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MD
Family-owned and operated since 1908, Gray & Son is a Maryland site-development and paving contractor that also produces asphalt from regional plants. The company’s roots run from the Gray family’s Butler Mill and stone quarry to a multigenerational Baltimore-area construction business, with third-generation executive vice president Katie McInnes helping carry that history forward. Its work includes major public, commercial, and residential projects, including the Under Armour Product & Innovation Center in Port Covington.
Great Frogs Winery is an Annapolis vineyard and winery where owners and winemakers Nathanael and Andrea O’Shea oversee the work from hand-pruned vines through handcrafted, award-winning wines. Night harvesting and careful vineyard management help the wines express the Chesapeake Bay region’s terroir, while the working farm’s tasting room, patio, and tobacco barn give guests a place to enjoy them with local music and wine-friendly snacks.
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.
Founded in 1966 by World War II Navy Seabee Raymond Dubinsky, Greater Maryland Tool & Manufacturing Corp. remains a family-run Maryland manufacturer under the leadership of his son Mark and grandson Steve. The company is known for supplying precision-machined parts to the U.S. Navy Nuclear Propulsion Program since the 1970s, along with work for defense contractors and government agencies.
Since 1933, Green Bay Packaging has remained a third-generation, family-owned manufacturer rooted in Green Bay, Wisconsin. The vertically integrated company now operates more than 40 facilities in 16 states and is known for tying packaging production to responsible forestry, including management of more than 255,000 acres of company forest lands. Its sustainability credentials include SFI-certified sourcing and the first SFI Small Lands Group Certification in the paper industry.
Founded in 1933 by George and Marguerite Kress, Green Bay Packaging remains a third-generation, family-owned company headquartered in Green Bay. Its vertically integrated operations connect forestry resources with the production of custom corrugated packaging and folding cartons, while its 5,000-plus employees work across more than 40 facilities in 16 states. Sustainability is central to the company’s identity, from managing company forestlands to pursuing major mill modernization and emissions-reduction projects.
Founded by Vincent Kelly in 2006, Green Eyes, LLC develops scientific instruments and automated systems for real-time surface-water monitoring, with a particular focus on high-frequency nutrient data. Its equipment grew from Kelly’s University of Maryland environmental research and includes the NuLAB automated nutrient analyzer, along with tools for sampling, sediment erodibility measurement and sensor biofouling control. Green Eyes was acquired by SePRO Corporation in April 2025, while Kelly continues as technical development manager.
Since 1996, Dallas-based Green Valley Food Corporation has grown hydroponic sprouts and other fresh foods, including wheat grass and tofu. Its 60,000-square-foot facility also provides temperature-controlled warehousing and produce inspection services for the Dallas–Fort Worth area. Green Valley puts unusual emphasis on sprout safety, holding every batch until it passes independent microbiological testing under its SQF 2000 level 2, HACCP-based food-safety program.
GreenCarbon turns domestic agricultural waste into hard-carbon anodes and other advanced carbon materials for lithium-ion and sodium-ion batteries. Its plant-powered approach is designed to reduce reliance on foreign supply chains while permanently storing carbon in energy-storage applications. The company also develops carbon materials for uses beyond batteries, including graphene nanomaterials and construction applications.
Baltimore-based and woman-owned, Greenmount Tile makes handmade ceramic tile from American clay, blending digitally enabled prototyping with hands-on tile artistry. Led by principal tile artist Dominique Hellgeth, the company is especially distinctive for its geometric Pentagonal tile collection and custom, one-of-a-kind installations.
Greenway Farms is a family-owned Maryland farm that uses recirculating aquaculture and agriculture systems to raise fresh fish and grow leafy greens and herbs year-round. Based in Gaithersburg, the farm draws on its founders’ international experience in food safety and agricultural technology while supplying restaurants and retailers across the DMV with food grown without antibiotics, pesticides, herbicides, or synthetic fertilizers. Its USDA Harmonized GAP+ and Maryland’s Best Local Farm & Fish certifications underscore the farm’s focus on safe, sustainable local production.
Grimco supplies signmakers and digital print shops with sign-making materials, equipment, and finished traffic signs through a North American wholesale distribution network. Founded as Grimm Stamp and Badge by Henry Grimm, the company began with metal stampings before moving into traffic signs in the 1950s and later expanding into digital printing and aluminum manufacturing. Today, Grimco operates more than 65 locations across North America and also has locations in the United Kingdom.
Grip Boost began in 2012 when University of Maryland chemical-engineering PhDs teamed with former Terps and Baltimore Ravens tight end Matt Furstenburg to develop a gel that restores football gloves’ tackiness. The company now makes science-backed grip equipment for football, baseball, and golf, including its University of Maryland-developed glove gel and Boost Plus gloves. Its team combines sports experience with chemical-engineering expertise, and the company’s gloves meet SFIA specifications for NFHS, NOCSAE, and NCAA play.
GRIPZ grew from Sherwood’s effort to help Lynn continue painting despite hand osteoarthritis. The Silver Spring company now makes Sher-Hold grip attachments for people whose hand discomfort makes everyday activities or creative work difficult.
Established in the United Arab Emirates in 1989, GRP Industries is a composite manufacturer known for protecting sensitive industrial equipment in severe outdoor environments. Its custom weatherproof enclosures serve utility and industrial customers worldwide, with products installed in 93 countries and tested to international protection standards.
gSpin Technologies develops quantum-enhanced radio-frequency coils and sensing systems that improve MRI signal quality, scan speed, and deployment flexibility. Based in Maryland, the company focuses on research-use imaging hardware for high-field and lower-field MRI, while developing integrated molecular-imaging coils and a contactless blood-analysis device. Its QBoosted™ coils are designed to work with most MRI systems up to 3T and are being evaluated through pilot research sites.
Guardian RF grew out of a group of Georgetown University classmates studying physics and signal processing, whose work took them into Ukraine supporting local defense units. The Washington, D.C., company now develops passive RF sensing technology for persistent low-altitude airspace awareness, serving defense and public-safety organizations without emitting signals.
Founded by John K. Gutierrez in Baltimore’s historic Clipper Mill in 1991, Gutierrez Studios designs and hand-fabricates lasting architectural features and furnishings for the built environment. Its designers and craftsmen work from a 20,000-square-foot workshop, taking projects from engineering through installation, whether creating a one-of-a-kind home furnishing or a large commercial feature. The company is a certified Minority Business Enterprise in Maryland and the City of Baltimore.
Founded in Maryland in 2012, GVT is a small business known for helping government agencies solve demanding aerospace mission challenges. Its engineers have supported NASA and NOAA programs from mission design through operations, including the Suomi NPP, NOAA-20, and NOAA-21 missions. GVT’s work at NASA Goddard Space Flight Center includes more than 10 first-tier subcontracts and 50 task orders.
Founded in 1984, H&B Electronic GmbH & Co. KG is a family-run manufacturer based in Deckenpfronn, in the Stuttgart metropolitan region, combining engineering and production at one site. With around 300 employees and 13,500 square metres of facilities, it specializes in precision plastic-metal hybrid components and assemblies, serving customers from industrial electronics, medical technology, and automotive sectors.