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Holliday Rock Co., Inc. is a prominent construction materials manufacturer based in Upland, California, with over 85 years of experience. Founded in 1937, the company operates 40 locations throughout Southern and Central California. It specializes in producing aggregates, hot mix asphalt, and ready-mix concrete, serving a variety of infrastructure, commercial, and residential projects. As one of the largest independent manufacturers in the United States, Holliday Rock is committed to safety, sustainability, and quality. The company employs around 223 people and emphasizes workforce empowerment and community engagement. It actively collaborates with industry organizations, including the Associated General Contractors of California and the National Ready Mixed Concrete Association, to promote best practices in construction.
Essential is one of the largest publicly traded water, wastewater and natural gas providers in the U.S., serving approximately 5 million people across 10 states under the Aqua and Peoples brands. Essential is committed to excellence in proactive infrastructure investment, regulatory expertise, operational efficiency and environmental stewardship. The company recognizes the importance water and natural gas play in everyday life and is proud to deliver safe, reliable services that contribute to the quality of life in the communities it serves.
United Mechanical is a prominent mechanical contractor based in San Jose, California, specializing in HVAC and plumbing systems for commercial and industrial clients. Founded in 2003 by Tom Sosine and Jon Gundersen, the company operates throughout Northern California and serves a diverse range of sectors, including biomedical, healthcare, education, and mission-critical facilities. United Mechanical is recognized as one of the top five mechanical contractors in the region by annual revenue, generating between $50 million and $100 million. The company offers a variety of services, including custom design and construction of HVAC and plumbing systems, 24/7 emergency repairs, and lifecycle management. United Mechanical focuses on technically demanding projects and emphasizes client-centric service, aiming to build lasting relationships with general contractors, developers, and property managers. With a team of over 200 employees, the company invests in talent development and advanced project management resources to ensure high-quality service delivery.
Americas Best Choice is a home improvement company that specializes in premium, low-priced, and energy-efficient products such as window replacement, door installation, and siding replacement.
The Hatch Group is a national, full service, commercial contractor that specializes in the construction of retail, hospitality, and industrial structures across the United States.