Company lists · Data refreshed September 2026

Top 25 Financial strategy consulting firms based in London, United Kingdom

Name: Financial strategy consulting firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 608 companies tracked

RevenueBase identified 608 financial strategy consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 20,949 professional contacts across them, including 9,945 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers financial strategy consulting firms headquartered in London, 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 30, 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 30, 2026 86% judged on-target in blind review

608Companies

20,949Contacts tracked

9,945Verified emails

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The 25 largest financial strategy consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 608 financial strategy consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to financial strategy consulting firms: 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	Ey-Parthenon	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	10001+	17,070 contacts →
	Partial evidence “Our unique combination of transformative strategy, transactions and corporate finance delivers real-world value – solutions that work in practice, not just on paper.” Source: RevenueBase Database · checked Sep 30, 2026
2	Chase DE Vere	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	201-500	589 contacts →
	Indirect evidence “At Chase de Vere, we believe the only worthwhile advice is independent advice.” Source: RevenueBase Database · checked Sep 30, 2026
3	Mercer UK	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	10001+	329 contacts →
	Indirect evidence “At Mercer, A Marsh business, we’re helping our clients realize their investment objectives, shape the future of work, and enhance health and retirement outcomes for their people.” Source: RevenueBase Database · checked Sep 30, 2026
4	True North Partners	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	185 contacts →
	Partial evidence “True North Partners LLP is an independent consulting firm based in London, Johannesburg, Frankfurt, Amsterdam and Madrid.” Source: RevenueBase Database · checked Sep 30, 2026
5	Clearwater Wealth Management	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	201-500	135 contacts →
	Partial evidence “Clearwater Wealth Management, established in 2005, is a leading London based financial advisory firm and a proud Principal Partner Practice of St.” Source: RevenueBase Database · checked Sep 30, 2026
6	Athens	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	122 contacts →
	Indirect evidence “Athens helps clients make superior investment decisions and supports them to deliver value from these decisions through timely implementation.” Source: RevenueBase Database · checked Sep 30, 2026
7	Hfmc Wealth	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	100 contacts →
	Partial evidence “HFMC Wealth is a UK independent financial adviser specialising in high‑net‑worth clients (£1m–£5m), recognised in the FT Adviser Top 20 and Citywire Top 100.” Source: RevenueBase Database · checked Sep 30, 2026
8	Fenchurch Advisory Partners	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	98 contacts →
	Indirect evidence “Fenchurch Advisory Partners is one of the leading independent corporate finance advisory firms in London.” Source: RevenueBase Database · checked Sep 30, 2026
9	Valentia Partners	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	94 contacts →
	Partial evidence “Valentia Partners is a specialist Management Consulting firm.” Source: RevenueBase Database · checked Sep 30, 2026
10	PMC Treasury	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	51-200	92 contacts →
	Indirect evidence “An independent specialist treasury and risk management consultancy offering expert advice and practical support to corporates, private equity and infrastructure funds globally.” Source: RevenueBase Database · checked Sep 30, 2026
11	Continuum Advisory Partners	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	43 contacts →
	Partial evidence “Continuum Advisory Partners is a London-based Corporate Finance Advisory firm serving entrepreneurial, private equity, corporate and institutional clients across the Financial…” Source: RevenueBase Database · checked Sep 30, 2026
12	Platform01 Consulting Group	Strong evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	32 contacts →
	Strong evidence “Platform01 Consulting is a Strategy and Advisory firm offering bespoke consulting services to visionary leaders and investors worldwide.” Source: RevenueBase Database · checked Sep 30, 2026
13	First Wealth Certified B Corp	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	30 contacts →
	Partial evidence “Our award-winning lifestyle financial planning approach helps our clients identify, achieve, and protect what matters most to them, without the fear of running out of money.” Source: RevenueBase Database · checked Sep 30, 2026
14	Smith Square Partners	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	27 contacts →
	Partial evidence “Smith Square Partners provides high quality financial advice to entrepreneurs, boards, shareholders, management teams and non-executive directors of companies on acquisitions and…” Source: RevenueBase Database · checked Sep 30, 2026
15	Humboldt Financial	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	26 contacts →
	Partial evidence “Humboldt Financial is a financial planning firm located in London, United Kingdom.” Source: RevenueBase Database · checked Sep 30, 2026
16	Thomson Tyndall	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	25 contacts →
	Indirect evidence “Our clients tell us that truly independent advice is important to them, a view we have always shared.” Source: RevenueBase Database · checked Sep 30, 2026
17	Hines Associates LTD	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	25 contacts →
	Indirect evidence “Hines Associates is an independent corporate finance advisory firm based in the City of London.” Source: RevenueBase Database · checked Sep 30, 2026
18	Trinity Lifetime Partners LTD	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	22 contacts →
	Partial evidence “At Trinity Lifetime Partners we aim to inspire new thinking in order to provide our clients with the insights and information they need to make the right financial decisions.” Source: RevenueBase Database · checked Sep 30, 2026
19	ONE Financial Planning LTD	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	20 contacts →
	Partial evidence “One Financial offers a discreet and sophisticated financial planning service with a longstanding reputation for professional advice and exceptional levels of customer service.” Source: RevenueBase Database · checked Sep 30, 2026
20	Robey Warshaw	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	19 contacts →
	Partial evidence “Robey Warshaw provides clients with corporate finance advice, including assistance with strategic matters and corporate transactions.” Source: RevenueBase Database · checked Sep 30, 2026
21	Linley Black	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	19 contacts →
	Partial evidence “Our Financial Planning helps you get the most from your wealth and your life.” Source: RevenueBase Database · checked Sep 30, 2026
22	Spencer House Partners LLP	Indirect evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	18 contacts →
	Indirect evidence “Spencer House Partners LLP was established in London in 2005.” Source: RevenueBase Database · checked Sep 30, 2026
23	K3 Advantage	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	18 contacts →
	Partial evidence “K3 Advantage is a trusted advisor focusing on Transactions, Tax Advisory and Strategy.” Source: RevenueBase Database · checked Sep 30, 2026
24	Financial Performance Engineers	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	18 contacts →
	Partial evidence “FINPE delivers bottom-line financial results to financial services providers.” Source: RevenueBase Database · checked Sep 30, 2026
25	Niche Private Clients	Partial evidence	London, United KingdomHQ checked Sep 30, 2026	11-50	18 contacts →
	Partial evidence “Specialist, fixed fee financial planning tailored to high net worth individuals and families, Niche Private Clients offers experience and expertise to assist you in making long…” Source: RevenueBase Database · checked Sep 30, 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: financial strategy consulting firms. 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 financial strategy consulting firms.
Partial evidence: Its own public description names part of financial strategy consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name financial strategy consulting firms. 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 608 financial strategy consulting firms based in London, United Kingdom

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Financial strategy consulting firms based in London, United Kingdom at a glance

As of Sep 30, 2026

47.5%Verified-email coverage

34.5Average contacts per company

1-10Median size (employees)

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

476

11-50

51-200

201-500

1,001-5,000

10001+

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 608 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 financial strategy consulting firms, 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 London, United Kingdom whose own description of what they do matches “financial strategy consulting firms”. 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 financial strategy consulting firms), 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 financial strategy consulting firms, and records with no verified work email. Companies headquartered outside London 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, 9,945 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 30, 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.

Financial strategy consulting firms by metro in the United Kingdom

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 financial strategy consulting firms, 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 financial strategy consulting firms are there based in London, United Kingdom?

RevenueBase identified 608 financial strategy consulting firms headquartered in London, 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?

Ey-Parthenon, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most financial strategy consulting firms?

London leads the United Kingdom with 608 headquartered companies, followed by Manchester (36) and Bristol (27).

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 9,945 verified decision-maker contacts tracked across these 608 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 30, 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 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.