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Apr 30, 2025 07:56AM Form SCHEDULE 13G/A Northwest Natural Holdin Filed by: BlackRock, Inc.
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Feb 9, 2023 12:17PM
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Jan 27, 2022 05:16PM Form SC 13G/A Northwest Natural Holdin Filed by: BlackRock Inc.
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Feb 11, 2020 04:57PM Form SC 13G/A Northwest Natural Holdin Filed by: VANGUARD GROUP INC
Feb 4, 2020 12:23PM
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Feb 14, 2017 03:14PM Form SC 13G/A NORTHWEST NATURAL GAS Filed by: PARNASSUS INVESTMENTS /CA
Feb 10, 2017 01:15PM
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Feb 12, 2016 04:14PM
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Feb 12, 2015 02:47PM Form SC 13G/A NORTHWEST NATURAL GAS Filed by: PARNASSUS INVESTMENTS /CA
Feb 10, 2015 02:15PM
Jan 15, 2015 02:58PM

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