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NORTHWEST PIPELINE LLC

For the period ended Mar 31, 2026. Filed May 4, 2026.

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About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Mar 31, 2026 · Filed May 4, 2026

WMB$66.45+3.7%Stored close · as of Nov 9, 2026

Extracted filing text, with the paragraph anchors used by the comparison.

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Contents

NWP

NWP - Results of Operations

Three Months Ended March 31,
2026 · $ Changefrom2025* · % Changefrom2025* · 2025
(Millions)
Revenues:
Natural gas transportation service revenues$114$+9+9%$105
Natural gas storage service revenues4——%4
Other service revenues2——%2
Total revenues120111
Costs and expenses:
Operating and maintenance expenses23-2-10%21
Depreciation and amortization expenses30-1-3%29
General and administrative expenses13——%13
Taxes, other than income taxes4——%4
Other operating (income) expense – net(5)-1-17%(6)
Total costs and expenses6561
Operating income (loss)55+5+10%50
Interest expense(8)-1-14%(7)
Allowance for equity and borrowed funds used during construction (AFUDC)2——%2
Other income (expense) – net3+2+200%1
Net income (loss)$52$+6+13%$46

Variances due to changes in natural gas prices and transportation volumes have little impact on revenues because, under our rate design methodology, the majority of overall cost of service is recovered through firm capacity reservation charges in NWP’s transportation rates.

Revenues increased primarily due to higher Natural gas transportation service revenues driven by rate increases effective April 1, 2025, and increased firm transportation revenues from new contracts executed at higher rates to replace expiring contracts.

Operating and maintenance expenses increased primarily due to higher labor costs and contracted services related to integrity assessments.

Other income (expense) – net increased primarily due to higher intercompany interest income earned on NWP’s advances to affiliates, driven by higher outstanding balances in 2026.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.