Warren Buffett’s Berkshire Hathaway Inc. slashed its exposure to big-bank shares in the first quarter, liquidating its position in Citigroup Inc. and trimming positions in Bank of America Corp. and Capital One Financial Corp., according to a regulatory filing on Thursday.

Buffett holds steady with Apple, now 26% of Berkshire's portfolio, while trimming Bank of America, signaling cautious views on banking stocks. See more on BRK.A here.

Berkshire Hathaway eliminated its equity stake in Citigroup and pared its large holding in Bank of America while adding to its investment in Constellation Brands, according to a 13-F report with the Securities and Exchange Commission late Thursday.