PWG Anniversary Show was an annual professional wrestling event produced by Pro Wrestling Guerrilla (PWG). This event was usually held in July every year to commemorate the anniversary of PWG's debut event on July 26, 2003. There was only two instances where the event has been held in other months than July. The 2013 edition was held in August while the 2021 edition was held in September.
It was not specifically called the "anniversary show" and has undergone many names. The most common name is Threemendous, which was first used to celebrate the promotion's third anniversary in 2006. PWG has used this name for its anniversary events on a few more occasions.
The match between Aerial Express and Arrogance on night one was awarded the 2005 Southern California Match of the Year Award by SoCal Uncensored.
The match between Danielson and Generico was awarded the 2007 Southern California Match of the Year Award by SoCal Uncensored.
The three-way match between Super Smash Brothers, Future Shock and Young Bucks was awarded the 2012 Southern California Match of the Year Award by SoCal Uncensored.
The three-way match between Young Bucks, Dojo Bros and Inner City Machine Guns was awarded the 2013 Southern California Match of the Year Award by SoCal Uncensored.
The luchador six-man tag team match pitting Bandido, Flamita and Rey Horus against Black Taurus, Laredo Kid and Puma King was awarded the 2019 Southern California Match of the Year Award by SoCal Uncensored.