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PA
Founded in 1997 by people with hands-on experience across the drilling trade, OCI, LLC has grown from a new venture into a Brookville, Pennsylvania company serving construction drilling projects. It supports customers with custom drilling equipment and related services, including precision machining for demanding components. Its work also reaches environmental, mining, oil and gas, water and utility projects.
OCM, Inc. manufactures and distributes concrete construction supplies as a U.S. subsidiary of Japan-based OKABE Co., Ltd., founded in 1917. Founded in 2002, OCM grew from a focus on construction forming products into a nationwide supplier, with manufacturing facilities and stocking locations supporting customers across North America. Its American manufacturing includes concrete construction products made at its King of Prussia, Pennsylvania facility.
Founded by sculptor Andrew Jevremovic, Octo Studio is a Point Breeze, South Philadelphia workshop known for turning local hardwoods into one-of-a-kind sculptural furniture. Its commission work serves architectural interiors, particularly hospitality spaces, and the studio has grown from a wood workshop established in 2010 into a practice that also undertakes ambitious building projects.
Ocugen is a biotechnology company developing investigational gene therapies, biologics, and vaccines, with a primary focus on retinal diseases and blindness. Founded in 2013 by Shankar Musunuri and Uday Kompella, the company’s pipeline includes modifier gene therapy candidates for retinitis pigmentosa, Stargardt disease, and geographic atrophy, alongside a biologic candidate and inhaled vaccine programs.
Founded in 2018 through a collaboration between EPFL and ETH Zürich, Odne develops endodontic technology designed to preserve natural tooth structure during root-canal treatment. Its OdneClean device uses hydro-dynamic cavitation with sterile water to clean complex canal anatomy, while OdneFill and OdneCure support a light-cured obturation workflow. The company received FDA clearance for OdneFill and OdneCure in 2023 and OdneClean in 2024.
More than a decade ago, F. Rusty Elsner founded ODT Global, LLC after a career spanning over 35 years in manufacturing and machine design. From Hanover, Pennsylvania, his company helps manufacturers improve production efficiency by integrating tailored automation solutions, with engineering and field-service support for projects worldwide.
Since 1976, Off The Wall Company has designed, engineered and fabricated custom store fixtures, displays and decor for retailers across North America. Based in Telford, Pennsylvania, the company serves as a single source from concept through installation, with more than 2 million square feet of manufacturing and warehouse capacity supporting large retail rollouts. Its work includes nationwide programs for brands such as Joann and Luxottica, including custom millwork and signage delivered to more than 200 Target Optical stores.
Since 1954, Ogontz Corporation has manufactured self-contained temperature-control valves and steam traps from its Willow Grove, Pennsylvania operation. Its thermal-actuator designs automatically respond to changing fluid or ambient temperatures, supporting applications such as freeze protection and steam tracing without a pilot valve. Ogontz serves customers through representatives across the United States and internationally.
Founded in 1970 with one man, a welding machine and some grating inventory, Ohio Gratings, Inc. manufactures and custom-fabricates metal bar grating and flooring for industrial, commercial and architectural projects. The Canton company has grown into a multisite operation with more than 475 associates and describes itself as America’s only privately owned full-line grating manufacturer. Its engineered traction products include Wheels n’ Heels®, which combines pedestrian comfort with vehicular loading capability, and ALGRIP® and OnGrip® slip-resistant surfaces.
Established in 1981, Ohio Valley Industrial Services serves industrial, research, and power-generation customers with specialized equipment and components. The company is particularly represented by its Parker instrumentation offerings and its custom HotCaps™ removable insulation covers.
Founded in 1981, Ohiopyle Prints, Inc. grew from founders Fred Wright and Scott Bortree’s idea to print rafting-themed T-shirts into a wholesale souvenir and apparel producer. Now operating from a 45,000-square-foot warehouse in Ohiopyle, Pennsylvania, the company develops graphics and produces goods for retailers, schools, resorts, and local-town programs. Its history includes the My Town Originals brand and a school spirit wear program that has raised more than $13 million in school donations.
Pittsburgh-based Ohm-Labs is the only U.S. company focused exclusively on resistance, manufacturing metrology-grade standards, precision current shunts and high-voltage dividers. Founded by Jay Klevens in 1985 and spun off as Ohm-Labs in 2006, the company also carries forward legacy Leeds & Northrup, Julie Research Labs and EIS designs and support. Its products are made in the USA and supplied with A2LA-accredited ISO/IEC 17025 calibration, which Ohm-Labs also provides for equipment from other manufacturers.
OHSUNG CO., LTD. traces its roots to the founding of Ohsungsa in Busan in 1965 and has since developed into a Korean manufacturing group. The company says it grows with its clients through technology and product quality, with affiliated businesses extending its work into motors and household equipment.
From Titusville, Pennsylvania, Oil Creek Plastics makes small-diameter polyethylene pipe for water, gas, geothermal and heating applications. Founded in 1958, the family-owned manufacturer is led by siblings Stacy Warner and CJ Kirvan and has grown into one of Titusville’s largest employers. Its American-made pipe is tested with gravimetric and ultrasonic systems, with selected lines carrying NSF listings and marks.
Founded in October 2021 by Snezhana Bogatin after she tested more than 200 essential and carrier oils in her home lab, Oil Divine makes plant-based natural skincare and wellness oils. The female-founded, female-owned company formulates and manufactures its line in Pennsylvania, drawing on herbal medicine and Ayurveda while sourcing botanicals from more than 60 countries. Its Newtown retail store has grown into a broader wellness destination featuring Oil Divine products alongside carefully screened clean-living goods.
For more than 70 years, OKW Enclosures, Inc. has supplied electronic enclosures and tuning knobs, with its Bridgeville operation serving as the North American subsidiary of Germany’s OKW Gehäusesysteme GmbH. The company’s distinctive offering is a ready-to-use enclosure service: its standard products can be machined, marked, finished and assembled to customer specifications before electronics are installed. OKW supports designs ranging from medical equipment to industrial and building-automation electronics, and maintains ISO 9001:2015 quality certification.
Old Auto Llc is a classic car rebuilding expert specializing in remanufacturing brake proportioning valves, calipers, and starters for vintage American vehicles. The company provides restoration services to bring classic car parts back to life with high-quality care and reliability.
In Intercourse, Pennsylvania, Old Road Furniture Company makes custom furniture and kitchens one piece at a time in its own workshop. Its artisans work with customers from design through installation, using hardwoods and traditional joinery such as mortise-and-tenon construction and dovetails. The shop also takes on unusual custom carpentry, from spiral staircases to church altars, and has completed furniture and kitchen projects across the United States and internationally.
Old School Snacks, Inc. makes Golden Flavor all-natural snack sticks in a renovated 1927 schoolhouse in Cairnbrook, Pennsylvania. Founded by Tom and Fran Chiappelli in 1994, the family-owned company produces 14 varieties with non-GMO ingredients and sends them fresh from the factory rather than warehousing finished snacks. Its peanut-free facility produces approximately 1,000 pounds of snack sticks per hour for distribution across the United States and Canada.
Old State Farms makes pure maple syrup and maple specialties from wild-grown hard maple trees in the Appalachian mountains of northwest Pennsylvania. What began in 2001 with a couple tapping 20 trees on the husband’s parents’ farm has grown into a family operation with 3,500 taps, producing about 1,500 gallons of syrup each spring. The farm uses sustainable harvesting practices, including woodland tubing that reduces damage to forest soils, and its maple syrup reaches customers across the country.