Matt's agency selling Walking Out
A variety article on Walking Out (no Variety review yet) mentions Matt's agent CAA is handling sales for the film. I suppose for many independent films there is no meaningful production company to do that.
While the concept of agencies packaging a film with its talent (actors, director, writers) I don't know if an agency selling a film is the norm.
CAA is run by family friend Bryan Lourd and a Huvane brother, the other Huvane brother being Simon's business partner.