Amplitude is trading at $14.99, 12.71% up after hours on September 28, with no company announcement or earnings release identified to explain the move.
- The regular-session close was $13.30.
- Reuters reported the S&P 500 fell 0.54% and the Nasdaq fell 0.60%, amid elevated oil prices, Treasury yields and uncertainty over Iran negotiations. That risk-off backdrop does not explain Amplitude’s sharp move higher.