Unusual total active option classes on open include: Ambev (ABEV), Patterson-UTI (PTEN), Seres Therapeutics (MCRB), Prospect Capital (PSEC), Carnival (CCL), Airbnb (ABNB), ZoomInfo Technologies (ZI), Enovix (ENVX), Transocean (RIG), and Wal-Mart (WMT).