The story
Founded by Thomas Peterffy in 1994, in New York City.1
Private company
Logo: Interactive Brokers, Public domain, via Wikimedia Commons3
American financial services firm
Interactive Brokers Group, Inc. (commonly known as Interactive Brokers or IBKR) is an American multinational brokerage and financial services company headquartered in Greenwich, Connecticut.2 It was founded by Thomas Peterffy.1 Wikipedia text CC BY-SA 4.0
Last updated Oct 21, 2026.
See how the biggest companies compare on our leaderboards

Interactive Brokers Group, Inc. (commonly known as Interactive Brokers or IBKR) is an American multinational brokerage and financial services company headquartered in Greenwich, Connecticut.2
Interactive Brokers is part of a group headed by Interactive Brokers LLC - ATS. 45 entities, 15 countries on record. Switch between the flow chart and the network, and select any entity to see its details.
Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries listed in Exhibit 21 of annual reports filed with the SEC. Each entity in the chart links to its source.
Founded by Thomas Peterffy in 1994, in New York City.1
Who has led Interactive Brokers, and when. Pick a name to see everywhere that person has worked.
The numbers on this page point here. Each one links to the record it came from.