“Peter Hujar’s Day,” which premiered at this year’s Sundance, has sold to Sideshow and Janus Films. It’s one of the few projects to land a buyer out of the festival so far.

Ben Whishaw in "Peter Hujar's Day" by Ira Sachs. Credit: Sundance Institute From Ira Sachs — director of the striking contemporary queer drama Passages — the 1970s New York-set Peter Hujar's ...