Company lists · Data refreshed September 2026

Top 25 Member-owned banks based in the United Kingdom

Name: Member-owned banks based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 107 companies tracked

RevenueBase identified 107 member-owned banks headquartered in the United Kingdom as of September 2026 and tracks 10,474 professional contacts across them, including 4,226 with verified work emails. London is the largest hub.

This list covers member-owned banks headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 17, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

107Companies

10,474Contacts tracked

4,226Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest member-owned banks based in the United Kingdom

Ranked by team size

Top 25 of 107 member-owned banks based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to member-owned banks: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	The Co-Operative Bank PLC	Indirect evidence	Manchester, United KingdomHQ checked Sep 17, 2026	1,001-5,000	3,138 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
2	Central Co-Op	Indirect evidence	Lichfield, United KingdomHQ checked Sep 17, 2026	5,001-10,000	909 contacts →
	Indirect evidence “We believe in doing things differently.” Source: RevenueBase Database · checked Sep 17, 2026
3	Principality Building Society	Strong evidence	Cardiff, United KingdomHQ checked Sep 17, 2026	1,001-5,000	783 contacts →
	Strong evidence “Principality is a mutual building society, which means that we're owned by and run for the benefit of our Members – our savers and borrowers.” Source: RevenueBase Database · checked Sep 17, 2026
4	East Of England Co-Op	Indirect evidence	Wherstead, United KingdomHQ checked Sep 17, 2026	1,001-5,000	719 contacts →
	Indirect evidence “We got started because we felt there was a better way of doing business; one that would make a difference for its customers and the communities that we live in.” Source: RevenueBase Database · checked Sep 17, 2026
5	Cumberland Building Society	Indirect evidence	Carlisle, United KingdomHQ checked Sep 17, 2026	501-1,000	388 contacts →
	Indirect evidence “The Cumberland aims to provide a kinder banking experience for our people, planet and community.” Source: RevenueBase Database · checked Sep 17, 2026
6	Onefamily	Indirect evidence	Brighton, United KingdomHQ checked Sep 17, 2026	501-1,000	383 contacts →
	Indirect evidence “A leading financial services provider known for its simple and straightforward investment options.” Source: RevenueBase Database · checked Sep 17, 2026
7	Unity Trust Bank	Indirect evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	201-500	250 contacts →
	Indirect evidence “Unity is an award-winning, independent commercial bank that uses banking to improve the lives of UK communities Our purpose is to help create a better society, not simply maximise…” Source: RevenueBase Database · checked Sep 17, 2026
8	Newbury Building Society	Strong evidence	Newbury, United KingdomHQ checked Sep 17, 2026	201-500	138 contacts →
	Strong evidence “Newbury Building Society is an award-winning, member-owned building society, helping people achieve their financial goals.” Source: RevenueBase Database · checked Sep 17, 2026
9	Loughborough Building Society	Indirect evidence	Loughborough, United KingdomHQ checked Sep 17, 2026	51-200	60 contacts →
	Indirect evidence “Founded in 1867, Loughborough Building Society remains true to the ideals of the group of local business men who got together to provide the people of Loughborough and District…” Source: RevenueBase Database · checked Sep 17, 2026
10	Marsden Building Society	Indirect evidence	Nelson, United KingdomHQ checked Sep 17, 2026	51-200	54 contacts →
	Indirect evidence “Welcome to Marsden Building Society.” Source: RevenueBase Database · checked Sep 17, 2026
11	Buckinghamshire Building Society	Partial evidence	Chalfont St Giles, United KingdomHQ checked Sep 17, 2026	11-50	51 contacts →
	Partial evidence “Overview Buckinghamshire Building Society is an award winning, mutually owned independent building society founded over 100 years ago.” Source: RevenueBase Database · checked Sep 17, 2026
12	The Stafford Building Society	Partial evidence	Stafford, United KingdomHQ checked Sep 17, 2026	51-200	51 contacts →
	Partial evidence “We are an independent mutual building society founded in 1877 to provide and support our members to save and own their own homes.” Source: RevenueBase Database · checked Sep 17, 2026
13	Leeds Credit Union	Partial evidence	Leeds, United KingdomHQ checked Sep 17, 2026	11-50	38 contacts →
	Partial evidence “Leeds Credit Union is a financial cooperative with members that provides straightforward, affordable financial services.” Source: RevenueBase Database · checked Sep 17, 2026
14	Plunkett UK	Indirect evidence	Woodstock, United KingdomHQ checked Sep 17, 2026	11-50	34 contacts →
	Indirect evidence “We are a national charity supporting people in rural areas to set up and run successful businesses in community ownership.” Source: RevenueBase Database · checked Sep 17, 2026
15	Earl Shilton Building Society	Indirect evidence	Leicester, United KingdomHQ checked Sep 17, 2026	11-50	28 contacts →
	Indirect evidence “Earl Shilton Building Society is one of the UK's longest established building societies.” Source: RevenueBase Database · checked Sep 17, 2026
16	No1 Copperpot Credit Union	Indirect evidence	Cheadle, United KingdomHQ checked Sep 17, 2026	11-50	28 contacts →
	Indirect evidence “Our Credit Union offers financial products exclusively for the Police Family.” Source: RevenueBase Database · checked Sep 17, 2026
17	MY Community Bank	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	26 contacts →
	Indirect evidence “My Community Bank grew out of a credit union founded in the 1970s called Brent Shrine Credit Union.” Source: RevenueBase Database · checked Sep 17, 2026
18	Clockwise Credit Union	Indirect evidence	Leicester, United KingdomHQ checked Sep 17, 2026	11-50	24 contacts →
	Indirect evidence “We are a fair, responsible and people focused credit union, providing a wide range of ethical financial products and services throughout Leicestershire, Rutland & Northamptonshire.” Source: RevenueBase Database · checked Sep 17, 2026
19	Capital Credit Union	Strong evidence	Edinburgh, United KingdomHQ checked Sep 17, 2026	11-50	24 contacts →
	Strong evidence “Capital Credit Union is a member-owned UK financial co-operative, headquartered in Edinburgh.” Source: RevenueBase Database · checked Sep 17, 2026
20	Wave Community Bank	Indirect evidence	Brighton, United KingdomHQ checked Sep 17, 2026	11-50	22 contacts →
	Indirect evidence “Wave Community Bank is a not for profit savings and loans co-operative, which has been trading since August We aim to provide a high quality, sustainable and easy to access…” Source: RevenueBase Database · checked Sep 17, 2026
21	Enterprise Credit Union	Partial evidence	Liverpool, United KingdomHQ checked Sep 17, 2026	11-50	21 contacts →
	Partial evidence “Enterprise Credit Union is a financial co-operative that exist for the benefits of its members.” Source: RevenueBase Database · checked Sep 17, 2026
22	Greenwich & Bexley Credit Union	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	18 contacts →
	Strong evidence “Greenwich & Bexley Credit Union is a local not for profit financial co-operative, owned by our members and founded on principles of mutual co-operation and trust.” Source: RevenueBase Database · checked Sep 17, 2026
23	Citysave Credit Union LTD	Strong evidence	Birmingham, United KingdomHQ checked Sep 17, 2026	1-10	17 contacts →
	Strong evidence “A Credit union is owned, managed and run by its community members.” Source: RevenueBase Database · checked Sep 17, 2026
24	Cardiff & Vale Credit Union	Indirect evidence	Cardiff, United KingdomHQ checked Sep 17, 2026	11-50	15 contacts →
	Indirect evidence “A financial services co-operative providing savings and loans to local people.” Source: RevenueBase Database · checked Sep 17, 2026
25	London Plus Credit Union	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	13 contacts →
	Indirect evidence “London Plus Credit Union is a not-for-profit financial co-operative serving the London boroughs of Hammersmith & Fulham, Wandsworth, Richmond, Kensington & Chelsea, Westminster or…” Source: RevenueBase Database · checked Sep 17, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: member-owned banks. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names member-owned banks.
Partial evidence: Its own public description names part of member-owned banks, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name member-owned banks. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 107 member-owned banks based in the United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 4,226 reachable decision-makers.

Free signup · no credit card

View the full list →

Member-owned banks based in the United Kingdom at a glance

As of Sep 17, 2026

40.3%Verified-email coverage

97.9Average contacts per company

1-10Median size (employees)

8.4%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 107 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among member-owned banks, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United Kingdom whose own description of what they do matches “member-owned banks”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names member-owned banks), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among member-owned banks, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 4,226 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 17, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names member-owned banks, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many member-owned banks are there based in the United Kingdom?

RevenueBase identified 107 member-owned banks headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

The Co-Operative Bank PLC, headquartered in Manchester Manchester, tops this list with the largest team on record.

Which city has the most member-owned banks?

London leads with 9 headquartered companies, followed by Belfast (4) and Glasgow (4).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 4,226 verified decision-maker contacts tracked across these 107 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 107 member-owned banks based in the United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Member-owned banks by geography

Browse the directory

Browse: Companies home · All United Kingdom lists · All Member-owned banks lists · New lists

About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.