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,

Interim Intel co-CEO David Zinsner said on Wednesday that the chipmaker’s “core strategy remains intact” and offered further clarification on what its board is seeking.

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.