Summit Materials is a leading construction materials company that supplies aggregates, cement, ready-mixed concrete and asphalt paving mix. Combining vertical integration with an interdependent company structure, we provide increased efficiencies and economies of scale while empowering operating companies to make local, well-informed decisions. By teaming up with established local businesses, we are committed to creating value, providing access to growth capital, implementing best practices and offering a safe place to work while striving to exceed our environmental and social responsibilities. Formed in 2009, Summit Materials currently has 12 platform companies in 21 states and British Columbia, Canada. Under CEO Anne Noonan, Summit Materials continues to drive growth and productivity across our operating companies, delivering shareholder value. Further information is available at www.summit-materials.com.

RES is the world’s largest independent renewable energy company, working across 24 countries and active in wind, solar, energy storage, biomass, hydro, green hydrogen, transmission, and distribution. An industry innovator for over 40 years, RES has delivered more than 24 GW of renewable energy projects across the globe and plans to bring more than 22 GW of new capacity online in the next five years. As a service provider, RES has the skills and experience in asset management, operations and maintenance (O&M), and spare parts – supporting 41GW of renewable assets across 1,300 sites. RES brings to the market a range of purposeful, practical technology-based products and digital solutions designed to maximise investment and deployment of renewable energy. RES is the power behind a clean energy future where everyone has access to affordable zero carbon energy bringing together global experience, passion, and the innovation of its 4,500 people to transform the way energy is generated, stored and supplied.

As a leading U.S. contractor in water, wastewater, and industrial water construction projects, we are committed to delivering maximum value to clients and their communities. MWH history dates to the early 19th century and features some of the world’s most groundbreaking water and wastewater innovations as well as specialization in client-focused collaborative delivery methods. The MWH family includes Slayden Constructors in the Pacific Northwest and Methuen Construction Company in the Northeast.

Frontline Road Safety Group is the largest provider of pavement marking services in the United States through the many best-in-class operating companies we feature in our portfolio. With deep operational leadership, technical expertise, and a premium quality of execution, we provide pavement marking solutions that are unparalleled. Join our team of suppliers and become a part of our dedication to excellence.

Our passion is to develop and install innovative solutions that protect people and infrastructure from the dangers of geohazards. Founded in 2002, GeoStabilization International® has combined the most experienced and responsive geohazard mitigation professionals in North America. GeoStabilization specializes in design/build/warranty landslide repair, rockfall mitigation, excavation shoring, grouting, and GRS-IBS abutment construction. With over 4800 completed geohazard repairs in the last 19 years, our combined experience and nationwide emergency response capability are unmatched. GeoStabilization provides geohazard mitigation services across North America, Canada, and Australasia.

Peak Utility Services Group Operating Companies provide a full-suite of services for the recurring repair, replacement, maintenance, upgrade and installation of telecom, electric power, and natural gas infrastructure in the Pacific Northwest and Intermountain West regions, the Dallas-Fort Worth area, the Boston Metro area, and in parts of Florida. Peak is the parent company of Track Utilities, SiteWise, Kelly Cable of New Mexico, Riley Brothers, and Superior Pipeline Services (SPS); five industry-leading utility service contractors. The Peak companies play a key role in supporting our clients'​ expansion into new frontiers.

Kelley Trucking Inc. is a heavy civil contractor specializing in the construction of dams, airports, highways, development and reclamation of gravel pits, production water storage ponds, overlot grading, aggregate production, demolition, and hauling. We are licensed, insured, and bonded with a single project bonding capacity in excess of $50 million. For 45 years we have worked to structure our company with the sole purpose of providing our clients with excellence in earthmoving.

What is Flatiron? We’re more than a construction company. We are an organization of some 3,500 people with diverse backgrounds and varied expertise who share a singular focus on enhancing the well-being of people and communities. We bring together industry-leading engineers, highly skilled craft workers and other professionals to deliver innovative solutions to infrastructure challenges across the U.S. and Canada. Flatiron builds highways and bridges; aviation, rail and transit; dams and water treatment facilities; and underground projects that fuel local economies, improve safety and enhance efficiency. Flatiron engineers harness the art and science of structural design to create solutions that are as beautiful as they are functional. Our craft employees and on-site leaders bring vital experience to each project to turn vision into reality. And our project leaders collaborate with project owners to deliver solutions that meet challenging criteria—safely—while at the same time mitigating risk for all those involved. Beyond safely delivering outstanding projects, Flatiron people demonstrate a commitment to ongoing learning, sustainability, our clients and partners, and the communities where we live and work. We build careers. We hire and advance the best engineers, craft workers and other professionals in our industry. We transform infrastructure.

Asphalt Specialties Co., Inc. is a Colorado family-owned heavy highway contractor. We have been providing quality products and construction services throughout the Front Range of Colorado for over 30 years. We specialize in asphalt paving, patching, as well as grading and earthwork. We supply a full range of building materials including aggregates, asphalt and recycled aggregate products from our many aggregate locations.

Formed in 1985, ARS Companies have provided construction services to Western US customers for over 30 years. Headquartered in Denver, Colorado ARS Companies operates under the values of Trust, Communication, Loyalty, Vision, and Accountability The ARS Companies is a privately held consortium consisting of six separately managed lines of business. These lines consist of Soil Stabilization, Asphalt Recycling Services, Structural Concrete Services, Railway Trans-loading, Land Development Services, and Sand & Gravel Services. All ARS lines of business maintain a safety program with a zero accident – zero incident goal. Creating a safe work environment for ARS workers and the public is priority one. The ARS Companies belongs to various local and national affiliations, among them, AGC – Associated General Contractors Association, CCA – Colorado Contractors Association, and CAPA – The Colorado Asphalt Producers Association.

CEI Constructors is built by our team’s unmatched dedication and talent, leading Colorado's heavy civil industry since 1986. Our self-performing team offers expert transportation, structures & bridges, site development, earthwork, utilities, stream restoration, fleet, and fabrication services to clients. Our team of Front Range members takes great pride and responsibility in seeing that our clients and community are the direct recipients of superior and sustainable results.

Established in 1996, A-1 Chipseal is a full-service asphalt maintenance and pavement preservation company located in Denver, Colo. Completing numerous projects for various cities, counties and CDOT across the Front Range, A-One Chipseal is designed to provide preventive maintenance construction including resurfacing asphalt streets, roads, parking lots and highways. In January 2009, A-One Chipseal purchased the assets of Rocky Mountain Pavement Maintenance, Inc. A-1 Chipseal provides the highest quality services and innovative products with the highest levels of professionalism, integrity, honesty and experience. We take great pride in our accomplishments and aim to be the leader in asphalt pavement preservation by offering a full range of service capabilities with the highest quality materials.