I see a lot of references to "Warren Buffett's" portfolio, but it looks like most of them are actually just Berkshire Hathaway's 13-F, although most don't reference any source. Does Warren Buffett have a personal portfolio, or is it just Berkshire Hathaway's portfolio that everyone is referring to?
If it is just Berkshire Hathaway's portfolio, why would anyone want to shadow Warren/Berkshire's buys when they can just invest in Berkshire Hathaway?
If it's not Berkshire (they both have "public" portfolios), why would Warren buy differently than Berkshire? Just different strategies when representing shareholders?