Why maincubes Secured €2.5bn for German Data Centre Growth

maincubes has secured €2.475bn (US$2.8bn) in long-term platform financing to accelerate the expansion of its German data centre footprint as demand for cloud AI and mission-critical digital infrastructure continues to rise.

The Frankfurt-based operator, which is majority-owned by investment firm DTCP, said the financing significantly strengthens its capital base and supports the next phase of growth across its European portfolio. The transaction positions maincubes to advance multiple large-scale developments while refinancing its existing estate.

The financing package comprises €1.775bn ($US2.1bn) in committed facilities alongside a further €700m ($US 815.8m) uncommitted accordion. 

Funding has been provided by a consortium of eleven banks and one institutional fund, reflecting broad lender confidence in the company’s strategy and operating model.

Scaling capacity in core German markets

The capital will be deployed across a series of projects designed to increase capacity in Germany’s most important data centre markets. This includes the construction of maincubes’ fourth Frankfurt facility, FRA04, alongside the development of its new 200MW Berlin campus, known as mainHub.

In addition to these flagship developments, the financing will also support expansion options and continued growth at existing operational sites. 

Once fully built out, the platform is expected to reach approximately 400MW, placing maincubes among the largest and fastest-growing data centre operators in Germany.

The company’s portfolio is focused on highly secure and resilient facilities designed to support cloud service providers, AI-driven workloads and public-sector customers. This positioning reflects increasing demand for sovereign, high-performance infrastructure capable of meeting strict regulatory and availability requirements.

Responding to cloud and AI demand

According to maincubes, the new capital structure provides a robust foundation to scale its operations in line with accelerating digitalisation across Europe. 

Demand from hyperscalers and enterprise customers continues to grow as organisations deploy AI applications and migrate critical workloads to the cloud.

The operator’s emphasis on sustainability and energy efficiency is also central to its growth plans. New developments are designed to align with stringent environmental standards, a key consideration for customers seeking to reduce the carbon footprint of their digital infrastructure.

The breadth of lender participation highlights market conviction in maincubes’ ability to source, develop and operate large-scale assets in core European markets. It also underlines confidence in the long-term outlook for the data centre sector as data volumes and compute requirements expand.

Oliver Menzel, Founder and CEO of maincubes, says:“This financing marks a major milestone for maincubes. It provides us with financial strength and ability to accelerate our growth, bringing large-scale developments to market for our core customer base. 

“It also underscores our position as Germany’s leading data centre operator for Cloud and AI workloads for a truly international customer base and the public sector.”

Backing from DTCP and lenders

DTCP, which holds a majority stake in the business, said the transaction reflects how far the platform has progressed in recent years. The firm highlighted the collaborative approach taken with lenders to support long-term growth

Waldemar Maurer, Partner, DTCP, says: “This successful financing clearly demonstrates how far maincubes has developed in recent years. 

“We are grateful to both existing and new lenders for their trust and support and we are fully committed to continuing to nurture and grow the platform together with the management team.”

Tim Hofmann, Principal, DTCP, adds: “This financing enhances maincubes’ financial flexibility and underpins its long-term growth. The breadth of lender support validates the company’s development and future trajectory.”

maincubes was advised on the transaction by RBC Capital Markets and A&O Shearman, while the financing consortium was advised by Hogan Lovells.