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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.
INTRO Group is an Egyptian conglomerate comprised of a diverse group of companies in various fields including trading & commercial representation, oil and gas, and engineering.
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We`re a team of architects, urban planners, interior designers, structural, mechanical and electrical engineers, and landscape architects who truly believe design can, and should, meaningfully improve the wellbeing of our communities and the environment we all share.