Home - MML Capital

Tailored Investments

Designing investments to perfectly fit people, their unique businesses and personal aspirations

€6 bn EV realised €3.1 bn AUM

150 companies 35 countries
portfolio footprint

1988 founded 4 global offices

MML is an international mid-market private equity firm investing in partnership with management teams to deliver their bold expansion plans

We listen to your vision

We take the time to understand the key objectives of management, the business and other stakeholders

“The investment by MML marks a key milestone in the RSE growth story, providing new access to capital and confidence to pursue our ambitious plans. Our decision to partner with MML was founded on shared values and a goal to change the way water companies and industrial water users enhance their treatment processes.”

Iain McGregor, Exec Chair, RSE

We deliver a bespoke deal

We create value from original thinking, taking a fresh approach to every investment.

“We were unsure whether private equity was the right route for our ongoing expansion. However, there was a real meeting of minds with MML who persuaded us of the merits of a genuinely growth minded partner. We have not looked back.”

Nathan Bowles, CEO, Veezu

We leverage our experience

We bring over 35 years of experience and a strong international track record to every investment

“We are excited to have an investor in MML who deeply understands our sector and has tailored an investment to allow us to accelerate our growth. MML’s experience in internationalisation, M&A and scaling people-based businesses is a great fit for our own ambitions. We are already working in partnership to deliver our exciting growth plans.”

Ben Cook, CEO, Cosegic

We bring a global perspective

We have grown our business internationally, we know what it takes

“Our investor, MML Capital, has gotten right behind our strategy and gives us access to expertise, resources, and capital we didn’t have as a relatively small partnership. When you have that combination of strategic, commercial, and cultural fit, we see a kind of partnership that’s not just about expanding our reach—it’s about enhancing what we can deliver for clients globally.”

Luke Minford, CEO, Rouse

“The support we received during the investment was everything that was promised and more in terms of business transformation, acquisitions and delivering our strategic initiatives.”

Waystone

“The flexibility MML offers is ideal, allowing us to focus on managing our day-to-day business operations and continuing to act as an independent adviser.”

StoneTurn

"MML’s investment means we can continue our enviable track record of growth, by investing in the growth of our second-to-none fleet, expanding the range of ownership structures we offer our clients, and meeting our clients’ requests to expand into Europe. The combination of financial firepower and infrastructure expertise will be invaluable as we continue to drive Premier forward."

Premier Modular

"Richard and Rob have been with us at every stage of the journey, giving us the confidence to invest in our people, ahead of the rapid recovery in our core renewables markets"

Spencer Ogden

“There was a real meeting of minds with MML who persuaded us of the merits of a genuinely growth minded partner.”

Veezu

“Luke, Amar and James are dynamic, collaborative, and hands-on, when required. We are confident they are the right partner for us and we look forward to working with them to deliver our ambitious expansion plans.”

ARO

Latest news

January 2026

RTM Engineering Consultants partners with MML Capital

January 2026

GPS Group in Major €300 Million Infrastructure Refinancing

January 2026

MML Keystone acquires Coptersafety, the largest independent helicopter simulator training provider in Europe

December 2025

MML Keystone I oversubscribed in $1bn debut raise

MML Capital’s Keystone I surpassed expectations with a €935m ($1.1bn) oversubscribed debut, underscoring investor confidence in its innovative private equity strategy blending growth, resilience, and infrastructure alignment.