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NORTHWEST NATURAL GAS CO (NWN) Create: Alert

All | News | Filings
Date FiledTypeDescription
03/02/2023 424B5 Form 424B5 - Prospectus [Rule 424(b)(5)]:
11/09/2021 424B5 Form 424B5 - Prospectus [Rule 424(b)(5)]:
11/08/2021 424B5 Form 424B5 - Prospectus [Rule 424(b)(5)]:
08/13/2021 424B2 Form 424B2 - Prospectus [Rule 424(b)(2)]:
03/27/2020 424B5 Form 424B5 - Prospectus [Rule 424(b)(5)]:
10/03/2018 424B2 Form 424B2 - Prospectus [Rule 424(b)(2)]:
09/06/2017 424B2 Form 424B2 - Prospectus [Rule 424(b)(2)]:
11/29/2016 424B2 Form 424B2 - Prospectus [Rule 424(b)(2)]
11/18/2016 424B3 Form 424B3 - Prospectus [Rule 424(b)(3)]
11/14/2016 424B2 Form 424B2 - Prospectus [Rule 424(b)(2)]
11/10/2016 424B5 Form 424B5 - Prospectus [Rule 424(b)(5)]
11/08/2016 424B2 Form 424B2 - Prospectus [Rule 424(b)(2)]
08/19/2011 424B2 Form 424B2 - Prospectus [Rule 424(b)(2)]
07/07/2009 424B2 Form 424B2 -- Prospectus [Rule 424(b)(2)]
03/23/2009 424B2 Form 424B2 -- Prospectus [Rule 424(b)(2)]
03/18/2009 424B2 Form 424B2 -- Prospectus [Rule 424(b)(2)]
12/13/2006 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
10/24/2005 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
06/17/2005 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
03/22/2004 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
11/19/2003 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
11/19/2003 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
02/24/2003 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
02/21/2003 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
02/21/2003 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
09/20/2002 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
03/22/2002 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
03/22/2002 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
06/22/2001 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
06/22/2001 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
11/29/2000 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
09/01/2000 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
08/31/2000 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
08/25/2000 424B3 Form 424B3 -- Prospectus [Rule 424(b)(3)]
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