# List of companies with in-house R&D in New Hampshire

Tamtam tracks 50 companies with in-house R&D headquartered in New Hampshire. This list ranks all of them by number of employees on LinkedIn, led by University System of NH, Dartmouth Hitchcock Medical Center and Clinics and University of New Hampshire. Their median headcount is 543. Half of them were founded in 1984 or later. The most common headquarters are Manchester (7), Hanover (4) and Nashua (4).

These New Hampshire companies with in-house R&D are primarily large employers, with a strong presence of higher education institutions and healthcare providers. Companies like the University System of New Hampshire and Dartmouth Hitchcock Medical Center and Clinics employ thousands, offering education and advanced medical care. Manufacturing also features prominently, with Allegro MicroSystems specializing in power and sensing solutions, and SIG SAUER, Inc. producing firearms.

A notable pattern among these companies is the concentration of headquarters in specific areas. Lebanon and Hanover host several significant organizations, including Dartmouth Hitchcock Medical Center and Clinics and Dartmouth College. Other companies like Timberland (footwear and apparel) and Sitecore (digital experience software) contribute to a diverse industrial landscape across the state.

🇺🇸 New Hampshire · 50 companies · Updated Nov 14, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [University System of NH](https://www.tamtam.ai/c/university-system-of-nh) (usnh.edu)<br>The University System of New Hampshire is a major provider of post-secondary education with multiple institutions impacting thousands of New Hampshire citizens | Higher Education | 🇺🇸 Concord | 9,717 |  |
| 2 | [Dartmouth Hitchcock Medical Center and Clinics](https://www.tamtam.ai/c/dartmouth-hitchcock-medical-center-and-clinics) (dartmouth-hitchcock.org)<br>Integrated health system providing advanced medical care, cancer treatment, pediatric services, and extensive ambulatory clinics across New Hampshire and Vermont. | Hospitals and Health Care | 🇺🇸 Lebanon | 7,814 |  |
| 3 | [University of New Hampshire](https://www.tamtam.ai/c/university-of-new-hampshire) (unh.edu)<br>Public research university offering undergraduate and graduate programs, engaging in teaching, research, creative expression, and community service. | Higher Education | 🇺🇸 Durham | 6,952 |  |
| 4 | [Dartmouth College](https://www.tamtam.ai/c/dartmouth-college) (home.dartmouth.edu)<br>Educates promising students, prepares for lifelong learning and responsible leadership, supported by dedicated faculty focused on teaching and knowledge creation. | Higher Education | 🇺🇸 Hanover | 6,538 | 1769 |
| 5 | [Timberland](https://www.tamtam.ai/c/timberland) (timberland.com)<br>A global leader in footwear and apparel, encouraging employees to embrace adventure and sustainability, offering perks for outdoor activities and career growth opportunities | Retail | 🇺🇸 Stratham | 3,927 |  |
| 6 | [Allegro MicroSystems](https://www.tamtam.ai/c/allegro-microsystems) (allegromicro.com)<br>A global leader in power and sensing solutions for motion control and energy-efficient systems, driving breakthrough advancements in various industries | Semiconductor Manufacturing | 🇺🇸 Manchester | 2,882 | 1990 |
| 7 | [EFI](https://www.tamtam.ai/c/efi) (efi.com)<br>A leading company in digital imaging, EFI offers innovative products for signage, packaging, textiles, ceramic tiles, and personalized documents to enhance productivity | Printing Services | 🇺🇸 Londonderry | 2,691 | 1989 |
| 8 | [Albany International Corp.](https://www.tamtam.ai/c/albany-international-corp) (albint.com)<br>Global producer of custom fabrics for paper and nonwovens, supplier of advanced composite aerospace parts including fan blades and cases. | Textile Manufacturing | 🇺🇸 Rochester | 2,584 | 1895 |
| 9 | [Altra Industrial Motion](https://www.tamtam.ai/c/altra-industrial-motion) (altramotion.com)<br>Designing, producing motion control and power transmission solutions for equipment speed, torque, positioning, and other functions, solving complex customer challenges worldwide. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Braintree | 2,238 |  |
| 10 | [Sitecore](https://www.tamtam.ai/c/sitecore) (sitecore.com)<br>The company provides digital experience software SaaS solution for brands to create memorable customer interactions | Software Development | 🇺🇸 Manchester | 1,745 | 2001 |
| 11 | [SIG SAUER, Inc.](https://www.tamtam.ai/c/sig-sauer-inc) (sigsauer.com)<br>Manufacturer of firearms, electro-optics, ammunition, and suppressors providing elite tactical training and remote weapons stations for military, law enforcement, and civilian markets. | Defense and Space Manufacturing | 🇺🇸 Newington | 1,624 |  |
| 12 | [Dartmouth Health](https://www.tamtam.ai/c/dartmouth-health) (dartmouth-health.org)<br>Leading academic health system in New Hampshire, serving northern New England with top-ranked hospital, comprehensive cancer center, children's hospital, clinics, and research initiatives | Hospitals and Health Care | 🇺🇸 Lebanon | 1,481 |  |
| 13 | [Hypertherm Associates](https://www.tamtam.ai/c/hypertherm-associates) (hyperthermassociates.com)<br>A US manufacturer of industrial cutting products and software, delivering solutions that shape the future for businesses worldwide | Manufacturing | 🇺🇸 Hanover | 1,316 | 1968 |
| 14 | [Velcro Companies](https://www.tamtam.ai/c/velcro-companies) (velcro.com)<br>Global organization providing innovative fastening solutions with over 60 years of experience, owning 400+ patents and global manufacturing locations | Textile Manufacturing | 🇺🇸 Manchester | 1,117 | 1951 |
| 15 | [Laborie](https://www.tamtam.ai/c/laborie) (laborie.com)<br>A world-class medical company specializing in diagnostic equipment and supplies for Urology, Gastroenterology, Gynecology, Obstetrics, and Neonatology, making a positive impact globally | Medical Equipment Manufacturing | 🇺🇸 Portsmouth | 1,068 | 1967 |
| 16 | [Resonetics](https://www.tamtam.ai/c/resonetics) (resonetics.com)<br>Develops and manufactures precision components for medical devices, partnering with R&D teams from prototype to production-scale manufacturing with global facilities. | Manufacturing | 🇺🇸 Nashua | 1,067 | 1987 |
| 17 | [Nordson MEDICAL](https://www.tamtam.ai/c/nordson-medical) (nordsonmedical.com)<br>Global expert in designing, developing, and manufacturing complex medical devices and component technologies, serving interventional, surgical, and specialized markets with innovative solutions | Medical Equipment Manufacturing | 🇺🇸 Salem | 1,014 | 1968 |
| 18 | [Geisel School of Medicine at Dartmouth](https://www.tamtam.ai/c/geisel-school-of-medicine-at-dartmouth) (geiselmed.dartmouth.edu)<br>Medical school focused on innovative research, training healthcare professionals, and improving community health through education and scientific advancement. | Higher Education | 🇺🇸 Hanover | 965 | 1797 |
| 19 | [DEKA Research & Development](https://www.tamtam.ai/c/deka-research-and-development) (linktr.ee)<br>A leading R&D company focusing on innovative products, embracing creativity and technology to improve lives, seeking passionate individuals to join their team | Biotechnology Research | 🇺🇸 Manchester | 850 | 1982 |
| 20 | [Amphenol TCS](https://www.tamtam.ai/c/amphenol-tcs) (amphenol-tcs.com)<br>Designs and manufactures industry-leading high-speed, high-density connectors and backplane systems for networking, communications, storage, and computer markets. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Nashua | 843 |  |
| 21 | [Lindt & Sprüngli USA](https://www.tamtam.ai/c/lindt-and-sprungli-usa) (jobs.lindtusa.com)<br>Fastest growing premium chocolate manufacturer operating a large production facility, research labs, and climate-controlled warehouses for sustainably sourced cocoa bean transformation. | Manufacturing | 🇺🇸 Stratham | 763 | 1925 |
| 22 | [New Hampshire Ball Bearings, Inc. (NHBB)](https://www.tamtam.ai/c/new-hampshire-ball-bearings-inc-nhbb) (nhbb.com)<br>Specialized manufacturer of precision bearing products for aircraft, defense, dental, medical, and high tech industries, especially aerospace applications. | Aviation and Aerospace Component Manufacturing | 🇺🇸 Peterborough | 712 | 1946 |
| 23 | [TURBOCAM International](https://www.tamtam.ai/c/turbocam-international) (turbocam.com)<br>A leader in turbomachinery manufacturing, producing prototype and production parts with advanced machining capabilities, specializing in integrally-bladed parts for aerospace engines | Aviation and Aerospace Component Manufacturing | 🇺🇸 Barrington | 558 | 1985 |
| 24 | [GT Advanced Technologies](https://www.tamtam.ai/c/gt-advanced-technologies) (onsemi.com)<br>Produces high-quality crystal materials such as silicon carbide and sapphire for advanced semiconductors, lasers, and aerospace/defense applications, focusing on expanding supply and reducing costs | Semiconductor Manufacturing | 🇺🇸 Hudson | 550 | 1994 |
| 25 | [Crest Foods Co., Inc.](https://www.tamtam.ai/c/crest-foods-co-inc) (crestfoods.com)<br>Family-owned company manufacturing dry food products since 1946 with divisions for dairy stabilizing systems, consumer products, and contract packaging. | Food and Beverage Manufacturing | 🇺🇸 Ashton | 543 | 1946 |
| 26 | [BURNDY](https://www.tamtam.ai/c/burndy) (burndy.com)<br>Manufactures connectors, fittings, tools, and grounding/bonding solutions for electrical utilities, contractors, maintenance, telecommunication, and renewable energy markets. | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 Manchester | 538 |  |
| 27 | [Symetri USA](https://www.tamtam.ai/c/symetri-usa) (symetri.us)<br>A technology consulting firm providing technical services for planning, design, construction, operations, and maintenance of land and buildings for large-scale projects | Software Development | 🇺🇸 Nashua | 492 | 1994 |
| 28 | [Thayer School of Engineering at Dartmouth](https://www.tamtam.ai/c/thayer-school-of-engineering-at-dartmouth) (engineering.dartmouth.edu)<br>Company offers engineering education without departmental divisions, promoting human-centered innovation Programs include MEM, MEng, MS, PhD, dual degrees, and innovative undergraduate and graduate degrees | Higher Education | 🇺🇸 Hanover | 466 | 1867 |
| 29 | [iCAD](https://www.tamtam.ai/c/icad) (icadmed.com)<br>Using AI, we empower healthcare providers to detect cancer more accurately and quickly, optimizing patient outcomes with proven technologies | Hospitals and Health Care | 🇺🇸 Nashua | 363 | 1984 |
| 30 | [Alene Candles](https://www.tamtam.ai/c/alene-candles) (alene.com)<br>A full-service contract manufacturer specialized in creating high-quality, custom-designed fragranced candles for global retail, boutique, and cosmetic brands | Manufacturing | 🇺🇸 Milford | 321 | 1995 |
| 31 | [Avantium](https://www.tamtam.ai/c/avantium) (avantium.com)<br>Commercialization of technologies converting biomass and CO2 into sustainable materials, including plant-based sugars for FDCA production and advanced catalysis products and services. | Chemical Manufacturing | 🇺🇸 Amsterdam | 306 | 2000 |
| 32 | [York IE](https://www.tamtam.ai/c/york-ie) (york.ie)<br>Advisory and venture capital firm specializing in helping technology companies grow by providing strategic guidance and investing in early-stage B2B SaaS startups | Venture Capital and Private Equity Principals | 🇺🇸 Manchester | 290 | 2019 |
| 33 | [Farm, A Flex Company](https://www.tamtam.ai/c/farm-a-flex-company) (farmpd.com)<br>A healthcare and life science innovation company offering strategic, technological, and product development services to benefit patients and healthcare providers worldwide | Medical Equipment Manufacturing | 🇺🇸 Hollis | 264 | 1971 |
| 34 | [Galvion](https://www.tamtam.ai/c/galvion) (galvion.com)<br>The company specializes in designing and delivering purpose-built solutions for military and tactical missions, enhancing agility and survivability for end-users | Defense and Space Manufacturing | 🇺🇸 Portsmouth | 257 | 2002 |
| 35 | [ElectroCraft](https://www.tamtam.ai/c/electrocraft) (electrocraft.com)<br>Specializing in custom manufacturing of AC, DC, and stepper motors, gearboxes, drives, and linear actuators for industrial, commercial, and consumer markets | Automation Machinery Manufacturing | 🇺🇸 Stratham | 240 |  |
| 36 | [HiArc](https://www.tamtam.ai/c/hiarc) (hiarc.inc)<br>Specializing in engineering and manufacturing medical instrumentation, this company provides innovative solutions to enhance patient care through world-class design and contract manufacturing services | Medical Equipment Manufacturing | 🇺🇸 Merrimack | 209 | 1980 |
| 37 | [Safran Defense & Space, Inc. Optronics](https://www.tamtam.ai/c/safran-defense-and-space-inc-optronics) (safran-dsi.com)<br>Global leader designing and producing high-performance electro-optics and navigation systems for defense and civil applications, including laser rangefinders, targeting solutions, and custom OEM solutions | Defense and Space Manufacturing | 🇺🇸 Bedford | 173 | 1985 |
| 38 | [Kalwall Corporation](https://www.tamtam.ai/c/kalwall-corporation) (kalwall.com)<br>Innovative provider of diffuse daylighting solutions for sustainable, human-centered building design, offering lightweight, shatterproof panels with unrivaled structural integrity | Wholesale Building Materials | 🇺🇸 Manchester | 138 | 1955 |
| 39 | [Labsphere, Inc.](https://www.tamtam.ai/c/labsphere-inc) (labsphere.com)<br>A global company specializing in high-end light measurement solutions, uniform sources, optical coatings, and instrumentation for various industries | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 North Sutton | 104 | 1979 |
| 40 | [Haigh-Farr, Inc.](https://www.tamtam.ai/c/haigh-farr-inc) (haigh-farr.com)<br>Designs, develops, manufactures, and tests conformal antennas for defense, aerospace, and commercial industries, serving high-performance aerospace vehicles and military airborne applications. | Aviation and Aerospace Component Manufacturing | 🇺🇸 Bedford | 72 | 1969 |
| 41 | [Precitech](https://www.tamtam.ai/c/precitech) (precitech.com)<br>This company specializes in designing and manufacturing ultra precision machining solutions for various applications including optical lenses and precision mechanical components | Machinery Manufacturing | 🇺🇸 Keene | 70 | 1962 |
| 42 | [Macy Industries, Inc.](https://www.tamtam.ai/c/macy-industries-inc) (macyindustries.com)<br>Metal fabrication company offering industrial and architectural products, including advanced composites and additive manufacturing services, with a focus on innovative design solutions | Industrial Machinery Manufacturing | 🇺🇸 Hooksett | 67 | 1975 |
| 43 | [Simbex](https://www.tamtam.ai/c/simbex) (simbex.com)<br>Experienced partner in medical device and consumer health product design, specializing in transforming complex ideas into innovative commercial solutions | Medical Equipment Manufacturing | 🇺🇸 Lebanon | 55 | 2000 |
| 44 | [Pelham Plastics, Inc.](https://www.tamtam.ai/c/pelham-plastics-inc) (pelhamplastics.com)<br>A contract manufacturer specializing in medical devices, dedicated to turning customer ideas into reality with efficiency and effectiveness | Medical Equipment Manufacturing | 🇺🇸 Pelham | 48 | 1997 |
| 45 | [Rogue Space Systems Corporation](https://www.tamtam.ai/c/rogue-space-systems-corporation) (rogue.space)<br>Designs satellite vehicles, subsystems providing on-orbit services to satellite operators, setting standards for New Space Economy services. | Space Research and Technology | 🇺🇸 Gilford | 29 | 2020 |
| 46 | [G5 Infrared, LLC](https://www.tamtam.ai/c/g5-infrared-llc) (g5ir.com)<br>Specializing in lens elements, windows, filters, and coatings, providing services for small to high volume production on customer-furnished substrates | Defense and Space Manufacturing | 🇺🇸 Hudson | 28 |  |
| 47 | [603 OPTX a Micro-LAM Brand](https://www.tamtam.ai/c/603-optx-a-micro-lam-brand) (micro-lam.com)<br>Provides diamond turning services for prototype, low volume, and production optical components in various materials, offering turn-key solutions from blanking to coating. | Defense and Space Manufacturing | 🇺🇸 Keene | 22 | 2018 |
| 48 | [Optical Fiber Systems Inc](https://www.tamtam.ai/c/optical-fiber-systems-inc) (opticalfibersystems.com)<br>This company specializes in developing and manufacturing customized laser systems, components, and replacement modules, and provides contract design and manufacturing services for medical applications | Appliances, Electrical, and Electronics Manufacturing | 🇺🇸 New Ipswich | 6 | 2000 |
| 49 | [Advanced Polymerics, Inc](https://www.tamtam.ai/c/advanced-polymerics-inc) (api-smartcoat.com)<br>Innovative company developing smart coatings and functional materials, offering self-healing, VOC-compliant coatings for corrosion protection and moisture control products for various applications | Chemical Manufacturing | 🇺🇸 Salem | 5 | 2015 |
| 50 | [Automated Manufacturing Solutions Inc](https://www.tamtam.ai/c/automated-manufacturing-solutions-inc)<br>The company designs and builds custom machinery for welding, assembly, testing, material handling, robotic systems, and offers controls/systems integration services at reasonable prices | Machinery Manufacturing | 🇺🇸 Londonderry | 5 |  |

## How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 14, 2026.

## More company lists in New Hampshire

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- [Manufacturers in New Hampshire](https://www.tamtam.ai/l/manufacturers-new-hampshire) (62)
- [Multinational companies in New Hampshire](https://www.tamtam.ai/l/multinational-companies-new-hampshire) (60)
- [Critical infrastructure operators in New Hampshire](https://www.tamtam.ai/l/critical-infrastructure-operators-new-hampshire) (39)
- [Hardware manufacturers in New Hampshire](https://www.tamtam.ai/l/hardware-companies-new-hampshire) (39)
- [Education providers in New Hampshire](https://www.tamtam.ai/l/education-companies-new-hampshire) (38)
- [Hospitals and Health Care companies in New Hampshire](https://www.tamtam.ai/l/hospitals-and-health-care-companies-new-hampshire) (36)
- [Healthcare providers in New Hampshire](https://www.tamtam.ai/l/healthcare-providers-new-hampshire) (35)
- [Contract manufacturers in New Hampshire](https://www.tamtam.ai/l/contract-manufacturers-new-hampshire) (30)
- [Professional services firms in New Hampshire](https://www.tamtam.ai/l/professional-services-firms-new-hampshire) (26)
- [IT Services and IT Consulting companies in New Hampshire](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-new-hampshire) (25)

## The same list elsewhere in United States

- [Companies with in-house R&D in the United States](https://www.tamtam.ai/l/r-and-d-companies-united-states) (6,794)
- [Companies with in-house R&D in California](https://www.tamtam.ai/l/r-and-d-companies-california) (1,272)
- [Companies with in-house R&D in Texas](https://www.tamtam.ai/l/r-and-d-companies-texas) (442)
- [Companies with in-house R&D in New York State](https://www.tamtam.ai/l/r-and-d-companies-new-york-state) (417)
- [Companies with in-house R&D in Massachusetts](https://www.tamtam.ai/l/r-and-d-companies-massachusetts) (396)
- [Companies with in-house R&D in Illinois](https://www.tamtam.ai/l/r-and-d-companies-illinois) (322)
- [Companies with in-house R&D in Michigan](https://www.tamtam.ai/l/r-and-d-companies-michigan) (286)
- [Companies with in-house R&D in Ohio](https://www.tamtam.ai/l/r-and-d-companies-ohio) (277)
- [Companies with in-house R&D in Pennsylvania](https://www.tamtam.ai/l/r-and-d-companies-pennsylvania) (255)
- [Companies with in-house R&D in New Jersey](https://www.tamtam.ai/l/r-and-d-companies-new-jersey) (223)
- [Companies with in-house R&D in Florida](https://www.tamtam.ai/l/r-and-d-companies-florida) (221)
- [Companies with in-house R&D in Alabama](https://www.tamtam.ai/l/r-and-d-companies-alabama) (220)
- [Companies with in-house R&D in Georgia](https://www.tamtam.ai/l/r-and-d-companies-georgia) (173)
- [Companies with in-house R&D in Virginia](https://www.tamtam.ai/l/r-and-d-companies-virginia) (166)
- [Companies with in-house R&D in North Carolina](https://www.tamtam.ai/l/r-and-d-companies-north-carolina) (158)
- [Companies with in-house R&D in Wisconsin](https://www.tamtam.ai/l/r-and-d-companies-wisconsin) (154)
- [Companies with in-house R&D in Minnesota](https://www.tamtam.ai/l/r-and-d-companies-minnesota) (146)
- [Companies with in-house R&D in Washington State](https://www.tamtam.ai/l/r-and-d-companies-washington-state) (140)
- [Companies with in-house R&D in Colorado](https://www.tamtam.ai/l/r-and-d-companies-colorado) (112)
- [Companies with in-house R&D in Maryland](https://www.tamtam.ai/l/r-and-d-companies-maryland) (107)
- [Companies with in-house R&D in Indiana](https://www.tamtam.ai/l/r-and-d-companies-indiana) (104)
- [Companies with in-house R&D in New York](https://www.tamtam.ai/l/r-and-d-companies-new-york) (223)
- [Companies with in-house R&D in San Francisco](https://www.tamtam.ai/l/r-and-d-companies-san-francisco) (147)
- [Companies with in-house R&D in Houston](https://www.tamtam.ai/l/r-and-d-companies-houston) (129)

## The same list elsewhere

- [Companies with in-house R&D in the world](https://www.tamtam.ai/l/r-and-d-companies-in-the-world) (34,336)
- [Companies with in-house R&D in North America](https://www.tamtam.ai/l/r-and-d-companies-in-north-america) (7,617)

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Source: https://www.tamtam.ai/l/r-and-d-companies-new-hampshire