Author Bio Eric has been writing about stocks and finance since the mid-1990s, when he lived in Prague, Czech Republic. Over the course of a varied career, he has also been a radio newscaster, an investment banker, and a bass player in a selection of rock and roll bands. A native New Yorker, he currently lives in Los Angeles. One of the most anticipated and closely scrutinized regulatory documents has been filed: Berkshire Hathaway's (NYSE:BRK.A)(NYSE:BRK.B) 13F. This is the quarterly breakdown of the Warren Buffett-led company's considerable holdings in publicly traded companies. As ever, at the end of the first quarter, the constantly shifting Berkshire portfolio saw some changes from the preceding quarter, several of which were quite dramatic. On the whole when making a quarter-over-quarter comparison, the company did more selling than buying.