SeAH Wind
SeAH Wind Ltd manufactures XXXL monopile foundations for offshore wind projects, serving major developers like Ørsted and RWE. It operates a purpose-built 400,000-tonne-capacity facility in Middlesbrough, UK, as a wholly-owned subsidiary of South Korea's SeAH Steel Holdings Corporation.
- Company typePrivate
- Founded2021
- HeadquartersMiddlesbrough, United Kingdom
- Headcount101–250
- GTM typeB2B
- OfferingHardware or Manufacturing
What SeAH Wind does
SeAH Wind Ltd is a UK-based manufacturer of XXXL monopile foundations for the offshore wind industry, established in February 2021 as a wholly-owned subsidiary of South Korean conglomerate SeAH Steel Holdings Corporation. The company is constructing and operating the world's largest bespoke monopile manufacturing facility on the South Bank, Teesworks site in Middlesbrough, with a purpose-built building spanning 40m in height, 810m in length, and 200m in width on 90 acres of internal land. It serves major offshore wind developers and operators requiring large-scale steel foundations for next-generation wind turbines, initially contracted to deliver monopiles for Ørsted's Hornsea 3 Offshore Wind Farm (terminated February 2026) and currently engaged in tendering for approximately 7GW of UK AR7 capacity including RWE Vanguard East and West projects.
SeAH Wind's core product is large-scale monopiles fabricated from heavy steel plates, joined and rolled into can and cone sections, welded into tubular structures, coated, and delivered directly via a purpose-built 450m deep-water quayside with -13.6m draft. Technical capabilities include plate rolling up to 15.5m outside diameter, inside and outside longitudinal and circumferential submerged arc welding (SAW), fully integrated internal and external coating booths, heavy steel plate cut and edge preparation, and dedicated secondary steel connections supporting Transition Piece-less (TP-Less) monopile designs. Maximum monopile specifications are 15.5m diameter, 120m length, and 3,500 metric tons. The facility has an annual production capacity of 400,000 tonnes and is supported by ISO 9001:2015, ISO 14001:2015, and ISO 45001:2018 certifications.
The business operates a B2B enterprise sales model, tendering directly with major offshore wind developers for project-based monopile fabrication contracts. Revenue is generated through one-time project contracts rather than recurring licensing, with customers including Ørsted and RWE. Headcount is expected to reach up to 750 direct operational employees with a further 1,500 indirect supply chain roles. Leadership comprises CEO Chung Ryu (32 years of welding and manufacturing experience from SeAH Steel's Suncheon facility), COO Peter Ivey, CRO David Jack, and QHSE Director Colin Atkinson. Total invested capital is £900 million into UK operations.
SeAH Wind firmographics
Firmographics- Name
- SeAH Wind
- Legal name
- SeAH Wind Ltd
- Website
- https://seahwind.com
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 101–250 employees
- Short description
- SeAH Wind Ltd manufactures XXXL monopile foundations for offshore wind projects, serving major developers like Ørsted and RWE. It operates a purpose-built 400,000-tonne-capacity facility in Middlesbrough, UK, as a wholly-owned subsidiary of South Korea's SeAH Steel Holdings Corporation.
- Ownership category
- akta.pro rank
SeAH Wind industry classification
Industry- Product category
- Offshore Wind Foundations Manufacturing
- NAICS
- Plate Work Manufacturing (332313)
- SIC
- Fabricated Plate Work (Boiler Shops) (3443)
- akta.pro primary industry
- Offshore Wind Substructures & Marine Engineering (Monopiles, Jackets, Floating) (EUAMACAE)
- akta.pro secondary industries
- Wind Blades, Towers & Foundations Manufacturing (EUAMACAD), Wind Blades, Towers & Foundations Manufacturing (EUAMAHAE)
Keywords
Where SeAH Wind is headquartered
LocationHeadquarters
- HQ city
- Middlesbrough
- HQ country
- United Kingdom
- HQ region
- Europe
Offices2 records
Markets served
SeAH Wind business model
Business model- GTM type
- B2B
- Offering type
- Hardware or Manufacturing
- Cost components
- Infrastructure, Supply Chain, Personnel, Operations, Technology or R&D
Revenue model
- Monopile Foundation Manufacturing: Manufacturing and supplying large-scale XXXL monopile foundations for offshore wind projects. Revenue generated through project-based contracts with offshore wind developers for fabrication of monopiles that support wind turbine generators.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels4 records
SeAH Wind product offering
Product offeringCore offering
SeAH Wind designs and manufactures XXXL monopile foundations for offshore wind turbines from a single integrated facility on Teesside, UK. The company produces large-scale steel monopiles up to 15.5m outside diameter, 120m length, and 3,500 metric tons, with end-to-end in-house capabilities including plate rolling, submerged arc welding, secondary steel connections for Transition Piece-less designs, and integrated coating. Monopiles are sold to enterprise offshore wind developers and operators on project-specific contracts.
Product overview
SeAH Wind operates as a monopile manufacturing facility offering end-to-end production of XXXL monopile foundations for offshore wind projects. The facility provides a fully integrated service including plate cutting and edge preparation, plate rolling capabilities up to 15.5m outside diameter, longitudinal and circumferential welding, secondary steel connections for TP-Less Monopiles, internal and external coating, and storage. The facility produces monopiles up to 120m in length and 3500 metric tons, positioning it as the world's largest bespoke monopile manufacturing facility.
Differentiator
Problem solved
Functional benefit
Products and services
- Monopiles Large-scale steel monopile foundations for offshore wind turbines, fabricated from thick steel plates joined and rolled into can and cone sections, welded into tubular structures, and driven into the seabed to support wind turbine generators. The facility can produce monopiles up to 15.5m outside diameter, 120m in length, and 3,500 metric tons, with end-to-end capabilities including plate cutting, edge preparation, rolling, welding, secondary steel for TP-Less designs, and integrated coating. Targeted at major offshore wind developers and operators such as Ørsted and RWE for utility-scale offshore wind farm projects.
Quantifiable outcome
- Monopiles power over 3.3 million UK homes (Hornsea 3)
- +1 more outcomes
Companies that use SeAH Wind
Customer profileNamed customers2 records
Segments1 record
Ideal customer profiles1 record
SeAH Wind technology and API
TechnologyTechnology focussed No
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
SeAH Wind partnerships and signals
Strategic signalPartnerships
17 partnerships are on record, tiered core, minor and major.
- MammoetcoreAppointed as key subcontractor for Hornsea 3 Offshore Wind Project. Provides self-propelled modular transporters (SPMTs) within the SeAH Wind facility for transportation of can/cone structures and completed monopiles. Their expertise in heavy transport solutions ensures seamless and efficient movement of monopiles.
- Glacier EnergycoreAppointed as key subcontractor for Hornsea 3 Offshore Wind Project. Conducts non-destructive testing (NDT) of welds throughout the manufacturing process, ensuring highest quality standards and compliance with Ørsted's stringent requirements and international offshore wind regulations.
- Hutchinson EngineeringcoreAppointed as key subcontractor for Hornsea 3 Offshore Wind Project. Tasked with supplying secondary steel components for the Hornsea 3 project. Selected for their previous experience on Ørsted projects and expertise in supplying steel structures to the offshore sector.
- AdvantexminorProvides security and surveillance services at SeAH Wind's wind turbine monopile factory on Teesside.
- K2 Construction ManagementcorePrincipal contractor, design and construction manager with overarching responsibility for the facility construction scheme. Supported SeAH with planning, design, and cost management from early engagement. Responsible for development management with a team of over 70 personnel overseeing health & safety, quality, construction, and contractor management.
- Bauer and Keller Joint VenturemajorJoint venture between Bauer Technologies and Keller managed the design, installation & testing of over 7000 piles for the facility foundation. Employed more than 150 people at peak using over 15 piling rigs.
- SeverfieldmajorUndertaking fabrication and site erection of the main facility structural steelwork, design and site erection of secondary steelwork for roof and wall cladding, external stairs, ladders, access walkways, and industrial/pedestrian doors/windows.
- Hansons ConcretemajorConstructed three purpose-built concrete batching plants for sole supply of materials for the SeAH project. Produces more than 250 cubic meters of concrete per hour with a fleet of 16 mixers delivering product 12 hours a day.
- Rainton ConstructionmajorSupports site with earthworks, land remediation and concrete requirements for the 7000 piles, caps, and slabs. Constructed the mile-long South Bank Link Road providing site access including footpaths and cycleway.
- Wilson JamesmajorSupplies logistics services covering traffic and personnel management, building logistics, stores and compounds, site management team, office and support systems, temporary power, water and lighting, waste management, access control, CCTV.
- SES Engineering UKmajorLeading M&E partner responsible for design, management & installation of all mechanical, electrical, and plumbing works throughout the site.
- AmeonmajorBuilding services, engineering and utilities infrastructure business managing installation of both HV & LV works throughout the site and main facility.
- Teesworks Cladding Joint VenturemajorJoint venture between Midas Cladding and Barrier Group managing design and installation of all cladding sheets, roofing sheets, roof lights, gutters, flashings, and access provision for the main facility and power stations.
- Hartlepool CollegecorePartnered with SeAH Wind for apprenticeship scheme launched in September 2023. 12 students selected for Welding and Fabrication Scholarship, transitioning to permanent apprentices by December 2023.
- Middlesbrough CollegecorePartnered with SeAH Wind Academy alongside Nordic Products & Services for bespoke employer-led training programme. 30 participants enrolled in comprehensive 24-week training and development program supported by Tees Valley Combined Authority's Adult Education Budget.
- Nordic Products & ServicescorePartnered with SeAH Wind Academy alongside Middlesbrough College to create training programmes under the SeAH Wind Academy initiative.
- Tees Valley Combined AuthoritymajorSupports SeAH Wind Academy's 24-week training and development programme through its Adult Education Budget, helping individuals gain essential knowledge and skills for employment in the steel and fabrication industry.
Scale indicators10 records
Recent moves6 records
Expansion highlights6 records
SeAH Wind competitors and assessment
Company assessmentEmerging players
- Haizea Wind: Spanish manufacturer of monopiles and wind towers. Smaller and earlier-stage than SeAH Wind but directly competes in the European monopile supply market.
Direct peers
- Sif Group: Dutch-listed manufacturer of large-diameter monopile foundations for offshore wind. Most direct comparable to SeAH Wind in terms of monopile-only focus, scale of foundations, and European customer base.
- Lamprell: UAE-based fabricator transitioning from oil & gas into offshore wind foundations. Comparable as a heavy steel fabrication peer pivoting into the offshore wind foundations market.
- Bladt Industries: Danish fabricator of offshore wind foundations including jackets and transition pieces. Comparable as a European offshore-wind foundation manufacturer serving major developers; differs by emphasising jackets and TPs over monopiles.
- Welcon: Danish manufacturer of towers and large-diameter monopiles for onshore and offshore wind. Comparable in heavy steel fabrication for wind applications and serves a similar European customer base.
- Steelwind Nordenham: Dillinger subsidiary producing monopiles and transition pieces for offshore wind. Comparable in product mix (foundations) and in serving European utility-scale offshore wind projects.
- Smulders: Belgian-Dutch fabricator of offshore wind foundations (monopiles, jackets, TPs) and substations. Comparable multi-product foundation manufacturer with overlapping customer base in European offshore wind.
- EEW SPC (EEW-BSH): German steel processor producing heavy-plate monopiles for offshore wind. Directly competes with SeAH Wind in the XXXL monopile segment serving European offshore wind developers.
Broad incumbents
- Vestas: Global wind turbine OEM and the largest customer category for monopile foundations. Not a manufacturer but the principal demand driver for SeAH Wind's products; serves as the market benchmark for offshore wind growth and turbine scale-up that drives monopile demand.
Regional players
- Global Energy Group: Scotland-based fabrication and services group with offshore wind foundation manufacturing capability at Nigg. Comparable as a UK-headquartered offshore-wind foundation fabricator serving similar North Sea projects.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
SeAH Wind social profiles
Digital presenceSeAH Wind compliance and trust
Trust signalCompliance3 records
SeAH Wind financial estimates
Financial estimateRevenue estimate
Valuation estimate
SeAH Wind leadership team
Management profileNumber of profiles
Profiles4 records
SeAH Wind funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
SeAH Wind M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about SeAH Wind
What does SeAH Wind do?
SeAH Wind designs and manufactures XXXL monopile foundations for offshore wind turbines from a single integrated facility on Teesside, UK. The company produces large-scale steel monopiles up to 15.5m outside diameter, 120m length, and 3,500 metric tons, with end-to-end in-house capabilities including plate rolling, submerged arc welding, secondary steel connections for Transition Piece-less designs, and integrated coating. Monopiles are sold to enterprise offshore wind developers and operators on project-specific contracts.
Is SeAH Wind a public or private company?
SeAH Wind is a private company. It is classified as corporate owned and is currently operating.
When was SeAH Wind founded?
SeAH Wind was founded in 2021. It employs 101 to 250 people.
Where is SeAH Wind based?
SeAH Wind is headquartered in Middlesbrough, United Kingdom, in the Europe region.
How does SeAH Wind make money?
One revenue line is on record: monopile Foundation Manufacturing.
Who are SeAH Wind's main competitors?
Haizea Wind is listed as an emerging player. Direct peers are Sif Group, Lamprell, Bladt Industries, Welcon, Steelwind Nordenham, Smulders and EEW SPC (EEW-BSH). Vestas is listed as a broad incumbent. Global Energy Group is listed as a regional player.
Does SeAH Wind have an API?
No public API is recorded for SeAH Wind.
What industry is SeAH Wind in?
SeAH Wind's product category is Offshore Wind Foundations Manufacturing. Its primary akta.pro industry code is EUAMACAE, Offshore Wind Substructures & Marine Engineering (Monopiles, Jackets, Floating), with a secondary code of EUAMACAD, Wind Blades, Towers & Foundations Manufacturing. Its NAICS code is 332313 and its SIC code is 3443.