Business servicesAngeles Equity-backed O'Hara's Son Roofing acquires Starkweather RoofingHeadquartered in Chicago, OSR is a commercial roofing firm.ByIris Dorbian20 May 2025•1 min readJavaScript is required to read this article. Please enable it in your browser and reload the page.DealsNorth AmericaUSBusiness servicesBriefs