Billionaire investor Warren Buffett’s Berkshire Hathaway added to holdings of Wells Fargo and US Bancorp in the first quarter as the shares traded at their lowest prices in more than a decade.

Buffett’s firm held about 302.6 million shares of San Francisco-based Wells Fargo at the end of the first quarter, compared with 290.2 three months earlier, Berkshire said in a regulatory filing.

Omaha, Neb.-based Berkshire increased its holding of US Bancorp by about 2.2 percent.