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NORTHWEST NATURAL GAS CO

SIC 4924 · Natural Gas Distribution
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NORTHWEST NATURAL GAS CO

CIK:0000073020|SEC Filings

ARTICLES AND BYLAWS

EX-3.2
exh32-nwngasxbylawsjuly2025.htm
Aug 5, 2025
EX-3.1
ex312024q2.htm
Aug 2, 2024
EX-3.1
a31amendedandrestatedbylaw.htm
Aug 4, 2022
EX-3.2
a32amendedandrestatedbylaw.htm
Aug 4, 2022
EX-3.C
ex3c-nw_holdingsxamendedxa.htm
Feb 25, 2022
EX-3.D
ex3d-nw_naturalxamendedxan.htm
Feb 25, 2022
EX-3.2
ex32arbylawsnwnaturalmay20.htm
Aug 5, 2021
EX-3.B
exhibit3brestatedarticleso.htm
Feb 26, 2021
EX-3.1
nwholdingsbylawamendme.htm
Apr 7, 2020
EX-3.2
nwnaturalbylawamendmen.htm
Apr 7, 2020
EX-3.1
exhibit31nwholdingsbylaws.htm
May 30, 2019
EX-3.2
exhibit32nwnaturalbylaws.htm
May 30, 2019
EX-3.1
d627653dex31.htm
Oct 1, 2018
EX-3.2
d627653dex32.htm
Oct 1, 2018
EX-3.3
d627653dex33.htm
Oct 1, 2018
EX-3.1
exhibit31.htm
Dec 22, 2017
EX-3.1
d733926dex31.htm
May 29, 2014
EX-3.1
d360532dex31.htm
May 30, 2012
EX-3.1
ex32-1.htm
Nov 4, 2011
EX-3.1
dex31.htm
Aug 6, 2008