Mark L. Mitchell

The NASDAQ Stock Market, Inc. is the U.S. electronic stock market. With approximately 3,300 companies, it lists more companies and, on average, trades more shares per day than any other U.S. market. It is home to companies that are leaders across all areas of business including technology, retail, communications, financial services, transportation, media and biotechnology. NASDAQ is the primary market for trading NASDAQ-listed stocks

AQR Arbitrage LLC (AQR) is SEC-registered investment advisor and hedge fund manager headquartered in Greenwich, Connecticut. The firm was founded as CNH Partners LLC in 2001 through a joint venture between CNH Capital Management LLC and AQR Capital Management LLC. They were renamed AQR Arbitrage LLC in 2022. AQR provides investment management services to institutional clients including investment companies and pooled investment vehicles. Additionally, the firm provides advisory and sub-advisory services to AQR Sponsored Funds and AQR Mutual Funds.

Ameritrade Holding Corp. develops and provides innovative brokerage products and services tailored to meet the varying investing and portfolio management needs of individual investors and institutional distribution partners. The company is headquartered in Omaha, NE.

GainsKeeper, Inc. provides automated tax based financial tools and services to the investment community. The company was founded by Cameron Routh and Chadwick W. Cook in 1999 and is headquartered in Quincy, MA.

TD Ameritrade Holding Corp. engages in the provision of securities brokerage services and related technology-based financial services. It offers the following products and services to retail clients: touch-tone trading, trading over the internet, unlimited streaming, free real-time quotes, extended trading hours, direct access to market destinations and commitment ton the speed of order execution. The company was founded by John Joe Ricketts in 1971 and is headquartered in Omaha, NE.

Financial Industry Regulatory Authority, Inc. engages in the provision of securities regulation, complementary compliance, and technology-based services. Its services include writing and enforcing rules governing the activities of securities firms with brokers, examining firms for compliance with those rules, fostering market transparency, and educating investors. The company was founded in 2007 and is headquartered in Washington, DC.