Red Eléctrica de España

Red Eléctrica de España, commonly known as REE, is the Spanish corporation responsible for operating the country’s high-voltage electricity transmission system. It is a partly state-owned, publicly listed infrastructure company whose central role is to maintain the balance between electricity generation and demand, coordinate the national transmission network, and support the reliability and security of Spain’s power system. Its activities place it at the center of Spain’s energy transition, including the integration of renewable generation, cross-border interconnection, system planning, and the management of the grid under changing patterns of electricity production and consumption. The company was established in 1985 by the state-owned industrial holding Instituto Nacional de Industria. Its creation was intended to provide Spain with a unified national transmission network rather than leaving the strategic grid fragmented among electricity companies. REE subsequently became a public limited company and was admitted to trading on the Bolsa de Madrid. SEPI, the Spanish state holding company, retains a significant strategic stake of up to 20%, while the remainder is held by free-float investors. This ownership structure combines public oversight of a critical national asset with access to public capital markets. REE’s primary business is regulated electricity transmission in Spain. The company owns and operates high-voltage lines, substations, interconnection infrastructure, and related control systems. Unlike an electricity retailer, it does not primarily sell power to households or businesses. Its function is to provide the infrastructure and operational coordination through which electricity generated by power stations and renewable facilities reaches distribution networks and major users. The company also participates in the operation and development of electricity systems outside Spain, with assets and subsidiaries in Latin America and a strategic investment in Portugal’s transmission-system counterpart, Redes Energéticas Nacionais. International expansion has included ownership of transmission assets in Peru and former ownership of Transportadora de Electricidad in Bolivia. REE acquired more than 99% of the Bolivian company in 2002, but Bolivia nationalized the subsidiary in 2012. A compensation agreement reported in 2014 provided for a payment of $36.5 million. In Peru, REE owns REDESUR and reached full ownership in 2017 after acquiring the remaining stake. REDESUR operates transmission infrastructure in southern Peru and controls interests in the Tesur companies. These investments broadened REE’s business beyond Spain but also exposed the company to political and regulatory risks associated with strategic infrastructure ownership. REE formerly operated in telecommunications through its Albura unit, which had access to approximately 7,500 kilometers of optical-fiber network. That activity was sold in 2005 to T-Online, a Deutsche Telekom subsidiary, for €61.5 million, reflecting a decision to concentrate the group more closely on electricity transmission and related infrastructure. The company has also maintained a strategic relationship with Portugal’s Redes Energéticas Nacionais through a 5% ownership interest. The brand’s positioning is that of a regulated, technically specialized, and systemically important infrastructure operator rather than a consumer-facing energy retailer. Its public role requires attention to continuity of supply, engineering standards, environmental impact, biodiversity, and the compatibility of new generation projects with grid capacity. REE remains active and is particularly relevant to debates about renewable-energy integration, grid resilience, Iberian interconnection, and the long-term modernization of Spain’s electricity system.

Red Eléctrica de España was created in 1985 by Instituto Nacional de Industria, Spain’s state industrial holding structure, to establish a unified national electricity transmission network. Before its creation, transmission responsibilities were more closely associated with individual electricity companies. The new organization introduced a dedicated system operator and transmission-infrastructure entity, separating the strategic management of the grid from generation and retail activities. Over time, REE developed into a public limited company and became listed on the Bolsa de Madrid. Its ownership remained partly public: SEPI holds up to 20%, while the balance is available to public investors. This arrangement reflects the strategic importance of the transmission network and the company’s role as a regulated monopoly. REE’s principal responsibilities include operating Spain’s high-voltage grid, maintaining system security, coordinating generation and demand, and developing infrastructure required for a reliable electricity supply. The group expanded internationally during the 2000s. In 2002, it acquired more than 99% of Transportadora de Electricidad, known as TDE, from Unión Fenosa in Bolivia. The subsidiary operated a substantial share of Bolivia’s interconnected transmission network and represented an important Latin American investment. The Bolivian government nationalized TDE on 1 May 2012, arguing that the transmission assets had previously belonged to the state and that the country should recover strategic infrastructure. The action generated criticism from Spanish officials, business representatives, and the European Commission, who emphasized investment protection and legal certainty. REE and Bolivia later reached a compensation arrangement reported in 2014, under which Bolivia agreed to pay $36.5 million. REE also built a presence in Peru. It owns REDESUR, the transmission company operating in southern Peru, and reached 100% ownership in 2017 after purchasing the remaining 45% stake. REDESUR controls all of Transmisora Eléctrica del Sur and 75% of Transmisora Eléctrica del Sur 2. The company has additionally held a 5% interest in Portugal’s Redes Energéticas Nacionais, supporting a strategic relationship with the neighboring country’s transmission-system operator. The group has not pursued every infrastructure opportunity under the REE name. In telecommunications, it formerly operated Albura, a business associated with approximately 7,500 kilometers of optical-fiber network. In 2005, Albura was sold to T-Online, a Deutsche Telekom subsidiary, for €61.5 million. The divestment narrowed the company’s focus and reinforced electricity transmission as its core business. Environmental stewardship has been presented as an important part of REE’s infrastructure role. Transmission construction and operation require management of landscape, biodiversity, and ecological impacts, particularly as Spain adds renewable generation and needs additional grid capacity. The company’s relevance has consequently grown alongside the expansion of wind and solar power, which require system coordination and network investment because generation is often distant from consumption and varies with weather conditions. On 28 April 2025, a major outage affected the Iberian Peninsula. The referenced account states that a cyberattack was ruled out. The incident placed renewed attention on the resilience and operation of the transmission system and on REE’s position as a critical national infrastructure operator. REE remains active, publicly listed, and centered on Spanish transmission-system operation while maintaining selected international assets.

• 2025

  Iberian Peninsula power outage

  [1]Red Eléctrica de Españaen.wikipedia.org

  A large outage affected Spain and Portugal on 28 April; the referenced account says a cyberattack was ruled out.

• 2017

  Full ownership of REDESUR

  [1]Red Eléctrica de Españaen.wikipedia.org

  REE reached full ownership of the Peruvian transmission company REDESUR after acquiring the remaining 45% stake.

• 2014

  Compensation agreement with Bolivia

  [1]Red Eléctrica de Españaen.wikipedia.org

  Bolivia agreed to compensate REE with $36.5 million for the nationalized subsidiary.

• 2012

  Nationalization of Bolivian subsidiary

  [1]Red Eléctrica de Españaen.wikipedia.org

  Bolivia announced and implemented the nationalization of Transportadora de Electricidad.

• 2005

  Sale of Albura telecommunications unit

  [1]Red Eléctrica de Españaen.wikipedia.org

  REE sold Albura and access to approximately 7,500 kilometers of optical-fiber network to T-Online, a Deutsche Telekom subsidiary, for €61.5 million.

• 2002

  Acquisition of Transportadora de Electricidad

  [1]Red Eléctrica de Españaen.wikipedia.org

  REE acquired more than 99% of Bolivia’s Transportadora de Electricidad from Unión Fenosa.

• 1985

  Creation of Red Eléctrica de España

  [1]Red Eléctrica de Españaen.wikipedia.org

  Instituto Nacional de Industria created REE to provide Spain with a unified national electricity transmission network.

Regulated, strategically essential electricity-transmission and grid-infrastructure operator.

• Electricity transmission · 1985

  Spanish electricity transmission system

  REE operates Spain’s high-voltage electricity transmission infrastructure, including transmission lines, substations, interconnection facilities, and associated control systems. The service connects generation with distribution networks and large users while supporting continuity, system security, and the physical movement of electricity across the country.

• System operation · 1985

  Electricity-system operation and balancing

  As system operator, REE coordinates electricity production and demand in real time, manages network constraints, and helps maintain the technical balance required for a stable grid. This function is increasingly important as variable wind and solar generation becomes a larger part of Spain’s electricity mix.

• International transmission infrastructure

  REDESUR transmission assets

  Through REDESUR, REE owns and operates electricity-transmission infrastructure in southern Peru. REDESUR also controls Transmisora Eléctrica del Sur and holds a majority interest in Transmisora Eléctrica del Sur 2, extending the group’s transmission-infrastructure activities beyond Spain.

• 2012

  Bolivian nationalization of Transportadora de Electricidad

  Bolivia nationalized REE’s TDE subsidiary, prompting criticism from Spanish officials and the European Commission over investment security and compensation. The dispute was later addressed through a compensation agreement reported in 2014.

  Source

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• 2017

  Completion of REDESUR ownershipM&A

  Background

  REE continued developing its Peruvian transmission platform.

  Action taken

  The company acquired the remaining 45% of REDESUR and reached full ownership.

  Aftermath

  REE obtained complete control of the southern Peruvian transmission company and its associated interests.

  Source

• 2005

  Divestment of AlburaStrategy

  Background

  REE was active in telecommunications through an optical-fiber network connected to its infrastructure activities.

  Action taken

  It sold Albura and access to approximately 7,500 kilometers of optical fiber to T-Online.

  Aftermath

  The sale concentrated the group more closely on electricity transmission and related grid infrastructure.

  Sale price. €61.5 million (2005 transaction)

  Source

• 2002

  Expansion into Bolivia through TDE acquisitionM&A

  Background

  REE sought to expand its electricity-transmission infrastructure portfolio outside Spain.

  Action taken

  The company acquired more than 99% of Transportadora de Electricidad from Unión Fenosa.

  Aftermath

  The Bolivian subsidiary was nationalized in 2012, leading to a compensation process that resulted in a reported $36.5 million payment in 2014.

  Source

1. 1Red Eléctrica de Españaen.wikipedia.org
2. 2Red Eléctrica de España official websiteree.es