Company lists · Data refreshed September 2026

Top 25 Securities trading firms based in the United Kingdom

Name: Securities trading firms based in the United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 112 companies tracked

RevenueBase identified 112 securities trading firms headquartered in the United Kingdom as of September 2026 and tracks 9,205 professional contacts across them, including 3,627 with verified work emails. London is the largest hub.

This list covers securities trading firms 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 22, 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 22, 2026 86% judged on-target in blind review

112Companies

9,205Contacts tracked

3,627Verified emails

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The 25 largest securities trading firms based in the United Kingdom

Ranked by team size

Top 25 of 112 securities trading firms based in the United Kingdom, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to securities trading 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	London Stock Exchange	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	1,001-5,000	1,631 contacts →
	Indirect evidence “The London Stock Exchange is at the heart of where ideas meet capital and become reality.” Source: RevenueBase Database · checked Sep 22, 2026
2	Hantec Markets	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	369 contacts →
	Indirect evidence “The Hantec Group was founded in Hong Kong in 1990.” Source: RevenueBase Database · checked Sep 22, 2026
3	Winterflood, A Division Of Marex	Indirect evidence	United KingdomHQ checked Sep 22, 2026	201-500	225 contacts →
	Indirect evidence “Winterflood, a division of Marex, is one of the UK’s leading equity market makers, providing liquidity and high quality execution services to institutional investors, retail…” Source: RevenueBase Database · checked Sep 22, 2026
4	ADM Investor Services International Limited	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	163 contacts →
	Indirect evidence “ADM Investor Services International Limited (ADMISI) is a full service brokerage company.” Source: RevenueBase Database · checked Sep 22, 2026
5	Britannia Global Markets Limited	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	109 contacts →
	Indirect evidence “Britannia Global Markets is a complete multi-asset brokerage offering execution, give-ins and give-ups, custody, and clearing services for a range of financial products to…” Source: RevenueBase Database · checked Sep 22, 2026
6	Sunrise Brokers LLP	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	108 contacts →
	Indirect evidence “Sunrise Brokers is an interdealer broker and offers a comprehensive service across equities, commodities, credit, interest rates, foreign exchange and hybrid products.” Source: RevenueBase Database · checked Sep 22, 2026
7	Blackwell Global	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	108 contacts →
	Indirect evidence “Founded in 2010, the Blackwell Global group of companies (“Blackwell Global”) was established to offer brokerage solutions for private and institutional clients.” Source: RevenueBase Database · checked Sep 22, 2026
8	London Capital Group	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	52 contacts →
	Indirect evidence “Established in 1996, London Capital Group has a rich history as both a private and public company, working with high value clients across various markets.” Source: RevenueBase Database · checked Sep 22, 2026
9	OTCX	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	49 contacts →
	Partial evidence “Whether you are using voice, chat, or email to source or provide liquidity on derivatives, OTCX will streamline your trading workflows and bridge the gap between high touch and…” Source: RevenueBase Database · checked Sep 22, 2026
10	Isam Securities	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	48 contacts →
	Strong evidence “iSAM Securities*, regulated by the FCA, SFC, and CIMA, is a leading algorithmic trading firm and trusted liquidity, technology and prime services partner to institutional clients…” Source: RevenueBase Database · checked Sep 22, 2026
11	Mariana UFP LLP	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	48 contacts →
	Indirect evidence “Founded in 2009 and headquartered in the City of London, Mariana UFP employs over 140 people across our offices in New York, Paris, Lisbon, Dubai and Melbourne.” Source: RevenueBase Database · checked Sep 22, 2026
12	Prismfp	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	43 contacts →
	Partial evidence “PrismFP Group is a R&D focused technology firm offering securities brokerage services to institutional clients through its brokerage affiliates Prism Financial Products LP in the…” Source: RevenueBase Database · checked Sep 22, 2026
13	SVS Securities PLC	Strong evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	41 contacts →
	Strong evidence “SVS Securities is a specialist stockbroker committed to building our clients' investments by delivering access to trading opportunities in stocks, CFDs, IPOs and corporate finance.” Source: RevenueBase Database · checked Sep 22, 2026
14	Alvar Financial Services Limited	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	39 contacts →
	Partial evidence “Alvar Financial Services is a boutique firm offering a variety of investment and trading services through its business lines - Equity Markets for professional and institutional…” Source: RevenueBase Database · checked Sep 22, 2026
15	Sigma Broking Limited	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	37 contacts →
	Indirect evidence “Sigma Broking Limited is a privately-owned brokerage company set up to service the individual needs of institutional customers We offer broking and execution services to…” Source: RevenueBase Database · checked Sep 22, 2026
16	United First Partners UFP	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	36 contacts →
	Indirect evidence “United First Partners (“UFP”) is a global financial services firm specializing in Special Situations Advisory, UFP has offices in New York, Miami, London, Paris, Geneva, Dubai and…” Source: RevenueBase Database · checked Sep 22, 2026
17	KEY To Markets	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	33 contacts →
	Indirect evidence “Key to Markets is an independent brokerage firm offering access to financial markets for institutional investors, companies and private traders.” Source: RevenueBase Database · checked Sep 22, 2026
18	Fixnetix LTD	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	33 contacts →
	Partial evidence “Fixnetix provides market data, trading access, liquidity venue connectivity, pre-trade risk and execution management technologies for Investment Banks, Hedge Funds and Proprietary…” Source: RevenueBase Database · checked Sep 22, 2026
19	TTG Capital	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	30 contacts →
	Indirect evidence “TTG CAPITAL LIMITED is a financial services company based out of 2ND FLOOR, 30 OLD BROAD STREET, LONDON, United Kingdom.” Source: RevenueBase Database · checked Sep 22, 2026
20	Gallardo Securities Limited	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	23 contacts →
	Partial evidence “Gallardo Securities was established in 2013 with the aim to deliver its clients first class execution services in equity derivatives markets.” Source: RevenueBase Database · checked Sep 22, 2026
21	Silvertide	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	23 contacts →
	Indirect evidence “We’re the leading fintech specializing in buy-side brokerage services.” Source: RevenueBase Database · checked Sep 22, 2026
22	MET Traders LTD	Partial evidence	London London, United KingdomHQ checked Sep 22, 2026	51-200	18 contacts →
	Partial evidence “Met Traders is a leading financial futures house that specialises in proprietary trading and market making across the world’s top derivative exchanges, including NYSE Liffe, NYSE…” Source: RevenueBase Database · checked Sep 22, 2026
23	Millennium Europe LTD	Partial evidence	London, United KingdomHQ checked Sep 22, 2026	11-50	16 contacts →
	Partial evidence “The next generation of electronic trading.” Source: RevenueBase Database · checked Sep 22, 2026
24	Abans Global Limited	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	201-500	15 contacts →
	Indirect evidence “Abans Global Limited (“AGL”) was incorporated in the year 2010 under the Companies Act, 2006.” Source: RevenueBase Database · checked Sep 22, 2026
25	GPP Group	Indirect evidence	London, United KingdomHQ checked Sep 22, 2026	51-200	12 contacts →
	Indirect evidence “GPP, part of the Titan Wealth Group, is a technology-enabled financial services firm providing execution, settlement, and custody services to clients that require a seamlessly…” Source: RevenueBase Database · checked Sep 22, 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: securities trading 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 securities trading firms.
Partial evidence: Its own public description names part of securities trading firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name securities trading 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 112 securities trading firms based in the United Kingdom

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Securities trading firms based in the United Kingdom at a glance

As of Sep 22, 2026

39.4%Verified-email coverage

82.2Average contacts per company

11-50Median size (employees)

76.8%Largest-city concentration · London

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 112 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 securities trading 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 the United Kingdom whose own description of what they do matches “securities trading 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 securities trading 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 securities trading firms, 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, 3,627 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 22, 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.

Securities trading firms by metro

Securities trading firms in London86

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 securities trading 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 securities trading firms are there based in the United Kingdom?

RevenueBase identified 112 securities trading firms 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?

London Stock Exchange, headquartered in London, tops this list with the largest team on record.

Which city has the most securities trading firms?

London leads with 86 headquartered companies, followed by City Of London (2) and Barnoldswick (1).

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 3,627 verified decision-maker contacts tracked across these 112 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 22, 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.