Stan is Glader and Cook who was mentioned only once in The Scorch Trials.
Biography
In the Maze Runner film, 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. He gets blown up by lightning in the scorch trials.