Investor Presentaiton

1 Mission Critical Specialty Construction Provider with Sustainable Advantages ORION Market Credibility ► Trusted provider with decades of operating experience ► Long-term, embedded relationships ► Diverse customer base - - Federal, State, Municipal Governments (44% of 2023 Revenue) Private commercial and industrial clients (66% of 2023 Revenue) Market Leader ► Leading specialty concrete constructor in attractive Texas market Well-positioned to take advantage of $17bn Infrastructure Bill funding to ports, waterways and broader infrastructure developments ▸ Robust backlog of $762 mm with industry leaders and government customers Critical Service Provider ►Leading specialty construction services provider operating in the continental U.S., Hawaii, Alaska, Canada and the Caribbean Basin Broad range of marine construction including marine transportation, facility construction and dredging and diving services ►Leading Jones Act dredger focused in the Gulf Coast Concrete construction services including commercial, structural and industrial services High-Barriers to Entry ▸ Jones Act prohibits foreign competition from dredging in the U.S. market ► Marine specialty equipment is very expensive and requires significant upfront investment to enter market - Orion owns ~900 specialty pieces of equipment High stakes involved in complex concrete projects ང་ H ORION CO 6

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