As Of	Filer	Filing¹	For·On·As	Docs:Size	Issuer		Filing Agent

  5/4/23  Northwest Natural Holding Co.     10-Q        3/31/23   85:12M                                                             
          Northwest Natural Gas Co.
  5/4/23‡ Northwest Natural Holding Co.     8-K:2,9      5/4/23   12:854K                                                            
          Northwest Natural Gas Co.
 2/24/23  Northwest Natural Holding Co.     10-K       12/31/22  117:24M                                                             
          Northwest Natural Gas Co.
 2/24/23‡ Northwest Natural Holding Co.     8-K:2,9     2/24/23   12:865K                                                            
          Northwest Natural Gas Co.
  1/6/23  Northwest Natural Holding Co.     8-K:2,9      1/6/23   12:666K                                                            
          Northwest Natural Gas Co.
 11/8/22  Northwest Natural Holding Co.     10-Q        9/30/22   85:13M                                                             
          Northwest Natural Gas Co.
 11/8/22‡ Northwest Natural Holding Co.     8-K:2,9     11/8/22   12:915K                                                            
          Northwest Natural Gas Co.
 9/30/22  Northwest Natural Holding Co.     8-K:2,9     9/30/22   12:645K                                                            
          Northwest Natural Gas Co.
  8/4/22  Northwest Natural Holding Co.     S-8          8/4/22    4:62K                                    Donnelley … Solutions/FA 
  8/4/22  Northwest Natural Holding Co.     10-Q        6/30/22   88:13M                                                             
          Northwest Natural Gas Co.
  8/4/22‡ Northwest Natural Holding Co.     8-K:2,9      8/4/22   12:914K                                                            
          Northwest Natural Gas Co.
  5/4/22  Northwest Natural Holding Co.     10-Q        3/31/22   85:11M                                                             
          Northwest Natural Gas Co.
  5/4/22‡ Northwest Natural Holding Co.     8-K:2,9      5/4/22   12:860K                                                            
          Northwest Natural Gas Co.
  4/1/22  Northwest Natural Holding Co.     8-K:8,9      4/1/22   13:664K                                                            
 2/25/22  Northwest Natural Holding Co.     10-K       12/31/21  114:21M                                                             
          Northwest Natural Gas Co.
 2/25/22‡ Northwest Natural Holding Co.     8-K:2,9     2/25/22   12:875K                                                            
          Northwest Natural Gas Co.
 11/5/21  Northwest Natural Holding Co.     10-Q        9/30/21   94:17M                                                             
          Northwest Natural Gas Co.
 11/5/21‡ Northwest Natural Holding Co.     8-K:2,9     11/5/21   12:921K                                                            
          Northwest Natural Gas Co.
 8/13/21  Northwest Natural Holding Co.     S-3ASR      8/13/21    7:1.2M                                   Donnelley … Solutions/FA 
          Northwest Natural Gas Co.
  8/5/21  Northwest Natural Holding Co.     10-Q        6/30/21   88:14M                                                             
          Northwest Natural Gas Co.

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‡	A non-Insider-Ownership Filing that was accepted after the SEC “closed” at 5:30:00pm ET.  The legal “Filed As Of” date may be the next, or another, day.
¹	Filing/Form Types:
	8-K	Current Report — Form 8-K { Item 1: Business & Operations;  2: Financial Info;  3: Securities & Trading;  4: Accountants & Accounting;  5: Governance & Management;  6: Asset-Backed Securities;  7: Disclosures;  8: Events;  9: Financials }.
	10-K	Annual Report — Form 10-K.
	10-Q	Quarterly Report — Form 10-Q.
	S-3ASR	Automatic Shelf Registration Statement by a Well-Known Issuer — Form S-3.
	S-8	Registration Statement – Securities for an Employee Benefit Plan — Form S-8.