Four big tech companies embroiled in a Silicon Valley hiring controversy are appealing a judge’s decision to reject a settlement that would have seen them pay $325 million to settle a class action case brought engineers and other employees. According to Reuters, the companies — Apple, Google, Adobe and Intel — have described U.S. District Judge Lucy Koh’s decision last month as “rigid and formulaic” and suggested that rejecting the deal would serve to waste years of court time. The underlying controversy turns on an alleged conspiracy by some of the tech world’s biggest names, including the late Steve Jobs of Apple and Sergey Brin of Google, in which their companies agreed not to recruit each others’ employees.