NWN

SEC source: 0001733998-25-000136 · form4.xml · nonDerivative · entry 1

Ludford Mary E · CIK 0001959466 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 2,733.122

F1 · kind: The reporting transaction was effected pursuant to a written election under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives made on or about September 13, 2024.

F2 · ownership.nature: Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives.

SEC source: 0001733998-25-000134 · form4.xml · nonDerivative · entry 1

Lee Karen · CIK 0001839510 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 19,015.904

F1 · kind: The reporting transaction was effected pursuant to a written election under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives made on or about June 1, 2021. At the time made, the election was intended to satisfy the then-current Rule 10b5-1. The election has not been entered into, modified or terminated since the original election date.

F2 · ownership.nature: Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives.

SEC source: 0001733998-25-000121 · form4.xml · nonDerivative · entry 1

ANDERSON DAVID HUGO · CIK 0001241405 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 87,291

F1 · kind: Transaction made pursuant to a Rule 10b5-1 trading plan established by the reporting person on September 16, 2024. As previously disclosed, Mr. Anderson retired from his position as CEO of NW Holdings and NW Natural, effective April 1, 2025. At the time the 10b5-1 Plan was established, Mr. Anderson held more than 8 times his annual salary in NW Holdings' stock; an amount greater than required by the NW Holdings' stock ownership requirements. This trading arrangement allows Mr. Anderson to periodically sell a portion of his NW Holdings common stock to diversify his holdings in connection with his retirement. As of the date of this filing, Mr. Anderson holds the following shares that are not subject to his trading arrangement: 47,333 shares of which 10,379 are held in Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Officers and 36,954 are held in his trust.

F2 · price: This transaction was executed in multiple trades on reported date with prices ranging from $41.63 to $42.30, resulting in a weighted average price of $41.9558. Northwest Natural Holding Company (Issuer) will provide upon request by the Commission staff or a security holder of the Issuer full information regarding the number of shares sold at each separate price.

SEC source: 0001733998-25-000113 · form4.xml · nonDerivative · entry 1

ANDERSON DAVID HUGO · CIK 0001241405 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 94,791

F1 · kind: Transaction made pursuant to a Rule 10b5-1 trading plan established by the reporting person on September 16, 2024. As previously disclosed, Mr. Anderson retired from his position as CEO of NW Holdings and NW Natural, effective April 1, 2025. At the time the 10b5-1 Plan was established, Mr. Anderson held more than 8 times his annual salary in NW Holdings' stock; an amount greater than required by the NW Holdings' stock ownership requirements. This trading arrangement allows Mr. Anderson to periodically sell a portion of his NW Holdings common stock to diversify his holdings in connection with his retirement. As of the date of this filing, Mr. Anderson holds the following shares that are not subject to his trading arrangement: 47,333 shares of which 10,379 are held in Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Officers and 36,954 are held in his trust.

F2 · price: This transaction was executed in multiple trades on reported date with prices ranging from $39.475 to $39.91, resulting in a weighted average price of $39.6815. Northwest Natural Holding Company (Issuer) will provide upon request by the Commission staff or a security holder of the Issuer full information regarding the number of shares sold at each separate price.

SEC source: 0001733998-25-000106 · form4.xml · nonDerivative · entry 1

ANDERSON DAVID HUGO · CIK 0001241405 · Director

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 102,291

F1 · kind: Transaction made pursuant to a Rule 10b5-1 trading plan established by the reporting person on September 16, 2024. As previously disclosed, Mr. Anderson retired from his position as CEO of NW Holdings and NW Natural, effective April 1, 2025. At the time the 10b5-1 Plan was established, Mr. Anderson held more than 8 times his annual salary in NW Holdings' stock; an amount greater than required by the NW Holdings' stock ownership requirements. This trading arrangement allows Mr. Anderson to periodically sell a portion of his NW Holdings common stock to diversify his holdings in connection with his retirement. As of the date of this filing, Mr. Anderson holds the following shares that are not subject to his trading arrangement: 47,333 shares of which 10,379 are held in Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Officers and 36,954 are held in his trust.

F2 · price: This transaction was executed in multiple trades on reported date with prices ranging from $40.79 to $41.72, resulting in a weighted average price of $40.9927. Northwest Natural Holding Company (Issuer) will provide upon request by the Commission staff or a security holder of the Issuer full information regarding the number of shares sold at each separate price.

SEC source: 0001733998-25-000101 · form4.xml · nonDerivative · entry 1

MCCURDY DAVID K · CIK 0001069010 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 6,354.199

F1 · kind: The reporting transaction was effected pursuant to a written election under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives made on or about Sept. 14, 2020. At the time made, the election was intended to satisfy the then-current Rule 10b5-1. The election has not been entered into, modified or terminated since the original election date.

F2 · ownership.nature: Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives.

SEC source: 0001733998-25-000103 · form4.xml · nonDerivative · entry 1

McDonough Sandra · CIK 0001901349 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 8,649.518

F1 · kind: The reporting transaction was effected pursuant to a written election under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives made on or about January 6, 2022. At the time made, the election was intended to satisfy the then-current Rule 10b5-1. The election has not been entered into, modified or terminated since the original election date.

F2 · ownership.nature: Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives.

SEC source: 0001733998-25-000097 · form4.xml · nonDerivative · entry 1

Lee Karen · CIK 0001839510 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 17,536.836

F1 · kind: The reporting transaction was effected pursuant to a written election under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives made on or about June 1, 2021. At the time made, the election was intended to satisfy the then-current Rule 10b5-1. The election has not been entered into, modified or terminated since the original election date.

F2 · ownership.nature: Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives.

SEC source: 0001733998-25-000099 · form4.xml · nonDerivative · entry 1

Ludford Mary E · CIK 0001959466 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 2,067.162

F1 · kind: The reporting transaction was effected pursuant to a written election under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives made on or about September 13, 2024.

F2 · ownership.nature: Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives.

SEC source: 0001733998-25-000088 · form4.xml · nonDerivative · entry 1

ANDERSON DAVID HUGO · CIK 0001241405 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 109,882

F1 · kind: Transaction made pursuant to a Rule 10b5-1 trading plan established by the reporting person on September 16, 2024. As previously disclosed, Mr. Anderson retired from his position as CEO of NW Holdings and NW Natural, effective April 1, 2025. At the time the 10b5-1 Plan was established, Mr. Anderson held more than 8 times his annual salary in NW Holdings' stock; an amount greater than required by the NW Holdings' stock ownership requirements. This trading arrangement allows Mr. Anderson to periodically sell a portion of his NW Holdings common stock to diversify his holdings in connection with his retirement. As of the date of this filing, Mr. Anderson holds the following shares that are not subject to his trading arrangement: 47,210 shares of which 10,256 are held in Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Officers and 36,954 are held in his trust.

F2 · price: This transaction was executed in multiple trades on reported date with prices ranging from $42.77 to $43.25, resulting in a weighted average price of $43.0007. Northwest Natural Holding Company (Issuer) will provide upon request by the Commission staff or a security holder of the Issuer full information regarding the number of shares sold at each separate price.

SEC source: 0001733998-25-000086 · form4.xml · nonDerivative · entry 1

Weber David A. · CIK 0001538965 · VP, Gas Supply · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 255.066

F1 · price: This transaction was executed in multiple trades on reported date with prices ranging from $42.28 to $42.56, resulting in a weighted average of $42.4642. Northwest Natural Holding Company (Issuer) will provide upon request by the Commission staff or a security holder of the Issuer full information regarding the number of shares sold at each separate price.

SEC source: 0001733998-25-000082 · form4.xml · nonDerivative · entry 1

ANDERSON DAVID HUGO · CIK 0001241405 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 117,382

F1 · kind: Transaction made pursuant to a Rule 10b5-1 trading plan established by the reporting person on September 16, 2024. As previously disclosed, Mr. Anderson has announced his intention to retire from his position as CEO of NW Holdings and NW Natural, effective April 1, 2025. At the time the 10b5-1 Plan was established, Mr. Anderson held more than 8 times his annual salary in NW Holdings' stock; an amount greater than required by the NW Holdings' stock ownership requirements. This trading arrangement allows Mr. Anderson to periodically sell a portion of his NW Holdings common stock to diversify his holdings in connection with his retirement. As of the date of this filing, Mr. Anderson holds the following shares that are not subject to his trading arrangement: 47,210 shares of which 10,256 are held in Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Officers and 36,954 are held in his trust.

F2 · price: This transaction was executed in multiple trades on reported date with prices ranging from $41.28 to $41.615, resulting in a weighted average price of $41.4631. Northwest Natural Holding Company (Issuer) will provide upon request by the Commission staff or a security holder of the Issuer full information regarding the number of shares sold at each separate price.

SEC source: 0001733998-25-000064 · form4.xml · nonDerivative · entry 2

Palfreyman Justin · CIK 0001686243 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,171

F2 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Organization and Executive Compensation Committee certification of the payout of these performance shares was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000064 · form4.xml · nonDerivative · entry 1

Palfreyman Justin · CIK 0001686243 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 17,745

F1 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000070 · form4.xml · nonDerivative · entry 2

Saathoff MardiLyn · CIK 0001445672 · Gen'l Counsel, CCO & SVP, Reg

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,459.1235

F2 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Organization and Executive Compensation Committee certification of the payout of these performance shares was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000070 · form4.xml · nonDerivative · entry 1

Saathoff MardiLyn · CIK 0001445672 · Gen'l Counsel, CCO & SVP, Reg

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,256.1235

F1 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000058 · form4.xml · nonDerivative · entry 2

ANDERSON DAVID HUGO · CIK 0001241405 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 127,470

F2 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Organization and Executive Compensation Committee certification of the payout of these performance shares was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000058 · form4.xml · nonDerivative · entry 1

ANDERSON DAVID HUGO · CIK 0001241405 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 133,340

F1 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000072 · form4.xml · nonDerivative · entry 2

Weber David A. · CIK 0001538965 · VP, Gas Supply · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,438.0666

F2 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Organization and Executive Compensation Committee certification of the payout of these performance shares was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000072 · form4.xml · nonDerivative · entry 1

Weber David A. · CIK 0001538965 · VP, Gas Supply · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,001.066

F1 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000076 · form4.xml · nonDerivative · entry 2

WILSON BRODY J · CIK 0001571275 · VP, Treas, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,728

F3 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Organization and Executive Compensation Committee certification of the payout of these performance shares was reported on Form 4 filed on February 28, 2025.

F2 · balance_after: Includes 3,258 time-based restricted stock units granted under Issuer's Long Term Incentive Plan. The restricted stock units vest in three equal installments on each of September 1, 2025, 2026 and 2027.

SEC source: 0001733998-25-000076 · form4.xml · nonDerivative · entry 1

WILSON BRODY J · CIK 0001571275 · VP, Treas, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,291

F1 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 28, 2025.

F2 · balance_after: Includes 3,258 time-based restricted stock units granted under Issuer's Long Term Incentive Plan. The restricted stock units vest in three equal installments on each of September 1, 2025, 2026 and 2027.

SEC source: 0001733998-25-000068 · form4.xml · nonDerivative · entry 2

RUSH KIMBERLY HEITING · CIK 0001629836 · SVP & COO · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,965.6531

F2 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Organization and Executive Compensation Committee certification of the payout of these performance shares was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000068 · form4.xml · nonDerivative · entry 1

RUSH KIMBERLY HEITING · CIK 0001629836 · SVP & COO · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 23,917.6531

F1 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000074 · form4.xml · nonDerivative · entry 2

Williams Kathryn M · CIK 0001772924 · VP, Chief PA & Sustainability · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,354

F2 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Organization and Executive Compensation Committee certification of the payout of these performance shares was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000074 · form4.xml · nonDerivative · entry 1

Williams Kathryn M · CIK 0001772924 · VP, Chief PA & Sustainability · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,861

F1 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 28, 2025.

SEC source: 0001733998-25-000062 · form4.xml · nonDerivative · entry 1

Kravitz Zachary D · CIK 0001940844 · VP, Regulatory Affairs and · Resource Planning, NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,567.8483

F1 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 28, 2025.

F2 · balance_after: Includes 60 time-based RSUs granted under Issuer's Long Term Incentive Plan. The RSUs vest on March 1, 2026.

SEC source: 0001733998-25-000066 · form4.xml · nonDerivative · entry 2

Rogers Melinda B. · CIK 0001748944 · VP, Chief HR & Diversity Off. · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,168.13

F3 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of performance shares. Organization and Executive Compensation Committee certification of the payout of these performance shares was reported on Form 4 filed on February 28, 2025.

F2 · balance_after: Includes 651 time-based restricted stock units granted under Issuer's Long Term Incentive Plan. The restricted stock units vest on March 1, 2026.

SEC source: 0001733998-25-000066 · form4.xml · nonDerivative · entry 1

Rogers Melinda B. · CIK 0001748944 · VP, Chief HR & Diversity Off. · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,249.13

F1 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 28, 2025.

F2 · balance_after: Includes 651 time-based restricted stock units granted under Issuer's Long Term Incentive Plan. The restricted stock units vest on March 1, 2026.

SEC source: 0001733998-25-000060 · form4.xml · nonDerivative · entry 1

Karney Joseph S · CIK 0001972619 · VP, Eng & Utility Operations · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,969.2678

F1 · shares: Shares were withheld by the issuer to cover withholding taxes on issuance of shares due to vesting of restricted stock units. Organization and Executive Compensation Committee certification of satisfaction of the performance threshold and vesting for these restricted stock units was reported on Form 4 filed on February 28, 2025.

F2 · balance_after: Includes 54 time-based RSUs granted under Issuer's Long Term Incentive Plan. The RSUs vest on March 1, 2026.

SEC source: 0001733998-25-000052 · form4.xml · nonDerivative · entry 1

MCCURDY DAVID K · CIK 0001069010 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 6,002.788

F1 · kind: The reporting transaction was effected pursuant to a written election under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives made on or about Sept. 14, 2020. At the time made, the election was intended to satisfy the then-current Rule 10b5-1. The election has not been entered into, modified or terminated since the original election date.

F2 · ownership.nature: Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives.

SEC source: 0001733998-25-000050 · form4.xml · nonDerivative · entry 1

Ludford Mary E · CIK 0001959466 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 1,481.479

F1 · kind: The reporting transaction was effected pursuant to a written election under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives made on or about September 13, 2024.

F2 · ownership.nature: Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives.

SEC source: 0001733998-25-000054 · form4.xml · nonDerivative · entry 1

McDonough Sandra · CIK 0001901349 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 8,005.909

F1 · kind: The reporting transaction was effected pursuant to a written election under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives made on or about January 6, 2022. At the time made, the election was intended to satisfy the then-current Rule 10b5-1. The election has not been entered into, modified or terminated since the original election date.

F2 · ownership.nature: Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives.

SEC source: 0001733998-25-000048 · form4.xml · nonDerivative · entry 1

Lee Karen · CIK 0001839510 · Director

10b5-1 filing: No plan indicated

Ownership: Indirect · See Footnote

Disclosed balance after: 16,378.341

F1 · kind: The reporting transaction was effected pursuant to a written election under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives made on or about June 1, 2021. At the time made, the election was intended to satisfy the then-current Rule 10b5-1. The election has not been entered into, modified or terminated since the original election date.

F2 · ownership.nature: Shares have been credited to reporting person's account under Northwest Natural Gas Company's Deferred Compensation Plan for Directors and Executives.

SEC source: 0001733998-25-000056 · form4.xml · nonDerivative · entry 1

ANDERSON DAVID HUGO · CIK 0001241405 · Director · CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 138,378

F1 · kind: Transaction made pursuant to a Rule 10b5-1 trading plan established by the reporting person on September 16, 2024. As previously disclosed, Mr. Anderson has announced his intention to retire from his position as CEO, effective April 1, 2025. At the time the 10b5-1 Plan was established, Mr. Anderson held more than 8 times his annual salary in NW Holdings' stock; an amount greater than required by NW Holdings' stock ownership requirements. This trading arrangement allows Mr. Anderson to periodically sell a portion of his NW Holdings stock to diversify his holdings in connection with his retirement. As of March 3, 2025, Mr. Anderson holds 58,118 shares not subject to his trading arrangement of which 10,256 are held in NW Natural's Deferred Compensation Plan, 22,314 are held in his trust, and 25,548 are credited to his joint tenant account as a result of the satisfaction of performance conditions under RSU and performance share awards as reported on his Form 4 filed February 28, 2025.

F2 · price: This transaction was executed in multiple trades on reported date with prices ranging from $42.00 to $42.05, resulting in a weighted average price of $42.0051. Northwest Natural Holding Company (Issuer) will provide upon request by the Commission staff or a security holder of the Issuer full information regarding the number of shares sold at each separate price.

SEC source: 0001733998-25-000046 · form4.xml · nonDerivative · entry 1

Berge Megan H · CIK 0002058274 · Deputy General Counsel · and Corporate Secretary

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,297

F1 · shares: Common stock pursuant to restricted stock units granted under Northwest Natural Holding Company's Long Term Incentive Plan. One third of the restricted stock units shall vest on each of March 1, 2026, 2027 and 2028.

SEC source: 0001733998-25-000030 · form4.xml · nonDerivative · entry 2

Palfreyman Justin · CIK 0001686243 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,489

F2 · shares: Shares are issuable as a result of satisfaction of performance goals for 2022-2024 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date.

SEC source: 0001733998-25-000030 · form4.xml · nonDerivative · entry 1

Palfreyman Justin · CIK 0001686243 · President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,095

F1 · shares: Shares are issuable as a result of satisfaction of the performance threshold for 2024 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date.

SEC source: 0001733998-25-000036 · form4.xml · nonDerivative · entry 2

Saathoff MardiLyn · CIK 0001445672 · SVP, General Counsel & Reg

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,967.1235

F2 · shares: Shares are issuable as a result of satisfaction of performance goals for 2022-2024 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date.

SEC source: 0001733998-25-000036 · form4.xml · nonDerivative · entry 1

Saathoff MardiLyn · CIK 0001445672 · SVP, General Counsel & Reg

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 28,090.1235

F1 · shares: Shares are issuable as a result of satisfaction of the performance threshold for 2024 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date.

SEC source: 0001733998-25-000024 · form4.xml · nonDerivative · entry 2

ANDERSON DAVID HUGO · CIK 0001241405 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 153,830

F2 · shares: Shares are issuable as a result of satisfaction of performance goals for 2022-2024 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date.

SEC source: 0001733998-25-000024 · form4.xml · nonDerivative · entry 1

ANDERSON DAVID HUGO · CIK 0001241405 · Director · CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 139,771

F1 · shares: Shares are issuable as a result of satisfaction of the performance threshold for 2024 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date.

SEC source: 0001733998-25-000038 · form4.xml · nonDerivative · entry 2

Weber David A. · CIK 0001538965 · VP, Gas Supply · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,473.066

F2 · shares: Shares are issuable as a result of satisfaction of performance goals for 2022-2024 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date.

SEC source: 0001733998-25-000038 · form4.xml · nonDerivative · entry 1

Weber David A. · CIK 0001538965 · VP, Gas Supply · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,259.066

F1 · shares: Shares are issuable as a result of satisfaction of the performance threshold for 2024 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date.

SEC source: 0001733998-25-000042 · form4.xml · nonDerivative · entry 2

WILSON BRODY J · CIK 0001571275 · VP, Treas, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,763

F2 · shares: Shares are issuable as a result of satisfaction of performance goals for 2022-2024 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date.

F3 · balance_after: Includes 3,258 time-based restricted stock units granted under Issuer's Long Term Incentive Plan. The restricted stock units vest in three equal installments on each of September 1, 2025, 2026 and 2027.

SEC source: 0001733998-25-000042 · form4.xml · nonDerivative · entry 1

WILSON BRODY J · CIK 0001571275 · VP, Treas, Controller & CAO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,549

F1 · shares: Shares are issuable as a result of satisfaction of the performance threshold for 2024 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date.

F3 · balance_after: Includes 3,258 time-based restricted stock units granted under Issuer's Long Term Incentive Plan. The restricted stock units vest in three equal installments on each of September 1, 2025, 2026 and 2027.

SEC source: 0001733998-25-000034 · form4.xml · nonDerivative · entry 2

RUSH KIMBERLY HEITING · CIK 0001629836 · SVP & COO · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 25,429.6531

F2 · shares: Shares are issuable as a result of satisfaction of performance goals for 2022-2024 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date.

SEC source: 0001733998-25-000034 · form4.xml · nonDerivative · entry 1

RUSH KIMBERLY HEITING · CIK 0001629836 · SVP & COO · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 21,552.6531

F1 · shares: Shares are issuable as a result of satisfaction of the performance threshold for 2024 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date.

SEC source: 0001733998-25-000040 · form4.xml · nonDerivative · entry 2

Williams Kathryn M · CIK 0001772924 · VP, Chief PA & Sustainability · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,797

F2 · shares: Shares are issuable as a result of satisfaction of performance goals for 2022-2024 under a performance share award. Organization and Executive Compensation Committee certification of the award payout level occurred on the transaction date.

F3 · balance_after: Includes 1,028 time-based restricted stock units granted under Issuer's Long Term Incentive Plan. The restricted stock units vest on March 1, 2025.

SEC source: 0001733998-25-000040 · form4.xml · nonDerivative · entry 1

Williams Kathryn M · CIK 0001772924 · VP, Chief PA & Sustainability · NW Natural

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,583

F1 · shares: Shares are issuable as a result of satisfaction of the performance threshold for 2024 under restricted stock unit awards. Organization and Executive Compensation Committee certification of the satisfaction of the performance threshold occurred on the transaction date.

F3 · balance_after: Includes 1,028 time-based restricted stock units granted under Issuer's Long Term Incentive Plan. The restricted stock units vest on March 1, 2025.