Greenlight Capital Inc., David Einhorn’s New York-based hedge fund, may have lost as much as $67.6 million from its stake in Marvell Technology Group Ltd. as the shares tumbled over the past two days, according to regulatory filings.

Marvell shares fell 4.1 percent Thursday, after slumping 10 percent Wednesday, following a verdict from a federal jury in Pittsburgh ordering the maker of chips for computers and mobile phones to pay a $1.17 billion award for infringing Carnegie Mellon patents covering integrated circuits. It was the fourth-largest U.S. patent verdict ever, according to data compiled by Bloomberg.

Greenlight held 32.7 million shares of Hamilton, Bermuda- based Marvell, valued at $299.6 million as of Sept. 30, making it the company’s third-largest shareholder, according to data compiled by Bloomberg. The holding is valued at $232 million Thursday, assuming Greenlight didn’t reduce or increase its stake since the last filing.

Einhorn said on a July 31 conference call that Marvell was poised to rebound after falling since the end of March, when the shares were trading at $15.73, more than twice Thursday’s price. He said the company, along with General Motors Co., trades at low valuations relative to earnings and has “strong cash positions.” Marvell has tumbled 37 percent since Einhorn’s remarks.

Carnegie Mellon sued over use of the two patents, issued in 2001 and 2002, that cover ways to detect data stored on a computer’s hard-disk drive by filtering out noise or unwanted electrical signals. The school in a March 6 complaint said at least nine types of Marvell’s circuits use its inventions.

Marvell said Thursday that it hasn’t recorded any liability on its financial statements for the lawsuit.

Jonathan Gasthalter, a spokesman for Greenlight, declined to comment.