Solid Foundation & Strong Expertise
Solid Leaders as Shareholders
Stonefort Group is a wholly owned subsidiary of HOCHTIEF AG, a leader in global construction, headquartered in Germany.
HOCHTIEF itself is majority owned by ACTIVIDADES DE CONSTRUCCIÓN Y SERVICIOS, S.A., (ACS Group), headquartered in Madrid and a global leader in infrastructure development.
This solid shareholder backing gives Stonefort Group stability and strength to serve both internal and external clients with confidence and long-term commitment.
Our Group Vision
At Stonefort Group our vision is to operate as the center of excellence in insurance risk management and procurement for ACS Group overall, while continuing to serve third-party clients with the same discipline and relevance.
At Stonefort Re, we believe that reinsurance is not just a financial tool but a long-term enabler of performance, stability, and resilience.
We are grounded in decades of underwriting expertise and backed by a stable shareholder structure and our significant group business, but we continue diversifying our third-party client activities across new geographies and business segments.
We aim to balance the strength of our internal heritage with a responsible, focused and sound external growth strategy — driven by technical rigor, pragmatic execution, and long-term partnerships to facilitate a broader portfolio diversification.
Strategic Pillars (former Reinsurance Core)
At Stonefort Group, our strategic direction is built around four core pillars that reflect both our internal responsibilities and our external ambitions. These pillars guide the way we structure our operations, support our ecosystem, and engage with the market.
- Group Alignment – Supporting the business needs of ACS Group and its subsidiaries HOCHTIEF and Turner through tailored reinsurance solutions.
Most relevant is the close collaboration with Turner, providing significant reinsurance for their embedded insurance solutions, enhancing competitiveness during construction project offer and bidding phase.
- Best Practice Enablement – We act as a center of excellence and internal consultant across the ACS Group ecosystem for insurance risk management topics, aiming to implement structured, globally coordinated and integrated insurance programs.
Our goal: to enable optimized and efficient risk transfer to traditional insurance and reinsurance markets — aligned with operational realities and evolving exposures.
- Third-Party Development – Growing our external client base with discipline, focusing on continuity and long-term partnerships where our expertise and financial strength creates tangible value.
We leverage our technical excellence by maintaining high standards in underwriting, claims management,compliance, and operational execution — across all our activities.
- Capital Optimization & Investment Performance – Using our capital efficiently to balance protection, performance, and sustainability over time. In addition to underwriting returns, our Stonefort Multi-Asset Fund (SMAF) contributes significantly to our overall results through consistent capital gains and long-term value creation.
These pillars define how we operate, how we grow, and how we are remaining a trusted partner — within the Group and across the broader market.
Our Shareholders
Stonefort Group is a wholly owned subsidiary of HOCHTIEF AG, a leader in global construction, headquartered in Germany.
HOCHTIEF itself is majority owned by ACS Group, headquartered in Madrid and a global leader in infrastructure development.
This solid shareholder backing gives Stonefort Group stability and strength to serve both internal and external clients with confidence and long-term commitment.
Company structure
Responsibility and Contribution within the wider Group
As part of ACS and HOCHTIEF, Stonefort Group plays a key role in the Group’s insurance risk management strategy — acting as a centralized platform and advisor to support risk transfer, capital protection, and regulatory consistency across entities.
Our contribution goes clearly beyond pure capacity allocation for the group. We deliver expertise, structure, continuity, and technical insight across several key areas:
- Structured and Embedded Reinsurance: providing tailored reinsurance solutions to optimize the Group’s insurance architecture and support the business operations and their competitiveness with a strong focus on US construction projects.
- Centralized P&C Insurance Procurement: as a Center of Excellence for insurance risk management we support the design and implementation of global and regional insurance programstailored to the operational reality of the Group’s activities.
- Employee-Related Programs: facilitating the design and roll out of a Global Benefits Management to enhance transparency, improve governance and compliance, ensure policy consistency across geographies to better protect and assist our employees.
- Governance & Regulatory Alignment: Ensuring compliance with regulatory frameworks and promoting a risk-aware culture across all operational levels.
Through these functions, Stonefort Group acts as a trusted enabler — translating strategic risk priorities into actionable, coherent, and sustainable insurance solutions for the benefit of the entire Group.