Today, the Q4 13-F season begins (and ends tomorrow) and while we will have a comprehensive summary of what hedge funds did in the fourth quarter (which ended 45 days ago), we start our reporting with what the grand daddy of all modern day hedge funds, Warren Buffett's Berkshire Hathaway, did.

Which actually was very little: the reported value of Berkshire's long-only equity portfolio rose modestly from $296BN to $299BN, with only modest underlying changes.

Here are the most notable ones:

Remarkably, for the first time in years, Berkshire neither added new position nor fully liquidated existing holdings in the fourth quarter.

As of Dec 31, Berkshire's largest position remains Apple at 895.1 million shares or $116.3 billion as of Dec 31. Other top 5 holdings are:

Full details of all Berkshire Q4 moves can be found in the table below.

Soruce: SEC Edgar