Stan was a former Glader who was mentioned only once in The Scorch Trials.
Biography
In The Maze Runner, Stan is one of the 20 Gladers who escaped the Maze and went through the next phase.
In The Scorch Trials, Stan was presumably blown up by lighting during the thunderstorm in the Scorch along with 6 others including Winston, Jack and Tim.
Stan's name as seen engraved on the wall
Films
Stan's name is engraved on the wall untouched. Unlike the books Stan is killed in the Griever attacks. He is one of two characters to survive the first book but be killed in the first Movie, the other being Jackson