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Northwest Natural Holding Co
250 SW Taylor Street
Phone: (503) 226-4211p:503 226-4211 Portland, OR  97204  United States Ticker: NWNNWN
Business Summary
Northwest Natural Holding Company, through its subsidiaries, provides critical energy and delivers water and wastewater services to nearly one million meters across seven states. The Company’s segments include NWN Gas Utility, SiEnergy, and NWN Water. The NWN Gas Utility segment is a regulated utility servicing customers in Oregon and southwest Washington and includes the portion of the Mist underground storage facility used to serve its customers, the North Mist gas storage expansion in Oregon, and NWN Gas Reserves. SiEnergy Gas Utility segment is a regulated natural gas distribution utility and serves residential and commercial customers in the greater metropolitan areas of Houston, Dallas, and Austin, Texas. SiEnergy Gas Utility also serves several transmission customers in Dallas and Austin, Texas. NWN Water Utility is a regulated water and wastewater utility serving residential and commercial customers in Oregon, Washington, Idaho, Texas, and Arizona.

Scores and Ratings
FRISK®
Score		 Z''
Score		 PAYCE®
Score		 DBT
Index		 Moody's
Rating		 Fitch
Rating		 DBRS
Rating
YesYes-Yes---

Financials, News and Filings
Latest
Statement		 Last
Audit
News		 SEC
Filings		 Bankruptcy
Filings		 Suit &
Judgment
Filings		 Tax
Lien
Filings
9/30/202512/31/2024YesYes-Yes-

Industries
SIC Code Description
4924 Natural gas distribution
4941 Water supply
6719 Offices of holding companies, not elsewhere classified
4959 Sanitary services, not elsewhere classified
4952 Sewerage systems

Officers and Directors

Title
Name
Age		 Title
Date		 Start
Date
Non-Executive Independent Chairman of the Board Malia H.Wasson 66 1/1/2022 1/1/2014
President, Chief Executive Officer, Director Justin B.Palfreyman 46 4/1/2025 1/1/2016
Senior Vice President, Chief Financial Officer Raymond J.Kaszuba 45 8/31/2024 8/31/2024
12 additional Officers and Directors records available in full report.

Subsidiaries
Business Name Address City State/Province Country
Rose Valley Water Co, Inc. PO Box 1444 Green Valley AZ United States
Truxton Canyon Water Company Inc. 7313 E. Concho Drive Kingman AZ United States
Far West Water & Sewer Co 13157 E 44th St Yuma AZ United States
12 additional Subsidiary records available in full report.

Business Names
Business Name
Avimor Water Reclamation Company, LLC
Bents Court Water Company, LLC
Blue Diamond Infrastructure, LLC
62 additional Business Names available in full report.

General Information
Number of Employees: 1,275 (As of 12/31/2024)
Outstanding Shares: 41,507,042 (As of 10/24/2025)
Shareholders: 3,808
Stock Exchange: NYSE
Federal Tax Id: 930256722
Email Address: investorinformation@nwnatural.com


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Thursday, January 29, 2026