The security industry in the UK is undoubtedly one of the most competitive, and it’s easy to see why. With crime rates continuing to rise in certain areas of England and Wales, the demand for reliable security solutions has never been more pressing.
But which companies are leading the charge in this growing sector? At ZAM FM Ltd, we believe it’s essential to stay at the forefront of our field by keeping an eye on industry leaders.
In this article, we’ll take a closer look at what truly defines a top security company. A common search may reveal the biggest names, but does size equate to quality? Let’s examine how the UK’s largest security companies measure up by revenue and what that might mean for making an informed choice when selecting the right provider for your needs.
List of 25 Biggest Security Companies in the UK
Security in the UK is a highly competitive industry, driven by the rising demand for advanced solutions in response to increasing crime rates. In this article, we’ll explore the largest players in this sector, based on their annual turnover, and see how they measure up. These companies have made a significant impact in both local and international markets, each contributing to the ever-evolving landscape of UK security.
1. Mitie
2024 Turnover – £883 Million
Mitie is currently the largest security company in the UK, generating an impressive £883 million in revenue in 2024. While the company may not be a household name, its influence is widespread across a multitude of sectors. Mitie’s growth is fueled by its diverse range of services that span beyond security, including facilities management, catering, and energy services. Its financial success can largely be attributed to its ability to adapt to market needs and provide innovative security solutions tailored to both large-scale corporations and smaller businesses.
2. G4S
2024 Turnover – £797 Million
G4S is a name that resonates far beyond the UK, positioning itself as one of the most recognisable global security companies. With a turnover of £797 million in 2024, G4S continues to thrive in delivering large-scale security projects. Their expertise lies in sectors ranging from public services to private security solutions, and their ability to manage complex projects across various industries is a key factor behind their immense success. G4S remains at the forefront of the security world, trusted by governments and organisations worldwide.
3. ZAM FM Ltd
ZAM FM Ltd’s reputation in the security sector continues to grow, underpinned by a solid financial performance. ZAM FM Ltd is particularly known for its integrated facilities services, which allow the company to deliver comprehensive security solutions across different environments, from commercial buildings to public spaces. Their focus on customer satisfaction and operational efficiency has driven sustained growth.
4. Securitas Security Services
2024 Turnover – £258 Million
Originally founded in Sweden, Securitas has cemented itself as a key player in the UK security market with a turnover of £258 million in 2024. Their global presence is reinforced by their ability to provide cutting-edge security services, from guarding to advanced surveillance systems. Securitas has consistently focused on blending technology with traditional security services, offering clients a wide array of solutions that are both scalable and reliable. Their success in local markets, combined with their international influence, makes them a formidable force.
5. Wilson James
2024 Turnover – £229 Million
Wilson James, founded in 1988, has steadily grown into a significant player in the security industry. Their 2024 turnover of £229 million highlights the company’s consistent expansion. Initially known for security guarding, Wilson James has diversified into construction logistics and aviation services, helping to bolster its presence in multiple sectors. This broad portfolio allows the company to remain flexible and adaptive, ensuring continued financial success and an expanding customer base.
6. OCS Group Limited
2024 Turnover – £166 Million
OCS Group is a company with deep historical roots, beginning its journey over a century ago. From its humble start as a one-man window cleaning service, OCS has evolved into a security giant, with a 2024 turnover of £166 million. The company’s strength lies in its wide-reaching operations that cover not only security but also cleaning, waste management, and more. OCS’s ability to evolve with the times while maintaining high service standards has been key to their longevity and growth.
7. Total Security Services (TSS)
2024 Turnover – £132.7 Million
Total Security Services (TSS) has built a reputation for reliability and excellence in the security industry. Their turnover in 2024 reached £132.7 million, a testament to their continued success. TSS operates across a wide range of sectors, providing tailored security solutions that meet the specific needs of their clients. Their customer-focused approach has ensured a steady stream of business, driving their financial achievements year after year.
8. Kingdom Security
2024 Turnover – £132.4 Million
Kingdom Security, founded in 1993, has consistently delivered strong financial performance, with a 2024 turnover of £132.4 million. The company has built its success on its ability to adapt and innovate, providing a broad range of services, including security guarding, cleaning, and environmental solutions. Kingdom Security’s emphasis on delivering high-quality services at competitive prices has earned it a reputation as a trusted partner for businesses across the UK.
9. ICTS UK
2024 Turnover – £112 Million
Since its inception in 1987, ICTS UK has become known for its innovative approach to security. With a 2024 turnover of £112 million, ICTS has firmly established itself as one of the top security providers in the UK. Specialising in aviation and high-risk environments, ICTS combines cutting-edge technology with tried-and-tested security measures to deliver exceptional services. Their commitment to staying ahead of industry trends has played a significant role in their continued success.
10. SSGC
2024 Turnover – £104 Million
Securing the final spot in the top 10, SSGC recorded a turnover of £104 million in 2024. SSGC has positioned itself as a forward-thinking company, often branding itself as the most advanced security firm in the UK. Their success stems from their use of modern technology to provide security solutions that are not only effective but also highly efficient. SSGC’s focus on innovation has allowed them to remain competitive in an increasingly crowded market.
11. Sodexo
2024 Turnover – £103 Million
Though originally founded in France in 1966, Sodexo has become a global powerhouse, offering a variety of services, including security, in the UK. Their wide-ranging portfolio has enabled them to generate impressive revenue figures. In 2024, Sodexo reported a turnover of £103 million, further solidifying their position as one of the top security companies in the UK. Their ability to integrate multiple services has given them a unique advantage in the market.
12. Carlisle Support Services
2024 Turnover – £96 Million
Carlisle Support Services, established in 2011, operates with a clear focus on understanding the “why” behind their clients’ needs. This approach has allowed them to deliver tailored solutions that align with their clients’ goals, leading to their continued success. Their 2024 turnover of £96 million is proof of their strong position within the UK security market. Carlisle’s commitment to client satisfaction has been a driving force behind their growth.
13. Amberstone
2024 Turnover – £87 Million
Amberstone is a relatively new name in the security industry, having been founded in 2016. Despite their youth, they have made a significant impact thanks to their high-tech approach to security. Their innovative solutions have allowed them to carve out a niche in the market, and their efforts were rewarded with a turnover of £87 million in 2024. Amberstone’s forward-thinking strategy positions them as one to watch in the coming years.
14. Corps Security
2024 Turnover – £85 Million
Corps Security, originally established in the 19th century, began as a social enterprise aimed at providing meaningful employment for ex-military personnel. Over time, Corps has grown into a multimillion-pound business, offering a wide range of security services. Their 2024 turnover of £85 million highlights their evolution from a charitable organisation to a key player in the UK’s security industry.
15. CIS Security
2024 Turnover – £79 Million
Founded in 1969, CIS Security has a strong heritage rooted in law enforcement and security. Their deep understanding of both sides of the industry has been instrumental in their growth over the decades. With a 2024 turnover of £79 million, CIS has cemented its place as one of the leading security providers in the UK. Their ability to blend traditional values with modern security practices has kept them at the forefront of the industry.
16. Loomis Security
2024 Turnover – £67 Million
Loomis Security is perhaps best known for its fleet of armoured vehicles, which serve businesses both large and small across the UK. Over the years, they have become a trusted name in cash handling and transport security. Their iconic status has helped them achieve a notable 2024 turnover of £67 million, demonstrating the value they bring to the market. Loomis’ longstanding reputation for reliability makes them a key player in the security sector.
17. Profile Security Services
2024 Turnover – £57 Million
Since its inception in 1989, Profile Security Services has remained focused on quality over quantity. By carefully selecting their contracts and concentrating on high-value projects, Profile has built a reputation for excellence. This approach has not only ensured their sustained growth but has also contributed to their impressive 2024 turnover of £57 million. Their strategy of pursuing selective, high-quality jobs continues to be a key factor in their success.
18. interr Security
2024 Turnover – £54 Million
Founded by two European businessmen, interr Security was created to fill a perceived gap in the market. They saw the need for a robust, reliable security service that could meet the growing demands of businesses across the UK. This vision has come to life in the form of a multimillion-pound company, with interr Security achieving a turnover of £54 million in 2024. Their continued success is driven by their ability to meet the needs of a constantly evolving security landscape.
19. Man Commercial Protection
2024 Turnover – £52 Million
With over 30 years in the security business, Man Commercial Protection is a well-established name in the UK. Their longevity is backed by a stellar reputation for providing dependable security services across various sectors. Their 2024 turnover of £52 million is a testament to their continued growth and relevance in the industry. Having been a staple in the security market for decades, they’ve built a foundation of trust that keeps their clients coming back year after year.
20. Ward Security
2024 Turnover – £44 Million
Ward Security has built a strong foundation on three core principles: purpose, vision, and service. These values are embedded into every aspect of their operations, helping them provide high-quality security services to their clients. This dedication to service excellence has allowed Ward Security to achieve its highest turnover yet in 2024, reaching £44 million. Their steady growth reflects their commitment to adapting to client needs and providing top-tier security solutions.
21. Bold Security Group
2024 Turnover – £43 Million
Founded in 2011, Bold Security Group is one of the younger firms on this list. Despite their relatively short history, Bold has seen an incredible rise within the security industry, quickly establishing themselves as a top provider. Their rapid growth is reflected in their impressive 2024 turnover of £43 million. Bold’s innovative approach and commitment to excellence have allowed them to secure their place among the UK’s largest security companies in a short period of time.
22. Professional Security
2024 Turnover – £36 Million
Professional Security, also known as Effective Security Services, has been a key provider of security solutions to the hospitality and leisure industries since 2005. Their work with high-profile clients, such as popular entertainment venues, bars, and restaurants, has helped them secure substantial contracts that contribute significantly to their overall revenue. In 2024, the company reported an impressive turnover of £36 million. Their focus on client satisfaction and delivering tailored security services has kept them competitive in a crowded market.
23. Showsec
2024 Turnover – £32 Million
Showsec has earned a reputation as one of the most recognizable security companies in the UK, particularly in the entertainment and event industries. Known for their presence at live music events, festivals, and sporting occasions, Showsec has become a trusted name when it comes to crowd management and event security. Their specialized services have enabled them to generate substantial revenue, with a 2024 turnover of £32 million. Showsec’s focus on high-profile events has made them a key player in the sector, continuously growing their market share.
24. STM Group
2024 Turnover – £31 Million
Established in 2005, STM Group has rapidly grown from a London-based startup to a nationally recognized security provider. Their expansion into multiple cities, including Manchester, has allowed them to tap into new markets and industries, driving their growth in both size and revenue. STM’s commitment to providing high-quality security services has earned them a turnover of £31 million in 2024, marking them as one of the fast-growing companies on this list. Their continued expansion is a testament to their strategic vision and ability to adapt to a competitive landscape.
25. Lodge Service
2024 Turnover – £22 Million
Founded over a century ago, Lodge Service is one of the oldest security firms on our list, with roots dating back to 1919. The company started as a small, family-run business and has since evolved into a major player in the UK security industry. Over the years, Lodge Service has established a strong reputation, particularly in Gloucestershire and surrounding areas, consistently delivering reliable security services. Their experience and legacy have contributed to their financial success, as demonstrated by their record turnover of £22 million in 2024. Despite their long-standing history, Lodge continues to innovate and adapt to the changing demands of modern security.
Should Size Really Be the Benchmark of Who Is the Best?
When evaluating a security company, the size of the organization is often seen as a key indicator of success. While high turnover and substantial profit margins may suggest stability and growth, they don’t always guarantee that the company will be the right fit for your security needs. In fact, some argue that larger companies may struggle to offer the same level of personalized service that smaller firms can provide.
At ZAM FM Ltd, we recognize that each client has unique requirements, and finding the right security solution involves more than just looking at financial performance. Companies with large earnings often have more clients to manage, which may result in less individual attention. A smaller, more agile security provider can focus on offering tailored services, ensuring that each client receives the care they deserve.
What Defines Quality in the Security Industry?
The security industry is regulated by various standards, and one of the most trusted indicators of quality is the Approved Contractor Scheme (ACS) score. This score is awarded to security companies that meet stringent criteria, offering a reliable way to measure a company’s overall performance.
With over 800 security firms measured under this scheme, it provides a clearer comparison of companies based on the quality of their service rather than their size or revenue. A high ACS score reflects a company’s ability to meet client needs while adhering to industry regulations. At ZAM FM Ltd, we pride ourselves on maintaining high standards that are reflected in our ACS rating, ensuring that we provide top-tier security solutions.
Why ACS is a Better Benchmark Than Turnover
Although revenue figures are often the first thing clients look at when choosing a security company, the ACS score offers a more accurate picture of the service quality. A large turnover may indicate success, but it doesn’t always account for the nuances of customer service, response times, or employee training.
The ACS framework measures companies against consistent criteria, focusing on elements that truly affect the service clients receive, such as management efficiency, customer care, and adherence to best practices. Choosing a company based on ACS scores can give you confidence that the firm is dedicated to providing a safe, secure environment for your property or business.
Key Aspects to Consider When Choosing a Security Company
From our experience at ZAM FM Ltd, there are five key elements that can make all the difference when selecting a security provider. These factors directly impact the quality of service and the overall experience you’ll have:
- Response Time: The speed at which a company responds to an incident is crucial. Delayed action can result in increased damage or risk.
- Customer Support: A dedicated support team ensures that your concerns are addressed promptly and efficiently, offering peace of mind when you need it most.
- Training and Expertise: Highly trained personnel provide not just security, but proactive protection. Their knowledge and skills are critical in preventing incidents before they occur.
- Technology and Innovation: In today’s world, a modern security system must utilize advanced technology to remain effective. This includes everything from CCTV systems to real-time monitoring platforms.
- Reputation and Reviews: A company’s track record, along with customer reviews, often paints a clear picture of what you can expect. Consistent positive feedback is a strong indicator of reliability.
At ZAM FM Ltd, we ensure that all these aspects are covered in every service we offer, providing you with security solutions that are both robust and tailored to your specific needs.
