Briefly

Securities regulators investigating Berkshire Hathaway Inc.’s reinsurance units are examining transactions involving St. Paul Cos. and former subsidiaries of Prudential Financial Inc., a filing shows.

Berkshire’s General Re Corp., the largest U.S. reinsurer, briefed the Securities and Exchange Commission about the deals June 13, the Stamford, Conn.-based company said in a second-quarter filing with state insurance regulators. Two former General Re executives invoked their 5th Amendment right not to testify about the Prudential agreement, according to the filing.