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21 deals tracked · Updated 11:05 AM PDT·Full deal sheet
Add-on·Business Services/Commercial Facility Services·July 21, 2026

O2-backed 4M adds Bluegrass and Rainbow

The commercial-cleaning platform completed acquisitions in Kentucky and Illinois, its 15th and 16th deals since O2 invested in 2023.

Takeaways

  • 4M completed its 15th and 16th acquisitions since O2 invested in January 2023.
  • The acquired companies serve commercial customers in Kentucky and the greater Chicago market.
Buyer4M Building Solutions
TargetBluegrass Commercial Cleaning and Rainbow Maintenance Services
SponsorO2 Investment Partners
TypeAdd-on
GeographyKentucky and Illinois
IndustryBusiness Services
Sub-sectorCommercial Facility Services

O2 Investment Partners-backed 4M Building Solutions completed the acquisitions of Bluegrass Commercial Cleaning and Rainbow Maintenance Services.

Bluegrass provides commercial janitorial, floor-care and deep-cleaning services across Kentucky, while Rainbow serves customers in the greater Chicago market.

The acquisitions extend 4M's commercial-cleaning and facility-services platform into Western Kentucky, northwestern Tennessee, southern Illinois and the Chicago area.

They are 4M's 15th and 16th acquisitions since O2 invested in January 2023.

Terms were not disclosed.