AOS, INC. (TradingBlock)

TradingBlock, founded in 2003 and headquartered in Chicago, Illinois, is a technology-driven online brokerage firm. Its core mission is to empower self-directed investors by providing tools and services that help them identify new strategies for generating portfolio income, balance risk, and optimize their trading time. The company aims to deliver professional-grade trading access through its platforms.

The firm offers electronic trading access to a wide range of asset classes, including U.S. equities, options, and futures. TradingBlock provides advanced order routing, customizable interfaces, and specialized options trading tools designed for sophisticated strategies. Beyond individual traders, it serves a diverse market segment including small institutions, asset managers, hedge funds, and Registered Investment Advisors (RIAs), offering services like mini-prime brokerage and portfolio margin. The company also provides a customizable web-based trading dashboard and mobile app, catering to both professional and retail investors.

In a significant development in January 2026, TradingBlock announced its integration with Nant Global Finance, Inc., a newly established capital markets platform focused on modernizing public-market infrastructure through blockchain-enabled settlement technology, pending FINRA approvals. TradingBlock, led by CEO Jere Wickert, will continue to operate as a regulated broker-dealer within this broader ecosystem. The company has received industry recognition, being named "2025 Best Brokerage for Options Trading" by Benzinga and "Trading Platform of the Year" in the 2026 FinTech Breakthrough Awards Program, underscoring its commitment to innovation and professional-grade trading solutions.