Castellum AB (publ) is a Sweden‐based real estate company specializing in the ownership, management and development of commercial properties. The company’s portfolio comprises office buildings, logistics facilities and retail assets, with a focus on high‐quality urban and suburban locations. Established in 1994, Castellum has built a reputation for long‐term asset management and strategic property acquisitions across the Nordic region.
At the core of Castellum’s operations are property acquisition, active asset management and development projects aimed at enhancing tenant value and sustainability performance. The company offers comprehensive leasing services for a diverse tenant base, including corporate occupiers, public sector bodies and retail operators. In addition, Castellum manages ongoing maintenance, energy optimization and refurbishment projects to ensure that its properties meet modern environmental and operational standards.
Castellum’s primary market is Sweden, with significant holdings in major metropolitan areas such as Stockholm, Gothenburg and Malmö. In recent years, the company has expanded its footprint into neighboring Nordic markets, including Denmark and Finland, seeking to capitalize on regional urban growth and demand for sustainable commercial space. This geographic diversification complements Castellum’s deep local expertise and facilitates integrated property management across multiple jurisdictions.
Under the leadership of CEO Johan Birgersson, Castellum has continued to pursue a strategic growth agenda centered on sustainable development and tenant‐focused services. The company’s board and executive team include seasoned professionals in real estate investment, finance and corporate governance. Castellum remains committed to delivering stable rental income and long‐term value creation for its stakeholders through disciplined portfolio management and a strong emphasis on environmental responsibility.
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