Intel CEO Pat Gelsinger has retired, the struggling chipmaker said Monday in a surprise announcement. Two company executives, David Zinsner and Michelle Johnston Holthaus, will act as interim co-CEOs while the company searches for a replacement for Gelsinger, who also stepped down from the company's board.

Intel ousted CEO Pat Gelsinger over the weekend , capping a tumultuous nearly four-year tenure at what was America's leading semiconductor company before its stock price and market share collapsed.

Gelsinger, 63, stepped down as CEO and left Intel’s board effective yesterday (Dec. 1), the chipmaker announced today in a press release. David Zinsner and Michelle Johnston Holthaus, two senior Intel executives,