Warren Buffett is celebrating the successes of Berkshire Hathaway’s companies last year and in the 60 years since he took over a struggling New England textile company and began converting it into a massive conglomerate.

Warren Buffett's Berkshire Hathaway (BRK.A; BRK.B) reported on Saturday that fourth-quarter operating earnings surged more than 70% year-over-year. The conglomerate posted operating earnings of $14.53 billion,

Berkshire Hathaway Inc.’s operating earnings surged 71% in the fourth quarter, as higher interest rates lifted the conglomerate’s investment income.