KCG Holdings, Inc. is an American global financial services firm engaging in market making, high-frequency trading, electronic execution, and institutional sales and trading. The company was formed on July 1, 2013, upon the completion of the merger between Knight Capital Group, Inc. and GETCO Holding Company, LLC. Global growth equity firm General Atlantic, with a 25% stake in GETCO, made an additional equity investment at the time of the merger. Rene Kern, managing director at General Atlantic joined the board of directors