# CASTELLUM AB

Summary updated: 2026-10-04T15:12:13.254997Z
Canonical: https://finbar.com/research/companies/castellum-ab

## Overview

Castellum AB is a commercial property owner, investor and developer. Its business focuses on investing in and developing commercial premises, with a stated mission of “Creating workplaces where people and enterprises thrive.” [1](https://app.finbar.com/go?id=P140078441)[2](https://app.finbar.com/go?id=P140078439) Its portfolio is principally in Sweden’s growth cities, with properties also in Copenhagen and Helsinki and exposure to Norway through associated company Entra. The portfolio includes offices, public-sector properties, warehouses and light industrial premises, as well as retail. [3](https://app.finbar.com/go?id=P139825761)[4](https://app.finbar.com/go?id=P140078446)

At 30 June 2026, Castellum reported 655 investment properties covering 5.156 million square metres. [5](https://app.finbar.com/go?id=T15979874) For FY2025, rental and service income was SEK 9,593 million, and the company reported 485 employees at year-end. [6](https://app.finbar.com/go?id=T16016993)[7](https://app.finbar.com/go?id=T16017017)
[1](https://app.finbar.com/go?id=P140078441)[2](https://app.finbar.com/go?id=P140078439)[3](https://app.finbar.com/go?id=P139825761)[4](https://app.finbar.com/go?id=P140078446)[5](https://app.finbar.com/go?id=T15979874)[6](https://app.finbar.com/go?id=T16016993)[7](https://app.finbar.com/go?id=T16017017)

## Products & services

Castellum’s products are commercial spaces including offices, public-sector properties, warehouses and light-industrial and retail premises. Its logistics offer spans large central warehouses through to last-mile locations. The company also provides property management, leasing, new construction, renovation and tenant-specific adaptations. [8](https://app.finbar.com/go?id=P140080281)[9](https://app.finbar.com/go?id=P140078903)[10](https://www.castellum.se/fastigheter/)[11](https://www.castellum.se/logistikerbjudande/)

Services for tenants include local property-team support, service requests and fault reporting, and help with adaptations. Castellum also offers furnished serviced offices and coworking through United Spaces, alongside flexible workspace options. [12](https://app.finbar.com/go?id=P140078844)[13](https://app.finbar.com/go?id=T16017109)[14](https://www.castellum.se/hyresgastservice/)[15](https://www.castellum.se/hyresgastservice/husteam/)[16](https://www.castellum.se/kontorserbjudande/)[17](https://www.castellum.se/lediga-lokaler/coworking-och-kontorshotell/)

Technical and environmental features include solar PV systems and charging stations; Castellum reported installing 130 PV systems with more than 23 MW of capacity during 2020–2025 and generating 15,609 MWh from its own PV systems in 2025. [18](https://app.finbar.com/go?id=P140079134)[19](https://app.finbar.com/go?id=P140079224) The 2025 annual report lists certifications including Miljöbyggnad, LEED, BREEAM, WELL and NollCO2; certified buildings represented 58% of total property area at year-end 2025. This is a portfolio certification measure, not a share of financial performance. [20](https://app.finbar.com/go?id=T16017055) The reviewed reporting does not provide revenue or performance percentages by property type. [8](https://app.finbar.com/go?id=P140080281)[13](https://app.finbar.com/go?id=T16017109)
[8](https://app.finbar.com/go?id=P140080281)[9](https://app.finbar.com/go?id=P140078903)[10](https://www.castellum.se/fastigheter/)[11](https://www.castellum.se/logistikerbjudande/)[12](https://app.finbar.com/go?id=P140078844)[13](https://app.finbar.com/go?id=T16017109)[14](https://www.castellum.se/hyresgastservice/)[15](https://www.castellum.se/hyresgastservice/husteam/)[16](https://www.castellum.se/kontorserbjudande/)[17](https://www.castellum.se/lediga-lokaler/coworking-och-kontorshotell/)[18](https://app.finbar.com/go?id=P140079134)[19](https://app.finbar.com/go?id=P140079224)[20](https://app.finbar.com/go?id=T16017055)[10](https://www.castellum.se/fastigheter/)[11](https://www.castellum.se/logistikerbjudande/)[14](https://www.castellum.se/hyresgastservice/)[15](https://www.castellum.se/hyresgastservice/husteam/)[16](https://www.castellum.se/kontorserbjudande/)[17](https://www.castellum.se/lediga-lokaler/coworking-och-kontorshotell/)

## Geographic presence

Castellum’s direct property operations are concentrated in Sweden, with additional portfolios in Finland and Denmark. Its Swedish regions are Stockholm, West, Central, Mälardalen and Öresund; the company also identifies Copenhagen and Helsinki among its growth-city markets. Castellum reports Norway exposure through its associated company Entra. [3](https://app.finbar.com/go?id=P139825761)[21](https://app.finbar.com/go?id=P140078738)

In H1 2026, property income totaled SEK 4,449 million. By reported portfolio region, income was Stockholm SEK 1,177 million (26.5%), West SEK 885 million (19.9%), Central SEK 861 million (19.4%), Mälardalen SEK 631 million (14.2%), Öresund SEK 477 million (10.7%), Finland SEK 300 million (6.7%) and Denmark SEK 118 million (2.7%). The five Swedish regions together represented about 90.6% of the total; these percentages are calculated from reported property-income figures and are not a separate breakdown of consolidated group revenue. [5](https://app.finbar.com/go?id=T15979874)

Castellum lists head offices in Gothenburg and Stockholm, and offices in Helsinki and Copenhagen. At year-end 2025, associated company Entra’s property-management portfolio covered Oslo, Bergen/Stavanger, Sandvika and Drammen in Norway. [22](https://www.castellum.se/kontakta-oss/vara-kontor/huvudkontor/)[23](https://castellum.fi/en/contact-information/)[24](https://www.castellum.dk/kontakt-os/)[25](https://app.finbar.com/go?id=T16017153)
[3](https://app.finbar.com/go?id=P139825761)[21](https://app.finbar.com/go?id=P140078738)[5](https://app.finbar.com/go?id=T15979874)[25](https://app.finbar.com/go?id=T16017153)[22](https://www.castellum.se/kontakta-oss/vara-kontor/huvudkontor/)[23](https://castellum.fi/en/contact-information/)[24](https://www.castellum.dk/kontakt-os/)

## Business segments

Castellum reports geographic operating segments. Its six active segments in the first half of 2026 were Stockholm; West, covering Greater Gothenburg including Borås; Central, covering Örebro, Linköping, Norrköping, Jönköping and Växjö; Mälardalen, covering Uppsala and Västerås; Öresund, covering Malmö, Lund, Helsingborg and Copenhagen; and Finland. The company says its segments are largely identified by geographical area of activity. [26](https://app.finbar.com/go?id=P140080264)[27](https://app.finbar.com/go?id=P140080265)[28](https://app.finbar.com/go?id=T15979858) Coworking was previously reported as a separate business segment, but was eliminated after the United Spaces divestment in 2025; it is not an active segment in the 2026 H1 results. [29](https://app.finbar.com/go?id=P139825697)[28](https://app.finbar.com/go?id=T15979858)

For January–June 2026, net operating income was SEK 3,215 million in total. Approximate contributions to that total were Stockholm SEK 841 million (26.2%), West SEK 720 million (22.4%), Central SEK 614 million (19.1%), Mälardalen SEK 410 million (12.7%), Öresund SEK 465 million (14.5%), and Finland SEK 165 million (5.1%). Percentages are calculated from reported segment net operating income. [28](https://app.finbar.com/go?id=T15979858)
[26](https://app.finbar.com/go?id=P140080264)[27](https://app.finbar.com/go?id=P140080265)[29](https://app.finbar.com/go?id=P139825697)[28](https://app.finbar.com/go?id=T15979858)[28](https://app.finbar.com/go?id=T15979858)[28](https://app.finbar.com/go?id=T15979858)[28](https://app.finbar.com/go?id=T15979858)[28](https://app.finbar.com/go?id=T15979858)[28](https://app.finbar.com/go?id=T15979858)[28](https://app.finbar.com/go?id=T15979858)

## Company history

Castellum’s documented corporate history includes the formation of its A shares on 27 October 1993; the company went public in 1997, when its shares were listed on Nasdaq Stockholm. [30](https://app.finbar.com/go?id=P140217853)[31](https://www.castellum.se/investerare/)

In 2015–2016, Castellum expanded through property acquisitions, including Henry Ståhl Fastigheter and the remaining shares in CORHEI, formerly Henry Ståhl Fastigheter. [32](https://news.cision.com/castellum/r/castellum-and-heimstaden-enter-into-major-transaction-totalling-sek-2-4-billion%2Cc2110273)[33](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-fullfoljer-affaren-i-norrkoping-och-linkoping-koper-aterstoden-av-gamla-stahls-6bc6dea2) In 2016, it also acquired Norrporten, a major portfolio expansion. [34](https://www.castellum.se/media/pressmeddelanden/pressmeddelande?slug=castellum-forvarvar-norrporten-samt-genomfor-foretradesemission-och-riktad-emission-till-andra-och-sjatte-ap-fonden-d3a50f7f)[35](https://www.castellum.se/media/pressmeddelanden/pressmeddelande?slug=castellum-tilltrader-norrporten-och-beslutar-om-apportemission-och-overlatelse-av-aterkoppta-aktier-0961105c)

In 2020–2021, Castellum proposed a combination with Norwegian property company Entra and later withdrew its offer; it nevertheless held 33.3% of Entra at the end of 2021. [36](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-lamnar-ett-utbytes-och-kontanterbjudande-till-entras-aktieagare-i-syfte-att-bolagen-ska-ga-samman-9d22f1a8)[37](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-drar-tillbaka-det-frivilliga-utbytes-och-kontanterbjudandet-att-forvarva-samtliga-utestaende-aktier-i-entra-asa-c20d3bb8)[38](https://app.finbar.com/go?id=P140211781) In a separate major transaction, Kungsleden became a Castellum subsidiary in November 2021, and Castellum completed its acquisition of the remaining shares in 2022. [39](https://www.castellum.se/investerare/forvarv-och-emissioner/budet-pa-kungsleden/)[40](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-abs-dotterbolag-kungsleden-ab-har-idag-offentliggjort-en-kallelse-till-fordringshavarmote-under-sitt-mtn-program-for-att-begara-samtycke-till-att-castellum-ab-ersatter-kungsleden-som-emittent)
[30](https://app.finbar.com/go?id=P140217853)[38](https://app.finbar.com/go?id=P140211781)[31](https://www.castellum.se/investerare/)[32](https://news.cision.com/castellum/r/castellum-and-heimstaden-enter-into-major-transaction-totalling-sek-2-4-billion%2Cc2110273)[33](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-fullfoljer-affaren-i-norrkoping-och-linkoping-koper-aterstoden-av-gamla-stahls-6bc6dea2)[34](https://www.castellum.se/media/pressmeddelanden/pressmeddelande?slug=castellum-forvarvar-norrporten-samt-genomfor-foretradesemission-och-riktad-emission-till-andra-och-sjatte-ap-fonden-d3a50f7f)[35](https://www.castellum.se/media/pressmeddelanden/pressmeddelande?slug=castellum-tilltrader-norrporten-och-beslutar-om-apportemission-och-overlatelse-av-aterkoppta-aktier-0961105c)[36](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-lamnar-ett-utbytes-och-kontanterbjudande-till-entras-aktieagare-i-syfte-att-bolagen-ska-ga-samman-9d22f1a8)[37](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-drar-tillbaka-det-frivilliga-utbytes-och-kontanterbjudandet-att-forvarva-samtliga-utestaende-aktier-i-entra-asa-c20d3bb8)[39](https://www.castellum.se/investerare/forvarv-och-emissioner/budet-pa-kungsleden/)[40](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-abs-dotterbolag-kungsleden-ab-har-idag-offentliggjort-en-kallelse-till-fordringshavarmote-under-sitt-mtn-program-for-att-begara-samtycke-till-att-castellum-ab-ersatter-kungsleden-som-emittent)

## Sources

1. [CASTELLUM AB — Full financial report (2025 Y), p6](https://app.finbar.com/go?id=P140078441)
2. [CASTELLUM AB — Full financial report (2025 Y), p6](https://app.finbar.com/go?id=P140078439)
3. [CASTELLUM AB — Partial financial report (2026 H 1), p11](https://app.finbar.com/go?id=P139825761)
4. [CASTELLUM AB — Full financial report (2025 Y), p7](https://app.finbar.com/go?id=P140078446)
5. [CASTELLUM AB — Partial financial report (2026 H 1), p12](https://app.finbar.com/go?id=T15979874)
6. [CASTELLUM AB — Full financial report (2025 Y), p11](https://app.finbar.com/go?id=T16016993)
7. [CASTELLUM AB — Full financial report (2025 Y), p31](https://app.finbar.com/go?id=T16017017)
8. [CASTELLUM AB — Full financial report (2025 Y), p124](https://app.finbar.com/go?id=P140080281)
9. [CASTELLUM AB — Full financial report (2025 Y), p35](https://app.finbar.com/go?id=P140078903)
10. [www.castellum.se](https://www.castellum.se/fastigheter/)
11. [www.castellum.se](https://www.castellum.se/logistikerbjudande/)
12. [CASTELLUM AB — Full financial report (2025 Y), p34](https://app.finbar.com/go?id=P140078844)
13. [CASTELLUM AB — Full financial report (2025 Y), p123](https://app.finbar.com/go?id=T16017109)
14. [www.castellum.se](https://www.castellum.se/hyresgastservice/)
15. [www.castellum.se](https://www.castellum.se/hyresgastservice/husteam/)
16. [www.castellum.se](https://www.castellum.se/kontorserbjudande/)
17. [www.castellum.se](https://www.castellum.se/lediga-lokaler/coworking-och-kontorshotell/)
18. [CASTELLUM AB — Full financial report (2025 Y), p53](https://app.finbar.com/go?id=P140079134)
19. [CASTELLUM AB — Full financial report (2025 Y), p58](https://app.finbar.com/go?id=P140079224)
20. [CASTELLUM AB — Full financial report (2025 Y), p67](https://app.finbar.com/go?id=T16017055)
21. [CASTELLUM AB — Full financial report (2025 Y), p31](https://app.finbar.com/go?id=P140078738)
22. [www.castellum.se](https://www.castellum.se/kontakta-oss/vara-kontor/huvudkontor/)
23. [castellum.fi](https://castellum.fi/en/contact-information/)
24. [www.castellum.dk](https://www.castellum.dk/kontakt-os/)
25. [CASTELLUM AB — Full financial report (2025 Y), p140](https://app.finbar.com/go?id=T16017153)
26. [CASTELLUM AB — Full financial report (2025 Y), p123](https://app.finbar.com/go?id=P140080264)
27. [CASTELLUM AB — Full financial report (2025 Y), p123](https://app.finbar.com/go?id=P140080265)
28. [CASTELLUM AB — Partial financial report (2026 H 1), p5](https://app.finbar.com/go?id=T15979858)
29. [CASTELLUM AB — Partial financial report (2026 H 1), p5](https://app.finbar.com/go?id=P139825697)
30. [CASTELLUM AB — Full financial report (2020 Y), p148](https://app.finbar.com/go?id=P140217853)
31. [www.castellum.se](https://www.castellum.se/investerare/)
32. [news.cision.com](https://news.cision.com/castellum/r/castellum-and-heimstaden-enter-into-major-transaction-totalling-sek-2-4-billion%2Cc2110273)
33. [www.castellum.se](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-fullfoljer-affaren-i-norrkoping-och-linkoping-koper-aterstoden-av-gamla-stahls-6bc6dea2)
34. [www.castellum.se](https://www.castellum.se/media/pressmeddelanden/pressmeddelande?slug=castellum-forvarvar-norrporten-samt-genomfor-foretradesemission-och-riktad-emission-till-andra-och-sjatte-ap-fonden-d3a50f7f)
35. [www.castellum.se](https://www.castellum.se/media/pressmeddelanden/pressmeddelande?slug=castellum-tilltrader-norrporten-och-beslutar-om-apportemission-och-overlatelse-av-aterkoppta-aktier-0961105c)
36. [www.castellum.se](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-lamnar-ett-utbytes-och-kontanterbjudande-till-entras-aktieagare-i-syfte-att-bolagen-ska-ga-samman-9d22f1a8)
37. [www.castellum.se](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-drar-tillbaka-det-frivilliga-utbytes-och-kontanterbjudandet-att-forvarva-samtliga-utestaende-aktier-i-entra-asa-c20d3bb8)
38. [CASTELLUM AB — Full financial report (2021 Y), p130](https://app.finbar.com/go?id=P140211781)
39. [www.castellum.se](https://www.castellum.se/investerare/forvarv-och-emissioner/budet-pa-kungsleden/)
40. [www.castellum.se](https://www.castellum.se/media/pressmeddelanden/pressmeddelande/?slug=castellum-abs-dotterbolag-kungsleden-ab-har-idag-offentliggjort-en-kallelse-till-fordringshavarmote-under-sitt-mtn-program-for-att-begara-samtycke-till-att-castellum-ab-ersatter-kungsleden-som-emittent)

AI-generated summary; may contain errors. Not investment advice. Sign up to Finbar to view original document sources and access worldwide fundamental financial data and intelligence.