Results of Operations and Financial Condition On October 21, 2026 , CACI International Inc released its financial results for the first quarter fiscal year 2027 . A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on October 22, 2026 is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Results of Operations and Financial Condition On August 5, 2026 , CACI International Inc released its financial results for the fourth quarter and full year ended June 30, 2026. A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on August 6, 2026 is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Chief Operating Officer — Dr. David Young: The company appointed Dr. David Young as the Chief Operating Officer from an external position.

President, U.S. Operations — DeEtte Gray: Ms. DeEtte Gray is retiring from her role as President, U.S. Operations with an agreed transition period.

Results of Operations and Financial Condition On April 22, 2026 , CACI International Inc released its financial results for the third quarter fiscal year 2026 . A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on April 23, 2026 is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

Entry into a Material Definitive Agreement. On March 12, 2026, CACI International Inc (“CACI”), the subsidiary guarantors named therein (the “Guarantors”) and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”), entered into a second supplemental indenture (the “Second Supplemental Indenture”) to the indenture, dated as of June 2, 2025 (the “Base Indenture”), as supplemented by that first supplemental indenture (the “First Supplemental Indenture”), dated as of November 2…

Other Events. On March 9, 2026, the Company issued a press release announcing the closing of the acquisition of the Partnership. A copy of the press release is filed as Exhibit 99.1 to this Current Report on Form 8-K and is incorporated herein by reference.

Completion of Acquisition or Disposition of Assets. On March 9, 2026, CACI, Inc. - Federal (the “Purchaser”), a wholly owned subsidiary of the Company, completed the previously announced acquisition of all of the outstanding equity interests of ARKA Group, L.P. (the “Partnership”) pursuant to the terms of the Purchase Agreement and Plan of Merger, dated as of December 19, 2025 (the “Purchase Agreement”) by and among the Purchaser, the Company, solely as a guarantor, Spatium Merger Sub, LLC, a…

Entry into a Material Definitive Agreement. On March 9, 2026, CACI International Inc (the “Company”) and certain of its subsidiaries entered into Amendment No. 1 (the “Amendment”) to that certain Credit Agreement, dated as of October 30, 2024 (as amended, the “Term Loan B Credit Agreement”), with the lenders party thereto and JPMorgan Chase Bank, N.A., as administrative agent. The Amendment provides for an additional $800 million tranche of incremental term loans (the “Incremental Term B-2 Lo…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

Other Events. On February 26, 2026, CACI International Inc (the “Company”) issued a press release announcing that the Company has priced its previously announced private offering of an additional $500 million aggregate principal amount of its unsecured 6.375% Senior Notes due 2033. A copy of the press release is attached as Exhibit 99.1 to this Current Report on Form 8-K and incorporated herein by reference.

Other Events. On February 26, 2026, CACI International Inc (the “Company”) issued a press release announcing that, subject to market conditions, the Company intends to offer for sale an additional $500 million aggregate principal amount of its unsecured Senior Notes due 2033 in a private offering to eligible purchasers that is exempt from registration under the Securities Act of 1933, as amended (the “Offering”). The notes will be issued as part of the same series as the Company’s 6.375% seni…

Results of Operations and Financial Condition On January 21, 2026 , CACI International Inc released its financial results for the second quarter fiscal year 2026 . A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on January 22, 2026 is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Director — William L. Jews: The filing reports the resignation of a director and the appointment of successors to fill vacancies, which is a standard board composition update rather than a loss of senior executive management.

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information included in

Entry into a Material Definitive Agreement. On December 19, 2025, CACI, Inc. – Federal, a wholly-owned subsidiary of CACI International Inc (the “Company”), and certain of its subsidiaries (the “Sellers”) entered into Amendment No. 7 (the “Amendment”) to the Master Accounts Receivable Purchase Agreement (the “Purchase Agreement”), among CACI International Inc, as Seller Representative, the Sellers, the Company, MUFG Bank, Ltd., as administrative agent, and certain purchasers party thereto. Th…

Entry into a Material Definitive Agreement. Purchase Agreement On December 19, 2025, CACI, Inc.-Federal (the “Purchaser”), a wholly owned subsidiary of CACI International Inc (the “Company”), entered into a Purchase Agreement and Plan of Merger (the “Purchase Agreement”) by and among the Purchaser, the Company, solely as a guarantor, Spatium Merger Sub, LLC, a Delaware limited liability company and wholly owned subsidiary of the Purchaser (“Merger Sub”), ARKA Group, L.P., a Delaware limited p…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant The information included in

Entry into a Material Definitive Agreement On November 25, 2025, CACI International Inc (the “Company”) and certain of its subsidiaries entered into a Second Amended and Restated Credit Agreement with the lenders named therein and Bank of America, N.A., as administrative agent, swing line lender and letter of credit issuer (the “Second Amended and Restated Credit Agreement”). The Second Amended and Restated Credit Agreement amends and restates in its entirety that certain Amended and Restated…

Results of Operations and Financial Condition On October 22, 2025 , CACI International Inc released its financial results for the first quarter fiscal year 2026. A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on October 23, 2025 is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

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Results of Operations and Financial Condition On August 6, 2025 , CACI International Inc released its financial results for the fourth quarter and full year ended June 30, 2025. A copy of the press release announcing the financial results as well as the schedule for a conference call and webcast on August 7, 2025 is furnished as Exhibit 99.1 to this Current Report on Form 8-K.

Entry into a Material Definitive Agreement. On June 2, 2025, CACI International Inc (“CACI”), the subsidiary guarantors named therein (the “Guarantors”) and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”), entered into an indenture (the “Indenture”), pursuant to which CACI issued $1.0 billion aggregate principal amount of CACI’s 6.375% Senior Notes due 2033 (the “Notes”). The Notes are unconditionally guaranteed on a senior unsecured basis by the Guarantors. Interest…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under