Lumen Technologies, Inc.

The preparation of our consolidated financial statements requires management to make estimates and assumptions that affect the reported amounts of our assets, liabilities, revenue, and expenses. Certain policies and estimates are considered critical because they involve significant judgments and assumptions and could materially impact our financial statements. These include:

•goodwill and intangible assets;

•pension and post-retirement benefits;

•loss contingencies; and

•income taxes.

While we believe our estimates are reasonable based on information available at the time they were made, actual results may differ and could be material.

Goodwill and Intangible Assets

Historically, we had a significant amount of goodwill and have intangible assets that are assessed at least annually for impairment. As of December 31, 2025, intangible assets totaled $4.5 billion (excluding goodwill and intangible assets classified as held for sale), representing 13% of our total assets. Our remaining goodwill was fully impaired or reclassified as held for sale as of December 31, 2025. The impairment analyses of these assets are considered critical because of their significance to us and our segments, the subjective nature of certain assumptions used to estimate fair value, and because it can materially impact reported results and future expense.

Allocation and Amortization

Goodwill was allocated to our reporting units within the Business and Mass Markets segments when there is a change in composition. Intangible assets acquired in business combinations — such as goodwill, customer relationships, capitalized software, trademarks, and trade names — are recorded at estimated fair value at acquisition. Other intangible assets, primarily capitalized software, not arising from business combinations are initially recorded at cost.

Intangible assets without legal, regulatory, contractual, or other limiting factors are classified as indefinite-lived and are not amortized. For finite-lived intangible assets, we amortize using the straight-line method over the following estimated lives:

•Customer relationships: 7 - 14 years

•Capitalized software: 3 - 7 years

•Other intangible assets: 9 - 20 years

The amount of future amortization expense may differ materially from current amounts, depending on the results of our annual reviews.

Goodwill

Goodwill is tested annually as of October 31, or more frequently if events or changes in circumstances indicate potential impairment. We first consider qualitative factors. If necessary, we perform a quantitative test comparing the reporting unit’s estimated fair value to its carrying amount. If fair value is lower, we record a non-cash impairment charge for the difference.

Prior to the Mass Markets Fiber-to-the-Home business divestiture, we had three reporting units for goodwill testing: Mass Markets, NA Business, and APAC. Prior to the divestiture in 2023, the EMEA region was considered its own reporting unit. Our reporting units are not discrete legal entities with discrete full financial statements. Reporting units share assets and liabilities, which are allocated based on relative revenue or EBITDA. These allocations can materially affect fair value estimates. For each reporting unit, we compare its estimated fair value of equity to the carrying value of equity that we assign to the reporting unit.

Intangible Assets

Finite-lived intangible assets are evaluated for impairment when triggering events or changes in circumstances occur.

Fair Value Estimation

Depending on the facts and circumstances, we typically estimate the fair value of our reporting units by considering either or both of (i) a discounted cash flow method and (ii) a market approach.

Discounted Cash Flow Method

Under the discounted cash flow method, we estimate fair value by calculating the present value of projected cash flows over a discrete period plus a terminal value based on normalized future cash flows.

•Cash flow projections: Derived from estimates developed from our long-range plan, informed by industry trends — including wireline-specific factors — competitive landscape, product lifecycles, operational initiatives, and capital allocation strategies. These projections consider recent historical results and are consistent with our short-term financial forecasts and long-term business strategies.

•Discount rate: Determined using a weighted average cost of capital, reflecting market participant assumptions for cost of equity and after-tax cost of debt, and incorporating risks inherent in the projections.

•Terminal value: Represents expected normalized cash flows beyond the discrete projection period.

•Uncertainty: Actual cash flows may differ significantly from projections due to inherent uncertainties.

Market Approach

Under the market approach, we estimate fair value of a reporting unit based upon market multiples applied to the reporting unit’s revenue and EBITDA, adjusted for an appropriate control premium based on recent market transactions.

•Market multiples: Derived using publicly traded companies whose services and operating characteristics are comparable to ours.

•Revenue and EBITDA: Derived using actual results and estimates and assumptions related to the forecasted results for the remainder of the year, including revenues, expenses, and the achievement of certain strategic initiatives.

•Weighting: Revenue and EBITDA multiples are weighted based on the characteristics of each reporting unit.

•Control premium: Our implied control premium is a factor used to evaluate our fair value assessment and is evaluated for reasonableness, as described in the "Reconciliation" bullet below.

Our development of fair value estimates under both the discounted cash flow method and the market approach method are subject to inherent uncertainties and rely on assumptions about industry trends, competitive conditions, product lifecycles, and capital allocation.

•Reconciliation: Estimated fair values are reconciled to our market capitalization to ensure reasonableness compared to market transactions.

Sensitivity and Risk Factors

Changes in assumptions used in the discounted cash flow method or market approach — such as asset and liability allocations — can materially affect fair value estimates, and actual results could vary significantly from our estimates and assumptions.

We perform sensitivity analyses using a range of discount rates and EBITDA multiples and believe our methods and assumptions are reasonable. However, any changes to these inputs can significantly impact whether impairment charges are required and the magnitude of those charges.

For additional information on our goodwill balances by segment and results of our impairment analyses, see Note 3 — Goodwill and Intangible Assets in Item 8.

Pension and Post-retirement Benefits

We sponsor a noncontributory qualified defined benefit pension plan (the “Combined Pension Plan”), and several non-qualified pension plans for certain eligible highly compensated employees. Non-qualified plans are excluded from the disclosures below due to their immaterial impact on consolidated results. We also provide post-retirement health care and life insurance benefits to certain eligible retirees. See Note 11 — Employee Benefits in Item 8 for detailed plan descriptions, funding status, and investment strategies.

Our obligations are based on actuarial valuations requiring significant judgment and assumptions, including discount rate, mortality rates, and expected rate of return on plan assets. We consider these estimates critical because they involve complex actuarial models and significant judgment, and small changes can materially impact our financial condition and results of operations.

Key Assumptions

In computing our pension and post-retirement health care and life insurance benefit obligations, our most significant assumptions are the discount rate and mortality rates. In computing our periodic pension expense, our most significant assumptions are the discount rate and the expected rate of return on plan assets. In computing our post-retirement benefit expense, our most significant assumption is the discount rate.

Discount rate: The discount rate reflects the rate at which obligations could be settled at year-end, determined based on a cash flow matching analysis using hypothetical yield curves from high-quality U.S. corporate bonds and projected benefit payments. This process ensures a uniform rate that produces the same present value of the estimated future benefit payments as is generated by discounting each year’s benefit payments by spot rates derived from yields on the 60th–90th percentile of high-quality bonds.

Mortality rates: Mortality assumptions help predict the expected life of plan participants and are based on published tables from the Society of Actuaries (“SOA”), which update life expectancy projections for North America. We adopt new tables immediately upon release. No updates were issued in 2025, 2024, or 2023.

Expected rate of return: The expected return on plan assets is the long-term return we anticipate earning on the plans’ assets, net of administrative expenses. The rate is determined based on the strategic allocation of plan assets and long-term risk and return forecasts for each asset class. These forecasts are primarily derived from third-party investment management organizations, to which we add a factor of 50 basis points to reflect the benefit we expect to result from our active management of the assets. The rate is reviewed annually by management and our Board of Directors and adjusted as needed for market or investment strategy changes.

These assumptions are based on future events and are inherently uncertain, actual results may differ materially from estimates. Management monitors these assumptions regularly and updates them based on market conditions, plan experience, and other relevant factors.

Actuarial Losses and Gains

Actuarial gains and losses arise when actual experience differs from these assumptions or when assumptions are updated. These gains and losses are recorded in Other Comprehensive Income and amortized into earnings over time.

As of January 1, 2025, the Combined Pension Plan net actuarial loss balance was $1.4 billion with 65% subject to amortization over an average remaining service period of 9 years and 35% indefinitely deferred. As of January 1, 2025 the post-retirement benefit plans net actuarial gain balance was $404 million with 75% subject to amortization and 25% indefinitely deferred.

As of January 1, 2024 the Combined Pension Plan net actuarial loss balance was $1.4 billion with 64% subject to amortization over an average remaining service period of 13 years and 36% indefinitely deferred. As of January 1, 2024 the post-retirement benefit plans net actuarial gain balance was $337 million with 75% subject to amortization and 25% indefinitely deferred.

As of the January 1, 2023 the Combined Pension Plan net actuarial loss balance of $1.4 billion, 62% was subject to amortization over an average remaining service period of 14 years and 38% indefinitely deferred during 2023. As of January 1, 2023 the post-retirement benefit plans net actuarial gain balance was $371 million with 56% subject to amortization and 44% indefinitely deferred.

Sensitivity Analysis

Changes in any of the assumptions used could significantly affect benefit obligations and expenses. The following table illustrates the estimated impact on benefit obligations assuming a hypothetical one percentage point change in the discount rate.

Similarly, changes in mortality assumptions or asset return expectations could significantly affect net periodic benefit cost and other comprehensive income. Because these assumptions are inherently uncertain and based on future events, actual results may differ materially from estimates.

Loss Contingencies

We are involved in several potentially material legal proceedings, as described in Note 17 — Commitments, Contingencies and Other Items in Item 8. Accounting for these matters requires significant judgment due to inherent uncertainty, complex legal interpretations, and evolving circumstances. We recognize an expense when a loss is probable and reasonably estimable. Determining whether a loss is probable and reasonably estimable involves significant judgment and assumptions about future events. These assumptions include legal interpretations, regulatory developments, and estimates of potential exposure. Actual outcomes may differ from these estimates, and such differences could materially affect our consolidated financial statements. Changes in assumptions or new developments could significantly increase or decrease earnings.

We evaluate these and other pending or threatened tax and legal matters on a quarterly basis.

Given the significant judgment, inherent complexity, uncertainty of outcomes, varying internal and external factors, and overall potential to materially impact our financial results, we consider various aspects related to income taxes to be critical accounting estimates.

Uncertain Tax Positions

We apply the “more-likely-than-not” threshold when determining uncertain tax positions. This involves significant uncertainty because it requires management to apply judgment and make assumptions when estimating exposures related to various tax positions. We do not recognize any portion of an uncertain tax position if, in our judgment, the position has less than a 50% likelihood of being sustained. The validity of any tax position is ultimately a matter of tax law; the body of statutory, regulatory, and interpretive guidance on the application of the law is complex and often ambiguous, particularly in certain non-U.S. jurisdictions in which we operate. As such, our judgments may not be upheld, which could materially affect our consolidated financial statements. Although we believe we have adequately reserved for our uncertain tax positions, no assurance can be given that the final tax outcome of these matters will not be adverse to Lumen and exceed the amount reserved. We evaluate these tax matters on a quarterly basis.

Deferred Taxes

Our provision for income taxes includes amounts for current and deferred tax consequences. Deferred tax assets and liabilities reflect future tax effects of:

•tax credit carryforwards;

•differences between financial statement carrying values of assets and liabilities and tax basis of those assets and liabilities; and

•NOLs and other tax attribute carryforwards.

Deferred taxes are computed using enacted tax rates expected to apply in the year in which the temporary differences are expected to affect taxable income. Changes in tax rates impacting deferred income tax assets and liabilities are recognized in earnings in the period of enactment.

The measurement of deferred taxes requires significant judgment related to the realization of tax basis. We evaluate whether tax positions taken in filed returns are more likely than not to be sustained upon audit. Determining applicable tax rates and timing of reversals involves judgment about future income apportionment among jurisdictions. Changes in our practices or these judgments could materially affect our financial condition and results of operations.

Valuation Allowances

We establish valuation allowances when it is more likely than not that some or all deferred tax assets will not be realized. This assessment considers recent pre-tax earnings, forecasts of future earnings, and the timing and nature of deductions and benefits, all of which involve the exercise of significant judgment. We review valuation allowances quarterly and adjust as needed for changes in tax law, interactions with taxing authorities, developments in case law, or other relevant factors.

As of December 31, 2025, we had a valuation allowance of $328 million, primarily related to state NOLs expected to expire unused. Future changes in earnings forecasts or the nature and estimated timing of future deductions and benefits may require adjustments to valuation allowances, which could materially impact our financial condition or results of operations.

We evaluate tax matters on a quarterly basis; see Note 15 — Income Taxes in Item 8 for additional details.