Federal regulators on Monday charged Dallas Mavericks owner Mark Cuban with insider trading for allegedly using confidential information on a stock sale to avoid more than $750,000 in losses.

The Securities and Exchange Commission filed a civil lawsuit against Cuban in federal court in Dallas. The agency alleged that in June 2004, Cuban was invited to get in on the coming stock offering by Mamma.com Inc. after he agreed to keep the information private.

The SEC said Cuban knew the shares would be sold below the current market price, and a few hours after receiving the information, told his broker to sell his entire stake of 600,000 shares in the search engine company before the public announcement of the offering.

By selling when he did, Cuban avoided losses exceeding $750,000, according to the SEC. At the time of the offering, Cuban was the largest known shareholder in the Montreal-based company, which later changed its name to Copernic Inc.