Virtu Financial is one of the largest high-frequency trading (HFT) and market making firms. It provides two-sided quotations and trades in equities, commodities, currencies, options, fixed income, and other securities on over 200 exchanges, markets, and dark pools. Virtu uses proprietary high-frequency trading strategies to trade large volumes of securities. On March 10, 2014, Virtu Financial filed for its initial public offering, yet repeatedly delayed its IPO.