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OH
Housed in Geneva-on-the-Lake’s first fire station, Old Firehouse Winery makes Ohio wines and serves them in a Lake Erie setting that feels part winery and part summer destination. The winery’s signature attraction is the restored #5 Big Eli Ferris wheel, built in 1956 and brought back to the grounds after Erieview Park closed. Its Sunset Patio pairs the wine with live music, food and views across the lake.
Started by a few friends with a greenhouse, Old Souls Farms is a vertically integrated food company in St. Paris that grows, processes and packages food under one roof. Its controlled greenhouse and hydroponic operation supports year-round production, including chocolate-covered fruit and flash-frozen strawberries, while in-house engineering keeps the process close to home. With 215 full-time employees, the company is expanding in Champaign County and building a larger local food operation.
Founded by Dale Johnson in 1993, Old World Stone Carving creates hand-carved architectural stonework, sculpture, and other commissioned art from its Ohio studio. Johnson has been taking commissions since 1989, working with clients across the country and personally guiding projects from sketches through carving, delivery, and installation. The studio’s work spans historic reproductions and original designs, with progress photos giving clients a view of each piece as it takes shape.
Oldcastle APG is a North American manufacturer of architectural building products and outdoor living materials, operating a network of more than 200 locations. A CRH company, it brings together brands serving outdoor projects in residential and commercial spaces, with products ranging from hardscape materials to fencing and pool finishes. The company also provides design tools and support for planning outdoor spaces.
Oldcastle BuildingEnvelope is a North American vertically integrated manufacturer, fabricator, and distributor of architectural glass, glazing systems, hardware, and supplies. With more than 80 locations across the United States and Canada, it partners with glaziers, contractors, architects, and building owners, providing integrated building-envelope products and design assistance.
Founded in Cincinnati in 1938, Oliver Chemical Company manufactures industrial and commercial cleaning chemicals, including custom and private-label formulations, for customers across the country. The company began by making cleaning compounds for railroads and car washes and now produces and packages powder and liquid products from a 25,000-square-foot Cincinnati facility. Its long experience also extends into specialized chemistries for manufacturing and other niche applications.
Founded as a machinery company in 1890, Oliver Healthcare Packaging became focused on medical packaging in 1968 and now builds its identity around protecting patients. The company designs and manufactures flexible sterile barrier packaging for healthcare customers, with engineering support available through its international network of technical centers.
Oliver Inc. manufactures printed packaging and marketing materials, including folding cartons, labels, booklets, catalogs, presentation folders, and specialty packaging. Its capabilities include offset lithography, flexography, digital printing, decorative treatments, fulfillment, warehousing, folding and gluing, and packaging assembly for health and beauty, food and beverage, pharmaceutical, cannabis, and consumer goods markets.
With more than 250 years of combined printing and packaging experience, Oliver Inc. produces custom packaging and printed materials through a turnkey process that runs from design and proofing to fulfillment. The company operates six production facilities across the United States, supporting folding cartons, labels and marketing materials with in-house design, multiple print formats and warehousing. Oliver also brings a pronounced sustainability focus, offering responsibly sourced and recycled paperboards alongside certified environmental and color-consistency practices.
Founded in 1986 and acquired by Olon SpA in 2017, Olon USA is a contract research, development, and manufacturing partner focused on small-molecule drugs and other chemical-based industries. Its single 25-acre Concord, Ohio site brings together 160,000 square feet of laboratory and manufacturing space, with services spanning development through scale-up and production. The company reports that 71% of its chemists hold advanced degrees and that its quality system has supported audits by more than 200 clients and the U.S. FDA.
Olsträd Corporation is a Kent, Ohio engineering company known for making industrial automation practical for smaller businesses. It partners with customers on projects that may require design and fabrication, then supports the resulting systems in the field. The company also serves combustion applications through its Combustion 911 operation.
Founded in 1955, family-run Olymco, Inc. provides electroplating and metal-finishing services from its long-standing Canton, Ohio operation. Its roughly 50,000-square-foot facility handles both large and delicate parts, and the company has built a reputation for taking on difficult plating work. Olymco also operates a zero-discharge waste-treatment system designed to process more than 100,000 gallons of water per day.
Founded in 1981, Cleveland-based Olympic Forest Products supplies pallets and industrial packaging for customers across North America. What began as a local brokerage has grown into a family-owned operation with five manufacturing plants, supported by partner producers, recyclers and specialty suppliers. The company pairs custom pallet and packaging programs with supply-chain, inventory and logistics support, while emphasizing sustainable sourcing and recycled-pallet options.
Olympus Aerospace is a second-generation Willoughby company, tracing its roots to the Apollo Products tool shop founded by Jesse Baden and Michael Scanlon in 1994. Katy Baden and Chris Scanlon took ownership from their fathers in 2022 and united the former operating companies under the Olympus name in 2024. The company is known for supporting aerospace and industrial gas turbine manufacturers with specialized tooling and wax patterns.
Omar Associates is an Ohio manufacturer with blue-collar roots that has served the industrial food-processing industry since 2001. Its experienced engineers and master craftsmen create custom machinery for major food producers, with support extending to repairs and process improvement for operations across the United States and around the world.
OMCO Fabrication carries the legacy of Weaver & Sons, a Talladega operation founded in 1945 by members of the Weaver family after one son returned from World War II. Acquired by OMCO in 2014, the 100,000-square-foot facility now produces custom metal components and complete assemblies for OEMs and other industrial customers, backed by ISO 9001:2015 certification.
Rooted in Aalter, Belgium, OMCO International has grown from a local mould shop into a global glass-industry manufacturer with six production sites and two foundries. As part of the family-owned BMT Group, it is known for making the precision moulds that glassmakers use to produce bottles and jars, with repair support that helps extend their working life.
Established in 1994, OMEC Smart Card manufactures smart cards, RFID products and custom credentials from its U.S. production base in Strongsville, Ohio. Its integrated operation carries programs from printing and assembly through programming, personalization, inspection and packaging, with annual capacity of 60 million cards and support for customers in more than 20 countries. OMEC’s production is ISO 9001:2025 and Mastercard CQM certified.
Founded in 1981 around large injection molds, Omega Tool Corp. engineers and manufactures precision plastic injection molds and supports them through machining, validation and production molding. From its Ontario base, the company operates three Ontario facilities and one in Mexico, employing several hundred team members and serving mobility, appliance and construction customers. Omega was named a new winner of Canada’s Best Managed Companies in 2024.
Since 1977, Ometek Incorporated has helped OEMs turn designs into finished metal parts and products from its 100,000-square-foot Columbus, Ohio, plant. Its unusual breadth of in-house work spans precision fabrication and machining through copper components, electromechanical integration, and testing, giving customers a single manufacturing partner from engineering through final build. Ometek is ISO 9001 certified and its welders are certified to AWS D1.1.