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Feb 10, 2022 08:37AM Form SC 13G/A Northwest Natural Holdin Filed by: VANGUARD GROUP INC
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Feb 11, 2020 04:57PM Form SC 13G/A Northwest Natural Holdin Filed by: VANGUARD GROUP INC
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Nov 13, 2018 09:13AM Form SC 13G Northwest Natural Holdin Filed by: VANGUARD GROUP INC
Jan 10, 2018 10:01AM Form SC 13G/A NORTHWEST NATURAL GAS Filed by: VANGUARD GROUP INC
Feb 10, 2017 01:15PM Form SC 13G/A NORTHWEST NATURAL GAS Filed by: VANGUARD GROUP INC
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