Attached files

file filename
EX-32.2 - EX-32.2 - Northwest Natural Holding Coex3222021q1.htm
EX-32.1 - EX-32.1 - Northwest Natural Holding Coex3212021q1.htm
EX-31.4 - EX-31.4 - Northwest Natural Holding Coex3142021q1.htm
EX-31.3 - EX-31.3 - Northwest Natural Holding Coex3132021q1.htm
EX-31.2 - EX-31.2 - Northwest Natural Holding Coex3122021q1.htm
EX-31.1 - EX-31.1 - Northwest Natural Holding Coex3112021q1.htm
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