Thomson Reuters names eight Keystone Law partners in its Stand-out Lawyers Guide 2026
Andrea James, Andrew Darwin & Anna McKibbin
“I’ve enjoyed working with Steve over many years. His legal advice is clear and accurate and always firmly grounded in commercial good sense. ”
- Hwfa Gwyn, CFO, Hybrid Air Vehicles Ltd
“Steve is a trusted advisor and our first call on English law legal issues. He is very responsive and always addresses our requirements promptly in a pragmatic manner. ”
- Antonia Azan General Counsel, AMA Corporation Plc
“Stephen McGlennan has a deep knowledge of corporate and commercial law, but also the experience of having worked within entrepreneurial business including as COO and CEO. This blended mixture of experience means that you are provided robust legal advice, balanced by commercial pragmatism. I find this approach to be very valuable. He is always available to talk over issues and act as a sounding board. In short, he is a great support to our company and I would recommend him to any other SME. ”
- Catherine Regan, Senior Legal Counsel Trinity College, London
“Steve is a responsive and experienced lawyer who can handle challenging transactions and other business situations with great skill. He has a high commercial sense - and brings this perspective as well as strong legal knowledge to his work. His international experience in the Middle East and elsewhere has proved useful on the work I have done with him. ”
- Mark Lemmon, Former CEO/Executive Vice Chairman MENA Infrastructure Fund
Steve is a highly experienced corporate and commercial lawyer with in-depth understanding of business issues, having been the Chief Executive Officer of two businesses. During his tenure as the CEO of a leading aerospace business, the company valuation increased from £6m to £100m, so he fully understands all the challenges and obstacles faced by growing businesses.
Steve has a particular focus in working with start-up and other growth companies, businesses in the aerospace and defence sector and technology companies. In 2021 he acted for a tech-sector issuer on a €150 million IPO and for an aerospace company on a $200 million pre-IPO equity line.
Steve also has significant non-contentious experience in the insurance and wider financial sector.
Stephen advises on business acquisitions, joint ventures, M&A, Takeover Code matters, and partnering, delivering strategic guidance on complex corporate transactions across sectors including technology and defence.
Experience
Stephen is experienced in aerospace and defence sectors, advising on security-related projects, corporate partnerships, and compliance within highly regulated environments.
Experience
Stephen is experienced in aerospace and defence sectors, advising on security-related projects, corporate partnerships, and compliance within highly regulated environments.
Experience
Stephen supports start-ups and growth companies with private fundraising, crowdfunding, technology ventures, and business development.
Experience
Stephen provides legal advice on non-contentious insurance matters, focusing on regulatory compliance, policy structuring, and strategic risk management across diverse sectors.
Experience
Stephen advises Chinese and UK businesses on cross-border transactions, market entry, joint ventures, and regulatory compliance.
Experience
Stephen advises on cross-border fundraising across the Middle East, US, and Far East, and on negotiations and contracting with government authorities, including procurement and design services in international markets.
Experience
Please note: The experience list above may include examples of work completed prior to joining Keystone Law.
Recognised by The Legal 500 for Aviation 2022
Fellow of the Royal Aeronautical Society
“Stephen McGlennan is an exceptional multi-skilled lawyer in the domain of aviation. The breadth and depth of his expertise goes beyond legal talent; he is well connected with organisations and individuals within the global aviation sector.”
The Legal 500 2022
Stephen qualified as a solicitor in 1995. Prior to joining Keystone Law, he worked at the following firms: