Martyn Tennant Partner and Head of Corporate
Corporate and Commercial
Martyn Tennant is a highly regarded corporate lawyer and the trusted advisor of choice for ambitious businesses navigating complex transactions. With a primary focus on mergers and acquisitions, private equity, and corporate restructuring, Martyn advises businesses of all sizes—from high-growth start-ups to listed companies—on both a national and international scale.
After earning his Law LLB (Hons) from Durham University, Martyn qualified as a solicitor in 2007. His rapid rise in the legal profession saw him promoted to Partner at Swinburne Maddison in 2010—just three years after qualification—before taking the helm as Head of the Corporate and Commercial team in 2011. Under his leadership, the department has expanded significantly, playing a central role in some of the most high-profile transactions in the North East.
Martyn’s unique perspective stems from his own experience in business growth, having been instrumental in Swinburne Maddison’s transformation from a firm of 30 employees to one of the region’s leading law firms. This deep commercial insight enables him to provide strategic, pragmatic advice tailored to the realities of running and scaling a business. Since 2019, he has also been a member of the firm’s Management Team, playing a pivotal role in Swinburne Maddison’s strategic growth.
Passionate about fostering business growth in the North East, Martyn takes pride in working on transformative deals that contribute to the regional economy and create lasting value for local businesses. He works closely with business owners, private equity investors, and corporate stakeholders, providing insightful, commercially focused advice on growth and exit strategies. His clients value his ability to simplify complex transactions, anticipate challenges, and deliver solutions that align with their long-term business objectives.
- Mergers and Acquisitions
- Private Equity and Venture Capital
- Joint Ventures
- Corporate Reorganisations and Strategy
- Partnerships
With over 15 years of experience, Martyn is a leading figure in corporate law, particularly in transactional services. His expertise spans mergers and acquisitions, private equity and venture capital, joint ventures, corporate reorganisations, and strategic partnerships across various sectors including; hospitality, energy, manufacturing and engineering, professional services, healthcare and transport.
As Head of the Corporate and Commercial team, Martyn oversees the firm’s transactional practice, leading teams on regionally significant high-value deals, often with values in excess of £30m. He specialises in advising owner-managed businesses on the legal aspects of their growth and exit strategies, ensuring deals are structured efficiently and effectively for all parties involved.
Recent career highlights include:
- Led the sale of Amberstone Security Group Limited to US-based Argenbright Security LLC.
- Retained as a trusted advisor for Argenbright Security LLC in the acquisition of The Protector Group.
- Advised on the sale of NB Medical Limited to private equity-backed Agora Education.
- Guided the acquisition of Genesis Brands Limited by French multinational Geflor.
- Advised on the sale of John Wade (Transport) Limited and Stonegrave Aggregates Limited to Ashcourt Group Limited.
Martyn’s extensive commercial experience—both as a legal advisor and a firm leader—gives him a unique understanding of the challenges businesses face. His pragmatic, solution-focused approach sets him apart, making him a trusted partner for clients seeking strategic corporate advice.
Described as a ‘Transactional expert and exceptional corporate solicitor’, Martyn was named as a Leading Partner in the 2026 edition of the Legal 500, highlighting his corporate and commercial expertise. Prior to this, he was consistently recognised as a Leading Partner in the previous seven editions.
Prior to his recent successes in The Legal 500, Martyn was widely recognised for his expertise early in his career. In 2015, he was named Young Lawyer of the Year at the Northern Law Awards and Corporate Lawyer of the Year at the North East Dealmaker Awards.
"Martyn Tennant is an exceptional corporate solicitor. He understands business as well as the law and combines the two brilliantly into clear, concise advice and detailed insight into the deal."
"We would have no hesitation in recommending Martyn Tennant to any potential clients who require advice on a wide variety of issues."
Articles & Insights by Martyn Tennant
News
Leading North East agency expands with acquisition of established Jesmond lettings agency
Your Move franchise partner Your Move Chris Stonock has acquired Newcastle-based lettings agency Rhapsody Property Consultants, located in the popular suburb of Jesmond. The acquisition marks the 14th office within the Your Move Chris Stonock network and significantly strengthens the company’s presence across the NE1, NE2 and NE3 postcode areas. The move represents another important […]
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Volue acquires UK energy technology company Quorum Technology in significant inward investment deal
Quorum Developments Ltd, which trades as Quorum Technology, has been acquired by Volue, marking a significant inward investment into the UK energy technology sector. Based at NETPark in Sedgefield, County Durham, Quorum provides mission-critical IT infrastructure to the UK energy industry, including systems that support the Balancing Mechanism Market, the real-time marketplace operated by National Grid ESO that […]
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NVM and eComplete complete £31m MBO at Durham fragrance firm
NVM Private Equity and eComplete have completed a £31m MBO at a Durham-based fragrance business, which is rapidly growing. Noted Aromas is a direct-to-consumer fragrance brand which provides UK-manufactured, affordable products to its growing customer base. The MBO was led by NVM in partnership with eComplete, the e-commerce specialists and majority shareholders behind The Beauty […]
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Insight
Do Businesses need an AI Policy? The Businesses That Benefit Most From AI May Not Be The Ones Adopting It Fastest
Artificial intelligence is rarely out of the headlines. Whether it is the latest advances in generative AI, increasing investment in AI-powered tools, or growing debate around regulation and ethics, there is no doubt that AI is changing the way businesses operate. Yet many organisations are still asking a surprisingly simple question – Do we actually […]
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Renters’ Rights Act 2025: New Private Rented Sector Database to Roll Out Across England from December 2026
The Government has announced further details of the new landlord registration regime under the Renters’ Rights Act 2025 (RRA 2025). The new service, known as Register Your Rental Property, is expected to launch on 15th December 2026 and will introduce the Private Rented Sector Database. Although landlords will be able to register any rental property […]
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GastroNorth Management Buyout Backed by Six-figure NPIF II – NEL Investment
A six-figure investment from NPIF II – NEL Debt Finance, which is managed by NEL Fund Managers as part of the Northern Powerhouse Investment Fund II (NPIF II), has supported the successful management buyout of North East commercial kitchen specialist GastroNorth, creating a platform for future growth while safeguarding jobs, customer relationships and supply chain […]
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