David Don

Founded in 2000 by Alistair Brown and Mark Gorton, Lime Brokerage LLC is a broker/dealer located in New York City. The firm is a subsidiary of WEDBUSH, Inc. Lime Brokerage's clients include professional traders, hedge funds, asset managers and other broker/dealers. Clients use the firm's advanced technology to execute equities transactions on multiple exchanges, ECNs and trading venues. The firm provides a full array of trading and execution services for their clients. They do not provide any internal research.

Cactus Trading Systems provides trading firms and hedge funds with technology solutions and services to streamline and optimize their algorithmic and quantitative trading operations. Their flagship product is Cactus Trader, a high-performance multi asset class strategy development platform designed for efficient implementation, testing, and deployment of algorithmic trading strategies. The Cactus Trader framework promotes interaction between traders, developers, and business managers, leveraging the strengths and knowledge base of all participants, resulting in a much more integrated approach to strategy development. Lean and agile, the Cactus Trader functions as a thin layer on top of the trading strategy logic. This simplicity dramatically reduces computing overhead allowing Cactus Trader to operate with a higher degree of speed than other algorithmic trading solutions. Built in C++ on sound software engineering principles, Cactus Trader's cross platform, modular design allows its underlying architecture to accommodate a wide range of user needs.

Founded in 2004, TD Securities (USA) LLC is a broker/dealer located in New York City with additional offices in Toronto, Montreal, Calgary, Vancouver, London, Singapore, Tokyo and Sydney. The firm is a subsidiary of Toronto Dominion Holdings (USA), Inc. and their ultimate parent is Toronto-Dominion Bank (NYSE: TD). TD Securities (USA) provides a wide range of capital market products and services to corporate, government and institutional clients in five areas of finance including: investment banking, debt capital markets, institutional equities, foreign exchange and money markets. Their services include the underwriting and distribution of new debt and equity issues, providing advice on strategic acquisitions and divestitures and executing daily trading and investment needs. The equity group provides research coverage of media and communications, technology, financial services, oil and gas, mining and metals, industrial products, forest products, technology, utilities and power, real estate, biotechnology, consumer products and merchandising and quantitative analysis strategy. The fixed-income group provides a full range of underwriting sales and trading products for Canadian, U.S. and European debt issuers and investors.

Cboe Exchange, Inc. provides options exchange services. It trades equity options, security index options, options on exchange traded notes and products, binary options, one-week and quarterly options, long-term equity anticipation securities options, and flexible exchange options. The firm also provides information on various stock and options trading strategies, options trading tools, stock and option quotes and data; and options information and education. Additionally, they offer access to product information, conference notices, portfolio management tools, and educational materials for institutional investors and products and strategies for advisors to protect client’s portfolios. The company was founded in 1973 and is headquartered in Chicago, IL.