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Founded in 1968 by two railroaders, Ronsco has grown from a Canadian rail-parts distributor into a comprehensive railway provider that manufactures freight-car axles, operates a major wheel shop and repairs railcars and locomotives. Its 46-acre repair facility includes a 65,000-square-foot center with eight tracks under one roof, while mobile teams extend service across Canada. Ronsco also supports the industry through North American warehouses carrying more than 7,000 railway components, tools and supplies.
Rooftop Green manufactures a modular green roof tray system designed for DIY green roofing. The system is presented as an affordable and accessible option that can extend the life of an existing roof and reduce heating and cooling bills.
Root Candles, operated by The A.I. Root Company, is a Medina, Ohio candle manufacturer founded in 1869 and still led by the fifth generation of the Root family. Building on a history in beekeeping and beeswax candle-making, the company produces approximately 20 million candles a year, including liturgical candles, using handcrafted methods alongside modern manufacturing technology.
Rooted Grounds Coffee Company was founded by Patsy and David, whose passion for artisan coffee led them to build a community-minded roaster for settings beyond the coffee shop. The Ohio-based company makes fresh, small-batch craft coffee for commercial customers, with proceeds from its Readers Roast supporting the Second & Seven Foundation. Rooted Grounds is also certified as a Women’s Business Enterprise by WBENC.
Since 1975, Roper Lock Box has manufactured lock boxes and safety products from Hudson, Ohio, starting with a single combination box for real estate agents and growing into a supplier for emergency services and property-preservation work. Its distinctive Critical Entry Municipality Program now serves more than 100 emergency service departments across over 15 states, helping responders enter participating homes without forced entry. Roper’s Small Four Number Lock Box has sold more than 630,000 units, while its Guardian platform lets customers change combination lids without replacing the vault.
Headquartered in Fostoria, Ohio, Roppe Holding Company is a multi-business organization whose subsidiaries serve markets across the country. With operations in Ohio, Alabama and Florida and more than 750 employees nationwide, it uses shared resources and unified brands to support its companies, employees and customers.
Rose Layman Laminating & Mounting grew from Virgil Rose’s 1983 garage operation into a Cincinnati-based company that protects and prepares printed materials through laminating, mounting, and finishing. With more than 40 years in business and over 60 years of combined team experience, it serves print projects from small business cards to pieces up to 60 inches wide. The company is known for prompt quoting, advance-scheduled two-day turnaround on runs of 10,000 sheets or fewer, and close attention to quality and shipping preparation.
Rose’s Upholstery is Rose Brennan’s rural Northfield-area reupholstery studio, where furniture is renewed through hands-on repair, fabric selection, and custom upholstery. Brennan earned her upholstery degree in 1985 and later taught the trade at South Central Technical College, with an internship preserving historic furniture at Saint Paul’s Alexander Ramsey House. Opened from her home in 2005, the business brings that teaching and conservation experience to antique furniture, household pieces, and other upholstery projects.
Founded in 1974 as a tool and die shop by Lary and Viv Rosenboom, Rosenboom now custom-engineers and manufactures hydraulic cylinders for demanding equipment applications. Its engineering team works with OEMs from concept through rollout, while every cylinder is oil tested and supported by robotic welding and in-house inspection. With facilities in Iowa and Ohio, the company also builds complete cylinder assemblies when customers need more than the cylinder itself.
Marked by a 50-year anniversary and based in Rosewood, Ohio, Rosewood Machine and Tool Company provides machining for small and production quantities, along with tooling and special equipment. Its engineering team designs customer-specific machines and fixtures, while robotic automation supports production work; the company also maintains an unusual sideline in parts for antique tractors and classic vehicles. Rosewood Machine is ISO 9001:2015 certified.
Since 1931, Ross Aluminum has operated in Sidney as a custom aluminum casting foundry, producing castings for aerospace, automotive, defense and small-engine applications. The company combines dry-sand, green-sand and permanent-mold work with in-house inspection and finishing capabilities, and its aerospace work is supported by AS9100 Rev D, ISO 9001:2015 and NADCAP approvals for special processes. Ross became part of minority business holding company P&THE Manufacturing in 2022, which kept the foundry operating under new ownership and management.
Ross Metal Works is a Houston family-owned metal fabrication shop that has hand-forged custom architectural and ornamental work since 1910. President and owner Barry Ross still uses tools passed down from his great-grandfather’s Marlin, Texas shop, while the company pursues unusual design solutions such as its patented keyless SPEED Latch and trackless gates. Its shop artisans work with homeowners, builders, and businesses to turn individual designs into finished metalwork.
Rotary Forms Press is a Hillsboro, Ohio manufacturer of business forms and checks, and part of the Rotary Forms family of companies. Its stated offerings include custom continuous forms, laser-compatible cut sheets, and jumbo rolls for a range of industries.
Rotex Group is a Cincinnati-based industrial manufacturer whose screening heritage dates to 1844. Known for developing separation equipment for process industries, it serves customers worldwide and backs its machines with materials testing and technical support. Its work spans demanding applications such as grain handling, minerals processing, and recycling.
Rothenbühler Cheesemakers makes Swiss-style cheeses rooted in the Old-World flavors of Switzerland’s Emmental Valley, including its award-winning Founder 56 Emmentaler. Based in Middlefield, Ohio, the company also collects whey from its cheesemaking process for ingredient applications and operates a farm and cheese chalet. Its Founder 56 earned the 2023 gold medal for Best Swiss in America.
Rothenbühler Cheesemakers draws on Swiss cheesemaking traditions rooted in the Emmental Valley to make award-winning Swiss cheeses in Middlefield, Ohio. Its Founder 56 Emmentaler won the 2023 gold medal for Best Swiss in America, while the company also collects whey from its cheesemaking process for use in nutrition products. The operation includes a farm and a cheese chalet serving as a destination for local shoppers and visitors.
Founded in 2004, Roto Group LLC designs and builds interactive exhibits and immersive environments for museums, science centers, children’s museums, zoos and cultural attractions. Its 85-plus professionals combine experience design with in-house engineering, prototyping and fabrication, taking projects from early concepts through installation. Roto’s work includes Discovery World on Market in Parkersburg, where locally inspired exhibits fill a 13,000-square-foot children’s museum.
Roto Tech is a Dayton, Ohio manufacturer carrying forward a precision rotary-table tradition that began with Roto Technology in 1958. Since acquiring that product line’s assets in 2002, the company has continued building Roto-Grind tables in the United States for manufacturers working to tight surface-finishing requirements, while also supporting existing equipment through repair and rebuild work.
Founded in 1956, Rotocast Technologies manufactures rotational molds and specialty aluminum castings, drawing on a long-standing focus on tooling for the rotational molding market. The company describes an in-house foundry and a workforce averaging 16 years of experience in specialty casting and mold manufacturing, and it also serves customers in urethane and vacuum forming.
For more than 20 years, Rotoline has built its identity around the global rotomolding industry, with a Brazilian operation, a U.S. branch, and sales representation in Europe. The company manufactures rotomolding machinery for plastic processors and supports installations on all five continents through multilingual technical assistance.