# clm_AF1F71BE38D5

subject: Interactive Brokers (/record/interactive-brokers.md)  
predicate: founded  
value: 1977  
valid_from: 1977-01-01  
valid_to: null  
published: no source on record carries a date  
recorded: 2026-11-11  
confidence: 0.95  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-12  
cite: AsOf. "Interactive Brokers founded: 1977", as of 1977-01-01. Claim clm_AF1F71BE38D5, https://asof.is/claim/clm_AF1F71BE38D5, accessed 2026-11-12. Source: https://www.interactivebrokers.com/en/general/about/info-and-history.php.  
checked: 2026-11-12 · its source page states the value and the date  

> Interactive Brokers History Equity Capital 1977 Thomas Peterffy (now Chairman of the Interactive Brokers (IBKR) Group) buys a seat on the American Stock Exchange (AMEX) and becomes a member, trading as an individual market maker in equity options.

What https://www.interactivebrokers.com/en/general/about/info-and-history.php says, word for word.

## Sources

- https://www.interactivebrokers.com/en/general/about/info-and-history.php (primary, interactivebrokers.com)

---

AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.