The 100 largest Non-profit Organizations companies in London (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	British Council britishcouncil.org Building global connections through arts, education, English language learning, and qualifications to empower individuals and foster international understanding.	Non-profit Organizations	🇬🇧 London	24,510	1934
2	World Vision wvi.org A global humanitarian organization dedicated to improving the lives of children and families by addressing root causes of poverty worldwide	Non-profit Organizations	🇬🇧 London	19,419	1950
3	Transport for London tfl.gov.uk London-based transportation company leading in providing diverse travel options, focusing on customer feedback, technology innovation, and large-scale investments for city-wide mobility improvements	Non-profit Organizations	🇬🇧 London	18,658	2000
4	Save the Children International savethechildren.net Support children's survival, protection, development, and participation worldwide through programs, campaigns, and partnerships in 120 countries.	Non-profit Organizations	🇬🇧 London	17,356	1919
5	British Heart Foundation bhf.org.uk Funding and supporting cardiovascular research to develop treatments, improve healthcare, and prevent heart disease for longer, healthier lives.	Non-profit Organizations	🇬🇧 London	7,494	1961
6	Citizens Advice citizensadvice.org.uk Charity providing advice and support to individuals from all backgrounds, addressing a wide range of personal and social problems.	Non-profit Organizations	🇬🇧 London	5,832	1939
7	Cancer Research UK (CRUK)cancerresearchuk.org Dedicated to cancer research, prevention, diagnosis, and treatment, funded by public donations to improve survival and quality of life.	Non-profit Organizations	🇬🇧 London	5,433	n/a
8	Save the Children UK jobs.savethechildren.org.uk Global organization dedicated to helping children worldwide reach their full potential by providing safety, health, education, and advocacy for their rights	Non-profit Organizations	🇬🇧 London	4,602	1919
9	Age UK ageuk.org.uk Provide companionship, advice, and support to millions of older adults, advocating for their interests and enhancing later life quality.	Non-profit Organizations	🇬🇧 London	3,863	2009
10	Amnesty International amnesty.org Global movement exposing abuses, lobbying governments and companies, mobilizing supporters, defending activists, and providing education to claim human rights.	Non-profit Organizations	🇬🇧 London	3,845	n/a
11	The Salvation Army UK and Ireland Territory salvationarmy.org.uk An organization dedicated to saving souls, growing saints, and serving suffering humanity in the United Kingdom and Republic of Ireland	Non-profit Organizations	🇬🇧 London	3,670	1865
12	SEO London seo-london.org The charity provides educational, training, and mentoring support to young people from underrepresented backgrounds, focusing on pre-professional development, career access, and long-term success	Non-profit Organizations	🇬🇧 London	2,947	2000
13	Turning Point turning-point.co.uk A social enterprise that provides health and social care services to empower individuals in making positive life choices and improving their wellbeing	Non-profit Organizations	🇬🇧 London	2,829	1964
14	Sue Ryder sueryder.org providing personalized support and care for people approaching end of life or living with grief, ensuring no one faces it alone	Non-profit Organizations	🇬🇧 London	2,525	1953
15	Marie Curie UK mariecurie.org.uk Providing hospice care, support services, research, and campaigns for terminal illness patients and their families across the UK.	Non-profit Organizations	🇬🇧 London	2,388	1948
16	The Sutton Trust suttontrust.com Dedicated to enhancing social mobility through education, the organization funds programs, conducts research, and advocates for policy changes	Non-profit Organizations	🇬🇧 London	2,341	1997
17	Peabody peabody.org.uk A not-for-profit housing association helping individuals thrive at home, work, and in communities through affordable housing and support services	Non-profit Organizations	🇬🇧 London	2,323	1862
18	Alzheimer's Society alzheimers.org.uk Provide support and assistance to people living with dementia, offering help today and hope for a future without devastation.	Non-profit Organizations	🇬🇧 London	2,290	1979
19	One Young World oneyoungworld.com One Young World unites young leaders from around the world to tackle pressing issues, offering a platform for change and innovation	Non-profit Organizations	🇬🇧 London	2,195	2009
20	General Medical Council gmc-uk.org This company in the UK sets and maintains standards for doctors, investigates concerns, and takes action to ensure public confidence in the medical profession	Non-profit Organizations	🇬🇧 London	2,160	1858
21	The King's Trust kingstrust.org.uk A youth charity founded by His Majesty The King in 1976, offering support to young people aged 11-30 in developing skills for success	Non-profit Organizations	🇬🇧 London	2,147	1976
22	Shaw Trust shawtrust.org.uk A social purpose organization focused on challenging inequality, providing employment opportunities, and supporting social mobility through various services and support	Non-profit Organizations	🇬🇧 London	2,124	1982
23	Macmillan Cancer Support macmillan.org.uk Providing comprehensive support for individuals with cancer, covering emotional, physical, and financial needs with unwavering dedication and care	Non-profit Organizations	🇬🇧 London	2,122	1911
24	Scope scope.org.uk A disability equality charity providing support to disabled individuals and their families, advocating for equality and fairness in society	Non-profit Organizations	🇬🇧 London	2,119	1952
25	NSPCC nspcc.org.uk The organization is dedicated to combating child abuse in the UK and Channel Islands, supporting victims, protecting at-risk children, and preventing future abuse	Non-profit Organizations	🇬🇧 London	2,118	1884
26	Unison unison.org.uk This organization is the UK's largest union, providing support, benefits, and services to over 13 million members across various sectors	Non-profit Organizations	🇬🇧 London	2,078	1993
27	Marie Stopes International msichoices.org A company providing reproductive health services, formerly known as MSI Reproductive Choices	Non-profit Organizations	🇬🇧 London	2,022	1976
28	The RSA (The royal society for arts, manufactures and commerce)thersa.org Uniting people and ideas in collective action to create opportunities for regenerating the world through arts, manufactures, and commerce.	Non-profit Organizations	🇬🇧 London	1,912	n/a
29	Royal British Legion britishlegion.org.uk The company is the UK's largest Armed Forces charity, providing support, advocacy, and services to military personnel, veterans, and their families	Non-profit Organizations	🇬🇧 London	1,813	1921
30	Leonard Cheshire leonardcheshire.org Empowering individuals with disabilities to live, learn, and work independently, creating a more inclusive society through research and innovation	Non-profit Organizations	🇬🇧 London	1,791	1948
31	VSO vsointernational.org Leading global organization leveraging volunteers to drive sustainable international development and create lasting impact on communities worldwide	Non-profit Organizations	🇬🇧 London	1,643	1958
32	Royal Society of Chemistry rsc.org This company advances excellence in chemical sciences, supports over 50,000 members, and is a renowned publisher of high-quality chemical science knowledge	Non-profit Organizations	🇬🇧 London	1,618	1841
33	Sense sense.org.uk Empowering those with complex disabilities, including those who are deafblind, to communicate, experience the world, and reach their full potential through personalized support and advocacy	Non-profit Organizations	🇬🇧 London	1,488	1955
34	Dogs Trust dogstrust.org.uk Charity focused on dog welfare, promoting lifelong commitment to dogs, and supporting dog care and protection across the UK.	Non-profit Organizations	🇬🇧 London	1,474	1891
35	Wellcome Trust wellcome.org Global charitable foundation supporting discovery research in life, health, and wellbeing, addressing mental health, climate, and infectious diseases.	Non-profit Organizations	🇬🇧 London	1,468	1936
36	The Social Mobility Foundation socialmobility.org.uk Opens opportunities for young people with fewer options through professional development programmes and campaigns for systemic change to break down social barriers.	Non-profit Organizations	🇬🇧 London	1,408	2006
37	WaterAid wateraid.org An international not-for-profit focused on providing clean water, toilets, and hygiene to everyone to break the cycle of poverty	Non-profit Organizations	🇬🇧 London	1,392	1981
38	Shelter shelter.org.uk Providing free advice, campaigning for change, and developing solutions to address homelessness and housing issues to create safe and affordable homes for everyone	Non-profit Organizations	🇬🇧 London	1,376	1966
39	RNIB rnib.org.uk A leading UK sight loss charity providing support, services, and products for blind and partially sighted individuals, advocating for accessibility and societal change	Non-profit Organizations	🇬🇧 London	1,336	1868
40	Girlguiding girlguiding.org.uk Empowering girls through leadership and skill-building activities, with a focus on creating a supportive community for young women's personal growth	Non-profit Organizations	🇬🇧 London	1,303	n/a
41	The Honourable Society of Lincoln's Inn lincolnsinn.org.uk An historic society for lawyers in central London, offering services to members such as a law library, education, accommodation, and event hosting	Non-profit Organizations	🇬🇧 London	1,288	1422
42	GMB gmb.org.uk A trade union with 620,000 members advocating for fair pay, safe working conditions, work/life balance, and legal rights for workers	Non-profit Organizations	🇬🇧 London	1,278	1889
43	Local Council gov.uk Locate and connect with local authorities across England, Wales, Scotland, and Northern Ireland for accessible information and services	Non-profit Organizations	🇬🇧 London	1,275	n/a
44	Notting Hill Genesis group.nhg.org.uk Not-for-profit organisation providing quality, below-market rent homes, developing new properties, supporting 130,000 residents across London communities.	Non-profit Organizations	🇬🇧 London	1,268	2018
45	St Mungo's mungos.org A charity in England helping people end homelessness through direct services, policy influence, and support in finding housing and employment	Non-profit Organizations	🇬🇧 London	1,247	1969
46	Catch22 catch-22.org.uk A social business with a not for profit model, providing services that build resilience and aspiration in individuals and communities	Non-profit Organizations	🇬🇧 London	1,146	1788
47	Zoological Society of London (ZSL)zsl.org Science-driven conservation organisation restoring wildlife, protecting species, restoring ecosystems, collaborating globally, inspiring support, and creating sustainable solutions.	Non-profit Organizations	🇬🇧 London	1,135	1826
48	Theirworld theirworld.org A global children's charity dedicated to ending the education crisis, providing a safe learning environment, and developing skills for the future	Non-profit Organizations	🇬🇧 London	1,020	2002
49	Metropolitan Thames Valley mtvh.co.uk A leading UK housing association dedicated to providing affordable homes, care services, and community regeneration to create thriving communities	Non-profit Organizations	🇬🇧 London	1,009	1959
50	Institute of Directors (IoD)iod.com Provides professional development, networking, and expert advice for business leaders, advocating their views in policy and legislation to foster prosperity and improve governance.	Non-profit Organizations	🇬🇧 London	995	1903
51	Rethink Mental Illness rethink.org A charity supporting millions affected by mental illness, providing crisis intervention, independent living support, and fostering a sense of community	Non-profit Organizations	🇬🇧 London	988	1972
52	Which?which.co.uk A UK-based organization focused on protecting consumers, providing impartial research, expert advice, product reviews, and advocating for consumer rights	Non-profit Organizations	🇬🇧 London	976	1957
53	The Children's Society childrenssociety.org.uk This company is dedicated to fighting abuse and neglect to ensure every young person has a good childhood and promising future	Non-profit Organizations	🇬🇧 London	959	1881
54	Restless Development restlessdevelopment.org A youth-led development agency empowering young people to drive change and address persistent global issues, reaching millions through various programs	Non-profit Organizations	🇬🇧 London	948	1985
55	Royal Aeronautical Society aerosociety.com Dedicated professional body for the entire aerospace community, established 1866. Furthers art, science, and engineering of aeronautics. Membership open to anyone in or interested in the sector.	Non-profit Organizations	🇬🇧 London	941	1866
56	The Honourable Society of the Middle Temple middletemple.org.uk Exclusive legal training institution providing education, support, property management, and professional community services for barristers and law students.	Non-profit Organizations	🇬🇧 London	910	1608
57	Nacro nacro.org.uk Supporting individuals through housing, justice, substance misuse, and education services, amplifying their voices and advocating for lasting change	Non-profit Organizations	🇬🇧 London	897	1966
58	A2Dominion Group a2dominiongroup.co.uk Provision of social, affordable, supported, and market sale homes with community projects enhancing health, wellbeing, and financial stability.	Non-profit Organizations	🇬🇧 London	879	2008
59	Anchor Trust anchor.org.uk A leading not-for-profit provider of housing, care, and support services for older people, with a strong reputation and social purpose	Non-profit Organizations	🇬🇧 London	876	n/a
60	CBI (Confederation of British Industry)cbi.org.uk Voice for British businesses across all sectors and regions, facilitating collaboration between industry leaders and government officials to promote sustainable economic growth.	Non-profit Organizations	🇬🇧 London	827	n/a
61	SSAFA the Armed Forces charity ssafa.org.uk Providing lifelong support to the Armed Forces community by offering practical, emotional, and financial assistance to current and former members and their families	Non-profit Organizations	🇬🇧 London	819	1885
62	Crisis crisis.org.uk National charity committed to ending homelessness by providing support, research, and advocacy to help homeless individuals rebuild their lives and find permanent solutions	Non-profit Organizations	🇬🇧 London	804	n/a
63	Royal Academy of Engineering raeng.org.uk Community of experts and innovators focused on engineering solutions to improve quality of life and create better living conditions.	Non-profit Organizations	🇬🇧 London	792	n/a
64	Stroke Association stroke.org.uk A UK charity providing specialist support, research, and campaigning to rebuild lives after stroke, helping survivors adapt and thrive	Non-profit Organizations	🇬🇧 London	791	n/a
65	Place2Be place2be.org.uk A children's mental health charity with 27 years of experience providing support to pupils, families, and school staff, including organizing Children's Mental Health Week	Non-profit Organizations	🇬🇧 London	787	1994
66	Parkinson's UK parkinsons.org.uk This organization funds research, operates a brain bank, and campaigns for Parkinson's awareness and policy change to find a cure	Non-profit Organizations	🇬🇧 London	765	1969
67	The National Lottery Community Fund tnlcommunityfund.org.uk Distributor of National Lottery funding supporting community-led projects for resilient, inclusive, and sustainable communities across the UK	Non-profit Organizations	🇬🇧 London	740	n/a
68	Climate AI msdevs.org A UK-based platform for Android developers and startups to learn, network, and improve their skills through professional development and technical talks	Non-profit Organizations	🇬🇧 London	738	n/a
69	WithYou wearewithyou.org.uk A UK-based charity providing support for drug, alcohol, and mental health issues through therapy, counseling, rehab, and online services	Non-profit Organizations	🇬🇧 London	716	1967
70	St Giles stgilestrust.org.uk Empowering individuals facing adversity with peer-based support and services to overcome challenges related to poverty, exploitation, abuse, mental health, and crime	Non-profit Organizations	🇬🇧 London	700	1962
71	Internews internews.org Support independent journalism globally, strengthen media professionals, amplify marginalized voices, and foster sustainable, quality local information environments.	Non-profit Organizations	🇬🇧 London	695	1982
72	Centrepoint centrepoint.org.uk Dedicated to ending youth homelessness, striving to make a difference for young people facing housing insecurity every four minutes	Non-profit Organizations	🇬🇧 London	691	1969
73	Hestia Charity hestia.org This company provides specialist support to individuals experiencing domestic abuse, modern slavery, and mental health crises in London and surrounding areas	Non-profit Organizations	🇬🇧 London	669	n/a
74	Friends of the Earth friendsoftheearth.uk The company is the UK's largest grassroots environmental organization dedicated to creating positive change for the planet 🌍🌱	Non-profit Organizations	🇬🇧 London	669	1970
75	Diabetes UK diabetes.org.uk Leading the fight against diabetes, the fastest growing health crisis, in order to create a world without harm from the disease	Non-profit Organizations	🇬🇧 London	657	1934
76	Family Action family-action.org.uk A long-standing family charity providing support to individuals during times of change, challenge, or crisis, transforming lives for over 150 years	Non-profit Organizations	🇬🇧 London	649	1869
77	Look Ahead Care and Support lookahead.org.uk A leading provider of specialist care, support, and housing services in London and the South East, serving over 7000 individuals with various needs	Non-profit Organizations	🇬🇧 London	643	1973
78	Opportunities for Youth opportunitiesforyouth.org An online portal providing information on study opportunities, scholarships, grants, training, conferences, and job/internship listings for ambitious youth globally	Non-profit Organizations	🇬🇧 London	619	2010
79	Frontline thefrontline.org.uk England’s largest social work charity recruiting and teaching new social workers, developing leadership skills, inspiring innovation, and advocating for children and families	Non-profit Organizations	🇬🇧 London	611	2013
80	Police Now policenow.org.uk This organization aims to enhance communities and lower crime rates by recruiting and mentoring exceptional individuals to lead in law enforcement	Non-profit Organizations	🇬🇧 London	589	n/a
81	Breast Cancer Now breastcancernow.org Providing support and resources for individuals affected by breast cancer, ensuring care and assistance throughout their experience.	Non-profit Organizations	🇬🇧 London	567	n/a
82	Charities Aid Foundation (CAF)cafonline.org A leading charity and bank connecting organizations, individuals, and institutions to ensure everyone has a stake in the future	Non-profit Organizations	🇬🇧 London	566	1924
83	Anthony Nolan anthonynolan.org A non-profit organization connecting donors with blood cancer patients in need of lifesaving stem cell transplants Join the register online to help save lives	Non-profit Organizations	🇬🇧 London	564	1974
84	The Royal Society royalsociety.org Influencing science policy, funding researchers, publishing journals, and providing science communication activities for various public audiences. Focuses on empirical evidence and discovery.	Non-profit Organizations	🇬🇧 London	559	n/a
85	The Royal Household royal.uk Provide diverse professional support to the Royal Family, maintaining traditions while fostering innovation in historic, prestigious surroundings.	Non-profit Organizations	🇬🇧 London	549	n/a
86	The Forward Trust forwardtrust.org.uk A social enterprise empowering individuals to overcome crime and addiction, helping them build positive, productive lives through various services and support	Non-profit Organizations	🇬🇧 London	547	1991
87	CAFOD cafod.org.uk A Catholic aid agency partnering worldwide to bring hope, compassion, and solidarity to communities in need and working towards ending poverty and injustice	Non-profit Organizations	🇬🇧 London	541	1962
88	Nesta nesta.org.uk A UK charity focused on innovating solutions for social issues, changing lives for the better through design, testing, and scaling	Non-profit Organizations	🇬🇧 London	539	1998
89	Refuge refuge.org.uk A leading provider of specialist services for survivors of domestic violence, offering support, shelter, legal guidance, and social change campaigns	Non-profit Organizations	🇬🇧 London	533	n/a
90	10,000 Black Interns 10000internsfoundation.com This company offers paid internships to Black students and graduates in various UK industries through the 10,000 Black Interns programme	Non-profit Organizations	🇬🇧 London	532	2020
91	Via viaorg.uk An innovative charity providing support for individuals affected by drug and alcohol use, offering a wide range of services for recovery and social integration	Non-profit Organizations	🇬🇧 London	527	1990
92	MSI Reproductive Choices msichoices.org A global leader in reproductive healthcare services Formerly known as Marie Stopes International	Non-profit Organizations	🇬🇧 London	527	n/a
93	C40 Cities c40.org Network of nearly 100 city mayors collaborating on science-based, people-focused climate actions to limit global heating and build resilient communities.	Non-profit Organizations	🇬🇧 London	526	2005
94	Certitude certitude.org.uk A leading London adult social care provider for individuals with learning disabilities, autism, and mental health support needs, and their families	Non-profit Organizations	🇬🇧 London	513	1990
95	MSSC (Marine Society & Sea Cadets)ms-sc.org Delivers life-changing nautical adventures for young people while providing personal and professional education opportunities for seafarers worldwide to enhance their careers and skills.	Non-profit Organizations	🇬🇧 London	491	n/a
96	UNICEF UK unicef.org.uk An organization working worldwide to support and protect children in need through fundraising, emergency response, development programs, and advocacy efforts	Non-profit Organizations	🇬🇧 London	484	n/a
97	Addaction wearewithyou.org.uk This organization offers free and confidential support for individuals dealing with drugs, alcohol, and mental health challenges	Non-profit Organizations	🇬🇧 London	477	1967
98	Ambitious about Autism ambitiousaboutautism.org.uk A national charity advocating for autistic children and young people's rights, championing change, and creating opportunities for them to realize their ambitions	Non-profit Organizations	🇬🇧 London	477	1997
99	The Honourable Society of the Inner Temple innertemple.org.uk An ancient membership association at the heart of legal education, promoting the rule of law and nurturing a diverse legal community globally	Non-profit Organizations	🇬🇧 London	474	1340
100	The Brokerage thebrokerage.org.uk Helps young people 16-25 access work experiences, employability skills, and jobs, partnering with employers to foster workplace diversity.	Non-profit Organizations	🇬🇧 London	474	1996

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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 9, 2026.

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Non-profit Organizations companies in the United Kingdom 490