Ari Rubenstein is the co-founder and CEO of GTS, an international trading firm specializing in transparent, customized liquidity solutions. GTS combines broad industry experience with elite, proprietary technology that has proven itself under the most unpredictable and extreme market conditions. The firm trades over 500,000 different financial instruments globally and is a leading Designated Market Maker at the NYSE. On any given day, GTS’ proprietary systems trade as many as a billion shares of U.S. equities, and through its retail and ETF market-making businesses, GTS touches virtually every trading household in the U.S. Mr. Rubenstein is the founder of ClearList, a stock market for private companies, and Radkl, a quantitative trading firm for digital assets. He is also a co-founder of the Modern Markets Initiative, an education, and advocacy organization dedicated to innovation in the financial markets. In his leadership role at GTS, Mr. Rubenstein heads day-to-day management of the firm. He develops and deploys new trading businesses, partners with other leading industry participants, and oversees operations and strategic initiatives. Mr. Rubenstein is a vocal supporter of the efficiency and democratization of modern markets and an outspoken advocate for thoughtful, intelligent, and data-driven regulation. He has appeared before the U.S. House Financial Services Committee and the Securities and Exchange Commission, testifying on key market structure issues, including the importance of publicly listed companies in job creation and economic growth.