Kymenlaakson Sähkö

What Kymenlaakson Sähkö does

Kymenlaakson Sähkö (KSOY) is a Finnish municipally-owned regional energy group founded in 1918, operating across Kymenlaakso and parts of South Karelia, Uusimaa, and Päijät-Häme. The group comprises Kymenlaakson Sähkö Oy (energy business and electricity production) and its wholly-owned subsidiary Kymenlaakson Sähköverkko Oy (the regulated distribution system operator). As a licensed DSO, KSOY operates as a natural monopoly delivering electricity distribution network services to over 100,000 customers (~150,000 residents) through medium-voltage (20 kV) and high-voltage (110 kV) lines, substations with transformers, and a fleet of smart meters being replaced 2024–2027 to enable quarter-hourly consumption data and HAN port integration.

Following the January 2024 transfer of retail customers to Väre (a related-entity electricity supplier), KSOY's revenue is now anchored in regulated network fees consisting of a fixed basic charge plus variable energy-based fees, billed monthly to residential and corporate customers. The group also generates carbon-neutral electricity through ownership stakes in hydroelectric assets, Olkiluoto 3 nuclear power, and a 10% share of the Lestijärvi wind farm (Finland's largest at 455 MW, completed December 2025) held via Kymppivoima companies. Customer engagement is delivered through the Oma KSOY digital portal (web and mobile), the 'Arki Virtanen' AI chatbot, bank-integrated e-invoicing, and the Energiaa content platform. Geographic expansion advanced in 2025 with the acquisition and subsequent merger of Kaakon Alueverkko into Kymenlaakson Sähköverkko. The group is owned by 10 municipalities, has approximately 55 employees, and reported €111.3M in revenue and €21.4M operating profit in FY2025, with €27.1M invested in network infrastructure.

Name

Kymenlaakson Sähkö

Legal name

Kymenlaakson Sähkö Oy

Website

https://ksoy.fi

Company type

Private

Founded year

1918

Operating status

Operating

Headcount range

51–100 employees

Short description

Kymenlaakson Sähkö (KSOY) is a municipally-owned Finnish regulated electricity distribution system operator serving over 100,000 customers across the Kymenlaakso region, with carbon-neutral generation assets in nuclear, wind, and hydro.

Ownership category

akta.pro rank

Product category

Electricity Distribution Services

NAICS

Electric Power Distribution (221122), Electric Power Transmission, Control, and Distribution (22112), Electric Power Generation (22111)

SIC

Electric Services (4911), Electric, Gas & Sanitary Services (4900)

akta.pro primary industry

Microgrid & Local Distribution Operators (Campus/Base/Industrial Park DSOs) (EUADABAF)

akta.pro secondary industries

Distribution Automation & SCADA / DMS Field Integration (EUAEACAD), SCADA/DMS/OMS Integration, Upgrades & Managed Services (EUAEANAE), Substations, Transformers & Grid Step-Up Facilities (EHV Substations, GSU Transformers) (EUAMAFAE)

Keywords

• Electricity distribution services
• Electricity network operations
• Smart metering systems
• Electricity connection services
• Carbon-neutral power generation

Headquarters

HQ city

Elimäki

HQ country

Finland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Network Services (Electricity Distribution): Regulated electricity transmission and distribution services through the company's distribution network. Revenue is generated through grid fees charged to all customers connected to the network, including a fixed basic fee and variable energy-based fees. This is the core regulated business operating as a natural monopoly in the service territory.
2. Electricity Sales (Historical/Transferred): Retail electricity sales to end customers. In 2024, the retail customer base was transferred to Väre, making Väre the default electricity supplier for the area. KSOY retains ownership of the distribution network.
3. Electricity Production: Carbon-neutral electricity generation through ownership stakes in hydroelectric, nuclear (Olkiluoto 3), and wind power (Lestijärvi wind farm). Production capacity includes shares from Kymppivoima companies. Production in 2026 YTD: 220 GWh.

Pricing tiers

Go-to-market motion1 record

Distribution channels5 records

Marketing channels9 records

Core offering

Kymenlaakson Sähkö (KSOY) is a municipally-owned regulated distribution system operator that transmits and distributes electricity to over 100,000 customers across the Kymenlaakso region of Finland through its medium-voltage (20 kV) and high-voltage (110 kV) network infrastructure. Following a 2024 restructuring, retail electricity sales were transferred to Väire, and KSOY now focuses on regulated network services, electricity connections (new, modified, ownership transfers), and small-scale production services for solar prosumers. The company also participates in carbon-neutral electricity generation through ownership stakes in nuclear (Olkiluoto 3), wind (Lestijärvi), and hydropower assets via Kymppivoima.

Product overview

Kymenlaakson Sähkö (KSOY) is a regional energy group consisting of Kymenlaakson Sähkö Oy (energy business — electricity sales and production) and its wholly-owned subsidiary Kymenlaakson Sähköverkko Oy (distribution system operator). The group delivers electricity to over 100,000 customers across approximately 150,000 residents in the Kymenlaakso region. The core product portfolio centers on the Oma KSOY customer self-service portal (web + mobile), which unifies bill payment, real-time consumption monitoring via HAN-port-enabled smart meters, disruption notifications, and e-invoicing into a single platform. Network operations are delivered through electricity distribution network services (Sähkön verkkopalvelut), electricity connections (Sähkön liittymät), and small-scale production services (pientuotannon palvelut) for solar prosumers. The ongoing smart meter replacement program (2024–2027) is replacing all 100,000+ meters with next-generation smart meters enabling 15-minute resolution data and HAN port access. Additional services include real-time outage mapping, 24/7 fault reporting, AI-powered customer service (Arki Virtanen), corporate network services, and the Energiaa content platform. Electricity production is carbon-neutral, sourced from nuclear (Olkiluoto 3 via Kymppivoima), wind (Lestijärvi wind farm 10% share), and hydropower.

Differentiator

Problem solved

Functional benefit

Brands

• Oma KSOY: Digital customer service platform for managing electricity accounts, bill payments, and consumption monitoring.

Products and services

• Sähkön verkkopalvelut (Electricity Network Services) Regulated electricity transmission and distribution service through Kymenlaakson Sähköverkko's medium-voltage (20 kV) and high-voltage (110 kV) network infrastructure to over 100,000 customers. Includes 24/7 network monitoring, fault response, and customer service for network-related matters. Revenue generated through recurring grid fees with a fixed basic fee and variable energy-based fee components, billed monthly.
• Sähköliittymät (Electricity Connections) Electricity connection services for new electricity connections (liittymän hankinta), modifications to existing connections, and ownership transfer of connections. Available for residential, commercial, and industrial customers. Connection fees are charged as one-time payments under multi-year contracts.
• Pientuotannon palvelut (Small-Scale Production Services) Services for small-scale electricity producers including grid connection for solar panels (pientuotannon liittäminen), net metering arrangements (pientuotannon netotus), and energy community setup (energiayhteisö). Special production network service rates apply under a dedicated published price list, enabling prosumers to export excess electricity to the grid.
• Palvelut yritysasiakkaille (Services for Corporate Customers) Specialized network services for large commercial and industrial customers, including available capacity maps for distribution network planning (vapaa kapasiteetti jakeluverkossa), dedicated large-customer service for high-voltage connections (sähköverkon suurasiakaspalvelu), and customized network service agreements. Customers are billed monthly under a separate large-customer price list.

Quantifiable outcome

• Highest electricity transmission volume in company history: 752 GWh in January-April 2026 (48% increase)
• +3 more outcomes

Named customers4 records

Segments4 records

Ideal customer profiles4 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability2 records

Feature5 records

Partnerships

Twelve partnerships are on record, tiered core and minor.

• Elvera OycoreStrategic or Co-development Partner · 1 January 2024Elvera Oy serves as the primary installation partner for the smart meter replacement program. They are responsible for the actual meter replacement work across most of the service area as part of the Mittarikiertue (Meter Tour) joint project with Järvi-Suomen Energia and PKS Sähkönsiirto.
• Laukaan EnergiaminorStrategic or Co-development PartnerServes as the smart meter installation partner for archipelago areas, handling meter replacements in island locations where Elvera does not operate.
• Hitachi EnergycoreTechnology or IntegrationSupplied the main transformer for Hamina Salmenkylä substation replacement. Also provided installation and testing services for the transformer. Investment value approximately 700,000 euros.
• KymppivoimacoreStrategic or Co-development PartnerKSOY holds ownership stakes through Kymppivoima companies, which owns 10% of the Lestijärvi wind farm (Finland's largest). Kymppivoima provides access to diversified renewable energy production.
• OX2coreStrategic or Co-development PartnerCo-owner of the Lestijärvi wind farm (455 MW total capacity, 69 turbines) alongside KSOY/Kymppivoima, Oulun Energia, and Kuopion Energia. OX2 developed and built the wind farm.
• Oulun EnergiacoreStrategic or Co-development PartnerCo-owner of the Lestijärvi wind farm alongside OX2, KSOY/Kymppivoima, and Kuopion Energia.
• Kuopion EnergiacoreStrategic or Co-development PartnerCo-owner of the Lestijärvi wind farm alongside OX2, KSOY/Kymppivoima, and Oulun Energia.
• VärecoreChannel Partner/ Reseller/ DistributorVäre is the default electricity supplier for KSOY's distribution area following the transfer of retail customers in 2024. Väre handles all retail electricity sales to end consumers in the region, operating as a subsidiary relationship.
• Orimattilan Lämpö OyminorOthersKSOY has holdings in Orimattilan Lämpö Oy, a local heating company.
• Enerva OyminorOthersKymenlaakson Sähköverkko Oy owns 20% of Enerva Oy, an energy-related company.
• Suomen Liittymisjohdot OycoreOthersWholly-owned subsidiary of KSOY focused on connection line infrastructure for renewable energy project grid connections.
• Kaakon AlueverkkocoreChannel Partner/ Reseller/ DistributorKSOY acquired 100% of Kaakon Alueverkon shares and merged it into Kymenlaakson Sähköverkko as of December 31, 2025, expanding the network service area.

Scale indicators10 records

Recent moves1 record

Expansion highlights5 records

Broad incumbents

• Caruna Oy: Finland's largest DSO, serving ~480,000 customers across southern and western Finland. Directly comparable as a regulated electricity distribution utility operating under the same Finnish regulatory framework, though at significantly greater scale (enterprise value in the multi-billion euro range).

Regional players

• Pori Energia Oy: Regional Finnish energy utility serving the Pori area in western Finland. Comparable municipality-owned energy group with generation, distribution, and heating operations, but geographically separate from KSOY's service territory.
• Turku Energia Sähköverkot Oy: DSO serving the Turku region in southwestern Finland. Comparable regulated distribution network operator under the same Finnish regulatory framework, but focused on a different geographic service territory.
• Helen Verkko Oy: DSO subsidiary of Helsinki energy utility Helen, serving the Helsinki metropolitan area. Comparable regulated DSO operations within the same national regulatory framework, but geographically focused on the capital region rather than eastern Finland.

Direct peers

• Oulun Energia: Municipally-owned Finnish energy company and co-owner of the Lestijärvi wind farm alongside KSOY/Kymppivoima. Comparable as a multi-utility with generation, distribution, and retail operations under similar municipal ownership structure.
• PKS Sähkönsiirto Oy: Electricity distribution company in Central Finland and co-partner with KSOY in the smart meter rollout (Mittarikiertue). Comparable DSO with similar regulated-network profile and customer scale.
• Järvi-Suomen Energia: Regional Finnish energy company that co-partners with KSOY in the Mittarikiertue smart meter installation program. Comparable as a municipally-owned DSO with similar scale, customer base, and rural-grid modernization profile.
• Elenia Oy: Second-largest Finnish DSO serving ~432,000 customers in central Finland. Operates a regulated network monopoly with comprehensive smart metering and underground cabling programs, making it the closest scale and geographic analogue to KSOY's network business.
• Kuopion Energia: Municipally-owned Finnish energy company and Lestijärvi wind farm co-owner. Comparable vertically integrated municipal energy utility with carbon-neutral generation ambitions and regulated DSO arm.

Others

• Väre Oy: Default electricity supplier for KSOY's distribution area since 2024, taking over retail sales operations. Sister subsidiary under related municipal ownership, providing a directly comparable retail electricity and customer service platform in the same region.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• YouTubeyoutube.com/channel/UCs-XaSBGfogwayNlB1B_gnA
• Facebookfacebook.com/KymenlaaksonSahko
• LinkedInlinkedin.com/company/kymenlaakson-s%C3%A4hk%C3%B6
• Instagraminstagram.com/ksoy_arkivirtaa
• Xx.com/KS_Oy

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

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 Kymenlaakson Sähkö