Company lists · Data refreshed September 2026

Top 25 Middle office outsourcing providers based in the United Kingdom

RevenueBase identified 98 company matches for middle office outsourcing providers associated with the United Kingdom as of September 2026 and tracks 774 professional contacts across them, including 179 with verified work emails. London is the largest hub.

This list covers company matches for middle office outsourcing providers associated with the United Kingdom, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 28, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 28, 2026 How this list was built
98Companies
774Contacts tracked
179Verified emails
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The 25 largest middle office outsourcing providers based in the United Kingdom

Ranked by team size
Top 25 of 98 company matches for middle office outsourcing providers based in the United Kingdom, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 28, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20051 contacts →

Exact match

“Investment Software offers IMiX, a front to middle office platform with a multi-client, multi-entity tier system, which combines a range of dynamic tools and services designed to…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-20041 contacts →

Exact match

“Welcome to Factotum-your secret weapon for streamlined business success!”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
3Exact matchBorehamwood, United KingdomHQ recorded Sep 28, 2026201-50025 contacts →

Exact match

“Businesses today are under more pressure than ever before to reduce risk, drive efficiency and create consistency.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
4Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5024 contacts →

Exact match

“Oakford Advisors Ltd, a Centralis Group company, is an outsourced business services firm which specialises in providing back-office support to start-up or existing companies…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
5Exact matchPreston, United KingdomHQ recorded Sep 28, 202611-5022 contacts →

Exact match

“Top Resource Group is your one-stop ally for all business outsourcing needs.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
6Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5020 contacts →

Exact match

“At MEG Analytics, we’re using today’s technology to help build and grow your financial services business.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
7Exact matchLondon, United KingdomHQ recorded Sep 28, 2026n/a18 contacts →

Exact match

“FNZ Securities offers Back and Middle Office services, including the protection of Client Assets and Client Money and state of the art front office software to the wealth…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
8Exact matchSelby, United KingdomHQ recorded Sep 28, 202611-5015 contacts →

Exact match

“Here at Backoffice we offer a choice of services designed to meet both the agency and operative’s needs.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
9Exact matchWest Wickham, United KingdomHQ recorded Sep 28, 202611-5015 contacts →

Exact match

“When you engage us to act as your outsourced finance team, we not only provide financial and business support, but in conjunction with our wider community of legal experts and tax…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
10Exact matchHinckley, United KingdomHQ recorded Sep 28, 20261-1013 contacts →

Exact match

“Adviser Outsourcing provide bespoke outsourced and consultancy services to Financial advice firms that provide reliability, flexibility and above all else expertise within the…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-5012 contacts →

Exact match

“We bring our extensive industry experience to the hum-drum of finance, HR, operations, marketing and compliance so that you can focus on delivering the fun to your customers.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
12Exact matchCrawley, United KingdomHQ recorded Sep 28, 202611-508 contacts →

Exact match

“Efficiency Back Office Services (Pty) Ltd started in 2022 and is an outsourcing back-office administration company that specialises in providing skilled and fully managed…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
13Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-507 contacts →

Exact match

“BrokerHub is an IT service provider with headquarters in London and regional offices in Hong Kong and Manila.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
14Exact matchHitchin, United KingdomHQ recorded Sep 28, 20261-106 contacts →

Exact match

“The slicker, swifter, smarter back office solution for recruitment companies - start-ups or existing agencies - we can help.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Sep 28, 202611-506 contacts →

Exact match

“CAPITALAB provides innovative solutions to users of OTC Derivatives (investment banks, hedge funds and other financial institutions.) CAPITALAB focuses on optimising portfolios…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
16Exact matchNewmarket, United KingdomHQ recorded Sep 28, 20261-105 contacts →

Exact match

“AccountAbility-Plus can help you grow your business.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
17Exact matchSouth Yorkshire, United KingdomHQ recorded Sep 28, 202611-504 contacts →

Exact match

“We are not your typical finance and accounting / legal process outsourcing service provider.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
18Exact matchDoncaster, United KingdomHQ recorded Sep 28, 20261-104 contacts →

Exact match

“MoreThan BackOffice Ltd is a leading outsourcing company specialising in providing comprehensive administrative and operational solutions for individual IFAs, Financial Advisory…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
19Exact matchBristol, United KingdomHQ recorded Sep 28, 20261-104 contacts →

Exact match

“We’re a fractional finance team for founder‑led tech and med tech businesses.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
20Exact matchStamford, United KingdomHQ recorded Sep 28, 202611-503 contacts →

Exact match

“Comprehensive, bespoke, and innovative fixed fee support for financial advisers, planners, and mortgage brokers to facilitate your freedom through integrated client servicing…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
21Exact matchLondon, United KingdomHQ recorded Sep 28, 202651-2003 contacts →

Exact match

“OSREC is a London based provider of financial consuting and outsourcing services.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
22Exact matchManchester, United KingdomHQ recorded Sep 28, 202651-2003 contacts →

Exact match

“When you’re running a business, you want to be able to focus on the things that really matter; winning new customers, providing them with a first-class service or perhaps planning…”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
23Exact matchEdgware, United KingdomHQ recorded Sep 28, 202611-503 contacts →

Exact match

“Who are we?”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
24Exact matchLondon, United KingdomHQ recorded Sep 28, 20261-103 contacts →

Exact match

“Specialist Back and Middle Office Recruitment Solutions for Real Estate Investment Firms.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase
25Exact matchSouthport, United KingdomHQ recorded Sep 28, 202611-502 contacts →

Exact match

“XP Processing Ltd is a white labelled outsourcing specialist, working in the financial services sector, based in Southport, Merseyside, United Kingdom.”

Recorded in the RevenueBase company graph · Sep 28, 2026 · View company records in RevenueBase

Showing 25 of 98 middle office outsourcing providers based in the United Kingdom

See the full list, filter by size, metro and specialty, and access 179 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Middle office outsourcing providers based in the United Kingdom at a glance

As of Sep 28, 2026
23.1%Verified-email coverage
7.9Average contacts per company
1-10Median size (employees)
38.8%Largest-city concentration · London
Sep 28, 2026Page data refreshed

Companies by employee count

1-10
49
11-50
36
51-200
8
201-500
2
501-1,000
1
1,001-5,000
1
5,001-10,000
1

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 98 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source
The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies
Company records associated with the United Kingdom whose business descriptions match “middle office outsourcing providers” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch
Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview
The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality
RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 179 professional contacts with verified work emails across the full matched dataset. 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 28, 2026. Lists refresh periodically as the graph is re-checked.
Record context
Company records and descriptions can change. Check the company's website for its current services and locations.

Middle office outsourcing providers by metro

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “middle office outsourcing providers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many middle office outsourcing providers are there based in the United Kingdom?

RevenueBase identified 98 company matches for middle office outsourcing providers associated with the United Kingdom as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Investment Software Group tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most middle office outsourcing providers?

London leads with 38 company records, followed by Birmingham (3) and Doncaster (2).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 179 professional contacts with verified work emails tracked across these 98 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 28, 2026.

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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 SmartSearch, 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.