Berkshire Hathaway Files Holdings Report Last Update: 15-Feb-08 08:38 ET When Warren Buffett makes an investment move, the market pays close attention. That certainly makes sense considering the man is one of the greatest investors of all time. Earlier this week, Mr. Buffett made waves with a revelation that Berkshire Hathaway had offered to assume $800 billion worth of municipal bond liabilities from the three major bond insurers. Thus far, he hasn't had any takers on the offer and it's very likely that he won't since the bond insurers would essentially be giving up the best part of their businesses. This morning the market is again focused on Berkshire Hathaway after an SEC filing revealed the holding company had upped its stake in Kraft (KFT) to 8.6% as of December 31 and had made a new purchase of 1.51 million shares of drug maker GlaxoSmithKline (GSK). The 13F SEC filing also showed that Berkshire Hathaway increased its holdings of Wells Fargo (WFC), CarMax (KMX), Burlington Northern (BNI), U.S. Bancorp (USB), Johnson & Johnson (JNJ) and Sanofi Aventis (SNY). Conversely, Berkshire Hathaway's holdings of Ameriprise Financial (AMP) and Iron Mountain (IRM) were reduced. http://www.briefing.com/GeneralCont...vestor&ArticleId=NS20080215083934HeadlineHits