Top IPO companies in London

Public companies and recent post-IPO follow-on raises. Filtered to companies headquartered in London.

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Built from a search like: “Top IPO companies in London”

Ranked by current headcount across IPO companies headquartered in London. Refreshed daily.

1
HSBC· London, England, United Kingdom
Opening up a world of opportunity for our customers, investors, ourselves and the planet.We're a financial services organisation that serves more than 40 million customers, ranging from individual savers and investors to some of the world’s biggest companies and governments. Our network covers 58 countries and territories, and we’re here to use our unique expertise, capabilities, breadth and perspectives to open up a world of opportunity for our customers. HSBC is listed on the London, Hong Kong, New York, and Bermuda stock exchanges.To view our social media terms and conditions please visit the following webpage: http://www.hsbc.com/social-TandCs
- Post-IPO debt
- 200.3k employees
2
Vodafone· London, England, United Kingdom
At Vodafone, our purpose is to connect everyone. From the seabed to the stars, we provide innovative mobile and fixed connectivity solutions to empower our customers across the globe. And we're constantly expanding coverage to bridge continents and spread inclusion, even in the most remote places. When everyone is connected, we can create a future full of possibilities. Find more information at www.vodafone.com#EveryoneConnected
- post ipo secondary
- 155.7k employees
- Founded 1982
3
G4S· London, England, United Kingdom
G4S is a leading security and facility services company that provides proactive security services and cutting-edge smart technology to deliver tailored, integrated security solutions that allow clients to focus on their core business. Through a global workforce of approximately 800,000 people, we leverage best practices in communities all over the world. With revenues at approximately $20 billion, we are supported by efficient processes and systems that can only come with scale to help deliver our promise locally: keeping people safe so our communities can thrive. For more information on G4S, visit www.g4s.com.
- Post-IPO equity
- 117.4k employees
- Founded 1901
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4
Aon· London, England, United Kingdom
We exist to shape decisions for the better — to protect and enrich the lives of people around the world. Through actionable analytic insight, globally integrated Risk Capital and Human Capital expertise, and locally relevant solutions, our colleagues provide clients in over 120 countries with the clarity and confidence to make better risk and people decisions that help protect and grow their businesses.
- Post-IPO debt
- 94.4k employees
- Founded 1979
5
DXC Technology· Ashburn, Virginia, United States
DXC Technology helps global companies run their mission-critical systems and operations while modernizing IT, optimizing data architectures, and ensuring security and scalability across public, private and hybrid clouds. The world's largest companies and public sector organizations trust DXC to deploy services to drive new levels of performance, competitiveness, and customer experience across their IT estates. Instagram: https://www.instagram.com/dxctechnologyYoutube: https://www.youtube.com/DXCTechnologyTikTok: https://www.tiktok.com/@dxc_technology
- Post-IPO debt
- 90.8k employees
- Founded 2017

6
bp· London, England, United Kingdom
Check out our commenting guidelines 👉 bp.com/CommentsGuide
- Post-IPO equity
- 82k employees
- Founded 1909
7
Standard Chartered· London, England, United Kingdom
We are a leading international banking group, with a presence in 54 of the world’s most dynamic markets. Our purpose is to drive commerce and prosperity through our unique diversity, and our heritage and values are expressed in our brand promise, here for good. If you’re interested joining Standard Chartered sign up to our Talent Network. Link: https://www.sc.com/careers/talentnetwork Standard Chartered PLC is listed on the London and Hong Kong stock exchanges.
- Post-IPO debt
- 80.1k employees
8
BT Group· London, England, United Kingdom
We’re one of the world’s leading communications services companies. At BT Group, the solutions we sell are integral to modern life. Our purpose is as simple as it is ambitious: we connect for good. There are no limits to what people can do when they connect. And as technology changes our world, connections are becoming even more important to everyday life.Today, that’s truer than ever. The connections we make are helping solve the world’s biggest challenges such as the global pandemic, climate change and cyber security. Through the power of technology, we’re supporting customers to live, work and play together better.
- Post-IPO equity
- 74k employees
- Founded 1969
9
Lloyds Banking Group· London, England, United Kingdom
Our purpose is Helping Britain Prosper. We do this by creating a more sustainable and inclusive future for people and businesses, shaping finance as a force for good.We're part of an ever-changing industry and are currently on a journey to shape the financial services of the future, whilst supporting our customers’ changing needs.The scale and reach of our Group means we can offer a broad range of opportunities to learn, grow and develop. Our values-led culture and approach to inclusion and diversity means we can all make a real difference together.
- Post-IPO debt
- 57.9k employees
- Founded 1985
10
BAT· London, England, United Kingdom
We are BAT, a leading global consumer goods company driven by a clear purpose: to create A Better TomorrowTM by Building a Smokeless World.Founded in 1902, we’ve grown into a truly international business, operating across six continents with a presence in over 180 markets. Our strategic ambition is to become a predominantly smokeless business by 2035**, helping adult smokers transition to scientifically substantiated, reduced-risk*† alternatives.With a powerful portfolio of global brands, a future-focused strategy, and around 50,000 talented people worldwide, we are committed to accelerating Tobacco Harm Reduction and making cigarettes a thing of the past.As a leading FTSE company, our operations span three key regions:🌍 United States of America🌍 Americas & Europe (AME)🌍 Asia Pacific, Middle East & Africa (APMEA)Together, we are building A Better TomorrowTM.* Based on the weight of evidence and assuming a complete switch from cigarette smoking. These products are not risk free and are addictive.**Please refer to the cautionary statement contained in the Annual Report and Form 20-F 2024 on p.447 for additional information regarding BAT’s future performance: https://www.bat.com/ar/2024/index.html† Our Vapour product Vuse (including Alto, Solo, Ciro and Vibe), and certain products, including Velo, Grizzly, Kodiak, and Camel Snus, which are sold in the U.S., are subject to FDA regulation and no reduced-risk claims will be made as to these products without agency clearance.
- Post-IPO debt
- 46.7k employees
- Founded 1902

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Find engineers at IPO companies in London

IPO companies in London are some of the fastest-moving employers in the market. The list above ranks the largest IPO-stage companies headquartered in London by current headcount, drawn from public LinkedIn and Crunchbase records. With 301 matching companies in Refolk’s index, the density of senior engineers, designers, and founders is unusually high.

At IPO, teams tend to be small, ambitious, and on the hunt for senior talent. The companies on this list are good signals for where the London talent market is heating up - and for which engineers and founders are about to become tomorrow’s operators.

Refolk converts this list into a live search. Ask for “founders of IPO companies in London” or “senior engineers at IPO companies in London hiring” and Refolk returns a ranked shortlist with evidence behind each match.

How this list is built

Refolk pulled IPO companies headquartered in London from public LinkedIn and Crunchbase records, ranked them by current employee count, and kept those with at least 5 employees. The list refreshes once a day.

Last refreshed: Wed, 05 Aug 2026 15:30:56 GMT

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How is this ranking built?

The list draws on the public company graph - headcount and growth signals, funding history, and recency. The criteria chips at the top show exactly which filters produced it, and the methodology section explains the ranking.

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