80% 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 24,642 -2,984 -10.80 1,653 -6.98 0.0064
2026-02-17 2025-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 27,626 6,283 29.44 1,777 20.98 0.0127
2025-11-13 2025-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 21,343 650 3.14 1,469 28.10 0.0107
2025-08-13 2025-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 20,693 15,047 266.51 1,147 22.70 0.0091
2025-05-14 2025-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 5,646 147 2.67 935 -3.81 0.0086
2025-02-13 2024-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 5,499 2,645 92.68 972 144.58 0.0079
2024-11-13 2024-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 2,854 -5,432 -65.56 398 -60.89 0.0028
2024-08-14 2024-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 8,286 -3,504 -29.72 1,016 -22.93 0.0072
2024-05-14 2024-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 11,790 -10,433 -46.95 1,317 -28.50 0.0093
2024-02-14 2023-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 22,223 16,881 316.01 1,842 298.70 0.0139
2023-11-14 2023-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 5,342 5,342 462 0.0040
2023-08-11 2023-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 0 -7,121 -100.00 0 -100.00
2023-05-11 2023-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 7,121 2,165 43.68 588 63.97 0.0049
2023-02-14 2022-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 4,956 452 10.04 359 24.31 0.0031
2022-11-14 2022-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 4,504 -16,059 -78.10 288 -74.54 0.0026
2022-08-15 2022-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 20,563 -2,008 -8.90 1,131 -23.99 0.0089
2022-05-16 2022-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 22,571 1,497 7.10 1,488 -11.11 0.0089
2022-02-14 2021-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 21,074 -13,378 -38.83 1,674 -22.07 0.0087
2021-11-15 2021-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 34,452 3,671 11.93 2,148 6.18 0.0129
2021-08-13 2021-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 30,781 19,145 164.53 2,023 138.00 0.0119
2021-05-13 2021-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 11,636 -346 -2.89 850 16.44 0.0056
2021-02-16 2020-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 11,982 11,982 730 0.0046
2020-02-20 2019-12-31 13F/A-1 INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 0 -15,578 -100.00 0 -100.00
2020-02-20 2019-09-30 13F/A-1 INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 15,578 4,699 43.19 838 42.28 0.0067
2019-11-14 2019-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 15,578 4,699 838 4,696.6331
2019-08-14 2019-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 10,879 -257 -2.31 589 1.90 0.0048
2019-05-15 2019-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 11,136 5,413 94.58 578 85.26 0.0047
2019-02-14 2018-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 5,723 -9,594 -62.64 312 -63.16 0.0026
2018-11-14 2018-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 15,317 1,104 7.77 847 -7.53 0.0055
2018-08-14 2018-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 14,213 -40,588 -74.06 916 -75.14 0.0061
2018-05-15 2018-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 54,801 -57,110 -51.03 3,685 -44.39 0.0090
2018-02-14 2017-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 111,911 15,859 16.51 6,626 53.17 0.0157
2017-11-14 2017-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 96,052 88,270 1,134.28 4,326 1,381.51 0.0102
2017-08-14 2017-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 7,782 -79,770 -91.11 292 -90.39 0.0008
2017-05-15 2017-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 87,552 40,108 84.54 3,039 75.36 0.0082
2017-02-14 2016-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 47,444 6,811 16.76 1,733 20.94 0.0050
2016-11-14 2016-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 40,633 -6,213 -13.26 1,433 -13.57 0.0045
2016-08-15 2016-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 46,846 -1,046 -2.18 1,658 -11.95 0.0052
2016-05-16 2016-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 47,892 15,937 49.87 1,883 35.08 0.0059
2016-02-16 2015-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 31,955 8,864 38.39 1,394 53.02 0.0041
2015-11-16 2015-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 23,091 2,702 13.25 911 7.56 0.0028
2015-08-14 2015-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 20,389 2,479 13.84 847 39.08 0.0021
2015-05-18 2015-03-31 13F/A-1 INTERACTIVE BROKERS GROUP IN COM 45841N107 17,910 -9,094 -33.68 609 -22.62 0.0014
2015-05-15 2015-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 17,910 609
2015-02-17 2014-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 27,004 5,190 23.79 787 44.67 0.0020
2014-11-14 2014-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 21,814 21,814 0.00 544 0.0013
2014-08-14 2014-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 0 -28,026 -100.00 0 -100.00
2014-05-16 2014-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 28,026 -37,783 -57.41 607 -62.32 0.0017
2014-02-14 2013-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 65,809 -5,920 -8.25 1,611 19.69 0.0049
2013-11-14 2013-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 71,729 -1,040 -1.43 1,346 15.83 0.0048
2013-08-22 2013-06-30 13F/A-1 INTERACTIVE BROKERS GROUP IN COM 45841N107 72,769 72,769 1,162 0.0049
2013-08-14 2013-06-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 72,769 1,162 0.0049
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.