Who is the longest reigning world champion in UFC?

Answer 1

Anderson Silva is the longest reigning World Champion in the UFC. He won his title in October 2006 and has defended his title for more than 6 years. Another long reigning world champion is Georges St-Pierre who won his title December 2007 and has been defending his title for more than 5 years now. GSP has successfully defended his title 8 times whereas Silva did it 10 times.

Answer 2

The list of UFC's Top 5 light heavyweight title reigns in terms of number of days in descending order is:

a. Tito Ortiz - 1260 days

b. Chuck Liddell - 770 days

c. Jon Jones - current Champ - More than 750 days as of April 2013

d. Frank Shamrock - 703 days

e. Quinton Jackson - 406 days

Tito Ortiz currently holds the record but Jon Jones, the current champ has been extremely dominant over the past 2+ years. So, if he continues like that, he may end up beating Ortiz's record.