It's that time again where the best and brightest money managers disclose the investments they made in the first quarter with the 13F filings out. This provides us with some insight into what positions could be worth taking a look at, or worth getting rid of. Today, CNBC's Fast Money summarized some of the notable investments made by the whales of the industry.

Noteworthy Buys
Warren Buffett bought into Becton Dickinson [BDX  73.78    0.52  (+0.71%)   ] and Iron Mountain [IRM  25.36    0.88  (+3.59%)   ].

John Paulson increased his stake in Bank of America [BAC  16.35    0.01  (+0.06%)   ].
David Einhorn raised his stake in CIT [CIT  37.01    -1.34  (-3.49%)   ].

Bill Ackman added to his position in Kraft [KFT  30.55    0.52  (+1.73%)   ] , General Growth Properties [GGP  14.25    -0.25  (-1.72%)   ] and Yum![YUM  41.13    0.56  (+1.38%)   ]

Carl Icahn upped his take in Motorola [MOT  6.85    0.06  (+0.88%)   ], Genzyme [GENZ  50.87    0.44  (+0.87%)   ] and Lions Gate [LGF  6.54    -0.16  (-2.39%)   ].
Noteworthy Sells
Warren Buffett is scaling back in Gannett [GCI  16.19    0.43  (+2.73%)   ], Carmax [KMX  23.59    0.37  (+1.59%)   ].

George Soros cut his stake in Citi [C  3.86    -0.12  (-3.02%)   ] from 95 million to 10,000 and he cut his stake in gold.

John Paulson sold his take outright in Philip Morris  [PM  46.25    -0.31  (-0.67%)   ] .

Cal Icahn reduced his shares in Yahoo! [YHOO  16.27    -0.12  (-0.73%)   ] and dissolved his stake in BlockBuster [BBI  0.40    -0.005  (-1.23%)   ] and CIT Group [CIT  37.01    -1.34  (-3.49%)   ] .

Do not rely solely on the opinions of this blog or any other site when making an investment decision. Any investment could result in the risk of loss of capital. Please consider seeking professional advice before initiating your investment ideas. Disclosures: Long BAC Long C Long F Long DNDN Long GLW Long SPF