Company lists · Data refreshed September 2026

Top 25 Stock trading software developers based in London, United Kingdom

Name: Stock trading software developers 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 96 companies tracked

RevenueBase identified 96 stock trading software developers headquartered in London, United Kingdom as of September 2026 and tracks 5,743 professional contacts across them, including 2,973 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers stock trading software developers 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

96Companies

5,743Contacts tracked

2,973Verified emails

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The 25 largest stock trading software developers based in London, United Kingdom

Ranked by team size

Top 25 of 96 stock trading software developers 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 stock trading software developers: 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	ION	Strong evidence	London, United KingdomHQ checked Sep 29, 2026	10001+	3,655 contacts →
	Strong evidence “We’re visionary innovators who are delivering mission-critical trading and workflow automation software to financial institutions, corporations, central banks, and governments.” Source: RevenueBase Database · checked Sep 29, 2026
2	Fidessa	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1,001-5,000	480 contacts →
	Partial evidence “Exceptional trading, investment and information solutions for the world's financial community.” Source: RevenueBase Database · checked Sep 29, 2026
3	Lseg Tora	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	249 contacts →
	Partial evidence “LSEG TORA is a leading provider of advanced investment management technologies for global asset managers, hedge funds, proprietary trading firms and sell-side trading desks.” Source: RevenueBase Database · checked Sep 29, 2026
4	Genesis Global	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	201-500	220 contacts →
	Partial evidence “Genesis Global enables financial markets organizations to innovate at speed through a software application development platform, prepackaged solutions and deep expertise in…” Source: RevenueBase Database · checked Sep 29, 2026
5	Quadrature	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	203 contacts →
	Indirect evidence “Founded by programmers in 2010, we’re a growing tech business made up of kind, friendly, talented people.” Source: RevenueBase Database · checked Sep 29, 2026
6	Tools For Brokers	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	93 contacts →
	Indirect evidence “Tools for Brokers (TFB) is a multiplatform technology provider for retail brokers and hedge funds with solutions operating on MetaTrader and Match-Trader.” Source: RevenueBase Database · checked Sep 29, 2026
7	Equity Edge	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	77 contacts →
	Partial evidence “We build and operate a simulated trading evaluation platform.” Source: RevenueBase Database · checked Sep 29, 2026
8	Singletrack	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	70 contacts →
	Indirect evidence “Singletrack Sell Side helps banks, brokers and IRPs leverage their research, sales and corporate assets to maximum advantage in an increasingly competitive marketplace.” Source: RevenueBase Database · checked Sep 29, 2026
9	Caplin Systems	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	68 contacts →
	Partial evidence “Caplin delivers cutting-edge trading technology, empowering financial institutions with high-performance, multi-asset platforms for FX, crypto, fixed income, and more.” Source: RevenueBase Database · checked Sep 29, 2026
10	Netdania	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	34 contacts →
	Indirect evidence “Established in 1998, Netdania has emerged as a leading figure in financial technology.” Source: RevenueBase Database · checked Sep 29, 2026
11	KEY To Markets	Indirect evidence	London, United KingdomHQ checked Sep 29, 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 29, 2026
12	Mahimarkets	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	31 contacts →
	Partial evidence “Combining extensive trading knowledge and robust engineering, we’ve been crafting solutions for banks and brokers since 2010; helping our customers to drive PnL and deliver low…” Source: RevenueBase Database · checked Sep 29, 2026
13	Quadra	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	24 contacts →
	Partial evidence “Quadra.trade is a purpose-built software platform designed for hedge funds and institutional investors operating in digital asset markets.” Source: RevenueBase Database · checked Sep 29, 2026
14	Silvertide	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	23 contacts →
	Indirect evidence “We’re the leading fintech specializing in buy-side brokerage services.” Source: RevenueBase Database · checked Sep 29, 2026
15	Chronicle Software	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	19 contacts →
	Partial evidence “Founded in 2013 by Java Champion Peter Lawrey, Chronicle Software is on a mission to revolutionise financial technology through proven practices and collaboration.” Source: RevenueBase Database · checked Sep 29, 2026
16	BESTX	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	18 contacts →
	Partial evidence “BestX® is a Technology Company, with a simple fee based model, creating state of the art software to provide real-time, interactive analytics enabling clients to define, achieve…” Source: RevenueBase Database · checked Sep 29, 2026
17	Prismfp Analytics	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “The digital platform for a new generation brokerage, built from the ground up by market practitioners and technologists.” Source: RevenueBase Database · checked Sep 29, 2026
18	Arctic Lake	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	11 contacts →
	Partial evidence “We understand that one-size-fits-all trading platforms can't deliver every feature you need to grow your business.” Source: RevenueBase Database · checked Sep 29, 2026
19	FCS Capital Markets	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	9 contacts →
	Indirect evidence “FCS CAPITAL MARKETS Ltd, based in London with an office in Nyon, Switzerland, is a forward-thinking broker-dealer at the forefront of high-tech finance.” Source: RevenueBase Database · checked Sep 29, 2026
20	OSYS	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	51-200	9 contacts →
	Partial evidence “Osys is a fintech company that offers an innovative software ecosystem to boost business in the financial sector.” Source: RevenueBase Database · checked Sep 29, 2026
21	Traders Connect	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	9 contacts →
	Partial evidence “Traders Connect is a revolutionary software platform designed for traders seeking unparalleled efficiency in managing their portfolios.” Source: RevenueBase Database · checked Sep 29, 2026
22	Updata Limited	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect evidence “The Updata team has decades of experience in the technical analysis of financial markets.” Source: RevenueBase Database · checked Sep 29, 2026
23	ATC Brokers	Indirect evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect evidence “ATC Brokers is a trusted broker that has been serving both individual and institutional investors for over 15 years.” Source: RevenueBase Database · checked Sep 29, 2026
24	link.investments	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	11-50	7 contacts →
	Partial evidence “Empowering professional investors with innovative trading solutions and exceptional value.” Source: RevenueBase Database · checked Sep 29, 2026
25	Foreign Exchange Traders LTD FXT	Partial evidence	London, United KingdomHQ checked Sep 29, 2026	1-10	6 contacts →
	Partial evidence “Foreign Exchange Traders (FXT) was incorporated by several retail traders with a common vision, to automate profitable strategies to allow trading across multiple brokers and…” 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: stock trading software developers. 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 stock trading software developers.
Partial evidence: Its own public description names part of stock trading software developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name stock trading software developers. 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 96 stock trading software developers based in London, United Kingdom

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Stock trading software developers based in London, United Kingdom at a glance

As of Sep 29, 2026

51.8%Verified-email coverage

59.8Average contacts per company

11-50Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 96 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 stock trading software developers, 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 “stock trading software developers”. 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 stock trading software developers), 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 stock trading software developers, 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, 2,973 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 stock trading software developers, 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 stock trading software developers are there based in London, United Kingdom?

RevenueBase identified 96 stock trading software developers 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?

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

Which city in the United Kingdom has the most stock trading software developers?

London leads the United Kingdom with 96 headquartered companies, followed by Brighton (2) and Exeter (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 2,973 verified decision-maker contacts tracked across these 96 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.