Leidos Holdings, Inc.

PART II

REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

To the shareholders and the Board of Directors of Leidos Holdings, Inc.

Reston, Virginia

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Leidos Holdings, Inc. and subsidiaries (the “Company”) as of January 2, 2026 and January 3, 2025, the related consolidated statements of operations, comprehensive income, equity, and cash flows, for each of the fiscal years ended January 2, 2026, January 3, 2025, and December 29, 2023 and the related notes (collectively referred to as the "financial statements"). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Company as of January 2, 2026 and January 3, 2025, and the results of its operations and its cash flows for each of the fiscal years ended January 2, 2026, January 3, 2025, and December 29, 2023 in conformity with accounting principles generally accepted in the United States of America.

We have also audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company’s internal control over financial reporting as of January 2, 2026, based on criteria established in Internal Control — Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission and our report dated February 17, 2026, expressed an unqualified opinion on the Company’s internal control over financial reporting.

Change in Accounting Principle

As discussed in Note 3 to the financial statements, the Company has elected to change its method of accounting for cash in fiscal 2025.

Basis for Opinion

These financial statements are the responsibility of the Company’s management. Our responsibility is to express an opinion on the Company’s financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current-period audit of the financial statements that was communicated or required to be communicated to the audit committee and that (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters does not alter in any way our opinion on the financial statements, taken as a whole, and we are not, by communicating the critical audit matters below, providing a separate opinion on the critical audit matters or on the accounts or disclosures to which it relates.

Revenues – Refer to Notes 3 and 4 to the Financial Statements

Critical Audit Matter Description

The Company recognizes revenue on certain contracts with customers over time using a method that measures the extent of progress towards completion of a performance obligation, principally using a cost-input method (referred to as the cost-to-cost method). Under the cost-to-cost method, revenue is recognized based on the proportion of total costs incurred to estimated total costs-at-completion (EAC). A performance obligation's EAC includes all direct costs such as materials, labor, subcontract costs, overhead and a ratable portion of general and administrative costs. In addition, an EAC of a performance obligation includes future losses estimated to be incurred on onerous contracts, as and when known. The accounting for

PART II

these contracts involves judgment, particularly as it relates to the process of estimating total revenues and costs for the performance obligation.

Given the judgments necessary to determine whether multiple promises within a single contract represent a single performance obligation, whether or not the Company is acting as principal in the fulfillment of the identified performance obligations on certain contracts, and estimates of total revenues and costs for the performance obligations that recognize revenue using the cost-to-cost method, auditing such accounting conclusions and estimates required extensive audit effort due to the volume and complexity of these contracts and a high degree of auditor judgment when performing audit procedures and evaluating the results of those procedures.

How the Critical Audit Matter Was Addressed in the Audit

Our audit procedures related to management’s conclusions regarding the number of performance obligations within a single contract, the Company's position as an agent or principal for a performance obligation, and estimates of total revenues and costs for the performance obligations that recognize revenue using the cost-to-cost method included the following, among others:

u We tested the effectiveness of controls over contract revenue, including management’s controls over evaluating the revenue recognition methodology, initial setup of new contract arrangements, and estimates of total costs and revenues for identified performance obligations.

u We developed an expectation of revenue based on the Company’s historical margin performance and costs incurred in the current year, then compared it to the recorded balance.

u For a selection of contracts, we performed audit procedures based on certain characteristics of audit interest, which included some of the following:

u Evaluated the terms and conditions of selected contracts and the appropriateness of the accounting treatment in accordance with accounting principles generally accepted in the United States of America, by:

u Inspection of the executed contract to assess that the facts on which management’s conclusions were reached were consistent with the actual terms and conditions of the contract.

u Evaluation of the contract within the context of the revenue recognition model to assess whether management’s conclusions were appropriate. We evaluated the nature of the promises within the contract, the interrelationship of the promised services and/or products provided, the pattern by which obligations are fulfilled, the number of performance obligations identified, and whether or not the Company is acting as principal in the fulfillment of the identified performance obligations.

u Evaluation of the appropriateness and consistency of the methods and assumptions used by management to develop estimates of future revenues that will be recognized and costs that will be incurred.

u Evaluate the mathematical accuracy of management’s calculation of revenue for the performance obligation.

u We analyzed impacts to income before income tax recorded during the year as a result of changes in estimates on contracts and tested those with characteristics of audit interest to determine that the adjustments were the result of changes in facts and circumstances and not estimates that were previously inaccurate.

/s/Deloitte & Touche LLP

McLean, Virginia

February 17, 2026

We have served as the Company’s auditor since fiscal 2000.