Leidos Holdings, Inc. 8-KCurrent Reports (8-K / ad hoc)

Changes / Accountants

Item 9.01. Financial Statements and Exhibits. (d) Exhibits. Exhibit No. Description 10.1* Amended and Restated Limited Liability Company Agreement of Nickel JV Ultimate Parent, LLC, dated as of October 5, 2026. 99.1 Press Release, dated October 5, 2026. 104 Cover Page Interactive Data File (embedded within the Inline XBRL document). * Certain exhibits and schedules omitted pursuant to Item 601(a)(5) of Regulation S-K. A copy of any omitted exhibit or schedule will be furnished supplementally to the SEC upon request. In addition, certain portions of this agreement have been redacted pursuant to Item 601(b)(10)(iv) of Regulation S-K. An unredacted copy of the agreement will be furnished to the SEC upon request. SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Date: October 5, 2026 LEIDOS HOLDINGS, INC. By: /s/ Henrique B. Canarim Name: Henrique B. Canarim Title: Corporate Secretary