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PA
Founded by Jimmy Rane in 1970, Great Southern Wood Preserving began with a small Alabama treatment plant and grew into a wood-products company operating 16 treatment facilities. It is best known for the YellaWood brand of pressure-treated pine and also makes fire-retardant-treated wood and custom industrial packaging. Its business has expanded to include sawmilling, custom packaging manufacturing, material import and export, building-product distribution, and logistics.
Great Valley Products - M Inc. makes expansion hardware and software for Commodore Amiga computers, from accelerator and SCSI cards to graphics, video and sound equipment. Its products are unusually focused on extending older Amiga systems for demanding multimedia work, including the EGS-28/24 Spectrum graphics board, TBCPlus video-processing card and DSS8+ sound sampler. The company also maintains drivers, installation disks and replacement parts for its Amiga product line.
Founded in 2012, Great Valley Vineyards is a developing vineyard and winery that grows its own vine stock and produces small-batch wine. Its early history centers on propagation and patience, from a first grape harvest in September 2013 to vintages including Catawba Red and a blend of Cabernet Sauvignon and Catawba.
Serving Western Pennsylvania since 1941, Greco Gas is a regional supplier known for pairing local welding-industry service with in-house gas production. Its Tarentum headquarters supplies manufacturers, fabricators, and welders through a packaged-gas filling plant and specialty gas laboratory, with additional branches in Butler and Kittanning.
Now in its fourth Greco generation, Greco Steel Products fabricates, details, and erects structural steel for commercial and industrial construction. The Springdale company grew from a family business founded in 1911 and was established as Greco Steel Products in 1961 by Jim Greco Sr. Its in-house team and facility carry projects from design and 3D modeling through fabrication, crane and trucking service, and erection.
Since 1920, Grede has made highly engineered ductile, gray, and specialty iron castings for safety-critical applications in vehicles and industrial equipment. The historic American foundry now operates seven facilities with 3,000 team members, handling projects from technical design through machining and assembly. Grede also brings an established energy-conservation program to its foundry operations, including recognition as an ENERGY STAR Partner of the Year in 2024.
Founded by the Swartzentruber family in 1988 as a small wooden-lawn-furniture business, Green Acres Outdoor Living now supplies the Lehigh Valley with patio furniture and backyard structures. The family-run company has grown from a seasonal roadside operation into a regional outdoor-living retailer with locations in Allentown and Easton, offering custom-made products and delivery, setup, and site-preparation services. Most of its product lines are made by Amish craftsmen in Pennsylvania and Ohio, a detail that reflects the company’s emphasis on workmanship and value.
Since 2018, Green Chem Laboratories has built its identity as a WBENC-certified Woman-Owned Small Business with a practical environmental focus. The Philadelphia-based manufacturer develops USA-made commercial cleaning and industrial maintenance products for facility teams, institutional buyers, and government customers, emphasizing multifunctional formulas that can simplify routine work.
Founded in 2001 by racer and parts manufacturer Mark German, Green Filter USA brings motorsports experience to its work in Pennsylvania. The company makes reusable performance air filters for drivers, racers, and engine builders, with its filters produced by hand from U.S.-manufactured materials.
Founded by engineers in 2006, Green Gorilla manufactures battery-powered automated sprayer systems that maintain tank pressure without manual pumping. Built and tested at its factory just outside Pittsburgh, the company uses patented Smart Pressure Technology to deliver steady applications for professional pest control, disinfection, detailing, and industrial work. Green Gorilla also develops systems around specific industry needs rather than treating every job as a one-size-fits-all application.
Green Mill Supercritical manufactures supercritical CO2 fluid extraction systems, drawing on a history of Pittsburgh, PA-based supercritical carbon dioxide technology dating back to Carnegie Mellon University in the early 80s. Their systems incorporate scientific advancements and are customized for the needs of a rapidly evolving industry.
Founded in 2015, Green Revolution makes cannabis edibles, beverages, tinctures and topicals from its Kitsap County, Washington operation. Its signature UNET ultrasonic nano-emulsification technology turns cannabis oil into water-soluble molecules for fast-acting, consistent products, including the Doozies gummy line and WildSide drinks. The company says every product is independently checked through production and manufactured in a Clean Green Certified facility, with batch-specific lab reports available to customers.
Greenawalt Furniture is a West Newton, Pennsylvania showroom specializing in fine-quality solid-wood home furnishings, with American-made furniture at the center of its offering. Serving Western Pennsylvania and surrounding areas, it showcases bedroom collections in styles ranging from Mission and Shaker to country and traditional, along with living and dining furnishings. The showroom also features distinctive details such as 200-year-old chestnut beams and furniture available in a wide range of wood species, finishes, and upholstery options.
Greencore Group plc is a convenience-food manufacturer founded in 1926 as Irish Sugar. It supplies chilled, frozen and ambient foods to retail and foodservice customers in the UK, and its enlarged business supplies products across eating occasions. Its head office is in Dublin, Ireland, with manufacturing sites and distribution depots across the UK and a presence in the US.
Based in Pennsylvania, privately held Greene Street Pharmaceuticals develops and manufactures transdermal medicines, taking products from formulation through clinical studies and commercialization in-house. Its distinctive model combines a portfolio of Transdermal Innovative Products with small-scale direct manufacturing capacity of more than 3 million patches annually, focused on the 505(b)(2) pathway and on delivery options for patients with swallowing difficulties. The company operates an FDA-registered facility capable of production under cGMP standards.
Greene Team Pellet Fuel Company, LLC produces wood pellet fuel at its facility in Greene County, Pennsylvania, where it converted the former Robena Mine site from fossil-fuel mining to renewable biofuel production. Founded to produce clean, renewable energy and reduce dependence on fossil fuels, the company makes its pellets from sawdust sourced as a by-product of regional lumber facilities.
Greene Tweed is a 160-year-old engineering and manufacturing company known for helping critical equipment keep operating in the world’s harshest environments. From its Pennsylvania headquarters, more than 200 engineers working across 15 locations develop customized components and materials for customers whose applications face extreme heat, pressure, chemicals, or wear. Its global manufacturing network includes ISO 9001:2015-certified facilities.
Founded in 1997, GreeneTech Manufacturing is a Washington, Pennsylvania manufacturer that fabricates, machines, and assembles products for industrial customers. After beginning in Waynesburg, the company moved to its current Washington location in 2005 and describes a team with more than 1,500 years of combined experience.
Greenfiber manufactures cellulose insulation for homes and agricultural structures. The company says it operates 12 manufacturing plants across the United States and Canada and serves homeowners, contractors, and builders; its listed plant communities range from Tampa, Florida, to Debert, Nova Scotia.
Founded in 1998, Greenfield Manufacturing Incorporated has grown from a specialty paper-chemicals operation in Corinth, New York, into a Saratoga Springs contract manufacturer. Its 30,000-square-foot facility supports customers that need chemical production closer to their markets, while an on-site laboratory helps move projects from development into production. GMI is ISO 9001:2015 certified.