Thanks. That's the list I consulted as well. If you click on "by parent company", there are actually 679 titles.
You may notice that more than half of those listed were released before 2000. So I think it is fair to presume that a lot of the older movies may need to be scanned and corrected to provide for adequate 4k quality. Which leads me to believe that 1000 Paramount pictures on UF this year is very, very ambitious, to say the least.