Company lists · Data refreshed September 2026

Top 25 Portfolio optimization consulting firms based in London, United Kingdom

Name: Portfolio optimization 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 29, 2026 95 companies tracked

RevenueBase identified 95 portfolio optimization consulting firms headquartered in London, United Kingdom as of September 2026 and tracks 1,369 professional contacts across them, including 690 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers portfolio optimization 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 29, 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 29, 2026 86% judged on-target in blind review

95Companies

1,369Contacts tracked

690Verified emails

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The 25 largest portfolio optimization consulting firms based in London, United Kingdom

Ranked by team size

Top 25 of 95 portfolio optimization consulting firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to portfolio optimization 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	Mercer UK	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
2	PHI Partners	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	501-1,000	281 contacts →
	Partial evidence “Phi Partners is a capital markets consulting firm specialised in quantitative and technology services.” Source: RevenueBase Database · checked Sep 29, 2026
3	4most	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	270 contacts →
	Indirect evidence “We are 4most: the go-to analytics consultancy for financial institutions who want to make better, data-driven decisions with confidence.” Source: RevenueBase Database · checked Sep 29, 2026
4	Verso Investment Management LLP	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	29 contacts →
	Indirect evidence “Verso Investment Management Service comprises two elements.” Source: RevenueBase Database · checked Sep 29, 2026
5	Inalytics	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	19 contacts →
	Indirect evidence “Investment skill exists, see how your Managers rank against our peer group and how we work with our Clients to help them improve their process.” Source: RevenueBase Database · checked Sep 29, 2026
6	Financial Performance Engineers	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	18 contacts →
	Indirect evidence “FINPE delivers bottom-line financial results to financial services providers.” Source: RevenueBase Database · checked Sep 29, 2026
7	Avida International	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	15 contacts →
	Indirect evidence “Avida International helps asset managers and their institutional clients extract maximum value out of their organisations.” Source: RevenueBase Database · checked Sep 29, 2026
8	Pmcl Consulting	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	12 contacts →
	Partial evidence “PMCL Consulting has a dedicated focus on non-for-profit and public sectors, acknowledging their specific investment needs and understanding the complex dynamics of charity trustee…” Source: RevenueBase Database · checked Sep 29, 2026
9	Econophysica	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	11 contacts →
	Partial evidence “Econophysica Ltd was founded in London on 21 August by Dr Oleg Soloviev to provide consulting services to the financial industry.” Source: RevenueBase Database · checked Sep 29, 2026
10	Fowler Drew	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	8 contacts →
	Partial evidence “Fowler Drew are fully-integrated financial planners and discretionary portfolio managers for individuals and families.” Source: RevenueBase Database · checked Sep 29, 2026
11	Mountstone Partners	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect evidence “With three core principles; Simplicity, Transparency and Security, our specialist team work with you to understand your objectives and aspirations.” Source: RevenueBase Database · checked Sep 29, 2026
12	Frost Research Systems	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	6 contacts →
	Partial evidence “Frost Consulting is a leading authority on global equity commission unbundling and related market structure/regulatory change.” Source: RevenueBase Database · checked Sep 29, 2026
13	Gritseek Ventures	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	5 contacts →
	Partial evidence “Gritseek Ventures is a network of partners and agents that work together to create value for its clients as a Data-Driven Financial Consulting Firm, a Startup Enabler, a Value…” Source: RevenueBase Database · checked Sep 29, 2026
14	Brown Armadillo Limited	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	5 contacts →
	Indirect evidence “Brown Armadillo Limited is a company of financial advisors and consultants with headquarters in Hong Kong, we started operation in 2007.” Source: RevenueBase Database · checked Sep 29, 2026
15	Gebel Group	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	4 contacts →
	Indirect evidence “Gebel is a software company specialised in market_data analysis.” Source: RevenueBase Database · checked Sep 29, 2026
16	Parala Capital LLP	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	4 contacts →
	Indirect evidence “We are an investment advisory firm with $2.3 billion in assets under advisement originating from in-depth collaboration and partnership between experienced industry practitioners…” Source: RevenueBase Database · checked Sep 29, 2026
17	Ginger Black	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	3 contacts →
	Indirect evidence “We are a team of like minded people, that live for data and the thrill of insight.” Source: RevenueBase Database · checked Sep 29, 2026
18	Novantigo	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Partial evidence “At Novantigo, we equip the investment management and the wider financial services industry with expert research, advanced analytics and strategic consulting advice.” Source: RevenueBase Database · checked Sep 29, 2026
19	Ashford & Alesseea	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	3 contacts →
	Partial evidence “Ashford & Alesseea is a management consulting firm that provides unique market perspective and business intelligence, to equip our clients with the requisite knowledge to make…” Source: RevenueBase Database · checked Sep 29, 2026
20	Zetta Capital	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Indirect evidence “Zetta Capital is a private quantitative research and distribution company.” Source: RevenueBase Database · checked Sep 29, 2026
21	A-Quant	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Indirect evidence “We are a team of experts in Artificial Intelligence, Computational Finance & Finance with more than 25 years trading experience each, having worked in Hedge funds, big…” Source: RevenueBase Database · checked Sep 29, 2026
22	Smithson Capital Management LTD	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	3 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
23	Alumni Advisors	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Indirect evidence “Alumni Advisors has been created with the purpose to provide expert guidance, strategic advice and implementation solutions to institutional investors, enabling them to optimise…” Source: RevenueBase Database · checked Sep 29, 2026
24	Qarma Technology	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Partial evidence “Qarma Technology offers dynamic portfolio solutions that empower investors to redefine and enhance their investment decision-making process.” Source: RevenueBase Database · checked Sep 29, 2026
25	Quant Foundry Limited	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	2 contacts →
	Indirect evidence “At Quant Foundry we provide quantitative solutions to our finance and vendor clients and are expanding operations into multiple industrial sectors.” Source: RevenueBase Database · checked Sep 29, 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: portfolio optimization 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 portfolio optimization consulting firms.
Partial evidence: Its own public description names part of portfolio optimization consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name portfolio optimization 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 95 portfolio optimization consulting firms based in London, United Kingdom

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Portfolio optimization consulting firms based in London, United Kingdom at a glance

As of Sep 29, 2026

50.4%Verified-email coverage

14.4Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 95 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 portfolio optimization 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 “portfolio optimization 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 portfolio optimization 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 portfolio optimization 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, 690 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 29, 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 portfolio optimization 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 portfolio optimization consulting firms are there based in London, United Kingdom?

RevenueBase identified 95 portfolio optimization 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?

Mercer UK, headquartered in London, tops this list with the largest team on record.

Which city in the United Kingdom has the most portfolio optimization consulting firms?

London leads the United Kingdom with 95 headquartered companies, followed by Bath (2) and Birmingham (2).

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 690 verified decision-maker contacts tracked across these 95 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 29, 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.