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AP Integration is an industrial-trained system integrator known for solving difficult vacuum-equipment problems for optical thin-film and semiconductor manufacturers. The company remanufactures PVD and PECVD production systems, with particular experience bringing aging controls and deposition equipment back into service.
Founded by industry veterans with experience in China operations, APAC Pharmaceutical is a Maryland company known for connecting U.S.-managed chemistry projects with manufacturing in China. It develops and produces technically challenging raw materials for pharmaceutical and biotechnology companies, with work spanning early research through cGMP clinical manufacturing.
Veteran-owned Apertus Solutions is an open-source company shaped by military values of honor and commitment. It supports organizations building trusted computing systems, including through work on the Fidelis Platform, while contributing to open-source communities beyond its own projects.
Apex Flavors, Inc. manufactures and supplies extracts and flavor blends for food and beverage applications. Its offerings include water-soluble and oil-soluble flavors for alcoholic and non-alcoholic beverages, baking, ice cream and frozen desserts, coffee, confections, and other food applications, with custom flavor formulation available.
Apex Tool Group (ATG) is one of the largest manufacturers of professional hand and power tools in the world, serving industrial, vehicle service, aerospace, electronics, construction, and DIY markets. The company manufactures leading brands including SATA, GEARWRENCH, Crescent, Cleco, Weller, and APEX.
Built from the alliance of four established contract-pharmaceutical companies, Aphena Pharma Solutions manufactures and packages products for pharmaceutical, medical-device, biologics and consumer-health markets. Its two FDA-registered U.S. operations pair solid-dose work in Tennessee with liquid and topical manufacturing in Maryland, giving the company 762,000 square feet of facilities and more than 450 employees. Aphena is also DEA licensed for controlled substances and certified to ISO 13485:2016 and ISO 9001:2015 standards.
API Metrology grew from founder Dr. Kam Lau’s invention of the laser tracker at NIST in 1983 into a global metrology company with teams on four continents. It develops precision measurement systems and provides expert services that help manufacturers inspect complex work and keep production equipment accurate. Its calibration work is A2LA ISO 17025 certified.
Family-owned and operated since 1965, APISOURCE creates branded merchandise and brand solutions for organizations across the country and overseas. Its Maryland operation combines in-house decoration and creative work with product sourcing, fulfillment, and e-commerce support across roughly 125,000 square feet of facilities. The company is also a WBENC-certified women-owned business and a GSA contract holder.
Co-created by Jamaican-born makeup artist Jamie Melbourne and beauty strategist Tony Lecy-Siewert, Apostle is a men’s beauty brand built around accessible, inclusive self-expression. Its clean formulas and natural-looking complexion products are designed for men who want daily grooming to feel like a confidence-building ritual rather than a restriction.
AppleTree Collective makes handcrafted wooden journals and pens in the United States, with prompted journals designed to help people record outdoor adventures. The company grew from AppleTree Journals, a father-and-son venture that developed activity-specific logs, and in 2026 Tyler—who joined the original business in 2017—purchased the company. Its journals are made with real wood and can be personalized for experiences ranging from fishing to overlanding.
Founded in 1979, Applied Research Associates is a 100% employee-owned science and engineering company with more than 2,300 employee-owners and over 55 office locations. It conducts research and engineering and manufactures specialized hardware, including robotic platforms and advanced antennas, for government and industry customers. Its work spans national security, infrastructure, health, and energy and environmental challenges.
Founded in Columbia, Maryland, in 1989 as a distributor of crystalline waterproofing materials, AQUAFIN Inc. now manufactures system solutions for waterproofing, concrete repair, moisture control and injection grouting. Its partnership with the Schomburg Group, formed in 2000, broadened the company’s offerings, while production moved to Elkton in 2004. AQUAFIN also provides technical guidance grounded in years of on-the-job construction experience, including phthalate-free InjectProECO grout formulations and rapid Pavemend repair technology.
AquaLith Advanced Materials, founded by physicist Gregory Cooper, develops and manufactures next-generation lithium-ion batteries and battery materials from its Maryland base. Its University of Maryland-licensed technology combines a high-energy cathode, silicon anode, and non-flammable aqueous electrolyte to create safer, lower-cost batteries that can operate efficiently below -50°C. The company’s work was recognized as the University of Maryland’s 2020 invention of the year.
Aquaspace Water Systems develops water filtration systems built around its proprietary Aquaspace Compound, an adaptation of NASA technology first developed by founder Michael Pedersen in 1981. The company’s systems are used in settings ranging from homes to Washington, D.C. public schools, where Aquaspace says its filters serve nearly 4,000 fountains and kitchenette sinks. Based in Forestville, Maryland, Aquaspace also makes whole-house air cleaners alongside its water-treatment equipment.
As a Rite-Hite company, Arbon Equipment supplies industrial loading-dock and facility equipment while providing local service for the systems that keep warehouses moving. Its factory-trained, certified technicians handle industrial and commercial door repair, maintenance and emergency response, with same-day service available in most cases and 24-hour service in some markets. Arbon also supports facility planning through assessments, product demonstrations and equipment recommendations.
From its La Plata shop, Arcadian Computers fabricates domestically assembled high-performance computers and engineers secure, air-gapped networks for federal agencies, defense contractors, and regulated organizations. Owners and lead engineers Jonathan Pollock and Bryan Glotfelty also provide outsourced IT support, custom servers and workstations, and local computer repair for businesses and residents. The company is a registered Small Disadvantaged Business and is verified Section 889 compliant, with GSA SmartPay acceptance and a CAGE code for federal purchasing.
Archer Power Solutions began as a marine electrical and air-conditioning service provider and now designs and handcrafts the Kingfisher line of direct-current marine air conditioners in Maryland. Launched in 2021, the Kingfisher was built by a small team of mechanical, electronic, and software engineers for boaters and off-grid users who need battery-focused cooling without inverters or generators. The company develops its own electronics, firmware, and user interface, testing every unit with a serial-numbered calibration sheet before it leaves the shop.
With more than 15 years of experience and over 500 completed projects, Architectural Sign & Design creates commercial signage for businesses in Frederick, Maryland, and beyond. The company handles the work from custom design through fabrication and installation, with a particular focus on durable three-dimensional signs, accessibility-compliant signage, and branded wall and window graphics. Its team emphasizes precise craftsmanship, clear consultation, and a final quality check on every project.
For more than 20 years, Archival Arts Inc. has been a specialized art-reproduction studio serving artists throughout the Baltimore–Washington region and Delmarva. Based in Halethorpe, the company is known for carefully color-matched giclée work, with artist approval built into its proofing process. It also gives customers a route to market through its MDArtGalleries online gallery.
Arculus Solutions is developing robots and ultra-thin protective coatings for hydrogen and other gas pipelines, with its SputterPig™ system designed to apply coatings inside existing pipe infrastructure. Based in North Bethesda, Maryland, the small team combines materials research from MIT with oil-and-gas field experience and hands-on robotics engineering. Its first U.S. deployment is scheduled for 2026 with N2 Solutions.