Virtu Financial, Inc.
A market-making firm that uses high-speed technology and algorithms to stand ready to buy and sell stocks, exchange-traded funds, currencies, and other securities across global markets, keeping them liquid for everyone else. Founded in 2008 by Vincent "Vinnie" Viola, a U.S. Army veteran and former chairman of the New York Mercantile Exchange, and Douglas Cifu, its name is a play on "virtue." The firm famously disclosed in its 2014 IPO filing that it had been profitable on 1,277 of 1,278 trading days.
Estimated from filings — the split-adjusted price range over the quarters each manager built the position. A range, not a fill price; 13F reports a quarter-end snapshot, not a trade date.