Arq, Inc. (ARQ)

Last Closing Price: 3.77 (2025-12-05)

Historical Volatility (Close-to-Close) (60-Day)

Historical Volatility (Close-to-Close): The past volatility of the security over the selected time frame, calculated using the closing price on each trading day.

Arq, Inc. (ARQ) had 60-Day Historical Volatility (Close-to-Close) of 1.1541 for 2025-12-05.