<P> The seventh season of the show premiered on Friday, September 25, 2015 . Actor / investor Ashton Kutcher, music manager / CEO Troy Carter, and venture investor Chris Sacca all appeared as guest sharks . </P> <P> The ninth season of the show premiered on Sunday, October 1, 2017, with a new, modern looking set, new chairs, more space and guest shark Richard Branson . </P> <Table> <Tr> <Th> Sharks </Th> <Th_colspan="10"> Seasons </Th> </Tr> <Tr> <Th> </Th> <Th> </Th> <Th> </Th> <Th> </Th> <Th> 5 </Th> <Th> 6 </Th> <Th> 7 </Th> <Th> 8 </Th> <Th> 9 </Th> <Th> 10 </Th> </Tr> <Tr> <Td> Kevin O'Leary </Td> <Td_colspan="10"> Main </Td> </Tr> <Tr> <Td> Barbara Corcoran </Td> <Td_colspan="10"> Main </Td> </Tr> <Tr> <Td> Daymond John </Td> <Td_colspan="10"> Main </Td> </Tr> <Tr> <Td> Robert Herjavec </Td> <Td_colspan="10"> Main </Td> </Tr> <Tr> <Td> Kevin Harrington </Td> <Td_colspan="2"> Main </Td> <Td_colspan="8"> </Td> </Tr> <Tr> <Td> Mark Cuban </Td> <Td> </Td> <Td> Guest </Td> <Td_colspan="8"> Main </Td> </Tr> <Tr> <Td> Lori Greiner </Td> <Td_colspan="2"> </Td> <Td_colspan="1"> Guest </Td> <Td_colspan="7"> Main </Td> </Tr> <Tr> <Td> Jeff Foxworthy </Td> <Td> </Td> <Td> Guest </Td> <Td_colspan="8"> </Td> </Tr> <Tr> <Td> Steve Tisch </Td> <Td_colspan="4"> </Td> <Td> Guest </Td> <Td_colspan="5"> </Td> </Tr> <Tr> <Td> John Paul DeJoria </Td> <Td_colspan="4"> </Td> <Td> Guest </Td> <Td_colspan="5"> </Td> </Tr> <Tr> <Td> Nick Woodman </Td> <Td_colspan="5"> </Td> <Td> Guest </Td> <Td_colspan="4"> </Td> </Tr> <Tr> <Td> Ashton Kutcher </Td> <Td_colspan="6"> </Td> <Td> Guest </Td> <Td_colspan="2"> </Td> <Td> Guest </Td> </Tr> <Tr> <Td> Troy Carter </Td> <Td_colspan="6"> </Td> <Td> Guest </Td> <Td_colspan="3"> </Td> </Tr> <Tr> <Td> Chris Sacca </Td> <Td_colspan="6"> </Td> <Td_colspan="3"> Guest </Td> <Td> </Td> </Tr> <Tr> <Td> Richard Branson </Td> <Td_colspan="8"> </Td> <Td_colspan="1"> Guest </Td> <Td> </Td> </Tr> <Tr> <Td> Rohan Oza </Td> <Td_colspan="8"> </Td> <Td_colspan="2"> Guest </Td> </Tr> <Tr> <Td> Alex Rodriguez </Td> <Td_colspan="8"> </Td> <Td_colspan="2"> Guest </Td> </Tr> <Tr> <Td> Sara Blakely </Td> <Td_colspan="8"> </Td> <Td_colspan="2"> Guest </Td> </Tr> <Tr> <Td> Bethenny Frankel </Td> <Td_colspan="8"> </Td> <Td_colspan="2"> Guest </Td> </Tr> <Tr> <Td> Charles Barkley </Td> <Td_colspan="9"> </Td> <Td_colspan="1"> Guest </Td> </Tr> <Tr> <Td> Matt Higgins </Td> <Td_colspan="9"> </Td> <Td_colspan="1"> Guest </Td> </Tr> <Tr> <Td> Jamie Siminoff </Td> <Td_colspan="9"> </Td> <Td_colspan="1"> Guest </Td> </Tr> </Table> <Tr> <Th> Sharks </Th> <Th_colspan="10"> Seasons </Th> </Tr>

Who are all the guest sharks on shark tank
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