News of Berkshire Hathaway's (BRK.A)   (BRK.B) latest 13-F filing made the rounds last night, offering some hope to beleaguered investors as Warren Buffett, at least as of September 30, had climbed into the foxhole next to you. Of course after what markets and investors have been through over the past six weeks, this dated information may simply be that... dated.

That information acknowledged, the Oracle of Omaha's self-styled conglomerate holding company has invested a cool $4 billion in JP Morgan Chase (JPM)  , taking a 1% stake to add to the firm's 9% stake in Bank of America (BAC) . The firm had also increased its investment in Goldman Sachs (GS) , while paring back on Wells Fargo (WFC) .

I will not go over the entire 13-F with you, but I do think it noteworthy that Buffett thought to reduce his exposure across the airlines -- American (AAL) , United (UAL) , and Southwest (LUV) -- and completely exit his long position in Walmart (WMT) , while increasing Berkshire's stake in Apple (AAPL) to an incredible 25.8% of the entire portfolio.

(Apple, JP Morgan and Goldman Sachs are holdings in Jim Cramer's Action Alerts PLUS member club. Want to be alerted before Jim Cramer buys or sells AAPL, JPM or GS? Learn more now.)

(A longer version of this column appeared at 7:13 a.m. ET on Real Money, our premium site for active traders. Click here to get great columns like this from Stephen "Sarge" Guilfoyle, Jim Cramer and other experts throughout the market day.)

At the time of publication, Stephen Guilfoyle was long AAPL, JPM, WMT, and short AAPL, JPM.