| # | Company | Employees |
|---|---|---|
| 1 | 20,440 | |
| 2 |
Los Alamos National Laboratorylanl.gov
Multidisciplinary research institution focused on national security, nuclear stockpile safety, and advanced science in space, energy, computing, medicine, and nanotechnology. |
13,603 |
| 3 |
US Department of Agriculture (USDA) Agricultural Research Service (ARS)ars.usda.gov
A leading agricultural research agency under USDA, conducting cutting-edge projects to improve farming practices and technologies for consumers worldwide |
9,821 |
| 4 |
Lawrence Livermore National Laboratoryllnl.gov
Development and application of advanced science, technology, and engineering to enhance national security, counterterrorism, defense, energy, and environmental challenges. |
9,546 |
| 5 |
OpenAIopenai.com
An AI research and deployment company focused on creating safe and beneficial general-purpose artificial intelligence for the benefit of humanity |
9,268 |
| 6 | 9,164 | |
| 7 |
U.S. Geological Survey (USGS)usgs.gov
Provide impartial scientific data on ecosystems, natural hazards, resources, climate impacts, and core systems for timely environmental information. |
7,704 |
| 8 |
Yale School of Medicinemedicine.yale.edu
A world-renowned center for biomedical research, education, and advanced healthcare with affiliations to leading institutions and a unique curriculum promoting independent thinking |
6,960 |
| 9 |
RTI Internationalrti.org
Independent scientific research institute providing technical, social, statistical, and engineering expertise to solve critical global challenges and improve human conditions. |
6,607 |
| 10 |
Oak Ridge National Laboratoryornl.gov
Conducts scientific research and development to advance energy availability, environmental protection, national security, and technological innovation for the Department of Energy. |
6,512 |
| 11 |
Covance
Global leader in drug development services, partnering with pharmaceutical and biotech companies to bring top prescription drugs to market and provide innovative solutions |
6,294 |
| 12 |
Pacific Northwest National Laboratorypnnl.gov
Research in chemistry, Earth sciences, biology, and data science to enhance energy resiliency and support national security efforts. |
6,257 |
| 13 |
Battellebattelle.org
A science and technology company solving critical issues through research, development, manufacturing, and services for government and commercial clients worldwide |
6,013 |
| 14 |
Indiana University School of Medicinemedicine.iu.edu
A top-ranked medical school offering high-quality education, access to leading research, and a vibrant campus life in multiple Indiana cities |
5,277 |
| 15 |
Berkeley Lablinktr.ee
A national laboratory managed by the University of California for the Department of Energy, focusing on sustainable energy, materials innovation, computing, and scientific exploration |
5,253 |
| 16 |
Argonne National Laboratoryanl.gov
National laboratory conducting advanced scientific and engineering research, developing innovative technologies, collaborating with industry and federal agencies for societal benefit. |
5,137 |
| 17 |
National Institute of Standards and Technology (NIST)nist.gov
An innovative federal agency advancing measurement science, standards, and technology to promote US innovation and industrial competitiveness |
4,946 |
| 18 |
PRA Health Sciencesinvestor.iconplc.com
clinical research organisation combining healthcare intelligence and advanced trial methods to improve efficiency, speed, and quality of clinical trials |
4,426 |
| 19 |
Worldwide Clinical Trialsworldwide.com
A global CRO working with biotech and pharma companies to advance new treatments through clinical trials, bioanalytical services, and evidence studies |
4,181 |
| 20 |
Idaho National Laboratorylinktr.ee
Applied engineering laboratory supporting energy research, nuclear science, national defense, alternative energy, robotics, computing, biofuels, and infrastructure protection. |
4,009 |
| 21 |
National Science Foundation (NSF)nsf.gov
Federal agency funding basic scientific research, supporting education, providing equipment, and promoting progress in science and national welfare. |
3,833 |
| 22 |
National Laboratory of the Rockiesnlr.gov
Research and development of advanced energy systems, focusing on innovative technologies to improve energy efficiency and sustainability. |
3,732 |
| 23 |
Westatwestat.com
Westat provides professional services to improve outcomes in health, education, social policy, and transportation through research, data collection, clinical trials, evaluation, and communication |
3,419 |
| 24 |
U.S. Naval Research Laboratorynrl.navy.mil
Conducts scientific research with applications for the Department of the Navy, the Defense Department and the nation, driving innovative advances for the U.S. Navy and Marine Corps. |
3,372 |
| 25 |
Brookhaven National Laboratorybnl.gov
This company delivers transformative technology and discovery science to address various challenges in energy, environment, and nuclear fields through innovative research |
3,317 |
| 26 |
Broad Institute of MIT and Harvardbroadinstitute.org
Multidisciplinary teams collaborate across labs and programs to address complex biomedical challenges in human biology and disease worldwide. |
3,204 |
| 27 |
X, The Moonshot Factoryx.company
A moonshot factory inventing and launching breakthrough technologies to create a radically better world |
3,149 |
| 28 |
Southwest Research Instituteswri.org
Independent nonprofit organization specializing in creating and transferring technology in engineering and physical sciences, with laboratories and facilities across multiple locations. |
3,135 |
| 29 |
Georgia Tech Research Institutegtri.gatech.edu
A non-profit research organization affiliated with Georgia Tech, focused on advancing technology, providing innovative solutions, and educating future technology leaders |
3,078 |
| 30 | 2,968 | |
| 31 |
n/a - currently unemployedlinkedin.com
A company that provides a platform for sharing a list of potential leads or prospects for businesses |
2,676 |
| 32 |
Mathematicamathematica.org
Provides evidence-based solutions to improve program efficiency, reduce costs, and enhance measurable impact for better policy outcomes. |
2,465 |
| 33 | 2,376 | |
| 34 |
Scripps Researchscripps.edu
A leader in biomedical research, innovation, and education, working to improve human health and create hope for millions worldwide |
2,348 |
| 35 |
Howard Hughes Medical Institute (HHMI)hhmi.org
Funding scientists and innovative research to advance human health, biology understanding, science education, and public engagement nationwide. |
2,304 |
| 36 |
NORC at the University of Chicagonorc.org
An objective research organization partnering with clients to inform decisions on health, education, economy, and government programs for a better world |
2,285 |
| 37 |
SLAC National Accelerator Laboratorywww6.slac.stanford.edu
A diverse workforce of 1,700 employees at the forefront of cutting-edge research in various disciplines, collaborating in a stimulating environment |
2,235 |
| 38 |
University of Maryland School of Medicinemedschool.umaryland.edu
Leading biomedical research institution with top-tier faculty and extensive global reach, dedicated to advancing innovative research in virology, genomics, and global health |
2,179 |
| 39 |
CNA Corporationcna.org
A nonprofit research organization focused on national security, providing actionable solutions to complex problems through data analysis and field programs |
2,094 |
| 40 |
The Henry M. Jackson Foundation for the Advancement of Military Medicinehjf.org
A nonprofit organization supporting military medical research, providing program management services to accelerate progress and advance Military Medicine |
2,036 |
| 41 |
American Institutes for Researchair.org
A nonprofit research institution providing evidence-based solutions for urgent challenges in education, health, workforce, human services, and international development worldwide |
2,010 |
| 42 |
CPCcpcclinicalresearch.org
A non-profit clinical research organization offering clinical research services worldwide, with a focus on innovative research and improving cardiovascular health in Colorado communities |
1,944 |
| 43 |
Inotivinotiv.com
A scientific research company offering comprehensive services and products, with a focus on delivering high-quality data and insights for success |
1,888 |
| 44 |
Advarraadvarra.com
Advarra enhances clinical research by providing IRB and IBC review solutions, innovative technologies, and industry connections to optimize trial participant safety and research performance |
1,839 |
| 45 |
Huntsman Cancer Institutehealthcare.utah.edu
A comprehensive cancer center at a university, providing top-quality care, research, and training to cancer patients and future medical professionals |
1,837 |
| 46 |
The Rockefeller Universityrockefeller.edu
A prestigious bioscience institution focused on uncovering life processes, leading to transformative medical breakthroughs with renowned faculty and cutting-edge facilities |
1,833 |
| 47 |
National Physical Laboratory (NPL)npl.co.uk
The company is the UK's National Metrology Institute providing measurement capabilities to support technological advances, save lives, and ensure reliability |
1,821 |
| 48 |
CNEAcnea.gov.ar
An Argentinian governmental agency focused on developing and controlling nuclear energy for peaceful purposes, operating research centers and nuclear power stations |
1,807 |
| 49 |
Intel Labsintel.com
Leading research in computer science, fostering collaboration between academia and industry, and driving visionary thinking in technology, sciences, society, and culture |
1,658 |
| 50 |
Forresterforrester.com
Provides research, consulting, and events to help leaders use customer-focused insights and data to drive growth and navigate change. |
1,653 |
| 51 |
NIH Innovatesnih.gov
A federal agency focused on researching mental disorders, part of NIH Conducts basic and clinical research to prevent, treat, and cure mental illnesses |
1,542 |
| 52 |
Innovations for Poverty Actionpoverty-action.org
A non-profit organization focusing on research and policy to find and promote effective solutions for global poverty issues |
1,523 |
| 53 |
Fish and Wildlife Research Institutemyfwc.com
The company conducts research on ecosystem assessment and restoration, freshwater and marine fisheries, imperiled species, wildlife studies, and red tides They focus on information science and outreach |
1,499 |
| 54 |
Scripps Institution of Oceanographyscripps.ucsd.edu
A world-renowned institution focusing on ocean and earth science research, education, and public service across various disciplines |
1,484 |
| 55 |
WCGwcgclinical.com
Industry leader in ethical review solutions for clinical research, optimizing quality, safety, and efficiency through data-driven insights and specialized solutions |
1,463 |
| 56 |
Allen Institutealleninstitute.org
An open science organization focused on advancing bioscience to improve human health through foundational research, developing standards, and fostering new ideas |
1,452 |
| 57 |
IEEE Computer Societycomputer.org
Facilitating professional development and collaboration in computer science and engineering through conferences, publications, training, and resources for industry advancement |
1,443 |
| 58 |
Emmes Grouptheemmesgroup.com
A company dedicated to advancing public health and biopharmaceutical innovation by combining human intelligence with artificial intelligence in clinical research |
1,411 |
| 59 |
Cobbcobbgenetics.com
This company promotes global poultry industry with high-quality genetics, innovative research, and worldwide distribution of healthy, affordable protein products |
1,354 |
| 60 |
Woods Hole Oceanographic Institutionwhoi.edu
A nonprofit organization dedicated to ocean research, engineering, and education, focused on advancing solutions for the planet's future |
1,330 |
| 61 |
Samsung Strategy and Innovation Center
A technology innovation center fostering disruptive technologies, investing in startups, and expanding business lines through partnerships and acquisitions |
1,283 |
| 62 |
Salk Institute for Biological Studiessalk.edu
World-class scientists conducting advanced research in neuroscience, cancer, aging, immunobiology, plant biology, and computational biology fields. |
1,249 |
| 63 |
WestEdwested.org
A national nonprofit agency promoting equity and excellence in education through research, development, and services, offering professional growth and benefits |
1,237 |
| 64 |
Emmestheemmesgroup.com
A global Contract Research Organization (CRO) with expertise in clinical research across various therapeutic areas, supporting public health and biopharmaceutical innovation |
1,188 |
| 65 |
New Mexico Institute of Mining and Technologynmt.edu
A leading research university specializing in science, engineering, mathematics, and entrepreneurship, offering undergraduate and graduate degrees in various fields |
1,179 |
| 66 |
CTI Clinical Trial and Consulting Servicesctifacts.com
A global full-service CRO specializing in rare diseases and critical patient populations, offering clinical trial and consulting services worldwide |
1,139 |
| 67 |
AI at Metaai.meta.com
Advancing AI through open science and collaboration, focusing on infrastructure, NLP, generative AI, vision, and human-computer interaction. |
1,101 |
| 68 |
U.S. Army Engineer Research and Development Center (ERDC)erdc.usace.army.mil
A research and development center for the US Army Corps of Engineers, specializing in diverse engineering areas and top-ranked facilities worldwide |
1,052 |
| 69 |
Navitas Life Sciencesnavitaslifesciences.com
Global clinical research organization providing technology-driven CRO services, data science, regulatory support, and industry-focused consulting to biopharmaceutical clients worldwide |
1,014 |
| 70 |
Duke Clinical Research Institutedcri.org
A global leader in clinical research, conducting groundbreaking trials, managing patient registries, and publishing impactful research to improve healthcare quality |
1,009 |
| 71 |
UT Southwestern Careersutsouthwestern.edu
A leading academic medical center with top faculty conducting groundbreaking research, providing exceptional patient care, and offering advanced medical education |
1,000 |
| 72 |
National Institute for Aviation Researchwichita.edu
An aviation research center at Wichita State University providing design, testing, certification, and training to the aviation, defense, and manufacturing industries |
991 |
| 73 |
Cold Spring Harbor Laboratorycshl.edu
Global leader research education. Provides unique stimulating atmosphere doctoral research. Innovative curriculum trains independent thinkers. |
985 |
| 74 |
Sarah Cannon Research Institutescri.com
A leading oncology research organization conducting community-based clinical trials, advancing therapies and enhancing trial access across the country |
975 |
| 75 |
USAMRIID โ U.S. Army Medical Research Institute of Infectious Diseaseshealth.mil
Leading research institute developing medical solutions to protect military and civilian populations from biological threats through vaccines, drugs, diagnostics, and collaborations with government agencies and industry partners |
968 |
| 76 | 962 | |
| 77 |
CenExelcenexelresearch.com
Specializing in clinical research, the network offers support for a variety of indications to help make your clinical trial successful |
935 |
| 78 |
Beroe Incberoeinc.com
Providing procurement insights and AI-driven data solutions to help organizations make faster, smarter decisions and mitigate supply risks effectively. |
932 |
| 79 |
International Food Policy Research Institute (IFPRI)ifpri.org
A research institute focused on sustainable solutions to end hunger and poverty worldwide through evidence-based research in a collaborative environment |
924 |
| 80 |
Institute for Health Metrics and Evaluationhealthdata.org
An independent global health research center providing rigorous measurement of health problems and evaluating strategies to improve population health |
904 |
| 81 |
GE Researchgeaerospace.com
Innovative engine creating differentiated products for aviation, power, transportation, and healthcare sectors Legacy of transformative innovation continues through interdisciplinary research |
904 |
| 82 |
National Institute of Environmental Health Sciences (NIEHS)niehs.nih.gov
The organization based in North Carolina conducts research on how the environment impacts human health to improve overall well-being |
901 |
| 83 |
NSF NCAR - The National Center for Atmospheric Researchncar.ucar.edu
Advancing research and services in meteorology, climate science, environmental science, and STEM education, fostering collaboration and understanding of Earth's systems |
897 |
| 84 |
Population Councilpopcouncil.org
A research organization focused on creating a better world through evidence-based solutions to improve the lives of underserved populations globally |
877 |
| 85 |
Jefferson Labjlab.org
A national accelerator facility in Virginia, leading research into quarks, gluons, and superconducting technology while advancing data analysis capabilities for research |
875 |
| 86 |
Rollins School of Public Health at Emory Universitysph.emory.edu
A top-ranked public health school offering master's and doctorate degrees, interdisciplinary research, and unique dual-degree programs with Emory University schools |
869 |
| 87 |
Savannah River National Laboratorysrnl.gov
A multidisciplinary research center solving environmental and security challenges by applying science to global security, energy, and environmental cleanup |
865 |
| 88 |
Care Accesscareaccess.com
Global research site facilitating access to clinical research to increase availability of new treatments in communities worldwide |
860 |
| 89 |
HRL Laboratories, LLChrl.com
Leading research laboratory focused on groundbreaking technology solutions in circuitry, computing, materials, and data extraction for diverse applications in aerospace, automotive, and consumer products |
860 |
| 90 |
University of Dayton Research Instituteudayton.edu
A national leader in scientific and engineering research providing innovative solutions in materials, energy, aeropropulsion, and more with integrity and commitment |
855 |
| 91 |
Eurofins | EAG Laboratorieseag.com
A scientific services company specializing in advanced materials and integrated circuitry analysis, offering problem-solving expertise to accelerate innovation and ensure quality and compliance |
818 |
| 92 |
Smitherssmithers.com
A multinational provider of testing, consulting, and certification services across various industries, delivering accurate data and innovative solutions through science and expertise |
802 |
| 93 |
Riverside Researchriversideresearch.org
A nonprofit organization conducting independent research in various scientific fields to advance innovation and provide high-value solutions to government customers |
801 |
| 94 |
Princeton Plasma Physics Laboratory (PPPL)pppl.gov
A US Department of Energy National Laboratory focused on developing fusion energy, with a shift towards microelectronics, quantum information science, and sustainability |
800 |
| 95 |
Urban Instituteurban.org
Research institution providing evidence-based solutions to improve lives, strengthen communities, and promote well-being and shared prosperity. |
799 |
| 96 |
LSU AgCenterlsuagcenter.com
Leading research institution supporting Louisiana's agricultural industries, environment, and quality of life through research, extension services, and youth and community programs |
793 |
| 97 |
Space Telescope Science Institutestsci.edu
A leading space institute in Maryland, operating advanced space telescopes, curating data archives, conducting scientific research, and promoting diversity and inclusivity |
763 |
| 98 |
Abdul Latif Jameel Poverty Action Lab (J-PAL)povertyactionlab.org
Global network conducting randomized evaluations to improve poverty reduction programs, informing policy through scientific evidence and training. |
760 |
| 99 |
University of Algiers 3univ-alger3.dz
A prestigious educational institution in Algiers offering a wide range of academic programs and opportunities for students to excel |
743 |
| 100 |
STgeneticslinkedin.com
Improving beef and dairy herd genetics globally through innovative science, technology, gender-sorted semen, and integrated management programs. |
739 |
Turn this list into pipeline
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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 Oct 24, 2026.
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