CalPortland is a leading producer of cement, ready-mixed concrete, aggregates, and asphalt in the western United States and Canada. With a rich history extending over 130 years (founded in 1891), the company plays a crucial role in developing infrastructure, commercial, and residential projects. Acquired by Martin Marietta Materials, Inc. in 2022, CalPortland continues its legacy of providing high-quality construction materials and solutions, emphasizing sustainable practices, innovation, safety, and community engagement across its operations.
The Glendora headquarters serves as the primary administrative and strategic center for CalPortland's operations. Key functions include corporate management, strategic planning, finance, legal, human resources, and oversight of its extensive network of production and distribution facilities.
Modern office complex designed to facilitate efficient corporate operations and collaboration. While specific architectural awards are not highlighted, it's built to support a leading industrial company's administrative needs and may incorporate sustainable design elements.
The headquarters fosters a professional, results-oriented, and collaborative work environment. Core values emphasize safety, quality, customer service, integrity, and environmental stewardship, reflecting the company's long-standing industry presence and commitment to excellence.
As the nerve center for CalPortland (now part of Martin Marietta), the Glendora headquarters is crucial for policy-making, financial management, and guiding the company's strategic initiatives and operational standards across its numerous locations in the western U.S. and Canada.
CalPortland's primary operational footprint is concentrated in the western United States (including California, Oregon, Washington, Nevada, Arizona) and Western Canada (British Columbia and Alberta). While not 'global' in terms of worldwide offices, its products are fundamental to construction and infrastructure projects that are part of the broader North American and global economy. The company's extensive functions within its service territories include raw material extraction (aggregates), advanced cement manufacturing, ready-mix concrete production, asphalt paving material production, and comprehensive distribution and sales networks.
2025 E. Financial Way
Glendora
California
USA
Address: 12000 N. Cement Plant Road, Rillito, AZ 85654
To efficiently produce and distribute essential cement products, meeting the construction demands of the Southwestern United States market while adhering to environmental and quality standards.
Address: 19409 National Trails Hwy, Oro Grande, CA 92368
To reliably supply the high-demand Southern California construction market with locally produced, high-quality cement, supporting regional economic growth and infrastructure development.
Address: 1600 Center Dr, DuPont, WA 98327
To supply high-quality construction aggregates and asphalt mixes to the regional market, contributing to the development and maintenance of local and state infrastructure in the Pacific Northwest.
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As of April 2025, CalPortland' leadership includes:
CalPortland has been backed by several prominent investors over the years, including:
Following CalPortland's acquisition by Martin Marietta Materials, Inc. in April 2022, executive leadership and changes are typically managed and announced within the broader Martin Marietta corporate structure. Specific, publicly announced executive hires or exits solely for the CalPortland brand in the last 12 months have not been prominent, as integration efforts usually consolidate leadership roles.
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CalPortland's email addresses typically follow standard corporate patterns, most commonly using a combination of the employee's first and last name with the @calportland.com domain. The exact format can vary.
[first_initial][last]@calportland.com (e.g., jsmith@calportland.com) or [first].[last]@calportland.com (e.g., john.smith@calportland.com)
Format
jsmith@calportland.com
Example
85%
Success rate
CalPortland News / EPA • March 11, 2024
CalPortland announced that its Mojave, CA cement plant has received the U.S. Environmental Protection Agency’s (EPA) ENERGY STAR® certification for the 15th consecutive year. This recognition highlights the plant's superior energy performance and sustained commitment to environmental stewardship and energy efficiency in its operations....more
CalPortland News • October 26, 2023
CalPortland received multiple 2023 Energy and Environment Awards from the Portland Cement Association (PCA), recognizing the company's commitment to sustainable manufacturing practices and environmental excellence at its cement plants, including the Rillito and Oro Grande facilities....more
Martin Marietta Press Release • April 29, 2022
Martin Marietta Materials, Inc. (NYSE: MLM) announced the successful completion of its acquisition of CalPortland Company. This strategic acquisition significantly expands Martin Marietta's footprint in cement, aggregates, and ready-mixed concrete in highly attractive West Coast markets....more
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