The 33 largest companies in Staten Island (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	Staten Island University Hospital siuh.northwell.edu A 714-bed teaching hospital on two campuses offering a wide range of health and wellness services with access to New York's largest health system	Hospitals and Health Care	🇺🇸 Staten Island	2,476	n/a
2	Metro One Security metroone.com Provider of professional security services with a focus on quality workforce, client satisfaction, and adherence to high professional and ethical standards	Security Guards and Patrol Services	🇺🇸 Staten Island	1,904	1984
3	Richmond University Medical Center rumcsi.org Healthcare facility and teaching institution offering a wide range of medical services, including emergency care, surgery, cardiology, and behavioral health services	Hospitals and Health Care	🇺🇸 Staten Island	1,528	n/a
4	City University of New York-College of Staten Island csi.cuny.edu A senior college of CUNY offering a wide range of programs, research opportunities, student services, and championship athletic teams	Higher Education	🇺🇸 Staten Island	1,371	1956
5	Wagner College wagner.edu A competitive private college founded in 1883, offering a curriculum that combines deep learning with practical application, emphasizing liberal arts and interdisciplinary education	Higher Education	🇺🇸 Staten Island	975	1883
6	KDDI America, Inc.us.kddi.com A US subsidiary of a Fortune Global 500 company offering high-quality communications, data centers, and solution services worldwide with a strong reputation	Telecommunications	🇺🇸 Staten Island	591	1989
7	Centers Plan for Healthy Living centersplan.com Managed Medicare and Medicaid plans tailored to the New York community, providing guidance and health choices for healthy living	Hospitals and Health Care	🇺🇸 Staten Island	539	2012
8	Tunnel to Towers Foundation t2t.org The company honors fallen first responders, Gold Star families, and injured veterans by providing mortgage-free homes Inspired by firefighter Stephen Siller's heroic sacrifice on 9/11	Non-profit Organizations	🇺🇸 Staten Island	405	2001
9	Richmond County Ambulance rcambulance.com Richmond County Ambulance provides 24/7 emergency and non-emergency medical transport services in all five boroughs of NYC, including critical care and specialty inter-facility transports	Hospitals and Health Care	🇺🇸 Staten Island	323	n/a
10	SOUTH BEACH PSYCHIATRIC CENTER omh.ny.gov A psychiatric facility in Staten Island and Brooklyn, New York offering inpatient and outpatient services, ACT teams, and transitional living residences	Mental Health Care	🇺🇸 Staten Island	249	1969
11	Reinauer Transportation Companies, LLC reinauer.com A family-owned maritime group offering bulk liquids transportation, ship docking, towing, marine construction, offshore support, and shipyard services with a focus on excellence	Maritime Transportation	🇺🇸 Staten Island	228	1923
12	Seamen's Society for Children and Families seamenssociety.org A nonprofit agency providing innovative solutions to protect and care for vulnerable children and strengthen families through various programs and services	Non-profit Organizations	🇺🇸 Staten Island	180	1846
13	Person Centered Care Services pccsny.org Non-profit organization supporting individuals with disabilities in finding identity and acceptance, creating social change within communities through person-centered care services	Non-profit Organizations	🇺🇸 Staten Island	178	2006
14	Community Health Action of Staten Island chasiny.org This organization in Staten Island provides a wide range of services including HIV prevention, domestic violence counseling, substance abuse support, and community health initiatives	Hospitals and Health Care	🇺🇸 Staten Island	161	1988
15	Joan & Alan Bernikow JCC of Staten Island sijcc.org A community center providing social, recreational, and educational programs for all, with a dedication to inclusivity and harmony among Staten Islanders	Non-profit Organizations	🇺🇸 Staten Island	157	n/a
16	Nitka nitka.com A global software engineering and IT consulting provider with expertise in software development, testing, maintenance, and IT consulting services for various industries	IT Services and IT Consulting	🇺🇸 Staten Island	157	1995
17	A Friendly Face Autism Treatment Services affautism.com An organization focused on providing Applied Behavior Analysis therapy to children with Autism Spectrum Disorder to improve their quality of life	Mental Health Care	🇺🇸 Staten Island	154	2014
18	Hope Home Care, Inc.hopehomecare.com A licensed home health care agency providing professional and paraprofessional services in New York, with a commitment to quality care and Christian principles	Hospitals and Health Care	🇺🇸 Staten Island	148	1987
19	RTR Financial Services, Inc.rtrfs.com Specializing in accounts receivable management for healthcare providers, RTR Financial Services provides customized programs to optimize financial solutions and save money	Financial Services	🇺🇸 Staten Island	133	1998
20	Integrity Senior Services integrityseniorservices.com Providing in-home mental health counseling, case management, and auxiliary services for older adults, caregivers, and the disabled with licensed professionals	Mental Health Care	🇺🇸 Staten Island	54	2004
21	Harvard Business Review Brasil t.me A company specializing in financial investments, recognized as a global leader in the industry	Capital Markets	🇺🇸 Staten Island	47	2004
22	Reliable Office Solutions, Inc reliableoffice.com Provider of office products and solutions in NYC and NJ, offering services such as printers, document management, disaster recovery, infrastructure deployment, and VOIP services	Retail Office Equipment	🇺🇸 Staten Island	37	1975
23	Prendamano Real Estate prereal.com A full-service real estate company offering sales, leasing, consulting, and investment services with a focus on maximizing property exposure for faster sales	Real Estate	🇺🇸 Staten Island	19	2021
24	Centers Care Solutions centerscaresolutions.com Provider of superior Care Management and Care Coordination services for the healthcare industry, focusing on whole patient wellness and disease prevention	Hospitals and Health Care	🇺🇸 Staten Island	18	2017
25	City Decks New York citydecksny.com Professional team of designers and builders creating high-end outdoor spaces, enhancing home comfort and value for a range of clients	Construction	🇺🇸 Staten Island	9	2008
26	BQBP Inc bqbpinc.com A leading retailer of electronics and technology equipment with a focus on high quality products and exceptional customer experience	Retail	🇺🇸 Staten Island	9	2008
27	NextHome Prestige Realty nexthomeprestige.com This company provides information and guidance on buying and selling properties, including tips on financing, negotiating, marketing, and home preparation	Real Estate	🇺🇸 Staten Island	6	2005
28	Leadfwd.ai leadfwd.ai Integrated B2B prospecting, sales outreach, and account-based marketing through AI and ML for unstoppable business growth	Software Development	🇺🇸 Staten Island	4	2006
29	Crawford Bringslid Vander Neut, LLP crawfordpllc.com A law firm providing exceptional service in commercial litigation, real estate transactions, estate planning, and guardianship matters in New York and New Jersey	Law Practice	🇺🇸 Staten Island	3	2015
30	Stout Homes Inc stoutbuild.com Residential remodeling and construction company with 17 years of experience Specializing in new home builds, additions, remodels, and roofing/siding projects	Housing and Community Development	🇺🇸 Staten Island	3	2000
31	USA Mutual Insurance Agency, LLC usamutualins.com Full-service insurance agency providing a range of insurance products in the New York Metropolitan area, with expertise in Property & Casualty and Life & Health coverage	Insurance	🇺🇸 Staten Island	3	2014
32	Unique Coffee Roasters uniquecoffeeroasters.com Redefining coffee roasting since several years ago in a small garage, this company supplies gourmet markets in the New York area.	Food and Beverage Services	🇺🇸 Staten Island	2	1995
33	Pinhas Law P.C.pinhaslaw.com Pinhas Law provides expert legal advice in English, Spanish, and Portuguese for clients in the United States and globally, specializing in Brazilian, contract, corporate, immigration, and international law	Legal Services	🇺🇸 Staten Island	1	2013

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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.

The same list elsewhere in United States

The largest companies in the United States 91,669
The largest companies in California 12,813
The largest companies in New York State 10,485
The largest companies in Texas 8,086
The largest companies in Florida 4,945
The largest companies in Illinois 4,175
The largest companies in Pennsylvania 3,110
The largest companies in Massachusetts 3,093
The largest companies in Georgia 2,632
The largest companies in Ohio 2,618
The largest companies in New Jersey 2,569
The largest companies in Virginia 2,503
The largest companies in Michigan 2,346
The largest companies in North Carolina 2,174
The largest companies in Alabama 1,806
The largest companies in Washington State 1,785
The largest companies in Colorado 1,774
The largest companies in Minnesota 1,700
The largest companies in Maryland 1,527
The largest companies in Wisconsin 1,482
The largest companies in New York 6,920
The largest companies in San Francisco 2,030
The largest companies in Houston 1,791
The largest companies in Chicago 1,668