#8 John Cena (380 days)

The start of the reign: John Cena began his third tenure with the WWE Championship when he defeated Edge in a TLC match at Unforgiven in September 2006.
The end of the reign: Cena was successful in title defences against Superstars including Umaga, Shawn Michaels, The Great Khali and Bobby Lashley. However, he was forced to vacate his championship after 380 days in October 2007 due to a torn right pectoral tendon.
Female superstar says she inspired John Cena turning heel HERE
#7 CM Punk (434 days)
The start of the reign: Three months on from losing the WWE Championship at SummerSlam 2011, CM Punk won the title for the second time in his career when he defeated Alberto Del Rio via submission at Survivor Series in November.
The end of the reign: Punk held the WWE Championship for a modern-era record 434 days, retaining it against the likes of Chris Jericho, John Cena and Daniel Bryan before losing against The Rock in January 2013 at the Royal Rumble.