Magnus Carlsen has basically won everything this year, so that he (at least) shared first isn't surprising. And considering how competitive Hikaru Nakamura has been in rapid time controls, especially this year, his share of first in this elite Chess960 event isn't much of a surprise, either.
Next up, another St. Louis club-sponsored event: the 2020 St. Louis Rapid and Blitz (but played online). It starts Tuesday and runs through Saturday, and - unfortunately for Carlsen - Garry Kasparov won't be playing, so at least for now Kasparov gets to keep his lifetime plus against Carlsen in official games. Here's who is playing:
Magnus Carlsen, Hikaru Nakamura, Wesley So, Ian Nepomniachtchi, Alexander Grischuk, Levon Aronian, Leinier Dominguez, Alireza Firouzja, Pentala Harikrishna, and Jeffery Xiong.
It's a triple round-robin: three days with three rounds each of 25'+5" games, then two days with nine 5'+3" games per day.