Partnership with Pharmaceutical Company Demonstrates Strength of DLH Clinical Data Solutions

ATLANTA, Apr. 29, 2026 - DLH Holdings Corp. (NASDAQ: DLHC) ("DLH" or the "Company", a leading provider of digital transformation and cybersecurity, systems engineering and integration, and science, research and development, today announced that its partnership with a global pharmaceutical company has resulted in a successful U.S. Food and Drug Administration ("FDA") Investigational New Drug ("IND") application.

DLH was engaged by a leading provider of critical care medications in the fight against rare and complex diseases to provide expert support in preparing an IND submission for sodium thiosulfate, a compound with a diverse range of clinical applications. DLH experts were responsible for:

• Transforming and standardizing data from a Phase 2 clinical trial while ensuring full compliance with industry-leading Clinical Data Interchange Standards Consortium ("CDSIC") standards
• Serving as a data steward - mapping and standardizing hundreds of measures and implementing a fully secure, auditable data pipeline within Infinibyte®, DLH's FedRAMP-certified cloud environment
• Delivering a comprehensive suite of submission materials-including annotated case report forms ("CRFs"), Study Data Tabulation Model (SDTM) and Analysis Data Model (ADaM) datasets, tables, listings and figures, statistical analyses, and detailed reviewer guides

"DLH clinical data managers and biostatisticians demonstrated exceptional adaptability to client needs, a rigorous approach to quality and compliance, and thorough, insightful methods in our analysis of previously collected clinical data," said Jeanine Christian, DLH President, Public Health & Scientific Research. "That this customer's submission was approved by the FDA without issuing further inquiries or requests for additional data demonstrates the tremendous value that DLH brings to customers facing clinical data challenges as they look to bring lifesaving therapeutics to market."

More information on DLH's partnership is available in a recently published case study.