Mergers d Read this Term notification requirements. The violation occurred when Warren Buffet run Berkshire Hathaway acquired voting securities of the USG Corp. A civil lawsuit was filed today against the company at the request of the Federal Trade Commission by the Justice Department's Antitrust Division. Simultaneously the department filed a proposed settlement, setting the ground for a settlement. Back in December 2013, Berkshire Hathaway acquired USG voting securities and held about 28%, valued at more than $950 million.