The secret investments of Warren Buffett’s Berkshire Hathaway (NYSE:BRK) have been brought to light. What Happened: The undisclosed investments of Berkshire Hathaway have been made public. The company has reportedly invested in steelmaker Nucor (NYSE:NUE),

Berkshire purchases often boost stocks. Shares of the steel maker traded as high as $151.32 on Friday, but closed at $145.48, up 0.8%. The S&P 500 fell 0.3%. The Dow Jones Industrial Average rose 0.1%.

W arren Buffett has added new positions in Nucor NUE and UnitedHealth Group UNH, while shedding more shares of Apple AAPL and Bank of America BAC, the quarterly Form 13-F filed with the Securities and Exchange Commission revealed late yesterday.