Magnite is trading 5.28% down at $22.59 after no new company-specific announcement was identified for August 19, 2026.
- The latest confirmed company event was the August 18 Rosenblatt Technology Summit fireside chat on CTV growth, Google antitrust remedies, and a $200 million buyback authorization.
- Strong second-quarter results and raised outlook were released August 5, making them unlikely explanations for the after-hours decline.
- Broader markets finished higher; no clear global or sector catalyst directly explains the move.