Sorry it skipped my mind at the time. It was a banner ad / poster on https://www.e-flux.com/journal/
I think it’s Ja from Store Norske Skriftkompani.
Very similar to Neue Haas Unica, but not quite a match (C isn't round enough, crossbar on t too narrow, etc.). The spiky headline font is custom by APFEL, but the sans doesn't appear to be one of theirs.
EDIT: Could it be as simple as Neue Haas Grotesk, with the alternate a and straight-legged R?
Also similar to Fakt.