IBKR

Interactive Brokers Group, Inc.

An automated electronic brokerage serving individual investors, advisors, and hedge funds, Interactive Brokers lets clients trade stocks, options, futures, forex, bonds, and crypto from one platform through tiers like IBKR Pro and commission-free IBKR Lite. It traces back to Hungarian immigrant Thomas Peterffy, who started as a market maker in 1977 and later turned his Timber Hill trading systems into an outside brokerage in 1993. A technology pioneer, Peterffy built what is considered the first handheld computer for trading floors.

CUSIP: 45841N107FinancialsUS8 holders

Ownership Activity Financials Filings

Insiders

Ranked by how much each holding moved in the last 6 months

Galik MilanChief Executive Officer, Director · 1 transaction

3.22M-7.3%

Brody Paul JonathanChief Financial Officer, Director · 1 transaction

2.86M-2.8%

Nemser Earl HVice Chairman, Director · 1 transaction

429.3K-5%

Frank Thomas AJExecutive Vice President · 1 transaction

251.5K-11.2%

Harris Lawrence EDirector · 1 transaction

173.5K-13%

Sold 26.0K

Mendonca DenisChief Accounting Officer · 1 transaction

145.1K-7.1%

Conkling Lori ADirector · 4 transactions

2.5K+4.2%

Bought 100

Insider	Stake change	Holds now	Granted / vested	Bought	Sold
Galik MilanChief Executive Officer, Director · 1 transaction	-7.3%	3.22M	—	—	—
Brody Paul JonathanChief Financial Officer, Director · 1 transaction	-2.8%	2.86M	—	—	—
Nemser Earl HVice Chairman, Director · 1 transaction	-5%	429.3K	—	—	—
Frank Thomas AJExecutive Vice President · 1 transaction	-11.2%	251.5K	—	—	—
Harris Lawrence EDirector · 1 transaction	-13%	173.5K	—	—	26.0K
Mendonca DenisChief Accounting Officer · 1 transaction	-7.1%	145.1K	—	—	—
Conkling Lori ADirector · 4 transactions	+4.2%	2.5K	—	100	—

Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.