Simplify the following text for a Grade 8 native English-speaking person.
Original: As of 2003 , the company was run by his son Jamling Tenzing Norgay , who himself reached the summit of Everest in 1996 .
Simplified: As of 2003 the company was run by his son Jamling Tenzing Norgay , who himself reached the summit of Everest in 1996 .