What Castellum Corporate does

Castellum AB (publ) is a Swedish commercial property company that owns, manages, and develops commercial real estate across growth cities in Sweden, Denmark, and Finland. Listed on Nasdaq Stockholm Large Cap since 1997 and headquartered in Gothenburg, the company operated a property portfolio valued at approximately SEK 134 billion as of 30 June 2026, structured through six regional entities (Mitt, Stockholm, Väst, Öresund, Mälardalen, plus the integrated Kungsleden subsidiary). Castellum serves B2B tenants across commercial office, logistics and warehouse, and retail segments via individually negotiated leases, with anchor relationships including Ericsson in the Hagastaden / Infinity project.

The company's core offerings include flexible office solutions (coworking, managed offices, and fully customized workspaces), logistics and warehouse facilities ranging from 30 to over 30,000 sqm, new construction and redevelopment projects, and tenant support services. Properties are built and operated to multiple sustainability certifications — Miljöbyggnad (Gold for new constructions), LEED O+M (Gold), BREEAM In-Use, WELL, and NollCO2 — with 58% of the portfolio certified and 72% meeting an energy-performance threshold below 100 kWh/sq.m. per year. Castellum also operates the '100 on Solar' initiative (130 PV installations installed as of 2025, targeting 200 by 2030) and a Power Strategy Partnership with five Swedish energy companies to convert buildings into active grid resources through demand-response capabilities. Annual proprietary research includes the sixth edition of the 'Working Life of the Future' trend report, surveying 4,000+ Nordic office workers.

Castellum generates revenue primarily through recurring commercial property rental income, with H1 2026 income of SEK 4,741M, net operating income of SEK 3,215M, and income from property management of SEK 2,301M. Pricing is set through individually negotiated B2B leases based on property type, location, size, and lease terms, billed annually. Distribution is executed through direct property leasing via regional offices, self-service property search portals (castellum.se, castellum.dk, castellum.fi), and direct transactions with institutional investors for portfolio acquisitions and divestments. In 2026 the company underwent significant portfolio reshuffling, announcing approximately SEK 24 billion in non-core divestments (95 Skåne properties to Wihlborgs for SEK 13.3Bn and two Stockholm offices to Alecta for SEK 5.0Bn) while initiating a SEK 3.0Bn share buyback programme.

Name

Castellum Corporate

Legal name

Castellum AB (publ)

Website

https://corallen.se

Company type

Public

Founded year

1997

Operating status

Operating

Headcount range

1–10 employees

Short description

Castellum is a Swedish commercial property company that owns, manages, and develops offices, warehouses, and logistics facilities across Nordic growth cities in Sweden, Denmark, and Finland for B2B tenants.

Ownership category

akta.pro rank

Headquarters

HQ city

Gothenburg

HQ country

Sweden

HQ region

Europe

Offices5 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Operations, Infrastructure, Personnel, Technology or R&D, Marketing or Sales

Revenue model

1. Commercial Property Rental Income: Core revenue from leasing commercial properties including offices, warehouses, logistics, and retail spaces. Properties located in growth cities across Sweden, Denmark, and Finland. Income for Jan-June 2026 was SEK 4,741M with net operating income of SEK 3,215M.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Castellum owns, manages, and develops a commercial property portfolio consisting of offices, logistics/warehouse facilities, and newly constructed or redeveloped properties located in growth cities across Sweden, Denmark, and Finland. The company generates revenue primarily by leasing these properties to commercial tenants, with operational support via regional property management teams, sustainability-certified buildings, and ancillary advisory services including office needs assessments and tenant surveys.

Product overview

Castellum is a Swedish commercial property company that owns, manages, and develops commercial properties across Sweden, Denmark, and Finland. The company operates as a unified property platform offering office solutions (coworking, managed, and custom options), logistics and warehouse facilities, and new construction/redevelopment services. Supporting these core offerings are advisory services including the annual 'Working Life of the Future' trend report, an office needs assessment guide, and an anonymous office usage survey for tenants. The company also provides comprehensive tenant services including property management, defect reporting, and energy data access. Operations are conducted through regional management structures in Mälardalen, Central, Öresund, West, Stockholm, and Helsinki markets.

Differentiator

Problem solved

Functional benefit

Products and services

• Commercial Property Portfolio (Offices, Logistics, Warehouses)

Quantifiable outcome

• 72% of properties have energy performance below 100 kWh/sq.m. per year
• +4 more outcomes

Named customers1 record

Segments3 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature3 records

Partnerships

Three partnerships are on record, tiered key account, core and strategic.

• Ericssonkey accountStrategic or Co-development PartnerMajor tenant relationship where Ericsson has leased 13,000 additional square meters in Hagastaden. Ericsson will not exercise its option to reduce space in its previous lease agreement for the Infinity project, demonstrating long-term commitment.
• Science Based Targets initiative (SBTi)coreOthersSBTi has validated Castellum's climate targets including net-zero greenhouse gas emissions across value chain by 2040 and interim 2030 reduction targets for Scope 1, 2, and 3 emissions.
• Five Swedish Energy Companies (Power Strategy Partnership)strategicStrategic or Co-development PartnerPartnership to develop 'A Joint Power Strategy' document showing how property owners can reduce burden on energy system and become active components in solving energy shortage through demand-response capabilities.

Scale indicators13 records

Recent moves7 records

Expansion highlights6 records

Direct peers

• Fabege: Swedish commercial property company concentrated in Stockholm offices. Directly comparable to Castellum's Stockholm region operations, with similar tenant mix of large enterprises and similar sustainability-led strategy.
• Vasakronan: Sweden's largest commercial property owner, focused on offices in Stockholm, Gothenburg, Malmö, and Uppsala. Closely comparable in asset class (offices) and geographic footprint to Castellum, with similar sustainability positioning.
• Nyfosa: Swedish commercial property company with Nordic logistics, office, and retail exposure. Comparable to Castellum in asset mix and growth-market Nordic positioning.
• Hufvudstaden: Swedish premium office and retail property owner focused on Stockholm and Gothenburg. Comparable to Castellum's high-end commercial portfolio, though with greater concentration on premium CBD assets.
• Wihlborgs Fastigheter: Direct Nordic peer and largest Swedish commercial property company focused on the Öresund region. Wihlborgs just acquired 95 Castellum properties in Skåne for SEK 13.3Bn, making it a directly comparable operator/lessor of offices and logistics in the same geography.
• Catena AB: Nordic logistics property specialist operating across Sweden, Denmark, and Norway. Comparable to Castellum's logistics/warehouse segment with similar geographic Nordic exposure and sustainability positioning.

Broad incumbents

• Balder: Major Swedish listed property company with commercial and residential assets across the Nordics. Comparable in scale and Nordic focus, though with broader asset class mix including significant residential exposure.
• Wallenstam: Swedish property company with commercial and residential assets concentrated in Stockholm and Gothenburg. Comparable to Castellum's Gothenburg HQ focus, though with significant residential exposure.
• SBB (Samhällsbyggnadsbolaget): Major Nordic property company focused on community service properties and residential. Comparable to Castellum as a large Nordic listed property owner, though with different asset class mix and currently undergoing restructuring.

Regional players

• Diös Fastigheter: Swedish commercial property company focused on growth cities in northern Sweden. Comparable to Castellum's smaller-city commercial property strategy, though with a more limited geographic footprint.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights7 records

Customer concentration

• Facebooksv-se.facebook.com/castellumfastigheter
• LinkedInlinkedin.com/company/fastighets-ab-corallen
• Instagraminstagram.com/castellum_ab

Compliance10 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles17 records

Subsidiaries6 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Castellum Corporate