Group One Trading, L.P.
Group One Trading, L.P. is a privately held trading firm headquartered in Chicago, Illinois, United States. Founded in 1989, the firm specializes as a market maker and proprietary trading company focused on options and equities across major US exchanges. It is registered with the SEC and regulated by FINRA, and serves institutional clients, exchanges, and liquidity counterparties. The company typically employs over 150 professionals including traders, technologists, and support staff, operating from its Chicago headquarters and additional locations.
Investment Strategy
Group One Trading, L.P. acts primarily as a market maker, employing proprietary quantitative and statistical models to provide liquidity in listed equity options and related derivative markets. The firm's strategy centers on price discovery, risk management, and technology-driven trading, with a focus on maintaining tight bid-ask spreads and capital efficiency. Investments are not client-directed; instead, the firm utilizes its own capital for automated trading and hedging, aiming to profit from market imbalances and volatility.
Top Holdings
Equity Positions (1,893)
| Ticker | Security | Weight | Market Value | Shares | Avg Cost | Price | Change (QoQ) |
|---|---|---|---|---|---|---|---|
I IREN | IREN LIMITED | 0.21% | $94.4M | 6,481,473 | $9.10 | $14.57 | +$48.4M |
M MSTR | MICROSTRATEGY INC | 0.14% | $63.6M | 157,346 | $297.30 | $404.23 | +$21.5M |
H HOOD | ROBINHOOD MKTS INC | 0.13% | $57.8M | 617,148 | $36.90 | $93.63 | +$30.5M |
C C | CITIGROUP INC | 0.11% | $50.6M | 594,431 | $74.57 | $85.12 | +$28.7M |
S SOFI | SOFI TECHNOLOGIES INC | 0.10% | $45.6M | 2,504,295 | $11.73 | $18.21 | +$25.3M |