Investing in the future of global defence and security.
Sumner Capital Management – a specialised UK-based Private Equity Fund investing in the global defence market.
Strategic Capital for a Safer Future
The Fund is designed to:
-
improve national defence capabilities for the UK, US, NATO and partner nations; and
-
accelerate dual-use and emerging technologies with defence applications by enabling SME firms' better access to the wider global defence market.
The Fund is established to invest in innovative, high-potential companies operating within or adjacent to the defence, national security and aerospace sectors.
We aim to generate competitive long-term returns for investors while supporting national defence resilience, technological advancement, and strategic autonomy.
01
Dedicated Private Equity Fund
For investment in innovative solutions in lethal and non-lethal capabilities and dual-use technologies, Sumner Capital can support diversification of your investment strategy.
02
Diversified Portfolio
The Portfolio is diversified across five specific sectors with a global perspective, in a range of deal sizes and vintages.
03
Dynamic Investment Strategy
Strategies are delivered through direct deals, co-investment and segregated mandates.
04
Experienced Leadership
The team consists of senior military and experienced fund management leadership, ensuring optimal product acquisition and portfolio management.
About Us
Who We Are
Sumner Capital is a UK specialised private equity fund investing in the global defence market. It is a ‘ten-year plus two’ closed-ended fund that seeks to fill the gap at the lower to mid-market level in the defence, security and aerospace sectors.
The growth strategy is to develop the platform across multiple channels and sequentially raise funds in multiple phases.
What We Do
Our specialised Fund provides access to a diversified global portfolio of high-quality companies seeking to generate attractive returns and achieve capital growth in a responsible manner over a 10-year period.
The Fund invests in established mid-market companies in the global defence market with proven business models and clear potential for accelerated growth through acquiring minority equity stakes, buy-out as the majority equity shareholder, early stage/venture investments where technology is deemed exceptional, and in the provision of short-term private credit.
Backed by Expertise, Driven by Purpose
Sumner Capital brings together defence sector specialists, experienced fund managers, and a track record of managing complex and mission-aligned investments.
We operate with institutional discipline, national purpose, and a long-term horizon, investing where capital can make the greatest impact.
We have exceptional knowledge and experience of the national security and defence sectors facilitating capability development and scale-up leading to better outcomes.
Portfolio Development
Portfolios are aligned to the UK’s Strategic Defence Review capability requirements which are relevant for NATO and allied partners, enabling the transfer of IP across allied nations.
Led by experts in their field with the remit to identify novel core and dual-use technologies and capabilities that meet the Fund’s proposition and investment mandate.
We support founders and executive teams grow their businesses across 5 sectors:
-
Maritime systems
-
Land systems
-
Air and Space Systems
-
AI, Cyber, Electromagnetic and Emerging Technologies
-
Home Resilience and Manufacturing
Whether you are an institutional investor seeking access to a high-conviction thematic fund, or a company delivering transformative capabilities in the defence space - we invite you to partner with us.
