CEO — Zachary C. Parker: The CEO resigned from his executive position, representing a loss of the top executive, despite remaining on the board and providing consulting services.

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

President and Chief Executive Officer — Zachary C. Parker: Mr. Parker resigned as President and CEO but will continue to serve on the Board.

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

Entry into a Material Definitive Agreement. On June 11, 2026, DLH Holdings Corp. (the “Company” or “DLH”) and its direct, wholly owned subsidiaries (collectively, the “Borrowers”), entered into the Second Amendment (the “Second Amendment”) to the Second Amended and Restated Credit Agreement dated December 8, 2022 (the “Secured Credit Agreement” and, as amended by the Second Amendment, the “Amended Credit Agreement”) by and among the Borrowers, First National Bank of Pennsylvania, as administr…

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

The filing describes an amendment to the equity incentive plan and is not related to a management change.

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Results of Operations and Financial Condition. DLH Holdings Corp. (the “Company”) hereby reports certain preliminary financial information for the fiscal year ended September 30, 2025. Total debt at fiscal year-end was $131.6 million, compared to $154.6 million as of September 30, 2024, reflecting a total reduction of $23.0 million during fiscal 2025, including $10.7 million in the fourth quarter. As a result of the Company’s focus on managing its working capital, all mandatory amortization p…

Chief Executive Officer and President — Zachary C. Parker: Mr. Parker's new employment agreement with increased compensation and benefits was signed.

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Director — Martin J. Delaney: Mr. Delaney decided not to stand for reelection due to personal reasons.

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

of this Current Report, including Exhibit 99.1, shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing. Cautionary Note Regarding Forward-Loo…

Entry into a Material Definitive Agreement On November 6, 2024, DLH Holdings Corp. (the “Company” or “DLH”) and its direct, wholly owned subsidiaries (collectively, the “Borrowers”), entered into the First Amendment (the “First Amendment”) to the Second Amended and Restated Credit Agreement dated December 8, 2022 (the “Secured Credit Agreement” and, as amended by the Amendment, the “Amended Credit Agreement”) by and among the Borrowers, First National Bank of Pennsylvania, as administrative a…

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

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Chief Human Resources Officer — Mr. G. Maliek Ferebee: Resigned to pursue a new career opportunity.

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Regulation FD Disclosure In its previous filings under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), including its Quarterly Report on Form 10-Q for the fiscal quarter ended December 31, 2023, DLH Holdings Corp. (“DLH” or the “Company”) disclosed that the Department of Veterans Affairs (the “VA”) had issued a request for proposal for healthcare logistics and pharmacy services for each of its Consolidated Mail Outpatient Pharmacy (“CMOP”) locations. Accordingly, there a…

Regulation FD Disclosure In its previous filings under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), including its Quarterly Report on Form 10-Q for the fiscal quarter ended December 31, 2023, DLH Holdings Corp. (“DLH” or the “Company”) disclosed that the Department of Veterans Affairs (the “VA”) had issued a request for proposal for healthcare logistics and pharmacy services for each of its Consolidated Mail Outpatient Pharmacy (“CMOP”) locations. Accordingly, there a…

of this Current Report, including Exhibit 99.1 , shall not be deemed “filed” for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section, nor shall such information be deemed incorporated by reference into any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.