<P> All market capitalization figures are in USD millions . </P> <P> This list is up to date as of March 31, 2018 . Indicated changes in market value are relative to the previous quarter . </P> <Table> <Tr> <Th> Rank </Th> <Th_colspan="2"> First Quarter </Th> <Th_colspan="2"> Second Quarter </Th> <Th_colspan="2"> Third Quarter </Th> <Th_colspan="2"> Fourth Quarter </Th> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Apple Inc . 851,317 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Alphabet Inc . 717,404 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Microsoft 702,760 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> </Td> <Td> </Td> <Td> Amazon.com 700,672 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 5 </Td> <Td> </Td> <Td> Tencent 507,990 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 6 </Td> <Td> </Td> <Td> Berkshire Hathaway 492,019 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 7 </Td> <Td> </Td> <Td> Alibaba Group 470,930 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 8 </Td> <Td> </Td> <Td> Facebook 464,189 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 9 </Td> <Td> </Td> <Td> JPMorgan Chase 377,410 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> <Tr> <Td> 10 </Td> <Td> </Td> <Td> Johnson & Johnson 343,780 </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> <Td> </Td> </Tr> </Table> <Tr> <Th> Rank </Th> <Th_colspan="2"> First Quarter </Th> <Th_colspan="2"> Second Quarter </Th> <Th_colspan="2"> Third Quarter </Th> <Th_colspan="2"> Fourth Quarter </Th> </Tr>

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