Berkshire Hathaway Inc (BRK.B)

[gfp927z]

Bar1080, Buffet's original approach was great, but it appears that his small/mid cap acquisition binge only began in earnest around 2014 (since 31 of his 65 fully owned small/mid companies were bought in 2014).

This represents a huge break with his time tested business model for Berkshire. On the plus side, all these small/mid caps likely represent only a fairly small amount of Berkshire's market cap. But that percentage is increasing, as evidenced by his $37 bil acquisition of Precision Castparts in 2015.

Hopefully Buffett won't succumb to the compulsion to 'collect' companies. Collecting can be addicting and not always prudent financially. Billionaires aren't immune to compulsions, just look at Trump's compulsion to build casinos, which led to near disaster.