| # | Company | Employees |
|---|---|---|
| 1 |
Parker Hannifinparker.com
Global leader in motion and control technologies, enabling engineering breakthroughs for a better tomorrow Diversified company providing vital products for various industries worldwide |
56,000 |
| 2 |
Sherwin-Williamssherwin-williams.com
Global supplier of paints, coatings, and related products with extensive distribution network and diverse, innovative workforce worldwide. |
49,925 |
| 3 |
Cleveland Clinicmy.clevelandclinic.org
A not-for-profit academic medical center in Ohio, offering clinical care, research, and education with multiple facilities worldwide |
49,624 |
| 4 | 23,230 | |
| 5 |
University Hospitalsuhhospitals.org
Integrated network of hospitals, health centers, and physician offices providing advanced medical care, research, and specialized treatment across northern Ohio. |
20,455 |
| 6 |
Case Western Reserve Universitycase.edu
Leading research university offering nationally recognized programs in arts, sciences, engineering, medicine, law, business, and social sciences in Cleveland. |
8,529 |
| 7 |
Parker Aerospaceparker.com
Global leader in research, design, manufacture, and service of aerospace systems and components for various markets worldwide Specializes in flight control, hydraulic, and thermal management technologies |
8,030 |
| 8 |
Cleveland-Cliffsclevelandcliffs.com
Leading North American steel producer with vertical integration from raw materials to steel production, serving automotive and other industries with flat-rolled steel products |
7,867 |
| 9 |
Life Care Centers of Americalcca.com
A privately-owned company providing exceptional patient care through post-acute services, therapy, and rehabilitation in over 200 facilities with experienced multidisciplinary teams |
7,421 |
| 10 |
CrossCountry Mortgage, LLCcrosscountrymortgage.com
Nationwide mortgage lender providing fast, clear home loans with strong community focus, dedicated team, and philanthropic efforts. |
6,454 |
| 11 |
AML RightSourceamlrightsource.com
Provides trained professionals for Anti-Money Laundering, Bank Secrecy Act, and financial crimes compliance, including transaction monitoring and due diligence. |
6,341 |
| 12 |
Lincoln Electriclincolnelectric.com
Global leader in arc welding, robotic welding systems, plasma and oxyfuel cutting equipment, brazing and soldering alloys manufacturing and support. |
5,764 |
| 13 |
American Greetingscorporate.americangreetings.com
A global leader in the Celebrations marketplace, offering products online and in-store to help people celebrate holidays and special moments |
5,467 |
| 14 |
The MetroHealth System (Cleveland, OH)metrohealth.org
Healthcare system focusing on community health by addressing social determinants, providing integrated care, and emphasizing disease prevention alongside treatment |
5,352 |
| 15 |
Hyster-Yale Materials Handlinghyster-yale.com
Design, manufacture, and service of lift trucks, attachments, and power solutions under multiple brand names worldwide. |
4,535 |
| 16 |
Cleveland Metropolitan School Districtclevelandmetroschools.org
The Cleveland Metropolitan School District aims to provide high-quality education with autonomy and accountability for performance, focusing on student achievement |
4,322 |
| 17 |
Cleveland State Universitycsuohio.edu
Established in 1964, this urban research university offers over 200 academic programs to 17,000+ students and is recognized as one of America's Best Colleges |
4,317 |
| 18 |
Applied Industrial Technologiesapplied.com
Value-added distributor providing industrial motion, fluid power, flow control, automation technologies, and maintenance supplies to MRO and OEM markets. |
3,860 |
| 19 |
Squire Patton Boggssquirepattonboggs.com
A global law firm with over 1,500 lawyers across four continents, providing legal insight and support for businesses in various sectors |
3,630 |
| 20 |
Cuyahoga Community Collegetri-c.edu
Ohio's largest community college offering over 1,000 credit and 600 non-credit courses annually, with e-learning options and multiple campus locations |
3,536 |
| 21 |
Medical Mutualmedmutual.com
Provides diverse health, life, disability, dental, vision, and indemnity plans, including fully insured, self-funded group, Medicare, and individual plans. |
3,216 |
| 22 |
Cuyahoga Countycuyahogacounty.gov
Promotes regional growth, economic opportunity, individual well-being, regional collaboration, and superior service through diverse workforce roles. |
3,047 |
| 23 |
Valsparsherwin-williams.com
Global leader in manufacturing and distributing paints, coatings, and related products to various customers, offering a friendly, safe work environment with growth opportunities |
2,795 |
| 24 |
Flexjetflexjet.com
A leading provider of fractional jet ownership and leasing, offering a diverse fleet, top safety ratings, personalized service, and innovative programs |
2,741 |
| 25 |
Park Place Technologiesparkplacetechnologies.com
Global leader in data center and networking optimization, serving 21,000+ companies worldwide, improving infrastructure performance, maximizing IT staff efficiency, and optimizing budgets |
2,578 |
| 26 |
KeyBank Commercialkey.com
Full-service commercial and investment bank offering capital markets solutions, mortgage finance, equipment finance, public finance, and commercial payments for middle market clients. |
2,573 |
| 27 |
AK Steel Corporationclevelandcliffs.com
Cleveland-Cliffs is a leading North American steel producer, specializing in iron ore pellets and a variety of steel products for diverse markets |
2,433 |
| 28 | 2,008 | |
| 29 |
NASA Glenn Research Centernasa.gov
The company is a NASA center near Cleveland with world-class facilities for aerospace research and testing, essential to the agency and regional economy |
1,775 |
| 30 |
Dealer Tiredealertire.com
The company helps auto manufacturers and dealers increase tire and light maintenance sales by providing actionable intelligence and comprehensive business support |
1,571 |
| 31 |
Case Western Reserve University School of Medicinecase.edu
Leading medical school with innovative education, groundbreaking research, creating physicians, scientists, and healthcare professionals, and advancing community healthcare globally and locally |
1,540 |
| 32 |
BDIbdiexpress.com
A global supplier and service provider for manufacturing companies, offering technical expertise, cost-saving solutions, and prompt response to customer needs |
1,531 |
| 33 |
Kirby Companykirby.com
Manufactures premium vacuum cleaner systems. Products help protect home investments, extend carpet, floor, and furniture life. Sold globally through independent distributors. |
1,361 |
| 34 |
AmTrust North AmericaAmTrustFinancial.com
Provider of workers' compensation and commercial insurance to small and mid-sized businesses in niche markets through independent agents A subsidiary of multinational insurer |
1,319 |
| 35 |
Alerisaleris.com
A global leader in aluminum rolled products serving major customers in aerospace, building, containers, transportation industries with advanced manufacturing capabilities |
1,235 |
| 36 |
Delta State Universitydeltastate.edu
A diverse and family-oriented university in the Mississippi Delta offering personalized education and career opportunities for students at all levels |
1,200 |
| 37 |
Cliffs Natural Resourcesclevelandcliffs.com
A leading iron ore mining company in the US supplying pellets to the steel industry, with operations in Michigan, Minnesota, and Western Australia |
1,189 |
| 38 |
Cleveland Guardiansmlb.com
Established in 1901, we are dedicated to creating memories and connecting generations by providing entertainment and superior customer service to millions of fans |
1,185 |
| 39 |
United Church of Christucc.org
The organization is a diverse community of Christians working together to serve God in creating a just and sustainable world |
1,184 |
| 40 |
Federal Reserve Bank of Clevelandclevelandfed.org
Formulates monetary policy, supervises banks, provides payment services, and supports economic stability in the Fourth Federal Reserve District. |
1,176 |
| 41 |
Check Into Cashcheckintocash.com
A leading organization in the financial industry, offering career growth opportunities, competitive rewards, work-life balance, and a range of job openings |
1,129 |
| 42 |
Consolidated Precision Products Corpcppcorp.com
Global network of facilities specializing in high-precision aerospace components & sub-assemblies, dedicated to exceeding customer expectations, developing talent, and continual improvement |
1,108 |
| 43 |
KeyBanc Capital Marketskey.com
A national platform with over 800 professionals, providing capital, equity research, and deep industry expertise across seven sectors for clients' success |
1,091 |
| 44 |
Austin Powderaustinpowder.com
The company manufactures industrial explosives, accessories, and offers technical blasting services globally |
1,090 |
| 45 |
CBIZ Advisory Servicescbiz.com
A financial services division providing accounting, tax, consulting, audit, and industry-specific services to clients nationwide, in collaboration with an independent CPA firm |
1,055 |
| 46 |
Cohen & Cocohenco.com
A highly reputable tax and accounting firm offering assurance, tax, and advisory services to a wide range of clients globally Founded in 1977 with over 800 professionals |
1,045 |
| 47 |
Lee Universityleeuniversity.edu
A private, comprehensive university in Tennessee, Lee offers Christ-centered education with top-tier rankings and significant growth in programs and enrollment |
1,042 |
| 48 |
Benesch Lawbeneschlaw.com
Provides sophisticated legal services to national and international public and private companies, private equity funds, entrepreneurs, and not-for-profit organizations. |
949 |
| 49 |
Cleveland Cavaliersnba.com
Professional basketball team competing in the NBA, sharing a venue with hockey and esports teams, focusing on high-level performance. |
936 |
| 50 |
Thompson Hine LLPthompsonhine.com
A leading full-service business law firm known for innovation, offering efficient, client-focused legal services through Thompson Hine SmartPaTH庐 |
933 |
| 51 |
ArcelorMittal USAclevelandcliffs.com
Produces flat-rolled carbon steel products for automotive, construction, and appliance markets, utilizing mining and raw materials for integrated steel production. |
928 |
| 52 |
The NRP Group LLCnrpgroup.com
The company is a multifamily housing developer, owner, builder, and manager, creating exceptional rental housing opportunities for individuals and families |
925 |
| 53 |
CommuteAircommuteair.com
Regional airline operating flights for United Airlines with a fleet of over 60 Embraer ERJ145 aircraft, connecting people to United's global network |
904 |
| 54 |
ACCEL Schoolsaccelschools.com
A network of over 90 high-performing charter schools advocating for school choice and addressing educational inequities with innovative models and inclusive environments |
830 |
| 55 |
Cleveland Integrity Servicesclevelandintegrity.com
Provider of support services to Energy, Telecommunications, and Power industries including project scoping, scheduling, inspection, procurement, and land services |
822 |
| 56 |
Forest City Realty Trust
A national real estate company based in Cleveland, Ohio, with a diverse portfolio of commercial and residential properties throughout the United States |
803 |
| 57 |
City of Cleveland - City Hallclevelandohio.gov
Providing high-quality city services, prioritizing neighborhoods, enhancing safety, and modernizing city operations to benefit residents and businesses. |
784 |
| 58 | 758 | |
| 59 |
Oatey Companyoatey.com
Manufacturing and distributing reliable plumbing products for residential and commercial builders, contractors, engineers and DIY consumers through a global supply network. |
756 |
| 60 |
Cleveland Metroparksclevelandmetroparks.com
A nationally recognized park system in Northeast Ohio with over 24,000 acres, 18 reservations, trails, golf courses, lakefront parks, dining, retail, and Cleveland Metroparks Zoo |
752 |
| 61 |
Quadax, Inc.quadax.com
A trusted healthcare partner offering revenue cycle optimization solutions through business analytics and superior service to enhance reimbursement of care |
749 |
| 62 | 746 | |
| 63 |
Greater Cleveland RTAriderta.com
Large public transit agency providing bus, rapid rail, trolley, and paratransit services for thousands of daily passengers across Cuyahoga County, Ohio. |
744 |
| 64 |
Supply Technologiessupplytechnologies.com
Global partner in total supply chain management, specializing in efficient supply of parts and materials for manufacturing companies to build products better and faster |
714 |
| 65 |
Weltman, Weinberg & Reis Co., LPAweltman.com
With nearly a century of experience, this full-service law firm specializes in creditors' rights, representing major financial institutions in various legal matters |
708 |
| 66 |
Lakeshore Collegelakeshore.edu
A provider of technical education, offering career programs, associate degrees, diplomas, certificates, apprenticeship programs, distance learning, customized training, and continuing education |
699 |
| 67 |
Dwellworksdwellworks.com
Global mobility solutions company offering destination services, property management, appraisals, and temporary accommodations with a focus on integrity, teamwork, innovation, and sustainability |
697 |
| 68 |
Hospice of the Western Reservehospicewr.org
Provider of hospice and palliative care services, along with bereavement support, throughout Northern Ohio regardless of ability to pay |
679 |
| 69 |
Bath and Bodyworksbathandbodyworks.com
A restaurant company located in Cleveland, Tennessee that specializes in bath and body products |
674 |
| 70 |
EOX Vantageeoxvantage.com
EOX Vantage provides premier service and operational efficiencies through their Enterprise Operating System, automation, and managed services, empowering businesses with data and insights |
667 |
| 71 |
Third Federalthirdfederal.com
A company committed to love, trust, respect, and excellence, helping people achieve homeownership and financial security while creating value for communities and stockholders |
667 |
| 72 |
Fairview Hospitalmy.clevelandclinic.org
Faith-based community hospital with 517 beds, offering comprehensive healthcare services including Level II Trauma Center, Cancer Center, Heart Center, and Surgery |
647 |
| 73 |
KeyBank Real Estate Capitalkey.com
A national finance platform specializing in commercial and multifamily real estate, offering a range of services including construction loans, mortgages, and agency financing solutions |
645 |
| 74 |
The Centerslinktr.ee
Provider of integrated health and wellness services, family support programs, and innovative 2Gen approach to create educational success and economic prosperity in Northeast Ohio |
610 |
| 75 |
Oswald Companiesoswaldcompanies.com
Established in 1893, employee-owned insurance brokerage firm partnering with Assurex Global, providing risk management services to clients in the US and worldwide |
609 |
| 76 |
Rainbow Babies and Children's Hospitaluhhospitals.org
Specialized hospital focused on providing healthcare services to babies and children, with a commitment to excellence and compassionate care |
606 |
| 77 |
Applied Fluid Powerappliedfluidpower.com
The company specializes in developing and delivering fluid power solutions to optimize operations and maximize machine performance for efficient industry operations |
594 |
| 78 |
PartsSource Inc.partssource.com
A leading B2B marketplace for healthcare providers and suppliers, helping them improve operations, productivity, costs, and supply chain resiliency |
585 |
| 79 |
Arrow International, Inc.arrowinternational.com
Global manufacturer and distributor of pull tabs, bingo products, and electronic gaming devices for charitable organizations through manufacturing and distribution facilities worldwide. |
580 |
| 80 |
Trousdale Living Communitiestrousdalelc.org
A nonprofit organization providing preeminent care and career development opportunities across multiple Continuing Care Retirement Communities and Health & Rehab Facilities |
577 |
| 81 |
University Teesuniversitytees.com
A company founded by college students, specializing in custom apparel, with a focus on developing people and changing lives |
575 |
| 82 |
Middough Inc.middough.com
A top US firm providing engineering, architectural, and management services worldwide for a range of industries since 1950 |
575 |
| 83 |
The Garland Company, Inc.garlandco.com
Provides high-performance roofing and building envelope solutions for commercial, industrial, and institutional markets with extensive global professional network. |
570 |
| 84 | 558 | |
| 85 |
OverDrivecompany.overdrive.com
Provides digital catalogs including ebooks, audiobooks, and video to libraries and schools globally, through apps like Libby and Sora, promoting literacy and access. |
545 |
| 86 |
Construction Employers Association (CEA)ceacisp.org
Leading contractor association in Northeast Ohio offering membership benefits like free OSHA 30 training, professional development, and industry advocacy opportunities through various trade associations |
533 |
| 87 |
Catholic Charities, Diocese of Clevelandccdocle.org
A comprehensive health and human services organization in Northeast Ohio, providing assistance to individuals of all races and religions |
519 |
| 88 |
Mazzellamazzellacompanies.com
The company provides lifting solutions, slings, cranes, hoists, engineered lifting devices, training, inspection, repair services, and manufactures metal products |
514 |
| 89 |
RelateCare | Care is in our namerelatecare.com
A patient engagement solutions organization specializing in patient access and clinical communication services, formed as a joint venture in 2013 |
506 |
| 90 |
MAI Capital Managementmai.capital
A leading investment adviser providing comprehensive wealth management services, specialized financial planning, and fiduciary duty to empower clients' financial success |
503 |
| 91 |
Tucker Ellis LLPtuckerellis.com
Full-service law firm with over 230 attorneys nationwide, serving Fortune 250 clients with tailored client service teams in various locations |
502 |
| 92 |
Northeast Ohio Regional Sewer Districtneorsd.org
This company in Northeast Ohio manages wastewater and stormwater to protect public health and the environment through treatment programs and projects |
488 |
| 93 |
CLEVELAND ISDclevelandisd.org
This company based in Cleveland, Texas, provides primary and secondary education services |
478 |
| 94 |
PS Salon & Spasalonps.com
PS Salon & Spa provides professional salon & spa experiences for senior living communities nationwide, offering a range of services and resources |
473 |
| 95 |
Tech Elevatortechelevator.com
Intensive coding bootcamps teaching diverse individuals software development skills, career readiness, and job placement assistance for the modern workforce |
472 |
| 96 |
Cleveland Clinic Researchlerner.ccf.org
Global research organization collaborating with physicians to translate laboratory discoveries into advanced patient care within an international hospital system. |
471 |
| 97 |
Cleveland Clinic Lerner College of Medicinemy.clevelandclinic.org
A partnership between Cleveland Clinic and Case Western Reserve University offering a unique medical school program for physician investigators integrating research and clinical medicine |
460 |
| 98 |
Cuyahoga County Board of Developmental Disabilitiescuyahogadd.org
The company supports and empowers individuals with developmental disabilities to live, learn, work, and play in the community, regardless of background |
460 |
| 99 |
Kurvkurvpay.com
Providing SMBs with flexible, tech-driven payment solutions and comprehensive tools to simplify transactions, support growth, and enhance business partnerships. |
453 |
| 100 |
ExactCareexactcarepharmacy.com
ExactCare provides comprehensive pharmacy services to patients with complex medical needs, focusing on improving adherence and enabling safer medication regimens for better health outcomes |
446 |
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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 9, 2026.
The same list elsewhere in United States
- The largest companies in the United States 91,636
- The largest companies in New York 6,921
- The largest companies in San Francisco 2,031
- The largest companies in Houston 1,790
- The largest companies in Chicago 1,669
- The largest companies in Los Angeles 1,245
- The largest companies in Atlanta 1,146
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- The largest companies in Boston 988
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