ALLSTATE CORP

The preparation of financial statements in conformity with GAAP requires management to adopt accounting policies and make estimates and assumptions that affect amounts reported in the consolidated financial statements. The most critical estimates, presented in the order they appear in the Consolidated Statements of Financial Position, include those used in determining:

•Fair value of financial assets

•Impairment of fixed income securities with credit losses

•Evaluation of goodwill

•Reserve for property and casualty insurance claims and claims expense estimation

•Pension and other postretirement plans net costs and assumptions

In making these determinations, management makes subjective and complex judgments that frequently require estimates about matters that are inherently uncertain. Many of these policies, estimates and related judgments are common in the insurance and financial services industries; others are specific to our businesses and operations. It is reasonably likely that changes in these estimates could occur from period to period and result in a material impact on our consolidated financial statements.

A summary of each of these critical accounting estimates follows. For a more detailed discussion of the effect of these estimates on our consolidated financial statements, and the judgments and assumptions related to these estimates, see the referenced sections of this document. For a more detailed summary of our significant accounting policies, see the notes to the consolidated financial statements.

Fair value of financial assets

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. We are responsible for the determination of fair value of financial assets and the supporting assumptions and methodologies. We use independent third-party valuation service providers, broker quotes and internal pricing methods to determine fair values for each financial instrument in our financial statements.

Our valuation hierarchy prioritizes the use of observable inputs. When available, fair values are based on unadjusted quoted prices for identical assets or liabilities in an active market that we can access. If unadjusted quoted prices are not available, fair values are based on quoted prices for similar assets or liabilities in active markets, quoted prices for identical or similar assets and liabilities in markets that are not active or valuation models with observable inputs. If observable inputs are not available or determinable, unobservable inputs or adjustments to observable

inputs requiring management judgment are used to determine the estimated fair value of the investment.

For additional information on fair value measurements, see Note 7 of the consolidated financial statements and the risk factor titled “Determination of the fair value and amount of credit losses for investments includes subjective judgments and could materially impact the results of operations and financial condition” disclosed in Part 1 “Item 1A. Risk Factors’’. A more detailed discussion of investments is presented in the Investments section of the MD&A and Note 6 of the consolidated financial statements.

Impairment of fixed income securities with credit losses

For fixed income securities classified as available-for-sale, the difference between amortized cost, net of credit loss allowance (“amortized cost, net”) and fair value, net of certain other items and deferred income taxes (as disclosed in Note 6 of the consolidated financial statements), is reported as a component of AOCI on the Consolidated Statements of Financial Position and is not reflected in the operating results of any period until reclassified to net income upon the consummation of a transaction with an unrelated third party or when a credit loss allowance is recorded. We have a comprehensive portfolio monitoring process to identify and evaluate each fixed income security that may require a credit loss allowance.

For each fixed income security in an unrealized loss position, we assess whether management with the appropriate authority has made the decision to sell or whether it is more likely than not we will be required to sell the security before recovery of the amortized cost basis for reasons such as liquidity, contractual or regulatory purposes. If a security meets either of these criteria, any existing credit loss allowance would be written-off against the amortized cost basis of the asset along with any remaining unrealized losses, with the incremental losses recorded in earnings.

If we have not made the decision to sell the fixed income security and it is not more likely than not we will be required to sell the fixed income security before recovery of its amortized cost basis, we evaluate whether we expect to receive cash flows sufficient to recover the entire amortized cost basis of the security. We calculate the estimated recovery value based on the best estimate of future cash flows considering past events, current conditions and reasonable and supportable forecasts. The estimated future cash flows are discounted at the security’s current effective rate and are compared to the amortized cost of the security. The determination of cash flow estimates is inherently subjective, and methodologies may vary depending on facts and circumstances specific to the security. All reasonably available information relevant to the collectability of the security are considered when developing the estimate of cash flows expected to be collected. That information generally includes, but is not limited to, as applicable, the remaining payment terms of the security, prepayment speeds,

76 www.allstate.com the financial condition and future earnings potential of the issue or issuer, expected defaults, expected recoveries, the value of underlying collateral, origination vintage year, geographic concentration of underlying collateral, available reserves or escrows, current subordination levels, third-party guarantees and other credit enhancements. Other information, such as industry analyst reports and forecasts, sector credit ratings, and other market data relevant to the realizability of contractual cash flows, may also be considered. The estimated fair value of collateral will be used to estimate recovery value if we determine that the security is dependent on the liquidation of collateral for ultimate settlement.

If we do not expect to receive cash flows sufficient to recover the entire amortized cost basis of the fixed income security, a credit loss allowance is recorded in earnings for the shortfall in expected cash flows; however, the amortized cost, net of the credit loss allowance, may not be lower than the fair value of the security. The portion of the unrealized loss related to factors other than credit remains classified in AOCI. If we determine that the fixed income security does not have sufficient cash flow or other information to estimate a recovery value for the security, we may conclude that the entire decline in fair value is deemed to be credit related and the loss is recorded in earnings.

When a security is sold or otherwise disposed or the security is deemed uncollectible and written off, we reverse amounts previously recognized in the credit loss allowance. Recoveries after write-offs are recognized when received.

For additional detail on investment impairments, see Note 6 of the consolidated financial statements.

Evaluation of goodwill

Goodwill impairment testing The Company performs its annual goodwill impairment testing at the reporting unit level during the fourth quarter of each year based upon data as of the close of the third quarter. Goodwill impairment is measured and recognized as the amount by which a reporting unit’s carrying value, including goodwill, exceeds its fair value, not to exceed the carrying amount of goodwill allocated to the reporting unit. The Company also reviews goodwill for impairment whenever events or changes in circumstances, such as deteriorating or adverse market conditions, indicate that it is more likely than not that the carrying amount of the reporting unit including goodwill may exceed the fair value of the reporting unit.

Fair value estimation process Estimating the fair value of reporting units is subjective and involves the use of significant estimates by management. Changes in market inputs or other events impacting the fair value of these businesses could result in goodwill impairments, resulting in a charge to income. Key factors influencing market inputs include changes in: (1) discount rates; (2) operating results; (3) investment returns; (4) strategies; and (5) growth rate assumptions, including the risk of loss of key customers in the Protection Services segment.

Some reporting units comprise both legacy and acquired businesses, resulting in substantial internally generated and unrecognized intangibles and fair values that significantly exceed their carrying values.

Valuation techniques Upon acquisition, the purchase price of the acquired business is assumed to be its fair value. Subsequently, we estimate the fair value of our businesses in each goodwill reporting unit by utilizing a combination of these widely accepted valuation techniques:

•Stock price and market capitalization analysis take into consideration the quoted market price of our outstanding common stock and includes a control premium, derived from relevant historical acquisition activity, in determining the estimated fair value of the consolidated entity before allocating that fair value to individual reporting units.

•Discounted cash flow analysis utilizes long term assumptions for revenues, investment income, benefits, claims, other operating expenses and income taxes to produce projections of both income and cash flows available for dividends that are present valued using the weighted average cost of capital.

•Market to book multiples represent the mean market to book multiple for selected peer companies with operations similar to each goodwill reporting unit to which the multiple is applied.

The outputs from these methods are weighted based on the nature of the business and the relative amount of market observable assumptions supporting the estimates. The computed values are then weighted to reflect the fair value estimate based on the specific attributes of each goodwill reporting unit.

For additional detail on goodwill, see Note 2 of the consolidated financial statements.

Reserve for property and casualty insurance claims and claims expense estimation

Reserves are established to provide for the estimated costs of paying claims and claims expenses under insurance policies we have issued. These reserves are an estimate of amounts necessary to settle all outstanding claims, including estimates of all expenses associated with processing and settling incurred claims as of the financial statement date.

Auto and homeowners liability losses generally take an average of about two years to settle, while auto physical damage, homeowners property and other personal lines generally have an average settlement time of less than one year. Liability losses, especially those involving litigation, can take many years to resolve. Run-off Property-Liability involves long-tail losses, such as those related to asbestos and environmental claims, which often involve substantial reporting lags and extended times to settle.

Estimating the ultimate cost of claims and claims expenses is an inherently uncertain and complex process involving a high degree of judgment and is subject to the evaluation of numerous variables.

The Allstate Corporation 77

Underwriting results are significantly influenced by estimates of property and casualty insurance claims and claims expense reserves.

The actuarial methods used to develop reserve estimates Reserve estimates are derived by using several different actuarial estimation methods that are mostly variations on one primary actuarial technique known as a “chain ladder” estimation process. In this process, historical loss patterns are applied to actual paid losses and reported losses (paid losses plus individual case reserves established by claim adjusters) for an accident year or a report year to create an estimate of how losses are likely to develop over time.

In the chain ladder estimation technique, development factors are calculated which compare current period results to results in the prior period for each accident year or report year. The effects of inflation are implicitly considered in the reserving process, as development factors use historic data that incorporates inflation from recent prior periods in estimating future loss costs. The estimation methodology may require modification when data changes due to changing claim reporting practices, changing claim settlement patterns, external regulatory or financial influences, or contractual coverage changes. Changes in such items and inflation can result in increased variability in loss costs and reserve estimates. Actuarial judgment is then applied to develop a best estimate of gross ultimate losses. These developments are discussed further in the loss ratio disclosures within the Allstate Protection Segment and the Reserve for Property and Casualty Insurance Claims and Claims Expense sections of the MD&A. See the Run-off Property-Liability reserve estimates section for specific disclosures of industry and actuarial best practices for this segment.

How reserve estimates are established and updated Reserve estimates are developed at a detailed level, and the results are aggregated to form a consolidated reserve estimate. The detailed estimates include each line of insurance, major components of

losses (such as coverages and perils), major states or groups of states for reported losses and IBNR. The significant lines of business are auto, homeowners, and other personal lines for Allstate Protection, and asbestos, environmental, and other run-off lines for Run-off Property-Liability. Reserves are established for each business segment and line of business, independently of business segment management.

Development factors are calculated for data elements such as claim counts reported and settled, paid losses, and paid losses combined with case reserves. The historical development patterns for these data elements are used to calculate reserve estimates. Based on this review, our best estimate of required reserves is recorded.

Reserves are reestimated quarterly and periodically throughout the year, by combining historical results with current actual results to calculate new development factors. This process incorporates the historic and latest actual trends, and other underlying changes in the data elements used to calculate reserve estimates. New development factors are likely to differ from previous development factors used in prior reserve estimates because actual results occur differently than the assumptions contained in the previous development factor calculations. When actual development of these data elements is different than the historical development pattern used in a prior period reserve estimate, a new reserve is determined. The difference between indicated reserves based on new reserve estimates and recorded reserves (the previous estimate) is the amount of reserve reestimate. This amount, which could be material and vary significantly from period to period, is recognized as an increase or decrease in Property and casualty insurance claims and claims expense in the Consolidated Statements of Operations.

A more detailed discussion of reserve reestimates is presented in the Reserve for Property and Casualty Insurance Claims and Claims Expense section of the MD&A.

78 www.allstate.com

(2)Each of these results is consistent within a reasonable actuarial tolerance for the respective businesses.

Allstate Protection reserve estimate

Factors affecting reserve estimates Generally, reserves are informed by analysis of historical relationships to relevant loss development indicators such as inflation. These relationships guide the initial reserve setting for a new report year or accident year using actual claim frequency and severity assumptions across business segments, lines and coverages. For prior report years or accident years, reserve estimates are developed using similar historical relationships and statistical processes on holistic loss costs. These estimates are considered in conjunction with known facts and interpretations of circumstances, including our experience with similar cases, actual claims paid, historical trends involving claim payment patterns and pending levels of unpaid claims, loss management programs, product mix and contractual terms, changes in laws and regulations, judicial decisions and economic conditions.

Changes in auto claim frequency may result from changes in mix of business, driving behaviors, miles driven or other macroeconomic factors. Changes in auto current year claim severity are generally influenced by inflation in the medical and auto repair sectors, changes in attorney represented and litigated claim behavior, the effectiveness and efficiency of our claim settlements and changes in mix of claim types. Injury claims are affected largely by medical inflation, treatment trends, attorney representation and litigation costs, while physical damage claims are affected largely by auto repair cost inflation, used car prices, length of claim resolution and the timing of receipt of third-party carrier claims.

Changes in homeowners current year claim severity are generally influenced by inflation in the cost of building materials, the cost of construction and property repair services, the cost of replacing home furnishings and other contents, the types of claims that qualify for coverage, deductibles, other economic and environmental factors and the effectiveness of our claim practices.

As loss experience for the current year develops for each type of loss, it is monitored relative to initial

assumptions until it is judged to have sufficient statistical credibility. From that point in time forward, reserves are reestimated using statistical actuarial processes to reflect the impact actual loss trends have on development factors incorporated into the actuarial estimation processes.

Loss experience and reserve variability are impacted by many factors, including but not limited to:

•Supply chain disruptions and labor shortages, changes in used car prices, labor and part cost increases, unemployment levels, changes in commuting activity and driving behavior have and may continue to lead to historical development trends being less predictive of future loss development, potentially creating additional reserve variability.

•If a legal change is expected to have a significant impact on the development of claim severity for a coverage which is part of a particular line of insurance in a specific state, judgment is applied to determine appropriate development factors that will most accurately reflect the expected impact on that specific estimate.

•If a change in economic conditions, including the impacts from existing or future U.S. tariffs, is expected to affect the cost of repairs or replacement of damaged autos or property for a particular line, coverage, or state, actuarial judgment is applied to determine appropriate development factors to use in the reserve estimate that will most accurately reflect the expected impacts on severity development.

Causes of reserve estimate uncertainty At each reporting date, the highest degree of uncertainty in estimates for most of our losses from ongoing businesses arises from claims remaining to be settled for the current accident year and the most recent preceding accident year. The greatest degree of uncertainty exists in the current accident year because the current accident year contains the greatest proportion of losses that have not been reported or settled as well as heightened uncertainty for claims that involve litigation or take longer to settle during periods of rapidly increasing loss costs but must be estimated as of the current reporting date. Most of these losses relate to damaged property such as automobiles and homes, and payments related to injuries from accidents. During the first year after the end of an accident year, a large portion of the total losses for that accident year are settled. When accident year losses paid through the end of the first year following the initial accident year are incorporated into updated actuarial estimates, the trends inherent in the settlement of claims emerge more clearly. After the second year, the losses that we pay for an accident year typically relate to claims that are more difficult to settle, such as those involving serious injuries or litigation. Private passenger auto insurance provides a good illustration of the uncertainty of future loss estimates: our typical annual percentage payout of reserves remaining at December 31 for an accident year is approximately 50% in the first year after the end

The Allstate Corporation 79 of the accident year, 20% in the second year, 10% in the third year, 10% in the fourth year, and the remaining 10% thereafter.

Potential variability in reserve estimates Reserve estimates, by their nature, are very complex to determine, subject to significant judgment, may be subject to litigation and represent estimates rather than an exact determination for each outstanding claim, including claims incurred but not reported. Accordingly, as actual claims, paid losses, and case reserve results emerge, our estimate of the ultimate cost to settle will differ from previous estimates.

The reserve liability recorded in the Consolidated Statements of Financial Position represents the aggregation of numerous analyses by each business segment, line of insurance, major types of losses (such as coverages and perils), and individual states or groups of states for reported losses and IBNR. Because of this detailed approach to our reserve analysis, there is not a single set of assumptions that determines our reserve estimates at the consolidated level or that management believes can produce a statistically credible or reliable actuarial reserve range that would be meaningful.

To develop a statistical measure of potential reserve variability, an actuarial technique (stochastic modeling) is applied to the countrywide data for paid losses combined with case reserves for each of auto liability, auto physical damage and homeowners insurance excluding catastrophes. Based on the combined historical variability of the development factors calculated for these data elements, an estimate of standard deviation around these reserve estimates is calculated within each accident year for the last twelve years for each type of loss. The variability of these reserve estimates within one standard deviation of the mean (a measure of frequency of dispersion often viewed to be an acceptable level of accuracy) is believed by management to represent a reasonable and statistically probable measure of potential variability.

Based on our products and coverages, historical experience, the statistical credibility of our extensive data and stochastic modeling of actuarial methodologies used to develop reserve estimates, we have derived standard deviations and the resulting pre-tax income for Allstate Protection reserves, excluding catastrophe losses, as shown below.

(1)Excludes reserves related to catastrophes.

Although this evaluation reflects most reasonably likely outcomes, it is possible the final outcome may fall below or above these amounts. Historical variability of reserve estimates is reported in the Reserve for Property and Casualty Insurance Claims and Claims Expense section of the MD&A.

Management believes that the reserve for property and casualty insurance claims and claims expense, net of recoverables, is appropriately established in the aggregate and adequate to cover the ultimate net cost of reported and unreported claims arising from losses which had occurred by the date of the Consolidated Statements of Financial Position based on available facts, laws and regulations.

Reserves for catastrophe losses Catastrophe losses are an inherent risk of the property and casualty insurance industry that have contributed, and will continue to contribute, to potentially material year-to-year fluctuations in our results of operations and financial position. We define a “catastrophe” as an event that produces pre-tax losses before reinsurance in excess of $1 million and involves multiple first-party policyholders, or a winter weather event that produces a number of claims in excess of a preset, per-event threshold of average claims in a specific area, occurring within a certain amount of time following the event. Catastrophes are caused by various natural events including high winds, winter storms and freezes, tornadoes, hailstorms, wildfires, tropical storms, tsunamis, hurricanes, earthquakes and volcanoes.

We are also exposed to man-made catastrophic events, such as certain types of terrorism, civil unrest, wildfires or industrial accidents. The nature and level of catastrophes in any period cannot be reliably predicted.

The estimation of claims and claims expense reserves for catastrophe losses also comprises estimates of losses from reported claims and IBNR, primarily for damage to property. In general, our estimates for catastrophe reserves are based on claim adjuster inspections and the application of historical loss development factors as described above. However, depending on the nature of the catastrophe, the estimation process can be further complicated.

For example, for hurricanes, complications could include the inability of insureds to promptly report losses, limitations placed on claims adjusting staff affecting their ability to inspect losses, determining whether losses are covered by our homeowners policy (generally for damage caused by wind or wind-driven rain) or specifically excluded coverage caused by flood, exposure to mold damage, and the effects of numerous other considerations. Additionally, the timing of a catastrophe in relation to other events, such as at or near the end of a financial reporting period, can affect the availability of information needed to estimate reserves for that reporting period. In these situations, we may need to adapt our practices to accommodate these circumstances in order to determine a best estimate of our losses from a catastrophe.

For example, to complete estimates for certain

80 www.allstate.com areas affected by catastrophes not yet inspected by our claims adjusting staff, or where we believed our historical loss development factors were not predictive, we rely on:

•Analysis of actual claim notices received compared to total PIF.

•Visual, governmental and third-party information, including aerial photos, using satellites, aircrafts and drones, area observations, and data on wind speed and flood depth to the extent available.

Reserves for Michigan and New Jersey unlimited PIP Claims and claims expense reserves include reserves for Michigan unlimited PIP coverage to insureds involved in qualifying motor vehicle accidents. The administration of this program is through the MCCA, a state-mandated, non-profit association of which all insurers actively writing automobile coverage in Michigan are members.

The process employed to estimate MCCA covered losses involves a number of activities including the comprehensive review and interpretation of MCCA actuarial reports, other MCCA members’ reports and our PIP loss trends which have increased in severity over time. A significant portion of incurred claim reserves can be attributed to a small number of catastrophic claims, and thus a large portion of the recoverable is similarly concentrated. We conduct comprehensive claim file reviews to develop case reserve type estimates of specific claims, which inform our view of future claim development and longevity of claimants. Each year, we update the actuarial estimate of our ultimate reserves and recoverables. We report our paid and unpaid claims based on MCCA requirements. The MCCA develops its own reserving estimates based on its own reserve methodologies, which may not align with our estimations. The MCCA does not provide member companies with its estimate of a company’s claim costs.

We provide similar PIP coverage in New Jersey for auto policies issued or renewed in New Jersey prior to 1991 that is administered by PLIGA. We use similar actuarial estimating techniques as for the MCCA exposures to estimate loss reserves for unlimited PIP coverage for policies covered by PLIGA. Unlimited coverage was not offered after 1991; therefore, no new claimants are being added.

For additional information related to indemnification recoverables, see Item 1 - Regulation, Indemnification Programs and Note 11 of the consolidated financial statements.

Run-off Property-Liability reserve estimates

Characteristics of Run-off exposure Our exposure to asbestos, environmental and other run-off claims arise principally from assumed reinsurance coverage written from the 1960s through the mid-1980s, including reinsurance on primary insurance written on large U.S. companies, and from direct excess commercial insurance written from 1972 through 1985, including substantial excess general liability coverages on large U.S. companies. Additional exposure stems

from direct primary commercial insurance written from the 1960s through the mid-1980s. Asbestos claims relate primarily to bodily injuries asserted by claimants who were exposed to asbestos or products containing asbestos. Environmental claims relate primarily to pollution and related clean-up costs. Other run-off claims exposures primarily relate to general liability and product liability mass tort claims, such as those for medical devices and other products, workers’ compensation claims and claims for various other coverage exposures other than asbestos and environmental.

In 1986, the general liability policy form used by us and others in the property and casualty industry was amended to introduce an “absolute pollution exclusion,” which excluded coverage for environmental damage claims, and to add an asbestos exclusion. Most general liability policies issued prior to 1987 contain annual aggregate limits for product liability coverage. General liability policies issued in 1987 and thereafter contain annual aggregate limits for product liability coverage and annual aggregate limits for all coverages. Our experience to date is that these policy form changes have limited the extent of our exposure to environmental and asbestos claim risks.

Our exposure to liability for asbestos, environmental and other run-off claims losses manifests differently depending on whether it arises from assumed reinsurance coverage, direct excess commercial insurance or direct primary commercial insurance. Direct excess commercial insurance and reinsurance involve coverage written by us for specific layers of protection above retentions and other insurance plans and largely has resulted in asbestos, environmental and mass tort claims. The nature of excess coverage and reinsurance provided to other insurers limits our exposure to loss to specific layers of protection in excess of policyholder retention on their primary insurance plans. Our exposure is further limited by the significant reinsurance that we had purchased on our direct excess business.

Our assumed reinsurance business involved writing generally small participations in other insurers’ reinsurance programs. The reinsured losses in which we participate may be a proportion of all eligible losses or eligible losses in excess of defined retentions. Of the majority of our assumed reinsurance exposure, approximately 85% is for excess of loss coverage, while the remaining 15% is for pro-rata coverage.

Our direct primary commercial insurance business comprises a cross section of policyholders engaged in many diverse business sectors throughout the country and did not include coverage to large asbestos companies.

How reserve estimates are established and updated We conduct an annual review in the third quarter to evaluate, establish and adjust as necessary, asbestos, environmental and other run-off claims reserves. Changes to reserves are recorded in the reporting period in which they are determined. Using established industry and actuarial best practices and assuming no change in the regulatory or economic

The Allstate Corporation 81 environment, this detailed and comprehensive methodology determines asbestos reserves based on assessments of the characteristics of exposure (e.g., claim activity, potential liability, jurisdiction, products versus non-products exposure) presented by individual policyholders, and determines environmental reserves based on assessments of the characteristics of exposure (e.g., environmental damages, respective shares of liability of potentially responsible parties, appropriateness and cost of remediation) to pollution and related clean-up costs. The number and cost of these claims are affected by advertising by trial lawyers seeking asbestos plaintiffs, and entities with asbestos exposure seeking bankruptcy protection as a result of asbestos liabilities, initially causing a delay in the reporting of claims, often followed by an acceleration and an increase in claims and claims expenses as settlements occur.

After evaluating our insureds’ probable liabilities for asbestos, environmental and other run-off claims, we evaluate our insureds’ coverage programs for such claims. We consider our insureds’ total available insurance coverage, including the coverage we issued. We also consider relevant judicial interpretations of policy language and applicable coverage defenses or determinations, if any.

Evaluation of both the insureds’ estimated liabilities and our exposure to the insureds depends heavily on an analysis of the relevant legal issues and litigation environment. This analysis is conducted by our specialized claims adjusting staff and legal counsel. Based on these evaluations, case reserves are established by claims adjusting staff and actuarial analysis is employed to develop an IBNR reserve, which includes estimated potential reserve development and claims that have occurred but have not been reported. As of December 31, 2025 and 2024, IBNR was 58.2% and 54.0%, respectively, of combined net asbestos and environmental reserves.

For both asbestos and environmental reserves, we also evaluate our historical direct net loss and expense paid and incurred experience to assess any emerging trends, fluctuations or characteristics suggested by the aggregate paid and incurred activity. Other run-off claims reserves are based on considerations similar to those described above, as they relate to the characteristics of specific individual coverage exposures.

Potential reserve estimate variability Establishing net loss reserves for asbestos, environmental and other run-off claims is subject to uncertainties that are much greater than those presented by other types of property and casualty claims. Among the complications are lack of historical data, long reporting delays, uncertainty as to the number and identity of insureds with potential exposure and unresolved legal issues regarding policy coverage; unresolved legal issues regarding the determination, availability and timing of exhaustion of policy limits; plaintiffs’ evolving and expanding theories of liability; availability and collectability of recoveries from reinsurance; retrospectively determined premiums and other contractual agreements; estimates of the extent and

timing of any contractual liability; the impact of bankruptcy protection sought by various asbestos producers and other asbestos defendants; and other uncertainties.

There are also complex legal issues concerning the interpretation of various insurance policy provisions and whether those losses are covered, or were ever intended to be covered, and could be recoverable through retrospectively determined premium, reinsurance or other contractual agreements. Courts have reached different and sometimes inconsistent conclusions as to when losses are deemed to have occurred and which policies provide coverage; what types of losses are covered; whether there is an insurer obligation to defend; how policy limits are determined; how policy exclusions and conditions are applied and interpreted; and whether clean-up costs represent insured property damage.

Our reserves for asbestos, environmental and other run-off exposures could be affected by tort reform, class action litigation, and other potential legislation and judicial decisions. Environmental exposures could also be affected by a change in the existing federal Superfund law and similar state statutes. There can be no assurance that any reform legislation will be enacted or that any such legislation will provide for a fair, effective and cost-efficient system for settlement of asbestos or environmental claims. We believe these issues are not likely to be resolved in the near future, and the ultimate costs may vary materially from the amounts currently recorded resulting in material changes in loss reserves. Due to the uncertainties and factors described above, management believes it is not practicable to develop a meaningful net loss reserve range. Historical variability of reserve estimates is reported in the Property and Casualty Insurance Claims and Claims Expense Reserves section of the MD&A.

Reinsurance and indemnification recoverables

Reinsurance and indemnification recoverables include an estimate of the amount of insurance claims and claims expense reserves that are ceded under the terms of the agreements, including IBNR unpaid losses. We calculate our ceded reinsurance and indemnification estimates based on the terms of each applicable agreement, including an estimate of how IBNR losses will ultimately be ceded under the agreement. We also consider other limitations and coverage exclusions under our agreements. Accordingly, our estimate of recoverables is subject to similar risks and uncertainties as our estimate of reserves for claims and claims expense. We believe the recoverables are appropriately established; however, as our underlying reserves continue to develop, the amount ultimately recoverable may vary from amounts currently recorded. We regularly evaluate the reinsurers and the respective amounts of our reinsurance recoverables, and a provision for uncollectible reinsurance recoverables is recorded, if needed. The establishment of reinsurance recoverables and the related allowance for uncollectible reinsurance is also an inherently uncertain process involving estimates. Changes in estimates

82 www.allstate.com could result in additional changes to the Consolidated Statements of Operations.

Adequacy of reserve for property and casualty insurance claims and claims expense estimates

We believe our net reserves are appropriately established based on available facts, laws and regulations and assessments of other pertinent factors and characteristics of exposure (e.g., claim activity, potential liability, jurisdiction, products versus non-products exposure) presented by individual policyholders, assuming no change in the legal, legislative or economic environment. Additionally, we rely on historical claims experience to inform the level of the recorded reserve. We derive and record a single best reserve estimate, in conformance with generally accepted actuarial standards and practices, for each line of insurance, its components (coverages and perils) and state, for reported losses and for IBNR losses, and as a result we believe that no other estimate is better than our recorded amount. Due to the uncertainties involved, the ultimate cost of losses may vary materially from recorded amounts, which are based on our best estimates.

For further discussion of these estimates and quantification of the impact of reserve estimates, reserve reestimates and assumptions, see Note 10 and Note 14 of the consolidated financial statements and the Reserve for Property and Casualty Insurance Claims and Claims Expense section of the MD&A.

Pension and other postretirement plans net costs and assumptions

Our pension and other postretirement benefit costs are calculated using various actuarial assumptions and methodologies. These assumptions include discount rates, health care cost trend rates, inflation, expected returns on plan assets, mortality and other factors. The assumptions utilized in recording the obligations under our defined benefit plans represent our best estimates, and we believe they are reasonable based on information as to historical experience and performance as well as other factors that might cause future expectations to differ from past trends. Approximately 89% of our benefit obligation relates to our U.S. qualified defined benefit pension plan.

Net costs for our defined benefit plans are recognized on the Consolidated Statements of

Operations and consist of two elements: 1) costs comprised of service and interest costs, expected return of plan assets, amortization of prior service credit and curtailment gains and losses which are reported in property and casualty claims and claims expense, operating costs and expenses, net investment income and, if applicable, restructuring and related charges and 2) remeasurement gains and losses comprised of changes in actuarial assumptions and the difference between actual and expected returns on plan assets which are recognized immediately in earnings as part of pension and other postretirement remeasurement gains and losses.

We recognize expected returns on plan assets using an unadjusted fair value method. Our policy is to remeasure our pension and postretirement plans on a quarterly basis. We immediately recognize the remeasurement of the benefit obligation and plan assets in earnings as it provides greater transparency of our economic obligations in accounting results and better aligns the recognition of the effects of economic and interest rate changes on pension and other postretirement plan assets and liabilities in the year in which the gains and losses are incurred.

Differences in actual experience and changes in other assumptions affect our pension and other postretirement obligations and expenses. Differences between expected and actual returns on plan assets affect remeasurement gains and losses. The primary factors contributing to pension and postretirement remeasurement gains and losses are: 1) changes in the discount rate used to value pension and postretirement obligations as of the measurement date; 2) differences between the expected and the actual return on plan assets; 3) changes in demographic assumptions, including mortality and participant experience; and 4) changes in lump sum interest rates and cash balance interest crediting rates used to value pension obligations as of the measurement date.

Pension and other postretirement service cost, interest cost, expected return on plan assets and amortization of prior service credits are allocated to the Allstate Protection and Protection Services segments. The pension and other postretirement remeasurement gains and losses are reported in the Corporate segment.

Impact of assumption changes to net cost for pension and other postretirement plans Remeasurement gains in 2025 primarily related to favorable asset performance compared to expected

return on plan assets, partially offset by a decrease in the liability discount rate and changes in actuarial assumptions. Remeasurement gains in 2024 primarily related to an increase in the liability discount rate and

The Allstate Corporation 83 changes in other assumptions, partially offset by unfavorable asset performance compared to expected return on plan assets.

The discount rate is based on rates at which expected pension benefits attributable to past employee service could effectively be settled on a present value basis at the measurement date. We develop the assumed discount rate by utilizing the weighted average yield of a theoretical dedicated portfolio derived from non-callable bonds and callable bonds with a make-whole provision available or callable within 12 months of maturity in the Bloomberg corporate bond universe having ratings of “AA” by S&P or “Aa” by Moody’s on the measurement date with cash flows that match expected plan benefit requirements. Significant changes in discount rates, such as those caused by changes in the credit spreads, yield curve, the mix of bonds available in the market, the duration of selected bonds and expected benefit payments, may result in volatility in pension cost. The weighted average discount rate used to measure the benefit obligation decreased to 5.52% on December 31, 2025 compared to 5.71% on December 31, 2024, resulting in remeasurement losses for 2025.

The expected long-term rate of return on plan assets reflects the average rate of earnings expected on plan assets. While this rate reflects long-term assumptions and is consistent with long-term historical returns, sustained changes in the market or changes in the mix of plan assets may lead to revisions in the assumed long-term rate of return on plan assets that may result in variability of pension cost. Differences between the actual return on plan assets and the expected long-term rate of return on plan assets are immediately

recognized through earnings at each quarterly remeasurement date. Short-term asset performance can differ significantly from the expected rate of return, especially in volatile markets. In 2025, the actual return on plan assets was higher than the expected return primarily due to higher public equity valuations and higher fixed income valuations, partially offset by lower performance-based equity valuations. In 2024, the actual return on plan assets was lower than the expected return primarily due to lower fixed income valuations driven by higher rates, partially offset by higher equity valuations.

We complete periodic evaluations of demographic information and historical experience that affects our pension and other postretirement obligations to identify any required changes to long-term actuarial assumptions and methodologies. Demographic assumptions affect both our pension and postretirement plans and include elements such as retirement rates and participation rates in our postretirement programs, among other factors.

These actuarial assumption updates affect our pension and other postretirement obligations and are incorporated into our best estimates of these assumptions. Remeasurement losses for other assumptions in 2025 primarily related to plan experience and a decrease in the long-term lump sum interest rate, partially offset by gains from an experience study completed on final average pay retirement rates. Remeasurement losses for other assumptions in 2024 primarily related to an increase in the cash balance interest crediting rate, partially offset by gains from an experience study.

See Note 17 of the consolidated financial statements for a discussion of our pension and other postretirement benefit plans and their effect on the consolidated financial statements.

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