NWN - Northwest Natural Holding Co (NWN) Q4 2020 Earnings Call Transcript February, 26 2021 09:30 PM Northwest Natural Holding Company Image source: The Motley Fool. Northwest Natural Holding Co (NYSE: NWN) Q4 2020 Earnings Call Feb 26, 2021 , 11:00 a.m. ET Operator Continue reading For further details see: Northwest Natural Holding Co (NWN) Q4 2020 Earnings Call Transcript