Neptunia Invest

What Neptunia Invest does

Neptunia Invest AB (publ) is a Swedish investment holding company founded in 2014 by brothers Johan and Mikael Karlsson as a joint platform for their existing ownership in Slättö Förvaltning and MW Group. The firm operates as a long-term active owner without a stated investment horizon, exercising influence through board representation, and targets market-leading Nordic companies in three verticals: real estate (via Slättö Förvaltning, a Nordic fund manager running Core Plus and Value Add strategies across housing, logistics, hotels, and social infrastructure), defense and security (via MW Group, which delivers services to society-critical infrastructure and total defense), and energy (via Ingrid Capacity, building large-scale energy storage infrastructure in Sweden). A fourth core holding, SIBS, brings exposure to construction technology through a system that integrates automated planning with industrial factory-level production. Since 2019, Neptunia has additionally built a minority holdings portfolio focused on entrepreneur-led digital business models.\n\nThe business model is that of a holding company rather than an operating business: value is generated through capital appreciation of core holdings, dividends, and financial investments managed through Slättö's own funds. As of Q1 2026, adjusted NAV was SEK 2,575m (vs. SEK 2,759m in Q1 2025), NAV per share SEK 30,397 across 73,850 shares, adjusted LTV 18%, and interest coverage 2.2x on an R12 basis. Financing has been secured principally through senior unsecured bonds on Nasdaq Stockholm (SEK 600m in March 2025 and SEK 200m in March 2026 under a SEK 1bn framework) and a SEK 200m subordinated convertible issued in June 2023.\n\nOwnership is concentrated among founders and Nordic institutional investors: the Karlsson brothers control 40.9% via Brofund Group AB; Topsin Investments S.A. (affiliated with board member Georg Ehrnrooth) holds 15.7%; Talces AB 10.5%; Öhman J:or Alternative Investments 5.9%; RoosGruppen 5.0%; and Chairman Gunnar Brock 4.0%. The board is small (six members plus the CEO) and includes senior Nordic industrial figures, with all board members also being shareholders. Activities across FY2025-FY2026 include new debt issuance, listing of bonds on Nasdaq Stockholm, and the announced MW Group acquisition of Alumbra (a Nordic precision components supplier for defense, space, and advanced industrial applications).

Name

Neptunia Invest

Legal name

Neptunia Invest AB (publ)

Website

https://neptuniainvest.se

Company type

Public

Founded year

2014

Operating status

Operating

Headcount range

1–10 employees

Short description

Neptunia Invest is a Swedish investment holding company that creates and develops market-leading Nordic companies in real estate, defense and security, and energy through active long-term ownership of portfolio firms including Slättö Förvaltning, MW Group, SIBS, and Ingrid Capacity.

Ownership category

akta.pro rank

Product category

Investment Holding Company

NAICS

Funds, Trusts, and Other Financial Vehicles (525), Other Financial Vehicles (52599), Securities, Commodity Contracts, and Other Financial Investments and Related Activities (523)

SIC

Real Estate Dealers (For Their Own Account) (6532), Services-Management Consulting Services (8742)

akta.pro primary industry

Social Infrastructure Funds (Schools, Hospitals, Civic) (FSANAEAN)

akta.pro secondary industries

Real Estate Public-Private Partnership (PPP) & Infrastructure-Adjacent Real Estate Advisory (BPAJANAL), Real Assets — Social Infrastructure / PPP (Schools, Hospitals, Government Facilities) (FSAHAIAH)

Keywords

• Investment holding company
• Active ownership investments
• Nordic real estate investment
• Defense security services
• Energy storage infrastructure

Headquarters

HQ city

Stockholm

HQ country

Sweden

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Others, Marketing or Sales

Distribution channels2 records

Marketing channels3 records

Core offering

Neptunia Invest AB (publ) is a Swedish investment company that creates and develops market-leading companies through active long-term ownership. It invests in core holdings across Nordic real estate, defense and security, construction technology, and energy storage sectors, exercising influence through board representation. The company also manages a minority holdings portfolio and financial investments through Slättö's funds.

Product overview

Neptunia Invest is a Swedish investment company that creates and develops market-leading companies through active ownership. The company operates a portfolio of core holdings across four main sectors: real estate (Slättö Förvaltning), defense and security (MW Group), construction technology (SIBS), and energy storage (Ingrid Capacity). These core holdings are complemented by a minority holdings portfolio focused on digital business models and financial investments managed through Slättö's funds. The company takes a long-term investment perspective without a stated investment horizon and exercises influence through board representation.

Differentiator

Problem solved

Functional benefit

Products and services

• Slättö Förvaltning (Core Holding) A manager of investment funds focused on Nordic real estate investments. Slättö creates and manages funds within Core Plus and Value Add strategies that invest thematically in housing, logistics properties, hotels, and social infrastructure.
• MW Group (Core Holding) A Nordic corporate group delivering services to socially critical infrastructure and total defense (civil defense).
• SIBS (Core Holding) Has developed a market-leading technical system and production concept to streamline and ensure quality of construction projects. The construction system integrates automated planning with industrial production at factory level.
• Ingrid Capacity (Core Holding) Builds the necessary infrastructure for large-scale, efficient energy storage in Sweden that evens out production peaks and contributes to electricity grid stability.
• Minority Holdings Portfolio A portfolio of minority-owned holdings focused on companies led by strong entrepreneurs and digital business models, where Neptunia provides capital and industrial networks to help these companies reach their full potential.
• Financial Investments Financial investments managed through Slättö's funds and in established companies within Neptunia's sectors, providing synergies with core holdings, liquidity, and continuous net cash flow.

Segments4 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Five partnerships are on record, tiered supporting and core.

• BAHR Advokatbyrå ABsupportingImplementation/ SI/ Consulting Partner · 25 March 2026Legal counsel for the senior unsecured bonds issued in March 2026.
• SIBScoreStrategic or Co-development Partner · 1 January 2019Core holding in the Neptunia portfolio. SIBS has developed a market-leading technical system and production concept to streamline and ensure quality of construction projects. The construction system integrates automated planning with industrial production at factory level.
• Ingrid CapacitycoreStrategic or Co-development Partner · 1 January 2019Core holding in the Neptunia portfolio. Ingrid Capacity builds the necessary infrastructure for large-scale, efficient energy storage in Sweden that evens out production peaks and contributes to electricity grid stability.
• Slättö FörvaltningcoreStrategic or Co-development Partner · 1 January 2014Core holding in the Neptunia portfolio. Johan Karlsson founded Slättö and serves as CEO. Slättö is a manager of investment funds focused on Nordic real estate investments, creating and managing funds within Core Plus and Value Add strategies investing in housing, logistics properties, hotels and social infrastructure.
• MW GroupcoreStrategic or Co-development Partner · 1 January 2014Core holding in the Neptunia portfolio. Mikael Karlsson founded MW Group and serves as CEO. MW Group is a Nordic corporate group delivering services to society-critical infrastructure and total defense.

Scale indicators8 records

Recent moves11 records

Expansion highlights4 records

Broad incumbents

• Investor AB: Sweden's largest listed investment company with a broad Nordic and global portfolio. Comparable in active-ownership, long-duration philosophy but at significantly greater scale and diversification.

Direct peers

• Industrivärden: Swedish listed investment company focused on long-term ownership of Nordic industrial holdings. Closely comparable business model of active, long-horizon ownership of a concentrated portfolio of operating companies.
• Kinnevik: Swedish investment company with focus on consumer and growth-oriented Nordic and European businesses. Comparable listed investment-holding structure with concentrated portfolio of operating companies.
• Storskogen: Swedish investment company acquiring and developing profitable SMEs in the Nordics. Comparable long-term, decentralized ownership model across operating businesses.
• Latour: Swedish investment company combining a fully listed industrial portfolio with wholly-owned business operations. Closely comparable hybrid of listed holdings and active operating-company ownership.
• Ratos: Swedish investment company acquiring and developing Nordic operating companies. Closely comparable in active ownership model and Nordic mid/large-cap focus.
• Lundbergs: Swedish family-controlled investment company with diversified holdings in listed Nordic real estate, industrials, and infrastructure. Comparable long-term, concentrated Nordic investment philosophy.
• Svolder: Swedish investment company with a concentrated portfolio of listed Nordic small and mid-cap companies. Comparable long-horizon listed-holding structure on Nasdaq Stockholm.
• Bure Equity: Swedish investment company operating Nordic companies in health, education, and financial services. Comparable active-ownership, long-duration holding-company model.

Regional players

• Catella: Swedish financial group with significant Nordic real estate investment management operations. Partially comparable given Neptunia's real estate exposure through Slättö, though Catella is more asset-management focused.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/neptunia-invest

Compliance1 record

Revenue estimate

Valuation estimate

Number of profiles

Profiles7 records

Funding overview

Funding rounds1 record

Investors

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

M&A

Investments9 records

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

Frequently asked questions about Neptunia Invest