QuinStreet Inc. Common Stock. Replay the stock market charts of QNST day by day, back to 2003. Open long and short positions without spending any money. QuinStreet, Inc., an online performance marketing company, provides customer acquisition services for its clients in the United States and internationally. The company offers online marketing services, such as qualified clicks, leads, calls, applications, and customers through its websites or third-party publishers. It serves financial and home services industries. The company was incorporated in 1999 and is headquartered in Foster City, California.
