Interactive Brokers Group, Inc.
MX ˙ BMV ˙ US45841N1072
SecurityMX:IBKR / Interactive Brokers Group, Inc.
InstitutionVontobel Holding Ltd.
Latest Disclosed Ownership34,904 shares
Latest Disclosed Value $ 2,341,011
Vontobel Holding Ltd. reports 6.65% increase in ownership of IBKR / Interactive Brokers Group, Inc.

On May 8, 2026 - Vontobel Holding Ltd. filed a 13F-HR form disclosing ownership of 34,904 shares of Interactive Brokers Group, Inc. (MX:IBKR) valued at $2,341,011 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 32,729 shares of Interactive Brokers Group, Inc.. This represents a change in shares of 6.65% 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)
2026-05-08 2026-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 34,904 2,175 6.65 2,341 11.26 0.0022
2026-02-13 2025-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 32,729 -15,773 -32.52 2,105 -36.95 0.0066
2025-10-15 2025-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 48,502 -10,689 -18.06 3,337 1.77 0.0101
2025-07-23 2025-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 59,191 49,201 492.50 3,280 98.25 0.0104
2025-04-28 2025-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 9,990 4,853 94.47 1,654 82.36 0.0060
2025-01-30 2024-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 5,137 -5,461 -51.53 908 -38.55 0.0031
2024-10-16 2024-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 10,598 610 6.11 1,477 20.59 0.0048
2024-08-13 2024-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 9,988 -4,235 -29.78 1,225 -22.92 0.0040
2024-05-10 2024-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 14,223 -8,091 -36.26 1,589 -14.12 0.0127
2024-06-04 2023-12-31 13F/A-1 INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 22,314 3,510 18.67 1,850 13.64 0.0155
2024-01-30 2023-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 43,578 7,020 3,613 0.0181
2024-06-04 2023-09-30 13F/A-1 INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 18,804 5,205 38.27 1,628 44.11 0.0150
2023-10-11 2023-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 36,558 10,505 3,164 0.0177
2024-06-04 2023-06-30 13F/A-1 INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 13,599 0 0.00 1,130 0.62 0.0099
2023-07-24 2023-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 26,053 12,454 2,164 0.0115
2024-06-04 2023-03-31 13F/A-1 INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 13,599 -5,755 -29.74 1,123 -20.26 0.0104
2023-04-12 2023-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 26,053 6,699 2,151 0.0122
2023-02-14 2022-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 19,354 -5,299 -21.49 1,407 -11.29 0.0142
2022-11-04 2022-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 24,653 -1,882 -7.09 1,586 4.82 0.0185
2022-07-27 2022-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 26,535 3,450 14.94 1,513 -2.64 0.0164
2022-05-13 2022-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 23,085 -358 -1.53 1,554 -17.21 0.0134
2022-02-14 2021-12-31 13F/A-1 INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 23,443 -12,879 -35.46 1,877 -17.13 0.0156
2022-02-10 2021-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 36,322 0 2,265 0.0086
2021-10-29 2021-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 36,322 36,322 2,265 0.0200
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.