AEROSPACE

Possible Inside Trading at Lockheed Probed: Stock market regulators are examining possible insider trading in Lockheed Corp. stock the days leading up to the announcement of a $10-billion merger with Martin Marietta Corp., officials said Friday. The Pacific Stock Exchange, which trades options on Lockheed’s common stock, examined “a handful of trades and customers” before the Aug. 30 merger announcement, spokesman Dale Carlson said. He would not discuss further details. “We did preliminary work and forwarded it to the SEC,” Carlson said.