The transaction for Precision Castparts, news of which emerged over the weekend, is subject to shareholder and regulatory approval, and is expected to close in the first quarter of 2016. The company will continue to do business under the Precision Castparts name and maintain its headquarters in Portland, Ore., after the deal is complete. Precision Castparts manufactures a variety of metal parts used in products like aircraft engines and gas turbines. The company reported $1.5 billion in profit for the year that ended March 29, on $10 billion in sales. It began operating under the Precision Castparts name in 1953, and employs more than 30,000 people at 155 plants worldwide. "We see a unique alignment between Warren's management and investment philosophy, and how we manage P.C.C. for the long term," Mr. Donegan of Precision Castparts said in a news release. "We believe that as part of Berkshire Hathaway, P.C.C. will be exceptionally well-positioned to support our customers' needs into the future."