KCG Holdings was a financial services firm that specialized in market making and trading. Founded in 2013, it aimed to provide liquidity in various financial markets, including equities and options. The company utilized advanced technology and algorithms to execute trades efficiently. In 2017, KCG Holdings was acquired by Virtu Financial, a global electronic trading firm. This acquisition allowed Virtu to enhance its trading capabilities and expand its market presence. KCG's expertise in high-frequency trading and market making contributed to Virtu's overall growth in the financial sector.