NORTHWEST PIPELINE LLC

The information required by Item 402 and paragraphs (e)(4) and (e)(5) of Item 407 of Regulation S-K regarding executive compensation will be presented under the headings “Compensation Discussion and Analysis,” “Executive Compensation Tables and Other Information,” “Director Compensation For Fiscal Year 2025,” “Compensation and Management Development Committee Report,” and “Compensation and Management Development Committee Interlocks and Insider Participation” in the Proxy Statement, which information is incorporated by reference herein. Notwithstanding the foregoing, the information provided under the heading “Compensation and Management Development Committee Report” in the Proxy Statement is furnished and shall not be deemed to be filed for purposes of Section 18 of the Exchange Act, is not subject to the liabilities of that section and is not deemed incorporated by reference in any filing under the Securities Act.

The information required by Item 408(x) regarding policies and practices related to the grant of certain equity awards close in time to the release of material nonpublic information will be presented under the heading “Compensation Discussion and Analysis” in the Proxy Statement, which information is incorporated by reference herein.