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.

Shake up in Silicon Valley. Intel CEO Pat Gelsinger announces immediate retirement with the company naming two interim co-CEOs to lead the chipmaker. He started at Intel in 1979 and was its first chief technology officer.

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,