NORTHWEST NATURAL GAS CO
SEC Filing List

CIK: 0000073020
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Form Description Owner/Filer Filing Agent Date Actions
8-KCurrent report filingNORTHWEST NATURAL GAS CO , Northwest Natural Holding Co 03/24/2026
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10-KAnnual report pursuant to Section 13 and...NORTHWEST NATURAL GAS CO , Northwest Natural Holding Co 02/27/2026
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8-KCurrent report filingNORTHWEST NATURAL GAS CO , Northwest Natural Holding Co 02/27/2026
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8-KCurrent report filingNORTHWEST NATURAL GAS CO , Northwest Natural Holding Co 12/16/2025
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8-KCurrent report filingNORTHWEST NATURAL GAS CO , Northwest Natural Holding Co 12/15/2025
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8-KCurrent report filingNORTHWEST NATURAL GAS CO , Northwest Natural Holding Co 11/05/2025
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10-QQuarterly report pursuant to Section 13 ...NORTHWEST NATURAL GAS CO , Northwest Natural Holding Co 11/05/2025
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8-KCurrent report filingNORTHWEST NATURAL GAS CO , Northwest Natural Holding Co 10/28/2025
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8-KCurrent report filingNORTHWEST NATURAL GAS CO , Northwest Natural Holding Co 09/02/2025
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10-QQuarterly report pursuant to Section 13 ...NORTHWEST NATURAL GAS CO , Northwest Natural Holding Co Northwest Natural Holding Co /fa08/05/2025
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