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Family-owned since its Philadelphia founding in 1901, Day & Zimmermann grew from Charles Day’s early industrial betterment work into a company serving complex corporate and government needs. Today, its 32,000-plus employees work across more than 900 locations, with the company particularly known for defense manufacturing and large-scale technical projects. Its guiding promise remains simple: “We do what we say.”
Based in Marietta, Ohio, Day Arc Environmental Systems designs and delivers turnkey indoor cultivation environments that pair geothermal cooling, water-cooled components, and precise digital controls. The company launched its public offering in April 2024 after nearly a decade of carbon-neutral design work, and its system is intended to cut energy use by up to 70% compared with standard grow designs. Day Arc was named a 2024 CannaTech Innovation Award winner and operates a manufacturing and R&D facility in Marietta.
Founded in Cleveland by William Day in 1919, Day Piston Company manufactures pistons for the automotive and air-compressor markets from its Cleveland, Ohio factory. The company remained in the Day family through three generations before transitioning to private ownership in 2022, while a fourth-generation family member, Clyde “Skip” Jones, contributed more than 40 years to operations. Day Piston serves both OEM and aftermarket customers and is IATF 16949:2016 certified.
Established in 1985, Day-Tec Tool & Manufacturing builds custom tooling and special machinery while also providing precision machining and grinding from its 11,000-square-foot facility. The company can design and build fixtures, gages and machine retrofits, or work from a customer’s drawings to produce parts and tooling to print.
DayGlo Color Corp manufactures daylight fluorescent pigments and related color materials, and traces its origins to its 1946 incorporation. It describes itself as the original manufacturer of daylight fluorescent pigments, with a history spanning more than 80 years and research and development teams in the United States and Europe.
From its Cleveland-area headquarters, Daylight Medical distributes the Diversey MoonBeam3 portable UV-C disinfection system for healthcare, emergency-response and patient-transport settings. The company brings more than 16 years in the healthcare industry to a 100,000-plus-square-foot operation shared with affiliate Codonics, which manufactures MoonBeam3 in Middleburg Heights, Ohio. Daylight Medical holds exclusive MoonBeam3 distribution rights for municipal EMS, fire and patient transport in North America, as well as in China and Japan.
Dayton Armor began in 2010 as a small research and development company focused on lightweight protection for the U.S. Department of Defense. After years of research, the Dayton, Ohio company began producing armor for Special Operations Forces and later made that technology available to first responders and civilians.
For more than three decades, Dayton Audio has been known in the loudspeaker community for practical, carefully engineered audio design. Based in Springboro, Ohio, the company develops its products primarily in the United States and works with OEM/ODM partners to create tailored audio platforms for manufacturers and audio enthusiasts.
Dayton Bag & Burlap manufactures and supplies burlap products, wire baskets, nursery supplies, sandbags, polypropylene bags, and related industrial products. Its automotive division manufactures honeycomb composite panels for automotive and marine applications, and the company serves nursery, landscape, industrial, construction, military, automotive, and marine markets.
For more than 35 years, Dayton’s Certified Tool & Grinding has been known for specialty cutting-tool design and OEM refurbishment, while its sister operation, Dayton Coating Technologies, has provided PVD coating solutions for over three decades. Together, the Dayton, Ohio companies bring those capabilities under one roof for manufacturers needing precise, repeatable tooling support and fast project turnaround. Their quality system is ISO 9001 and AS9100 certified.
Dayton Corrugated Packaging Corporation manufactures stock and custom corrugated packaging, with production spanning shipping cartons and retail displays. Based in large-volume production, the company emphasizes quick service and packaging designed to provide product protection for shipping, storage, and sale.
Family-owned and operated since 1946, Dayton Gear manufactures open gearing and drive components while repairing and rebuilding industrial gearboxes. The Dayton company is especially geared toward urgent plant needs, with reverse-engineering support when drawings are unavailable and made-to-order replacement gears available on schedules as short as 24 hours. Its work has included redesigning pulp-and-paper gear sets and producing a bottling-line replacement in under eight hours.
Since the late 1800s, Dayton Manufacturing Company has produced precision metal fabrications from two 50,000-square-foot facilities in Dayton, Ohio. Its concept-to-completion operation serves government, railroad and commercial-contractor customers, with a particularly distinctive line of railroad hardware alongside its broader custom fabrication work. The company’s quality system is modeled after ISO 9002 guidelines, and it handles both small runs and high-production work.
For more than 60 years, Dayton Nut & Bolt has supplied Midwest OEMs with standard fasteners and engineered, made-to-print components, backed by inventory programs that keep production supplied. The locally women-owned company, a division of Forte Fasteners, also manages custom sourcing, kitting and packaging from its distribution facilities. Dayton maintains ISO 9001:2015 certification and inventories 3,000 standard parts.
Dayton Photonics, a Dayton technology startup, develops free-space optical communication systems that deliver broadband without physical fiber. Its Theia™ link uses beam-steering laser technology to provide 10 Gbps connectivity in places where conventional fiber is costly or impractical, including rural areas and other hard-to-reach environments. Founded by optical-communications specialists Emily Fehrman Cory, Ph.D., and Cullen Bradley, the company is bringing fiberless networks from its Ohio base to market.
Family-owned and operated in Dayton, Dayton Precision Aerospace machines high-precision production components and assemblies for demanding aerospace, biomedical, defense, and industrial applications. With more than 50 years of experience, the company handles complex multi-axis work and tolerances as tight as 0.000050 inch, including approved flight-control manufacturing under GE S-1000 requirements. Its quality system is certified to AS9100D and ISO 9001:2015.
Dayton Rogers Manufacturing Co. is a U.S.-based manufacturer of custom metal stampings, sheet-metal fabrications, welded parts, machined components, and complete assemblies from prototype through production. It serves aerospace and defense, medical, energy and infrastructure, industrial, transportation, agriculture, automotive, electronics, and other markets, working with steels, stainless steel, aluminum, copper, brass, titanium, and other alloys.
For more than 30 years, Dayton Seals and Packing has been a Dayton-based manufacturer and distributor serving OEMs with hydraulic and pneumatic sealing components. Its work spans custom-engineered solutions and dependable aftermarket parts, with support extending from design through development.