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4M Building Solutions Acquires Calvary Building Services
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4M Building Solutions Acquires Calvary Building Services
Sep 11, 2025 3:21 AM

ST. LOUIS--(BUSINESS WIRE)--

O2 Investment Partners (www.o2investment.com) is pleased to announce that 4M Building Solutions (“4M”), a leading full-service commercial cleaning and janitorial services platform, has completed the acquisition of Grand Rapids, Michigan based Calvary Building Services (“CBS”). Terms of the investment were not disclosed.

CBS has been serving the greater Grand Rapids, Michigan metro-area since 2017 with a team of 50+ dedicated employees and long-tenured (average 5+ years) client contracts. The Company offers an extensive list of cleaning and specialty services including custodial, day porter, carpet cleaning, stripping and waxing, window cleaning, restorative floor cleaning, and more for clients in the corporate owner-occupied, special services, education, manufacturing/logistics, medical, and multi-tenant end markets.

Tim M. Murch, 4M CEO, said, “Matt Joyce and his teammates created an exceptional business with a diversified customer base and an emphasis on specialty services. 4M will preserve Matt’s legacy, support his employees and provide infrastructure to support and enhance CBS’s growth trajectory. Notably, Matt plans to continue with 4M and we look forward to his continued success.”

Mark Heneman at O2 commented, “The acquisition of CBS accelerates 4M’s expansion in the greater Grand Rapids, Michigan metro-area and throughout the broader state of Michigan, particularly in the Southeast area. The additional density in Michigan will continue to improve the speed and efficiency of services to customers. Both CBS and 4M are culturally aligned around a customer-first service model and we look forward to arming the CBS team with 4M’s best practices and technology-forward operations.”

About Calvary Building Services

Calvary Building Services is a provider of commercial janitorial services in Grand Rapids, Michigan with a long-tenured customer base and variety of end markets. Additional information is available at https://commercialcleaninggr.com/.

About 4M Building Solutions

Founded in 1978, 4M Building Solutions is a full-service cleaning, janitorial, housekeeping, and disinfection services company headquartered in St. Louis, Mo. The company’s operations span 27 Midwest, Northeast, Southeast, and Western states. More than 7,000 Team Members provide daily environmentally friendly cleaning to 220 million square feet of space in corporate owner-occupied facilities, multi-tenant office buildings, and facilities supporting industrial and manufacturing, logistics, distribution, education, healthcare, and senior living. Additional information is available at www.4-m.com.

About O2 Investment Partners

O2 Investment Partners is a Midwestern-based private equity firm that seeks to acquire majority interests in lower middle market niche services, technology, and select industrial companies. The firm invests in businesses with earnings growth potential and a clear path to the creation of shareholder value. O2 invests with a view toward partnering with management to build and grow the business and take it to its next stage of development. This requires not only a clear vision and strategic plan to create shareholder value, but a close partnership and alignment of interest with management. Additional information is available at www.o2investment.com.

Source: O2 Investment Partners

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