Berkshire Hathaway revealed four new investments Thursday in steelmaker Nucor, insurer UnitedHealth and two of the nation’s biggest homebuilders — Lennar and DR Horton — but only one of the investments was big enough to ensure that legendary investor Warren Buffett may have handled them.

Berkshire Hathaway revealed four new investments Thursday in steelmaker Nucor, insurer UnitedHealth and two of the nation’s biggest homebuilders.

Warren Buffett has added new positions in Nucor NUE, 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 on Thursday afternoon.