Swedish real estate company Castellum announced the sale of its coworking subsidiary United Spaces to competitor iOffice on October 27, 2025, with finalization expected in Q4 2025. The transaction will boost Castellum's annual earnings by approximately €2.74M and enables the property owner to refocus on core office and logistics real estate operations across Nordic cities.

United Spaces, founded in 2000 as one of Sweden's pioneering coworking operators and fully acquired by Castellum in 2019, operates 10 locations and generated stable revenues of approximately €23M in 2024. The acquisition will double iOffice's Swedish location count, with iOffice CEO Homan Tehrani scheduled to speak at the Coworking Europe 2025 conference in Berlin on November 19-20.