Established in 2001, Andrew Edlin Gallery gained early recognition exhibiting the works of both emerging and seminal self-taught American artists, and European art brut masters. In 2006, the gallery was awarded exclusive representation of the Henry Darger Estate. 

In subsequent years, AEG has championed significant yet under-recognized artists from the 20th and 21st centuries and has steadily produced critically acclaimed exhibitions featuring the works of both trained and untrained artists, including Thornton Dial, Ralph Fasanella (estate), Eugene Von Bruenchenhein (estate), Marcel Storr (estate), Beverly Buchanan (estate), Paulina Peavy (estate), Spain Rodriguez (estate), Joe Coleman, Tom Duncan, Karla Knight, Terence Koh, Dan Miller, Esther Pearl Watson, Melvin Way , George Widener and Domenico Zindato. Committed to documentation and research, AEG has produced publications for Darger, Dial, Duncan, Fasanella, Von Bruenchenhein, Storr, Knight, Peavy, and Zindato, and is in the midst of a major monograph project for Buchanan.

AEG has participated in Art Basel Miami Beach, Paris+ Par Art Basel, the Armory Show, Frieze (NY and LA), FIAC, Art Brussels, The Art Show (ADAA), Independent and the Outsider Art Fair, among other art fairs. The gallery is a member of the Art Dealers Association of America.

In 2012, Andrew Edlin’s satellite company, Wide Open Arts, acquired the Outsider Art Fair and has been its sole owner since that time.