Castellum
Castellum is one of Sweden's largest real estate companies, managing a diverse portfolio valued at SEK 89.2 billion, which includes office, warehousing, logistics, and public sector properties across a total leasable area of 4.2 million square meters. The company operates in 20 cities in Sweden, as well as in Copenhagen and Helsinki, emphasizing a decentralized management structure that ensures a strong local presence. Castellum is recognized for its sustainability initiatives, having received awards for its efforts, including being ranked first globally in the offices-and-logistics sector by GRESB and achieving the Level Gold award from the European Public Real Estate Association for sustainability reporting. It is also the only Nordic real estate and construction firm included in the Dow Jones Sustainability Index, signifying its commitment to sustainability. Castellum's business model focuses on developing and renting properties, with investments in new construction, extensions, reconstructions, and acquisitions aimed at enhancing property density and quality while maintaining low financial risk.
Top Stages
3 past transactions
Entra
Post in 2025
Entra is a prominent real estate company based in Norway, specializing in the ownership, development, and management of office properties. The company's portfolio is predominantly concentrated in Oslo and its surrounding areas, including Bergen, Stavanger, Drammen, and Trondheim. Entra's properties are known for their environmental standards and flexibility, catering primarily to the public sector, which constitutes the majority of its tenants. Rental income is the primary source of the company's operating revenue, supplemented by property appreciation and sales. Notably, properties located in Oslo represent over half of Entra's total portfolio value and are a significant contributor to its rental income.
Specialty Systems
Acquisition in 2021
SSI is an Information Systems and Engineering Services consulting firm that specializes in the delivery of technical services and customized software solutions for customers in both the private and federal/state/local government markets.
MFSI Government Group
Acquisition in 2021
MFSI Government Group is a provider of engineering and analysis services focused on supporting the U.S. armed forces and federal agencies. The company specializes in delivering mission-critical solutions related to national security and warfighter support. MFSI Government Group assists in reviewing and analyzing the requirements, functions, and elements of various projects, facilities, and services, ensuring that the needs of its clients are effectively met in the context of national defense and security operations.
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