Among the remaining 13 financial stocks, Berkshire already owns a few companies such as Bank of America, American Express, Citigroup, etc., as well as JP Morgan Chase, Goldman Sachs, Wells Fargo. The possibility of Buffett secretly re-entering JP Morgan Chase, Goldman Sachs, and Wells Fargo is very low, and if it is one of the top 3 holdings currently held by Berkshire, there may be buying activity through form 13F.