Some obvious ones left out
Per blu-ray.com
http://www.blu-ray.com/movies/search.php?action=search&ultrahd=1&sortby=recentlyaddeddesc
UPDATED 6/3/24 (Page 174)
Creature horror. Updated weekly.
Giallo horror. Updated weekly.
All 4K releases in the US
Horror from the 1980's. Updated regularly.
Italian horror. Updated weekly.
Medical horror. Updated weekly.
Italian Horror, non-Giallo.
Latest 4K Remux
by G&A