| # | Company | Employees |
|---|---|---|
| 1 |
Merakeymerakey.org
A non-profit provider offering integrated developmental, behavioral health, and education services nationwide, focusing on innovative care solutions for individuals and communities |
2,901 |
| 2 |
American College of Physiciansacponline.org
Largest organization representing internal medicine physicians, subspecialists, and students focused on adult health, diagnosis, treatment, and compassionate care. |
2,189 |
| 3 |
Resources for Human Developmentrhd.org
A human services organization based in Philadelphia empowering vulnerable populations to achieve independence through innovative programs across 14 states |
1,782 |
| 4 |
Youth Advocate Programs, Inc.yapinc.org
A national nonprofit providing community-based services as an alternative to youth incarceration and child welfare placements, prioritizing equal opportunities and non-discrimination |
1,488 |
| 5 |
SAE Internationalsae.org
Global association uniting engineers, providing knowledge, setting industry standards, promoting lifelong learning, and supporting philanthropic programs for mobility engineering professionals. |
1,304 |
| 6 |
JEVS Human Servicesjevshumanservices.org
This organization provides a wide range of services including skills training, vocational rehabilitation, recovery services, and more to support individuals in need |
1,124 |
| 7 |
The Pew Charitable Trustspewtrusts.org
Use data and rigorous research to address societal challenges, foster collaboration, and advance fact-based solutions for measurable progress. |
1,021 |
| 8 |
Greater Philadelphia YMCAphilaymca.org
The organization promotes youth development, healthy living, and social responsibility through impactful programs in the Greater Philadelphia community |
950 |
| 9 |
ASTM Internationalastm.org
Creating and setting global standards to improve lives and enhance performance in various industries, offering innovative business services and products |
789 |
| 10 |
HOPE Internationalhopeinternational.org
A Christian non-profit providing Christ-centered financial services to empower families in underserved communities through savings groups and microfinance institutions worldwide |
758 |
| 11 |
Public Health Management Corporationphmc.org
A nonprofit public health institute in the Greater Philadelphia region, providing outreach, education, research, planning, and direct services to improve community health |
748 |
| 12 |
Community Behavioral Healthcbhphilly.org
A nonprofit managing behavioral health services for Medicaid recipients in Philadelphia, focused on improving mental wellness through high-quality, accountable care |
694 |
| 13 |
Philadelphia Corporation for Agingpcacares.org
This nonprofit agency funds and coordinates programs to support older Philadelphians and those with disabilities, promoting health, independence, and productivity |
563 |
| 14 |
American Board of Internal Medicineabim.org
A company specializing in certifying internists in internal medicine and its subspecialties, upholding the highest standards for patient care |
527 |
| 15 |
Esperanzaesperanza.us
Faith-based organization focused on serving the Hispanic community through education, housing, economic development, legal services, job training, and advocacy |
523 |
| 16 |
Service Access & Management, Inc.sam-inc.org
A not-for-profit case management organization providing services to over 25,000 individuals in communities within their service area |
505 |
| 17 |
American Friends Service Committeeafsc.org
Quaker organization promoting peace and justice through faith-based action, nurturing change and respect for human life and social systems. |
491 |
| 18 |
The Bair Foundationbair.org
A non-profit ministry offering quality care and services to children, youth, and families in 9 states, with child-centered and family-focused programs |
456 |
| 19 |
American Association for Cancer Researchaacr.org
A leading professional organization dedicated to advancing cancer research through conferences, publications, funding, and advocacy for the prevention and cure of cancer |
425 |
| 20 |
The Children's Institute of Pittsburghamazingkids.org
The company provides a range of services including educational, autism, health, early intervention, and family support to help children and families thrive |
397 |
| 21 |
PMHCC, Inc.pmhcc.org
A not-for-profit organization in Philadelphia managing human services programs, including behavioral health, substance abuse, and intellectual disabilities, with a focus on public well-being |
389 |
| 22 |
AMPP: Association for Materials Protection and Performanceampp.org
A global organization focusing on asset protection and materials performance, created through the merger of NACE International and SSPC Headquarters in the US |
386 |
| 23 |
George Junior Republicgjr.org
The organization helps at-risk youth transition into successful adults by instilling citizenship, responsibility, and self-awareness through various programs since 1909 |
371 |
| 24 |
Holcomb Behavioral Health Systems - A Chimes Companyholcombbhs.org
Provider of mental health, substance abuse, and developmental disability services in Pennsylvania, New Jersey, Delaware, and Maryland, promoting individual potential and dignity |
365 |
| 25 |
National Association of Colleges and Employersnaceweb.org
An organization connecting college career services professionals and HR/staffing professionals, providing insights, trends, benchmarks, and legal information for employment |
361 |
| 26 |
Goodwill Keystoneyourgoodwill.org
This nonprofit organization in PA recycles donations into training, paychecks, and opportunities for individuals and families to thrive and flourish |
345 |
| 27 |
SPIN Inc.spininc.org
A leading non-profit providing support for individuals with autism and developmental disabilities, along with high-quality early childhood education in Philadelphia and the Lehigh Valley |
339 |
| 28 |
Tech Impacttechimpact.org
A nonprofit organization providing technology support and training to nonprofits and young adults to help them better serve their communities |
330 |
| 29 |
YMCA of Greater Pittsburghymcapgh.org
A nonprofit organization dedicated to youth development, health, and community support through programs promoting well-being, education, and social responsibility |
327 |
| 30 |
Adelphoiadelphoi.org
The organization provides care, education, housing, and philanthropic support to at-risk youth and families in need within the community |
323 |
| 31 |
JEVS Care at Homejevsathome.org
A not-for-profit organization providing non-medical home care support services to disabled and aging clients in various counties in Pennsylvania |
316 |
| 32 |
American Bible Societyamericanbible.org
Nonprofit organization dedicated to making the Bible accessible, affordable, and alive for all, with a mission to transform lives through God's Word |
278 |
| 33 |
Housing Authority of the City of Pittsburghhacp.org
A municipal corporation providing decent, affordable housing for low-income individuals in Pittsburgh through public housing, Section 8 vouchers, and mixed-finance units |
222 |
| 34 |
Maternity Care Coalitionmaternitycarecoalition.org
A nonprofit organization providing support and programs to improve the health and well-being of pregnant women, parenting families, and children ages 0-3 |
209 |
| 35 |
Society of Hospital Medicinehospitalmedicine.org
Promoting exceptional care for hospitalized patients through a medical society of over 15,000 hospitalists specializing in comprehensive medical care |
196 |
| 36 |
World Teamus.worldteam.org
Interdenominational missionary agency with 350+ workers in 28 countries focusing on establishing reproducing churches among unreached people groups worldwide to glorify God |
184 |
| 37 |
Greater Pittsburgh Community Food Bankpittsburghfoodbank.org
Non-profit organization in Pittsburgh area addresses food insecurity through community partnerships, programs, and resources, serving millions annually Join us in making a difference! |
182 |
| 38 |
FAYETTE RESOURCES, INC.fayetteresources.org
A company providing person-centered services to adults and children with disabilities, promoting independence, choice, growth, acceptance, and respect in communities |
180 |
| 39 |
Amizadeamizade.org
A Pittsburgh-based organization offering volunteer programs and service-learning courses in 12 countries, fostering empathy, social action, and community connections |
180 |
| 40 |
Foundation for Individual Rights and Expressionthefire.org
This company advocates for and defends free speech and thought rights of individuals, with a focus on protecting students and faculty on college campuses |
180 |
| 41 |
DSG | Koyadsgco.com
An executive search and strategic advising firm connecting talented individuals with mission-driven clients in various sectors worldwide Services include search, advising, and career support |
177 |
| 42 |
McGuire Memorialmcguirememorial.org
Provider of comprehensive services for individuals with intellectual and physical disabilities, including those with complex medical conditions and on the autism spectrum |
175 |
| 43 |
Universal Charter Schoolsuniversalfamilyofschools.org
The company creates opportunities in disenfranchised communities by addressing systemic barriers to wealth creation through education, culture, and entrepreneurship |
174 |
| 44 |
YMCA of Greater Erieymcaerie.org
The YMCA empowers communities through youth development, healthy living, and social responsibility, fostering a caring, respectful, and supportive environment for all |
173 |
| 45 |
Felician Sisters of North Americafelician.org
A nonprofit organization led by Felician Sisters providing care and support to vowed women religious across multiple continents |
173 |
| 46 |
Girl Scouts of Eastern Pennsylvaniagsep.org
Empowering girls to make a difference through the Girl Scout experience with support from volunteers and community partners in Eastern Pennsylvania |
171 |
| 47 |
Travis Manion Foundationtravismanion.org
Empowering veterans and families of fallen heroes to develop character in future generations through service, community engagement, and post-military support |
169 |
| 48 |
MANNA (Metropolitan Area Neighborhood Nutrition Alliance)mannapa.org
This company prepares and delivers nutritious meals to individuals facing life-threatening illnesses, offering support to improve health and quality of life |
166 |
| 49 |
The Chamber of Commerce for Greater Philadelphiachamberphl.com
The organization brings together businesses and civic leaders to promote growth, create opportunities, advocate for regional development, and support members in Greater Philadelphia |
164 |
| 50 |
Garden Spot Villagegardenspotvillage.org
Non-profit retirement community enriching older adults' lives with Christ's love, serving residents, community, and global 50-plus population in innovative ways |
163 |
| 51 |
Strawberry Fields Inc.sfionline.org
A non-profit agency providing support services to individuals with disabilities, including adults, children, and infants |
163 |
| 52 |
MANY
A national network providing resources and training to improve outcomes for at-risk youth, focusing on employment, education, homelessness, mentoring, sex trafficking, and parental engagement |
159 |
| 53 |
Mainstay Life Servicesmainstaylifeservices.org
Nonprofit organization providing residential services and supports to individuals with developmental disabilities, emphasizing respect, compassion, and individualized care within communities |
156 |
| 54 | 156 | |
| 55 |
AIST - Association for Iron & Steel Technologyaist.org
An international technical association dedicated to advancing the development, production, and application of iron and steel through professional and student membership |
156 |
| 56 |
Achievement Center of LECOM Healthachievementctr.org
A leading provider of therapeutic services for children and young adults, helping them maximize their potential in various areas of development |
152 |
| 57 |
A Step Up Academyastepupacademy.org
A Step Up Academy is a not-for-profit school offering innovative academic and behavioral programming for children with Autism Spectrum Disorder up to 8th grade |
152 |
| 58 |
Liberty Lutheranlibertylutheran.org
Non-profit organization supporting older adults and vulnerable individuals with healthcare, housing, wellness services, bereavement support, disaster recovery, and community programs |
152 |
| 59 |
Heights Philadelphiaheights.org
Heights connects Philadelphia youth to careers and college, providing academic, workforce, and college support to propel economic mobility |
151 |
| 60 |
JFCS Pittsburghjfcspgh.org
The company provides social services to individuals and families, empowering them with resources for self-sufficiency and stability through life's changes and challenges |
150 |
| 61 |
CommunityAidcommunityaid.org
A nonprofit organization operating thrift stores in Pennsylvania, creating jobs, supporting local nonprofits, and assisting neighbors in need through donations |
148 |
| 62 |
PathWays of Southwestern Pennsylvaniayourpathways.org
This company focuses on creating opportunities for career fulfillment through attracting top talent, offering professional development, and supporting employee engagement |
112 |
| 63 |
Central Susquehanna Opportunities, Inc.csocares.org
This nonprofit organization fosters connections and collaborations to create positive, sustainable changes that enhance quality of life for all |
68 |
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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.
More company lists in Pennsylvania
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- Financial Services companies in Pennsylvania 138
- IT Services and IT Consulting companies in Pennsylvania 134
- SaaS companies in Pennsylvania 104
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- Family-owned companies in Pennsylvania 73
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- Publicly traded companies in Pennsylvania 64
The same list elsewhere in United States
- Non-profit Organizations companies in the United States 1,966
- Non-profit Organizations companies in New York State 299
- Non-profit Organizations companies in California 249
- Non-profit Organizations companies in Texas 108
- Non-profit Organizations companies in Illinois 106
- Non-profit Organizations companies in Virginia 101
- Non-profit Organizations companies in Massachusetts 77
- Non-profit Organizations companies in Florida 74
- Non-profit Organizations companies in Indiana 57
- Non-profit Organizations companies in Colorado 50
- Non-profit Organizations companies in Maryland 48
- Non-profit Organizations companies in Michigan 43
- Non-profit Organizations companies in Georgia 42
- Non-profit Organizations companies in Washington State 41
- Non-profit Organizations companies in New Jersey 37
- Non-profit Organizations companies in North Carolina 34
- Non-profit Organizations companies in Minnesota 33
- Non-profit Organizations companies in Missouri 33
- Non-profit Organizations companies in New York 199
- Non-profit Organizations companies in Washington 143
- Non-profit Organizations companies in Chicago 65
- Non-profit Organizations companies in Los Angeles 41
- Non-profit Organizations companies in San Francisco 38
- Non-profit Organizations companies in Boston 36