Struggling chipmaker Intel says in a surprise announcement that CEO Pat Gelsinger has retired. Two company executives, David Zinsner and Michelle Johnston Holthaus, will act as interim co-CEOs while the company searches for a replacement for Gelsinger,

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.

Pat Gelsinger retires as Intel’s CEO David Zinsner and Michelle Johnston Holthaus appointed interim co-CEOs Intel’s most recent quarterly revenue had dropped 6% as it undergoes restructuring efforts After a near four-year stint as CEO of Intel,