NasdaqCM - Delayed Quote ? USD ClearSign Technologies Corporation (CLIR) Follow Compare 0.8200 -0.0125 (-1.50%) At close: October 25 at 4:00 PM EDT 0.8397 +0.02 (+2.40%) After hours: October 25 at 5:34 PM EDT Conversations Community Insights Related Tickers BCHT Birchtech Corp. 0.7300 0.00% ? WTII Water Technologies International, Inc. 0.0008 +14.29% ? FTEK Fuel Tech, Inc. 1.0400 +1.96% ? ERII Energy Recovery, Inc. 17.82 -0.17% ? PCT PureCycle Technologies, Inc. 14.12 -1.26% ?