From the article: > Berkshire’s positions were disclosed in a 13F filing with the Securities and Exchange Commission, a quarterly requirement for investors man

From the article: > Berkshire’s positions were disclosed in a 13F filing with the Securities and Exchange Commission, a quarterly requirement for investors managing more than $100 million. The report indicates the number of shares held and the value of each stake at the end of the quarter, so it isn’t clear if Mr. Buffett’s firm has continued buying the stock since the quarter ended.