Founded in 1997 by David Rollen and headquartered in Coppell, Texas, Rock Materials is a wholesale distributor of natural and architectural cut stone, manufactured stone, cast stone and masonry supplies. Rock Materials also operates at a second location in Tomball, Texas, a suburb of Houston. Rock Materials is the largest provider of architectural stone within the state of Texas and the transaction marks a substantial expansion in this line of business for SRS.  The Company’s senior management team will continue in their functions, leading this effort while retaining upside opportunity as shareholders in SRS post-closing.

Founded in 2009 and based in Reno, Nevada, NDSS is the largest installer of drywall, stucco and stone materials for contractors serving the multifamily residential, commercial and housing markets in western Nevada and eastern California. The principals of NDSS will retain equity positions in the business and will continue in their leadership roles.

Based in Odessa, Texas, and established in 2003, eTech is a leading environmental remediation business providing regulatory mandated environmental consulting, soil sampling & testing, remediation, waste management, and long-term compliance services to a large base of blue-chip customers in the upstream, midstream, government, and industrial end markets throughout the Permian Basin. With over 125 skilled environmental technicians and professionals in the field, a top-tier safety record, and a robust portfolio of Master Service Agreements, the Company’s services allow them to work in a diverse array of environmental disciplines, including soil and groundwater testing, remediation, asbestos, mold and lead consulting, federal and state permitting assistance, and a broad range of compliance support. The partnership with KLH will enable the Company to accelerate its growth and continue to expand its service offerings throughout the United States.

Headquartered in Houston, Texas and founded over 35 years ago, ZymeFlow is the worldwide leader in decontamination of hydrocarbon process equipment for entry, inspection, maintenance and effluent management. The proprietary ZymeFlow process prepares equipment for entry by simultaneously de-oiling while eliminating pyrophoric iron sulfide, hydrogen sulfide, benzene and other explosive gases. ZymeFlow products and services are currently utilized in refining, petrochemical, and LNG facilities for both onshore and offshore customers in more than 55 countries. ZymeFlow’s ecofriendly and patented products and services are highly efficient in the decontamination and maintenance of energy and chemical processing facilities in the United States and around the world.

Headquartered in Clackamas, Oregon, PNW operates a full-service ferrous and non-ferrous metal recycling business. The Company sells its recycled metal product to both international and domestic markets. PNW gathers scrap in North America and sells hundreds of thousands of tons of recycled metals to hundreds of domestic and international customers per year. PNW’s services are key to a growing circular economy, offering a low-cost replacement to virgin metal production. Recycled steel scrap saves approximately 70% of energy (95% for aluminum) and 55% of CO2 emissions when compared to virgin materials, according to the World Steel Association.

Through its subsidiaries, Matrix is a leading North American industrial engineering, construction, and maintenance contractor headquartered in Tulsa, Oklahoma with offices located throughout the United States and Canada, as well as Sydney, Australia and Seoul, South Korea. The Company provides services in three key operating segments: utility and power infrastructure, process and industrial facilities, and storage and terminal solutions.