Perini Management Services Awarded $48.6 Million Alcatraz Island Historic Structures Stabilization and Rehabilitation Project

Tutor Perini Corporation (NYSE: TPC) (the “Company”), a leading civil, building and specialty construction company, announced today that its subsidiary, Perini Management Services, Inc., has been awarded a contract valued at approximately $48.6 million by the National Park Service for the Alcatraz Island Historic Structures Stabilization and Rehabilitation Project. Located in the San Francisco Bay, the project will address deterioration and structural deficiencies associated with the Alcatraz Main Prison Building, which includes both interior and exterior work. The scope of work includes abatement of hazardous materials in the exterior walls and interior construction areas, repair of concrete spalls, replacement of deteriorated steel reinforcement, strengthening of unreinforced concrete foundation walls, repair and stabilization of exterior windows, and installation of storm windows. The project will provide a safe facility for the 1.4 million annual visitors and staff by increasing the building's ability to resist seismic forces and resolving aging and weather-related impacts to the exterior walls.

Work is expected to begin this month with substantial completion anticipated in the summer of 2027. The contract value was added to the Company’s backlog in the second quarter of 2024.

About Tutor Perini Corporation

Tutor Perini Corporation is a leading civil, building and specialty construction company offering diversified general contracting and design-build services to private customers and public agencies throughout the world. We have provided construction services since 1894 and have established a strong reputation within our markets by executing large, complex projects on time and within budget, while adhering to strict quality control measures. We offer general contracting, pre-construction planning and comprehensive project management services, including planning and scheduling of manpower, equipment, materials and subcontractors required for a project. We also offer self-performed construction services including site work, concrete forming and placement, steel erection, electrical, mechanical, plumbing and heating, ventilation and air conditioning (HVAC).

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Tutor Perini Corporation Jorge Casado, 818-362-8391 Vice President, Investor Relations and Corporate Communications www.tutorperini.com