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Founded by Barry Johnston in 2000, HighQ, LLC provides hazardous-material packaging training, testing, and validation for organizations shipping specimens and related hazards. Its HighQ Testing laboratory is an approved U.S. Department of Transportation third-party facility, with particular experience in biomedical Class 6.2 and Category B packaging. The company also operates environmental chambers for package temperature and humidity validation and teaches DOT and IATA/ICAO shipping requirements.
Founded by David Drucker, highresolution® printing has spent more than 40 years turning demanding brand concepts into high-end printed materials and packaging. The company combines specialty printing expertise with creative consultation and finishing, serving designers and major brands across the East and West coasts. Its work has earned more than 50 industry and design awards for clients, while its founder remains closely involved as a strategic production partner.
Highrise makes functional protein bars designed to fuel mornings and support nighttime recovery. The emerging brand is currently sampling its products and inviting customers to join its early-access list.
HighStarr Copy & Print Services is a full-service print shop serving businesses and organizations from locations in Annapolis and Maple Lawn. It helps customers take projects from concept to finished print, with particular experience supporting real-estate professionals and families arranging memorial services.
Launched in 2018 to commercialize discoveries by University of Maryland professor Liangbing Hu, HighT-Tech Inc. is a Beltsville materials company built around rapid, high-temperature processing. Its patented Pulse Heating technology reaches up to 3,000°C in seconds and is being scaled from research into industrial applications, including lower-cost catalysts for chemical and refinery operations.
Based in North Bloomfield, Ohio, Hightek Outdoor Living makes durable outdoor furniture from recycled high-density polyethylene (HDPE) poly, including seating and tables designed for year-round use. Its furniture is built not to rot or splinter, incorporates UV protection to resist fading, and uses stainless-steel fasteners, with a lifetime limited warranty for residential HDPE material and hardware. The company’s collections range from relaxed rocking chairs to fire tables and dining furniture for patios, porches, and outdoor gatherings.
Founded in 2011 by scientist and entrepreneur Liping Liu, HighTide Therapeutics is a biopharmaceutical company developing multifunctional, multi-targeted therapies for cardiovascular-kidney-metabolic diseases. Its lead candidate, HTD1801, is an oral metabolic modulator built from berberine and ursodeoxycholic acid and is being evaluated in global clinical programs. HighTide also maintains an early-stage research portfolio spanning acute inflammatory disease, weight modulation and neurodegenerative conditions.
Since 1985, Highway Traffic Supply has served municipalities and public agencies from Pearl River as a manufacturer and seller of traffic-safety signage. Its work centers on MUTCD-compliant signs, including custom aluminum signs for public-use applications.
From its Pennsylvania operation, Highwood USA makes outdoor furniture and home-and-garden pieces from proprietary synthetic lumber designed to look like wood without cracking, peeling, or rotting. The company says it has been innovating in the poly-lumber market for more than 20 years, with its furniture made in the USA by Pennsylvania craftsmen and its materials also supplied for OEM applications. Its flagship Highwood HDPS material is made from recycled plastics and carries a 12-year residential warranty.
With roots in Newport News Shipbuilding, founded in 1886, and Ingalls Shipbuilding, founded in 1938, HII is a defense company shaped by more than 140 years of American shipbuilding. Formed as an independent company in 2011, it now employs more than 45,000 people and is known for building the nation’s nuclear-powered aircraft carriers for the U.S. Navy. HII also develops mission technologies for defense and intelligence customers.
Founded in 1978, Hikma Pharmaceuticals PLC is a global pharmaceutical company that develops and manufactures medicines and supplies more than 825 generic, specialty, and branded products. It operates 29 manufacturing plants across North America, Europe, and the Middle East and North Africa, with businesses spanning injectables, Hikma Rx, and branded medicines.
Hiland Wood Products manufactures solid-wood molding, cabinet doors, dimensional millwork, and drawer boxes from its facility in Walnut Creek, Ohio. It sells mostly unfinished products to cabinet and furniture shops, builders, lumber yards, commercial product manufacturers, and individuals, and its in-house tooling and flexible production support standard and custom profiles. Its lumber warehouse maintains a daily inventory of 450,000 board feet across fifteen wood species.
Since 1942, Hilasal has made terry-cloth products and luxury towels, carrying production from American-grown cotton bale to finished towel under one roof at its mill in El Salvador. The company specializes in custom designs, including printed and jacquard towels, and supports U.S. distribution through a Miami facility. Hilasal also converts 90 percent of local supplier and in-house waste into energy that powers its mill.
Hildreth Farm Market is a four-generation family farm and market in Lincoln’s Niagara Region, growing fresh fruit and vegetables on more than 20 acres and selling them alongside Ontario-made goods. Produce is picked daily, with the market also featuring seasonal baked pies and locally made preserves. The Hildreths have been part of the Lincoln community for over four generations and source only from local Ontario farms when produce is not grown on their own land.
From its Marion, Ohio foundry and machine shop, Hildreth Manufacturing makes beryllium-copper plunger tips for die-casting operations. The company also handles custom non-ferrous casting and machining, using proprietary HM-10 and HM-20 alloys, patented Center Cast Technology, and MAZAK CNC equipment. Its quality lab uses a Spectrolab Model F spectrometer, while stocked tip sizes and same-day shipping support customers needing quick turnaround.
Hildreth’s Glass is a family-owned, second-generation glass and glazing company that designs, fabricates, and installs custom glasswork for homes and commercial spaces. With a forty-year tradition on Long Island, the Bohemia company is especially known for custom shower enclosures and mirrors, while its larger facility and showroom support more specialized fabrication and installation work. Hildreth’s works from customers’ or builders’ plans to turn distinctive glass and metal designs into finished spaces.
Hilecrest Farm is a dairy product manufacturer.
Baltimore’s HILGARTNER Natural Stone Company traces its roots to 1863, when Ludwig Hilgartner and Gottfried Schimpf formed a stone company that grew into a longstanding local institution. After more than 150 years in the trade, HILGARTNER is especially known for preserving the skilled marble-finishing craft through its state-accredited apprenticeship program and for restoring historic stonework with traditional artisan knowledge.
Hill & Smith Inc. is a Columbus, Ohio-based manufacturer of infrastructure and roadside safety products, formed in 2008 to expand its parent company Hill & Smith PLC’s HS Roads and Security operations into the United States. It developed Zoneguard, a portable steel barrier system, and now operates manufacturing locations across the country, focusing on transportation safety for road workers and motorists.
Founded in 1930, Atlanta-based Hill Manufacturing Company makes specialty chemical maintenance products for industrial, commercial and institutional facilities. Its catalog spans more than 2,000 formulations, including products such as the Hilco Lube moisture displacer and Ban-o odor eliminator, and the privately owned company currently serves customers across the Eastern United States.