Mason Kirby is not happy about the Lubrizol incident and can't believe Buffett would allow such a thing to go down on his watch.

Kirby, suing to recover damages for the company, contends that Sokol, also a defendant, hurt the firm by taking a stake in Lubrizol before recommending to Buffett that Berkshire buy the company, according to papers made public today in Delaware Chancery Court in Wilmington. “Sokol knew that Buffett would closely consider and likely take his recommendation,” Kirby said. “As a result of Sokol’s unethical behavior, Berkshire suffered significant reputational losses and other damages.”

Kirby alleges that Buffett and Sokol, “working in concert,” violated duties to shareholders “and put the company at risk for a potential adverse SEC action and negative credit rating.”

[Bloomberg]