Partners Capital Taps Co-Investment Boom with $1B+ Merlin IV Fund

BOSTON & LONDON – February 11, 2026 – Global investment firm Partners Capital has successfully closed its latest private equity co-investment fund, Merlin IV, securing over $1 billion in commitments. The close marks a significant milestone for the firm, which manages over $70 billion in assets, and underscores a powerful shift in the private equity landscape where investors are increasingly seeking direct participation in deals.

The new fund is the fourth and largest in the firm’s Merlin co-investment series, which first launched in 2019. It attracted a diverse group of global family offices and institutional investors from North America, Europe, Asia, and Africa, signaling widespread confidence in a strategy that promises both speed and certainty for private equity managers navigating a complex market.

The Co-Investment Advantage

The overwhelming success of the Merlin IV fundraise is a direct reflection of a larger market trend: the surging popularity of co-investments. For years, limited partners (LPs) primarily accessed private equity through blind-pool funds, committing capital with limited say over individual deals. Today, sophisticated investors are demanding more. Co-investments offer a compelling alternative, providing a direct line of sight into specific companies, greater control over capital deployment, and, crucially, a more favorable fee structure that can significantly enhance net returns.

This model allows investors to bypass some of the traditional management and performance fees associated with fund investing, making it an economically attractive proposition. Furthermore, it enables LPs to deploy larger checks into high-conviction opportunities, concentrating capital in assets they find most promising. Partners Capital has effectively tapped into this demand, positioning its Merlin platform as a premier vehicle for clients seeking these benefits.

“This exciting milestone reflects our ability to source distinctive co-investment opportunities for our clients,” said Arjun Raghavan, Global CEO of Partners Capital, in a statement. “Our firm built the Merlin platform by being a trusted, agile partner to leading managers, and this close shows that approach delivers value.” By acting as an aggregator and expert underwriter, the firm provides its clients—which include prominent endowments, foundations, and families—with curated access to deals that would otherwise require extensive in-house diligence teams.

Fueling the Competitive Middle Market

While the appeal for investors is clear, the Merlin IV fund is engineered to be equally attractive to private equity general partners (GPs), particularly those operating in the fiercely competitive lower-middle and middle-market buyout space. This segment is characterized by a high volume of opportunities but also by compressed transaction timelines and intense competition, which places a premium on reliable and swift financing.

Merlin IV is designed to be a strategic solution to this challenge. The fund typically invests between $25 million and over $100 million per transaction, providing a substantial capital injection alongside lead private equity sponsors. This allows GPs to pursue larger targets than their own funds might permit, syndicate risk, and close deals with greater confidence.

The firm's strategy goes beyond simply providing passive capital. “Merlin IV underscores the scale we bring to the co-investment market and our ability to partner more deeply with sponsors," commented Adam Spence, Head of Co-Investments at Partners Capital. "By acting as a co-lead investor or co-underwriter, we can support transactions with meaningful, reliable capital and be a scaled partner of choice for high-quality managers.”

This proactive stance is critical. It transforms Partners Capital from a simple capital source into a strategic ally for PE firms. The ability to underwrite a significant portion of the equity check provides the certainty sellers demand and gives the lead sponsor a powerful advantage in auctions. It also helps build durable relationships that extend beyond a single transaction.

"At the core of our approach is being a constructive partner across a private equity manager’s lifecycle, not as a one-time source of capital,” added Jennifer Fox Bensimon, Managing Director of Co-Investments. This focus on building long-term relationships is aimed at securing a steady pipeline of high-quality deal flow from a network of trusted managers.

A Global Stamp of Approval

The geographic diversity of Merlin IV's investor base is a testament to the global appeal of both private equity as an asset class and Partners Capital's specific strategy. With commitments flowing in from institutions and family offices across four continents, the fundraise highlights the worldwide search for returns in an environment of market volatility and low interest rates.

For many international investors, co-investment vehicles like Merlin IV offer an efficient pathway to gain exposure to the dynamic North American and European middle markets, where the majority of these buyouts are executed. It allows them to tap into the deal-sourcing and due diligence expertise of a seasoned firm like Partners Capital, which maintains a global presence with eight offices in key financial hubs including Boston, London, New York, and Singapore.

This global network not only helps in fundraising but also provides a broad perspective on market trends and opportunities, enriching the firm's investment selection process. The successful close demonstrates that investors worldwide are increasingly comfortable with and actively seeking out sophisticated partnership models that offer a blend of access, alignment, and enhanced economics.

Reshaping the Deal Landscape

With over $1 billion in fresh capital, Merlin IV is poised to be a significant force in the middle-market M&A landscape. Since its inception in 2019, the Merlin platform has already deployed over $2 billion across more than 60 transactions, establishing a formidable track record. The addition of this new, larger fund will amplify its impact.

The availability of such a large, dedicated pool of co-investment capital provides a crucial lubricant for the deal-making machine. It empowers private equity firms to execute their strategies with greater ambition, knowing a reliable partner is ready to step in with significant equity. This can lead to an increase in overall deal volume and allows sponsors to compete more effectively for high-quality assets.

However, this influx of capital also contributes to an already competitive environment, potentially putting upward pressure on company valuations. As more capital chases a finite number of attractive buyout targets, sellers may find themselves in a stronger negotiating position. For GPs, the key to success in this environment will be their ability to forge strong alliances with capital partners like Partners Capital, leveraging these relationships to gain an edge in speed and certainty of execution. The continued growth of large-scale co-investment platforms signals an evolution in private equity, moving toward a more collaborative and syndicated model where strategic partnerships are paramount to completing successful transactions.