Warren Buffett recently announced he had amassed 5.4% of IBM — without telling anybody for months. The only hint until recently was an obscure footnote in Berkshire Hathaway‘s Security and Exchange Commission’s form 13(f) “Confidential information has been omitted..and filed separately with the commission”. (International Herald Tribune, 11/16/2011). What! How is that fair? Read more in Forbes here.
