The Globe and Mail reports in its Wednesday edition that the chairman of the U.S. Securities and Exchange Commission told a congressional committee on Tuesday he did not believe his predecessor, Mary Jo White, knew of a 2016 cyberbreach to the regulator's corporate disclosure system. A Reuters dispatch to The Globe says that Jay Clayton, who was appointed in May, also said listed companies should disclose more detailed information on cyberbreaches "sooner," and that the U.S. regulator was working on new guidelines to ensure this. The Senate Banking Committee grilled Mr. Clayton over a 2016 hack of EDGAR, which was only disclosed last Wednesday. Mr. Clayton said he had decided last weekend to disclose the breach once he had enough information to establish it was "serious," but he would not be drawn on who at the agency had known about it and whether there was an attempt to cover it up. Mr. Clayton originally had been scheduled to discuss capital-market reform at his first hearing before the committee since being formally appointed in May, but his pro-growth agenda was largely eclipsed by the SEC breach and the Equifax scandal, in which hackers stole the personal data of about 143 million customers.