Interactive Brokers Group, Inc.
US ˙ NasdaqGS ˙ US45841N1072

SecurityIBKR / Interactive Brokers Group, Inc.
InstitutionEngineers Gate Manager LP
Latest Disclosed Ownership11,635 shares
Latest Disclosed Value $ 780,360
Engineers Gate Manager LP reports 83.76% decrease in ownership of IBKR / Interactive Brokers Group, Inc.

On May 15, 2026 - Engineers Gate Manager LP filed a 13F-HR form disclosing ownership of 11,635 shares of Interactive Brokers Group, Inc. (US:IBKR) valued at $780,359 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 71,651 shares of Interactive Brokers Group, Inc.. This represents a change in shares of -83.76% during the quarter. The current value of the position is $1,013,990 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.

Upgrade to unlock premium data and export to Excel .

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 11,635 -60,016 -83.76 780 -83.07 0.0098
2026-02-17 2025-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 71,651 60,124 521.59 4,608 480.96 0.0546
2025-11-14 2025-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 11,527 -28,134 -70.94 793 -63.91 0.0091
2025-08-14 2025-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 39,661 -12,214 -23.55 2,198 -74.42 0.0273
2025-05-15 2025-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 51,875 38,055 275.36 8,590 251.86 0.1448
2025-02-14 2024-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 13,820 4,788 53.01 2,442 94.04 0.0425
2024-11-14 2024-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 9,032 1,489 19.74 1,259 36.15 0.0246
2024-08-14 2024-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 7,543 7,543 925 0.0209
2024-05-15 2024-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 0 -29,654 -100.00 0 -100.00
2024-02-14 2023-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 29,654 16,330 122.56 2,458 113.18 0.0702
2023-11-14 2023-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 13,324 3,766 39.40 1,153 45.40 0.0426
2023-08-14 2023-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 9,558 -11,103 -53.74 794 -53.49 0.0300
2023-05-15 2023-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 20,661 11,161 117.48 1,706 148.18 0.0713
2023-02-14 2022-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 9,500 9,500 687 0.0413
2022-08-15 2022-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 0 -6,293 -100.00 0 -100.00
2022-05-16 2022-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 6,293 6,293 415 0.0162
2022-02-14 2021-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 0 -8,991 -100.00 0 -100.00
2021-11-15 2021-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 8,991 -13,243 -59.56 560 -61.67 0.0319
2021-08-16 2021-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 22,234 -4,456 -16.70 1,461 -25.04 0.0940
2021-05-17 2021-03-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 26,690 26,690 1,949 0.0966
2021-02-16 2020-12-31 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 0 -21,742 -100.00 0 -100.00
2020-11-16 2020-09-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 21,742 -27,409 -55.76 1,051 -48.81 0.0493
2020-08-17 2020-06-30 13F INTERACTIVE BROKERS GROUP IN COM CL A 45841N107 49,151 49,151 2,053 0.1045
2019-02-14 2018-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 0 -23,187 -100.00 0 -100.00
2018-11-01 2018-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 23,187 23,187 1,282 0.0985
2018-05-07 2018-03-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 0 -39,131 -100.00 0 -100.00
2018-02-01 2017-12-31 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 39,131 17,932 84.59 2,317 142.62 0.1590
2017-11-13 2017-09-30 13F INTERACTIVE BROKERS GROUP IN COM 45841N107 21,199 21,199 955 0.0804
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.