4M Expands with Two Midwest Acquisitions

ST. LOUIS -- The acquisition by 4M Building Solutions of Bluegrass Commercial Cleaning, Mayfield, KY, and Elgin, IL based Rainbow Maintenance Services have been completed, according to 4M parent company O2 Investment Partners.

Terms of the investment were not disclosed, but 2026 has been a transformational year for 4M, which continues to improve its service quality and expand its commercial reach across the country.

Husband and wife team Jared and Christy Baker purchased Bluegrass in 2015, and since then, the Bakers have grown the business into a trusted commercial cleaning leader across Kentucky. The Company specializes in janitorial services, strip/wax floors, and deep/disinfecting cleaning for clients in a variety of end markets, including distribution, medical, banking, corporate owner occupied, government, and education.

Rainbow has been servicing the greater Chicago metro area since 1985. It is a customer driven organization operating on a simple belief that quality workmanship and open communication are the keys to customer satisfaction. Rainbow brings with it long-tenured customers within an attractive and diverse set of end markets including distribution, corporate owner occupied, medical, and education.

Bluegrass and Rainbow mark 4M’s 15th and 16th acquisitions since partnering with O2 Investment Partners in January 2023.

“Both companies share a commitment to quality, customer service, and community values, which aligns well with 4M's mission,” said Leonard Carder, 4M CEO. “We are honored to welcome their clients and Team Members into the 4M family as we continue our growth across the country.

“By bringing the full breadth of 4M’s resources to Bluegrass and Rainbow, we are excited to bring their customers greater operational support and service capacity. We look forward to building upon the strong foundation of both teams.”

Mark Heneman at O2 said, “The two partnerships reflect ongoing momentum, and we are excited to deepen our presence in both Kentucky and Illinois. We are thrilled to welcome Bluegrass, Rainbow, and their respective team members to the 4M platform.”

Bluegrass Commercial Services is a provider of commercial janitorial services in Kentucky with a long-tenured customer base and a variety of end markets. Additional information is available at www.bluegrass-cleaning.com.

Rainbow Maintenance Services is a provider of commercial janitorial services in the greater Chicago area with a long-tenured customer base and a variety of end markets. Additional information is available at www.rainbowms.com.

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 of 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 or www.o2investment.com.