Siemens Gamesa

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A Spanish-German wind-energy company created by the 2017 combination of Siemens Wind Power and Gamesa.

Last updated October 24, 2026

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Overview

Siemens Gamesa Renewable Energy was a Spanish-German wind-energy engineering company formed in 2017 by combining Siemens Wind Power with Gamesa Corporación Tecnológica. The resulting business brought together Siemens's established offshore and direct-drive turbine capabilities with Gamesa's extensive onshore wind operations, development experience and Spanish industrial base. It was headquartered in Zamudio in Biscay, Spain, with important activities in Madrid and Sarriguren and offshore operations centered in Germany and Denmark. The company's business covered the design, manufacture, installation and servicing of wind turbines and related equipment. Its portfolio included onshore turbines for a broad range of wind conditions, offshore turbines based on Siemens's direct-drive technology, turbine components, long-term operations and maintenance services, and selected power-electronics activities inherited from Gamesa. Its customers included utilities, independent power producers and offshore-wind developers. The company operated manufacturing and engineering facilities across Europe, North America, Asia and Africa, including blade, nacelle, hub and service operations. Siemens Gamesa became one of the world's largest wind-turbine suppliers by installed capacity after the merger. It was especially prominent in offshore wind, where its direct-drive platforms and progressively larger turbines were used in major projects in the United Kingdom, Denmark, Taiwan and the United States. The SG 8.0-167 DD and the later SG 14.0-222 represented the company's push toward higher-capacity offshore machines intended to reduce the number of turbines and associated balance-of-plant requirements at large wind farms. In onshore wind, the company continued to support the Gamesa and Siemens product families and a substantial global service fleet. The business also inherited the long histories of its two predecessors. Gamesa originated in 1976 as Grupo Auxiliar Metalúrgico and entered wind-turbine manufacturing through Gamesa Eólica in the 1990s. Siemens's wind business developed from the Danish Bonus Energy operation, whose early offshore work included turbines at Vindeby, widely regarded as the world's first offshore wind farm. Siemens acquired Bonus in 2004, later building a global manufacturing and offshore-development network. The post-merger company faced persistent pressure from rising raw-material, logistics and project costs, as well as technical and quality problems affecting parts of the Gamesa 4.X and 5.X onshore platforms. In 2023, a technical review led Siemens Energy to disclose substantial expected costs and losses connected with the wind business. Siemens Energy subsequently took full control of Siemens Gamesa, and the company's publicly traded shares were delisted. Siemens Gamesa therefore ceased to operate as an independent listed company, although its wind business and products continued within Siemens Energy. The corporate brand remains associated with Siemens Energy's wind-turbine operations, particularly offshore wind, but its standalone listed-company status ended in 2023.

History

Siemens Gamesa's history combines two separate wind-industry lineages. Gamesa began in 1976 as Grupo Auxiliar Metalúrgico, founded by Juan Luis Arregui and Joseba Mikel Grajales to work on emerging technologies including robotics, microelectronics, aeronautics and composite materials. Gamesa Eólica was established in 1994 as the group's wind-turbine subsidiary. It moved into wind-farm development and construction in 1995 and completed its first wind farm in 1996. Gamesa had a commercial partnership with Vestas that lasted until 2002, while also expanding its component capabilities through acquisitions of gearbox, generator and converter businesses. Gamesa became a public company in 2000 and joined Spain's IBEX 35 in 2001. During the following years it disposed of its aeronautics and services activities and concentrated increasingly on sustainable energy, principally wind power. The Siemens wind business grew from Bonus Energy, a Danish company whose roots lay in Danregn's diversification into wind turbines around 1980. Danregn Vindkraft was established as a separate wind company in 1981 and adopted the Bonus name in 1983. Bonus supplied turbines to the Vindeby offshore wind farm in 1991, an early landmark in commercial offshore wind. Siemens acquired Bonus in 2004 and developed it into an international wind-power operation. Siemens expanded blade, nacelle and hub production in Denmark, Germany, the United States, Canada and China, and developed direct-drive turbine technology. Its direct-drive designs removed the gearbox and became a foundation for the company's large offshore portfolio. Siemens also acquired a stake in offshore installation company A2SEA and pursued major manufacturing investments in the United Kingdom, Egypt, Morocco and Germany. On 17 July 2016, Siemens and Gamesa announced plans to merge their wind operations. Under the agreed structure, Siemens held 59 percent of the combined company and former Gamesa shareholders held 41 percent; Siemens also paid cash as part of the transaction. The merger took effect on 3 April 2017. Siemens Gamesa was headquartered in Spain, while its offshore operations were based principally in Hamburg and Vejle. The combination created one of the largest wind-turbine manufacturers by installed capacity and gave the company a broad portfolio across onshore, offshore and service markets. After the merger, Siemens Gamesa supplied increasingly large offshore turbines. Its 6 MW platform was upgraded to 7 MW and then 8 MW, leading to the SG 8.0-167 DD platform. The company supplied major projects including Hornsea One and Hornsea Two in the United Kingdom and developed the SG 14.0-222, one of the world's largest wind turbines. Manufacturing and assembly capabilities included offshore nacelles at Cuxhaven, blades in several countries and an offshore nacelle facility in Taiwan. The company also used specialized transport vessels and expanded service activities, including through the acquisition of Senvion's European service fleet in 2019. The company faced a difficult market environment after the merger. Wind-turbine manufacturers experienced inflation in steel, resin, transport and other inputs, while project schedules and fixed-price contracts constrained their ability to pass on costs. Siemens Gamesa's most serious setback was a quality crisis affecting some Gamesa onshore platforms. In 2023, a technical review found faulty components in a substantial share of examined turbine models. The resulting remediation, inspection and replacement expectations produced very large charges and a severe fiscal-year deficit. The crisis weakened confidence among investors and lenders and required support for Siemens Energy. Siemens Energy subsequently acquired the remaining public shares in Siemens Gamesa and delisted the company in 2023. Siemens Gamesa is consequently no longer an independent listed corporation, but its wind activities continue under Siemens Energy. Later blade-related defects at Norway's Odal Vind project demonstrated that quality and reliability remained important issues for the inherited fleet.

2023
Standalone listing ends
[1]Siemens Gamesaen.wikipedia.org
Siemens Energy takes full ownership and Siemens Gamesa is delisted as an independent company.
2019
Senvion European service fleet is acquired
[1]Siemens Gamesaen.wikipedia.org
Siemens Gamesa agrees to acquire Senvion's European service operations.
2018
Major Hornsea Two contract is awarded
[1]Siemens Gamesaen.wikipedia.org
Siemens Gamesa wins a major offshore turbine supply and maintenance contract for Ørsted's Hornsea Two project.
2017
Siemens Gamesa is formed
[1]Siemens Gamesaen.wikipedia.org
The merger becomes effective on 3 April 2017.
2016
Siemens and Gamesa agree to combine wind businesses
[1]Siemens Gamesaen.wikipedia.org
The companies announce the transaction that will create Siemens Gamesa.
2010
Siemens launches a production direct-drive platform
[1]Siemens Gamesaen.wikipedia.org
A 3 MW direct-drive turbine enters the Siemens product range after prototype testing.
2004
Siemens acquires Bonus Energy
[1]Siemens Gamesaen.wikipedia.org
Siemens acquires the Danish Bonus wind business, creating the core of its later wind-power division.
2000
Gamesa becomes publicly listed
[1]Siemens Gamesaen.wikipedia.org
Gamesa is admitted to the stock exchange.
1994
Gamesa Eólica is created
[1]Siemens Gamesaen.wikipedia.org
Gamesa establishes a subsidiary focused on wind-turbine manufacturing.
1991
Bonus turbines are installed at Vindeby
[1]Siemens Gamesaen.wikipedia.org
Eleven Bonus turbines are installed at Vindeby, an early offshore wind farm widely recognized as the world's first offshore wind farm.
1981
Danregn Vindkraft is established
[1]Siemens Gamesaen.wikipedia.org
The wind activities of Danish irrigation-equipment company Danregn are separated into a dedicated wind-turbine business.
1976
Gamesa predecessor is founded
[1]Siemens Gamesaen.wikipedia.org
Grupo Auxiliar Metalúrgico, the corporate predecessor of Gamesa, begins operations in Spain.

Products and positioning

A global wind-turbine original-equipment manufacturer with particular strength in large offshore machines, direct-drive technology and integrated turbine-service capabilities.

Offshore wind turbine
SG 14.0-222
A large offshore turbine based on Siemens Gamesa's D7 direct-drive platform. Its high rated capacity and very large rotor are intended for utility-scale offshore projects, where fewer machines can deliver a given project capacity. The model has been associated with projects in markets including Taiwan, the United Kingdom and the United States.
Offshore wind turbine · 2018
SG 8.0-167 DD
An 8 MW-class direct-drive offshore turbine developed from Siemens's large offshore platform. It uses a large rotor and permanent-magnet generator architecture and was selected for major United Kingdom offshore projects, including Hornsea-related development.
Offshore and onshore wind turbines · 2010
Siemens direct-drive platforms
A family of turbines using direct-drive generators rather than conventional gearboxes. Siemens developed the technology through prototypes in the late 2000s and introduced production designs from 2010 onward. The architecture was central to the company's offshore strategy because it reduced drivetrain complexity and supported progressively larger machines.
Onshore wind turbine
Gamesa onshore turbine platforms
The inherited Gamesa onshore portfolio served different wind regimes and project sizes across global markets. These platforms formed a major part of Siemens Gamesa's installed base and service business, but some later Gamesa models became associated with the quality problems disclosed in 2023.
Wind-energy services
Wind-turbine service
Operations, maintenance, inspections, repairs and long-term service agreements for installed wind turbines. Siemens Gamesa's service business covered equipment supplied by the combined company and, after the Senvion transaction, part of Senvion's European service fleet.

Controversies

2024
Blade defects at Odal Vind
Part of Norway's 163 MW Odal Vind onshore wind farm was shut down after manufacturing defects were identified in Siemens Gamesa-supplied blades.
Source
2023
Gamesa onshore turbine quality crisis
A technical review found defective components affecting a substantial share of certain Gamesa onshore turbine models. The issue created major expected inspection, repair and replacement obligations, contributed to a large fiscal-year loss and undermined confidence in the business. Siemens Energy subsequently sought external support and took full control of Siemens Gamesa.
Source
2020
Former Siemens Gamesa CMD initiates insolvency proceedings against company
Former Siemens Gamesa CMD Ramesh Kymal initiated insolvency proceedings against the company over non-payment of a financial settlement following his exit. Siemens Gamesa's counsel said the matter was sub judice and declined to comment.
Source
2020
GE files patent complaint against Siemens Gamesa
GE Renewable Energy filed a complaint with the US International Trade Commission seeking to block Siemens Gamesa turbines from the US market, alleging infringement of its intellectual property. Siemens Gamesa denied the allegation and said it would defend itself.
Source 1 Source 2 Source 3 Source 4

2023
Integrate Siemens Gamesa into Siemens EnergyStrategy
Background
A severe quality crisis and mounting losses weakened Siemens Gamesa's position as a separately listed company.
Action taken
Siemens Energy acquired the remaining shares and ended Siemens Gamesa's independent public listing.
Aftermath
The wind business continued as part of Siemens Energy rather than as an independently listed corporation.
Source
2019
Acquire Senvion's European service activitiesM&A
Background
Senvion's restructuring created an opportunity to expand Siemens Gamesa's European service footprint and installed-base coverage.
Action taken
Siemens Gamesa agreed to purchase Senvion's European service fleet and related activities.
Aftermath
The transaction broadened Siemens Gamesa's maintenance portfolio in Europe.
Source
2016
Combine Siemens Wind Power and GamesaM&A
Background
The two businesses sought greater scale across onshore, offshore and service markets and complementary geographic and technological capabilities.
Action taken
Siemens and Gamesa agreed to create a combined wind company, with Siemens holding a majority stake and the new company headquartered in Spain.
Aftermath
The transaction became effective in April 2017 and created Siemens Gamesa Renewable Energy.
Source

Recent events

2024
Vinod Philip appointed chief executive of Siemens Gamesa[9]Vinod Philip appointed chief executive of Siemens Gamesasiemens-energy.com
Leadership change
Siemens Energy appointed Vinod Philip to lead Siemens Gamesa, succeeding Jochen Eickholt.
2023
Siemens Energy takes full control of Siemens Gamesa[1]Siemens Gamesaen.wikipedia.org
M&A · Leadership change
Siemens Energy completed the process of acquiring the remaining Siemens Gamesa shares, ending the wind company's independent public listing.
2023
Siemens Energy secures support for recovery program[10]Siemens Energy secures support for recovery programsiemens-energy.com
Other · Regulation
After the wind-business crisis affected financing confidence, Siemens Energy reached an arrangement involving the German government and private banks to support its business and recovery program.
2022
Siemens Gamesa expands offshore-wind cooperation in Taiwan[1]Siemens Gamesaen.wikipedia.org
Other
The company announced cooperation involving Taiwanese green-material producer Swancor and an agreement associated with the installation of three gigawatts of offshore wind capacity in Taiwan.
2022
Siemens Energy launches voluntary takeover offer for Siemens Gamesa[11]Siemens Energy launches voluntary takeover offer for Siemens Gamesasiemens-energy.com
M&A
Siemens Energy announced an offer for the shares it did not already own, with the objective of taking Siemens Gamesa private and simplifying control of the wind business.
2021
Trading in Siemens Gamesa shares is temporarily suspended[1]Siemens Gamesaen.wikipedia.org
Regulation · M&A · Other
Spain's securities regulator suspended trading in Siemens Gamesa shares amid information concerning a possible future delisting. Trading resumed the following day.
2019
Siemens Gamesa agrees to acquire Senvion's European service fleet[1]Siemens Gamesaen.wikipedia.org
M&A
The company agreed to purchase Senvion's European service business, expanding its installed-base maintenance activities.
2018
Siemens Gamesa wins supply contract for Hornsea Two[1]Siemens Gamesaen.wikipedia.org
Product launch · Other
The company won a major offshore-turbine supply and maintenance contract for Ørsted's Hornsea Two project in English waters.
2018
Siemens Gamesa wins turbine supply contract for a major offshore wind farm[1]Siemens Gamesaen.wikipedia.org
Product launch · Other
The company secured a supply and maintenance role for an Ørsted offshore project in English waters, using SG 8.0-167 DD turbines.
2017
Siemens Gamesa merger becomes effective[1]Siemens Gamesaen.wikipedia.org
M&A
Siemens completed the combination of its wind-power business with Gamesa, creating Siemens Gamesa Renewable Energy as a major global wind-turbine supplier.

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