Siemens to Buy Mentor Graphics in Multibillion-Dollar Software Push

FRANKFURT—German industrial giant Siemens AG Monday announced a multibillion-dollar deal to acquire Mentor Graphics Corp, in its latest move to beef up its software capabilities and widen its U.S. footprint.

Siemens said it offered $37.25 a share in cash, equivalent to a 21% premium to Mentor’s closing price on Friday, giving the U.S. company an equity value of around $4 billion.

Wilsonville, Ore.-based Mentor sells software and hardware design-automation tools for the development and testing of advanced electronic systems.