Six small companies became one large one

DONG Energy was established in 2006 by the merger of six Danish energy companies: DONG, Elsam, Energi E2, Nesa, Københavns Energi and Frederiksberg Forsyning. 


Liberalisation of the energy sector

DONG Energy’s six original companies have been involved in gas distribution since 1857 and electricity generation since it began in the early 20th century.


European liberalisation in the 1990s meant that the energy sectors of the EU member states could compete with one another. In order to survive in international competition, the six former DONG Energy companies elected to join forces.


Among other things, the merger made us better equipped for working on technological development in the energy field​.


Well equipped for the future 

The DONG Energy merger brought together a selection of all the expertise in the field of energy that the six companies had fostered and developed in close interaction with Danish society. So DONG Energy is a company with a long history, which is well equipped to meet the challenges and demands of the 21st century.


Click on the headlines below to read more about the milestones for each year:​​​




February 2017
DONG Energy has decided that by 2023, coal will no longer be used as fuel at the company's power stations.

February 2017
The annual report 2016 shows strong growth in the Group's EBITDA of 119% for the continuing operations.


December 2016
New partnership with Macquarie - 50% of Race Bank Offshore Wind Farm is divested to the Macquarie Group.

September 2016
Divestment of DONG Energy's Danish gas distribution grid is completed.

July 2016
Ownership shares in five producing Norwegian oil and gas fields are divested to Faroe Petroleum Norge AS

July 2016
Wins tender for Dutch offshore wind farms Borssele 1 and 2

June 2016
DONG Energy’s initial public offering and official listing on Nasdaq Copenhagen is completed. The final offer price per share was DKK 235.

May 2016
Confirms the intention to proceed with the next step towards an IPO and listing on Nasdaq Copenhagen. Barring unforeseen circumstances and subject to prevailing market conditions, the IPO could be launched for a listing in summer 2016.

May 2016
Agreement is signed with the state owned entity Energinet.dk under which Energinet.dk will acquire DONG Energy’s 100% ownership share in DONG Gas Distribution A/S. The divestment is part of the political agreement regarding DONG Energy’s Initial Public Offering.

March 2016
Bayerngas Norge and DONG Energy give notice to terminate the EPC contract with the Hejre supplier consortium. A key challenge for the project has been that the supplier consortium has not been able to meet its contractual commitments.

February 2016
50% of the UK offshore wind farm project Burbo Bank Extension is divested to PKA and the LEGO Group.

February 2016
Transmission assets at Westermost Rough is divested pursuant to the Offshore Transmission Owner (OFTO) regime.

February 2016
Final investment decision to build the giant Hornsea Project One offshore wind farm in the UK, with a capacity of 1.2 gigawatt (GW).

January 2016
A strategic review of E&P business is concluded. As part of a new portfolio strategy, investments to support future growth will be focused on renewable energy.


October 2015
DONG Energy has today decided to construct the 660MW Walney Extension Offshore Wind Farm, located in the Irish Sea, approximately 19 km off the west coast of Britain. The park will be the world’s biggest.

September 2015
Roadmap for IPO is concluded. DONG Energy intends to pursue an IPO within 18 months, and initiates preparations to allow the IPO to take place as soon as possible.

September 2015
Signes an agreement to divest 50 per cent of the 330MW German offshore wind construction project, Gode Wind 1, to Global Infrastructure Partners.

August 2015
Acquires the Hornsea Zone in the UK and the project rights to 3 GW offshore wind.

June 2015
Decides to construct Race Bank Offshore Wind Farm, located in the Greater Wash area, approximately 27 km off the east coast of Britain. Race Bank will have a capacity of up to approx. 580MW

April 2015
Agrees to take over RES Americas Developments Inc.’s more than 1000MW newly assigned development project rights off the coast of Massachusetts.

March 2015
DONG Energy Eldistribution is getting ready to replace approximately one million electricity meters in North Sealand, the Greater Copenhagen area and on Frederiksberg. The meter contract is awarded to Kamstrup

Februar 2015
The remaining 66.66% ownership interest in the UK offshore wind development Hornsea Project One is acquired from the joint venture partner SMart Wind.


December 2014
DONG Energy decides to construct the offshore wind farm Burbo Bank Extension located 8 km off the United Kingdom coast in Liverpool Bay. Burbo Bank Extension will consist of 32 MHI Vestas Offshore Wind V164-8.0MW wind turbines with a total capacity of 258MW.

October 2014
DONG Energy divests Stenlille Gas Storage Facility to Energinet.dk. The two parts have signed an agreement under which Energinet.dk will acquire DONG Energy’s 100% ownership stake in DONG Storage for a total consideration of DKK 2.25bn on a debt and cash free basis.

August 2014
Thomas Thune Andersen is elected new Chairman of the Board of Directors of DONG Energy A/S at the company's extraordinary general meeting.

July 2014
DONG Energy signs an agreement to sell 50 per cent of the 252 MW German offshore wind farm project Gode Wind 2 to a consortium of Danish pension funds (PKA, Industriens Pension, Lærernes Pension and Lægernes Pensionskasse) that will make 840,000 pension savers co-owners of the wind farm.

May 2014
In February 2014, DONG Energy announced a share programme aimed at employees and managers. The share programme process has now been completed. 3,078 of the employees in DONG Energy and 212 of the managers have chosen to subscribe for shares and consequently become co-owners of DONG Energy. They are investing a total of DKK 222 million in the company.

March 2014
DONG Energy signs an agreement to sell 50 per cent of the 210 megawatt UK offshore wind construction project Westermost Rough to Marubeni Corporation and UK Green Investment Bank.

March 2014
The New Chaiman of the Board of Directors of DONG Energy will be Thomas Thune Andersen.

February 2014
DONG Energy A/S: Capital increase completed, employee share scheme to be launched.

January 2014
DONG Energy divests 50 per cent of its share in London Array 1 offshore wind farm to Caisse de dépôt et placement du Québec.

January 2014
Fritz Schur to step down as chairman of DONG Energy A/S.

January 2014
the Danish Parliament's Finance Committee approved the agreement on capital investment in DONG Energy of approx DKK 13 billion. The investment comes partly from new investors, ATP, PFA, and Goldman Sachs, and partly from existing minority shareholders, SEAS-NVE, SYD ENERGI, Insero Horsens and Nyfors Entreprise.

January 2014
DONG Energy signs an agreement to divest its sales activities in the Netherlands – DONG Energy Sales B.V. – to Eneco.


December 2013
DONG Energy has acquired the remaining 50% interest in three Dutch offshore wind development projects from its joint venture partner SSE. The projects, Den Helder 1, Breeveertien II and West-Rijn, have a total consented capacity of up to 1,050 megawatt and are located in the North Sea off the coast of the Netherlands.

December 2013
DONG Energy acquires UK offshore wind development project Race Bank. The project has a total consented capacity of up to 580 megawatt and is located in the Greater Wash area approximately 27 km off the east coast of England.

December 2013
DONG Energy has signed and closed an agreement with a consortium of investors led by Macquarie Group’s Infrastructure and Real Assets business under which the consortium will acquire DONG Energy's gas-fired power station Severn in the UK.

November 2013
First oil produced from the phase 3 development of the Danish North Sea field Syd Arne.

November 2013
DONG Energy is selling the office premises in Gentofte to ATP and has entered into a long-term lease agreement.

November 2013
DONG Energy has decided to build the offshore wind farms Gode Wind 1 and 2 in the German part of the North Sea. The construction will represent a total investment of approximately EUR 2.2 billion (DKK 16.4 billion). 

October 2013
Investment agreement has been signed: Goldman Sachs funds, ATP and PFA to invest 11 billion in DONG Energy A/S. The final closing of the transaction is for the Danish State conditional on approval by the Finance Committee of the Danish Parliament.

October 2013
Carsten Krogsgaard Thomsen will step down as CFO after 11 years with DONG Energy. Marianne Wiinholt will be the new CFO.

September 2013
DONG Energy inaugurates Denmark’s largest offshore wind farm called Anholt.

July 2013
DONG Energy divests ownership interest (25.1%) in Stadtwerke Lübeck GmbH to STAWAG, Stadtwerke Aachen Aktiengesellschaft.

July 2013
The London Array, the world’s largest offshore wind farm was officially opened today.

July 2013
DONG Energy divests Norwegian power plant, Mongstad, to Statoil.

July 2013
DONG Energy's unit interest in one of its major assets, the Norwegian gas field Ormen Lange, has increased from 10.34% to 14.02%. 

June and July 2013
Exchange of hybrid capital and new issuances.

June 2013
DONG Energy divests its stake in the Swedish hydro power company Kraftgården AB to three Finnish energy companies.

June 2013
DONG Energy to divest onshore wind business in Denmark to SE and PFA.

May 2013
DONG Energy simplifies its corporate structure by combining the business units Energy Markets and Sales & Distribution into a single, integrated business unit under the name Customers & Markets. Customers & Markets will handle DONG Energy's customer-facing and market-facing activities.

April 2013

DONG Energy and Siemens AG have entered into agreements securing potential supplies and servicing of a total of 154 offshore wind turbines of 6 megawatt each, giving a total capacity of 924 megawatt. The agreements give DONG Energy the option to install the turbines on its Gode Wind projects in Germany from 2015.

April 2013
The heat companies Centralkommunernes Transmissionsselskab I/S (CTR), VEKS and DONG Energy have concluded a new heat agreement for Unit 2 of the Avedøre power station for the period until 2027. The agreement will involve expansion of the power station’s Unit 2 to enable it to be 100% fuelled by wood pellets in future. The biomass-based heat agreement ties in well with the ambitions of the heat companies VEKS and CTR to increase the share of biomass-based heat to the Greater Copenhagen area.

January 2013

DONG Energy to divest its Polish onshore wind business to PGE and Energa. The agreement includes three wind farms with a total installed capacity of 111.5 MW and a development portfolio of more than 700 MW.

January 2013
DONG Energy decides to build the offshore wind farm Westermost Rough in the North Sea on the British east coast. Westermost Rough will consist of 35 turbines from Siemens Wind Power, each of 6.0 megawatt, with a total capacity of 210 megawatt.

January 2013
DONG Energy is awarded  five new oil and gas licenses in Norway. Three of the new licenses are situated in the Norwegian Sea and two in the Norwegian part of the North Sea.


August 2012
DONG Energy acquires three German offshore wind development projects. DONG Energy has acquired a 100% ownership interest in three offshore wind development projects in Germany, Gode Wind 1, 2 and 3, from PNE Wind AG. The three projects have a total capacity of up to 900 megawatt and are situated in the German North Sea approx. 30 km northwest of the island of Norderney. 


July 2012
DONG Energy enters into a framework agreement with Siemens Energy on the supply and servicing of a total of 300 offshore wind turbines of six megawatt each. The turbines will be installed at selected DONG Energy offshore wind farms in the UK in the period 2014-2017.


May 2012
DONG Energy decides, in cooperation with AffaldVarme Aarhus (part of Aarhus Municipality’s Technical Services & Environment), to extend the service life of Unit 3 of Studstrup power station in Aarhus, so that the plant can continue in operation in the period to 2030. The investment is part of DONG Energy’s strategy to convert its central power stations to biomass.  


April 2012
DONG Energy’s Board of Directors decides to appoint Henrik Poulsen as the new CEO of DONG Energy. Henrik Poulsen comes from the post of CEO of TDC A/S.  He will take up his new role no later than 1 November 2012. 


April 2012
DONG Energy receives full consent to test two next-generation offshore wind turbines at its Gunfleet Sands 3 offshore wind farm in South East England. This is the first time that the Siemens 6 MW turbine is tested offshore and DONG Energy’s first demonstration project in the UK. 


March 2012 
A2SEA, which is owned by DONG Energy (51%) and Siemens Wind Power (49%), invests in a new jack-up vessel specially designed for the purpose of installing offshore wind turbines. The contract was signed with the Chinese shipyard COSCO Shipyard Group Co. Ltd. 


March 2012
Centrica and DONG Energy establish a joint venture to co-develop offshore wind projects in the Irish Sea Zone, which is part of the UK’s Round 3 and has a total capacity of 4.2 GW. 


March 2012
Anders Eldrup steps down as CEO of DONG Energy. 


February 2012 
DONG Energy and Bayerngas decide to develop the Hejre field in the Danish North Sea. DONG Energy is the operator and has a 60% stake in the field. Bayerngas owns 40%. The total investment in the development of the Hejre field is DKK 12.1 billion. DONG Energy’s share amounts to DKK 7.3 billion. 


February 2012
DONG Energy signs an agreement to sell 50% of the German offshore wind farm Borkum Riffgrund 1 to the LEGO Group’s parent company, KIRKBI A/S, and the Oticon Foundation, via its wholly-owned investment company, William Demant Invest A/S.


December 2011
DONG Energy acquires a 33.3% stake in the first two offshore wind farm projects in the Hornsea Zone from SMart Wind. 


November 2011
DONG Energy acquires the rights to further develop the German offshore wind project Borkum Riffgrund West 1 from Energiekontor AG for approx. EUR 30 million. 


October 2011
DONG Energy and Vestas enter into cooperation on testing of Vestas’ new V164-7.0 MW offshore wind turbine at DONG Energy’s demonstration site in the waters off Frederikshavn. 


October 2011
DONG Energy acquires the gas trading company Shell Gas Direct. 


September 2011
Marubeni Corporation enters into an agreement with DONG Energy on the acquisition of a 49.9% stake in the 172 MW Gunfleet Sands offshore wind farm.


August 2011
DONG Energy establishes a green energy consortium, Måbjerg Energy Concept, together with local players. Over the coming 15 months, the consortium is to determine whether a number of bioenergy projects are feasible and will be profitable.


August 2011
DONG Energy signs an agreement for an EUR 1.3 billion, five-year credit facility with two options to extend the agreement by a further year.


July 2011
DONG Energy acquires Noreco’s stake in the Siri field in the Danish North Sea for DKK 70 million. The transaction was completed at the end of 2011, and DONG Energy is now the sole owner of the field.


June 2011
DONG Energy and Bladt Industries sign an agreement for the supply of up to 600 foundations for DONG Energy's future offshore wind farms.


June 2011
DONG Energy sells Oil Terminals to Inter Pipeline.


June 2011
DONG Energy and ScottishPower Renewables decide to build the West of Duddon Sands offshore wind farm in the Irish Sea.


March 2011
PensionDanmark and PKA become co-owners of Denmark’s largest offshore wind farm, Anholt offshore wind farm.


February 2011
DONG Energy decides to build its first German offshore wind farm, Borkum Riffgrund (up to 320 MW).


February 2011
The gas-fired Severn power station in Wales is inaugurated.


November 2010
DONG Energy - together with the operator Hess and the licence partners – decides to invest in further development of the North Sea field Syd Arne. DONG Energy's share of the investment amounts to about DKK 2.5 billion.


October 2010
Due to expected lower electricity consumption, DONG Energy decides to phase out Unit 3 at Ensted Power Station and Unit 2 at Stigsnæs Power Station.


October 2010
DONG Energy concludes contracts with the Dutch energy company De Nederlandse Energie Maatschappij. The number of supplied customer accounts in the Netherlands will increase from approx. 150,000 to approx. 380,000. 

September 2010
PensionDanmark becomes co-owner (30%) of Nysted offshore wind farm.


July 2010
DONG Energy agrees development plan for the Norwegian Marulk gas field, in which DONG Energy has a 30% stake. 


June 2010
DONG Energy is awarded the concession to build Anholt offshore wind farm (400 MW).


March 2010
DONG Energy and Total to jointly develop the two gas fields Laggan and Tormore in the West of Shetlands region. DONG Energy has a 20% stake.


March 2010
DONG Energy signs an agreement with Spanish Iberdrola for Iberdrola to deliver liquefied natural gas (LNG) corresponding to about 1 billion m3 of natural gas per year from the end of 2011. 


February 2010
The Nini Øst field produces its first oil. DONG Energy is the operator.​

2009 - 2000

December 2009
DONG Energy withdraws from project exploring the opportunities to build a power station in Greifswald in  Germany.


November 2009
DONG Energy inaugurates Inbicon near Kalundborg, one of the world’s first demonstration plants for the production of second-generation bioethanol based on straw and similar waste products.


November 2009
Fibre optic network sold to TDC.


October 2009
DONG Energy and Gazprom sign a contract for Gazprom to deliver 1 billion m3 of natural gas per year via the Nord Stream pipeline in the Baltic Sea for a period of 18 years starting from 2012. The natural gas is to be delivered at the Danish-German border.


October 2009
Due to declining demand for electricity DONG Energy decides to shut down Unit 5 at Asnæs Power Station and Unit 4 at Studstrup Power Station.


September 2009
DONG Energy acquires 83.57% of the shares in the German wholesale trading company KOM-STROM AG in Leipzig. 


September 2009 
Inauguration of the Horns Rev 2 offshore wind farm, which is located 30 km off Blåvands Huk on the west coast of Denmark. With a capacity of 209 MW, this is the world’s largest offshore wind farm.


August 2009
DONG Energy decides to build and operate the Nygårdsfjell 2 wind farm in Narvik in Norway.


June 2009
DONG Energy acquires A2SEA, a specialist shipping company specialising in the installation of offshore wind turbines and foundations. The company owns four installation vessels. 


May 2009
DONG Energy and partners E.ON and Masdar decide to build the world’s largest offshore wind farm, London Array (630 MW), in the Thames Estuary.


April 2009
DONG Energy decides to build the Walney 1 and 2 offshore wind farms in the Irish Sea.

March 2009
DONG Energy and Siemens Energy Sector sign an agreement for the supply of up to 500 offshore wind turbines with a total capacity of up to 1,800 MW. The wind turbines will be installed on DONG Energy’s coming offshore wind farms in Northern Europe.


February 2009
DONG Energy is awarded its first two licences, including one as operator, in the Barents Sea off the northern coast of Norway. 3D seismic data will be acquired during the summer.


January 2009
DONG Energy’s decides to sell its stakes in Frederiksberg Forsyning A/S and Frederiksberg Forsynings Ejendomsselskab.


December 2008
DONG Energy decides to build a large second-generation bioethanol plant in Kalundborg.


August 2008
CARE Danmark and DONG Energy sign a collaboration agreement on the development of energy projects that reduce CO2 emissions while at the same time helping people in Ghana and Vietnam.


July 2008
DONG Energy participates as operator of exploration in West Greenland. Seismic surveys are performed in 2008.


June 2008
DONG Energy decides to build and operate the Karnice 1 onshore wind farm in Poland. The farm will have a total capacity of 30 MW.


June 2008
First sod cut at Gate Terminal in Rotterdam, which is designed to handle liquefied natural gas (LNG). DONG Energy is a partner in the international consortium that owns the terminal. DONG Energy will have more than 3 billion m3 (36.5 TWh) of the terminal’s capacity at its disposal for 20 years starting from 2011, equivalent to 25% of the terminal’s total import capacity.


June 2008

DONG Energy sells its Greek wind power activities.


February 2008
DONG Energy decides to build and operate the Storrun wind farm in Krokum in Sweden. The farm will have a capacity of 30 MW.


January 2008
The IPO of DONG Energy is suspended.


December 2007
DONG Energy agrees to sell its 132 kV electricity transmission network in North Zealand to Energinet.dk as part of the restructuring of the Danish electricity sector. The selling price is DKK 2 billion.


December 2007
DONG Energy signs an agreement on a Dutch LNG terminal.


December 2007
A decision is made to build two new offshore wind farms - Walney Island and Gunfleet Sands II. The farms will have a net capacity of 151 MW and 65 MW respectively and are scheduled for operation in 2010. The total investment is expected to amount to DKK 5.2 billion.


October 2007
DONG Energy inaugurates the Burbo Bank offshore wind farm in the UK.


October 2007
Inauguration of the Ormen Lange field, of which DONG Energy owns 10%.


August 2007
DONG Energy divests its Spanish renewables portfolio (former subsidiary of Energi E2) to E.ON. The selling price is EUR 722 million.


May 2007
DONG Energy builds a further Danish offshore wind farm - Horns Rev II. The farm will have a net capacity of 209 MW and is scheduled for operation in 2009. The investment is expected to total DKK 3.5 billion.


March 2007
DONG Energy increases its stake in the Hejre field from 20% to 50% by acquiring ConocoPhillips Petroleum’s E&P activities in Denmark.


February 2007
DONG Energy and Wingas in Germany agree to collaborate on gas exchange for the next 13 years.


August 2006 
DONG Energy announces the sale of the Lille Torup gas storage facility to Energinet.dk, effective from May 2007. The selling price is DKK 2 billion.


July 2006 
The DONG Energy merger is complete. 27% of the shares in DONG shift from the Danish State to nine utility companies. Their ownership of assets involved in the merger puzzle make them shareholders in the new DONG Energy.


March 2006 
EU competition authorities approve the merger plans that will result in the creation of DONG Energy. The approval is conditional upon the divestiture of one of DONG’s two gas-storage facilities. The 132 kV transmission grid in northern Zealand also has to be divested.


May 2005 
Vattenfall, which owns 35 % of the shares in Elsam, and DONG announce that they plan to split assets in Elsam and Energi E2. Three central plants (Amagerværket, Fynsværket and Nordjyllandsværket), two decentralised gas-fired plants in Zealand, a portfolio of Danish and international wind activities, and a 30% stake in a German wind development is transferred to Vattenfall. DONG receives Vattenfall’s 35% stake in Elsam and 40% stake in the Avedøre 2 power plant.


February 2005 
DONG purchases Københavns Energi’s (KE) electricity activities. The agreement includes KE’s 34% share of Energi E2. The combined cost will be DKK 10.5 billion. 

DONG also purchases Frederiksberg Forsyning and their 2.26% stake in Energi E2 for DKK 1 billion in cash, plus 3.63% of the shares in Energi E2 from four municipalities DKK 617 million in cash.


December 2004 
On 10 December, DONG and Elsam announce their planned merger.


August 2004 
DONG purchases additional shares in Elsam through EnergiGruppen Jylland, bringing the total DONG share to around 24%.


June 2004 
DONG increases its share in Elsam to 17.7%, an increase of 8.9%.


March 2004 
EnergiGruppen Jylland buys approximately 6% of the shares in Elsam, bringing its stake to roughly 9%.


October 2003 
Elsam acquires 78.8% of NESA at a price valuing NESA at DKK 10.5 billion, subsequently leading to the purchase of NESA. 


January 2003 
DONG acquires a 64% share in EnergiGruppen Jylland, which owns 3.1% of Elsam.


DONG buys Statoil’s explorations and production activities in Denmark and becomes the operator of the Siri field. The company buys 16% of the shares in the electric company NESA. DONG becomes the lead investor in the venture foundation “New Energy Solutions”, focusing on renewable energy and new energy forms.​

1999 - 1990

The Siri and the Syd Arne fields are put into production. DONG purchases the municipally owned distribution company Naturgas Syd. The company takes part in two licenses in the Dutch and German part of the North Sea, close to the Danish border. DONG participates in a consortium, preparing exploration licensees close to the Faroe Islands and along the boundary between the United Kingdom and the Faroe Islands.


DONG, Statoil, Phillips, and Nunaoil are awarded an exploration licence in Western Greenland.

The Lulita field in the North Sea goes into production. For the first time ever, DONG becomes a manufacturer of oil and natural gas in Denmark with a 13.6% share in the field. 


DONG purchases 10% of the shares in the Swedish company Vattenfall Naturgas AB.


DONG opens its second subterranean natural gas storage facility. It is situated at Stenlille, Denmark, close to Sorø.​

1989 - 1980

DONG opens its first subterranean natural gas storage facility in Ll.Torup. 


The pipeline from the North Sea to Fredericia is completed and transportation starts on 1 May. The law concerning DONG’s placement in the explorations licensees goes into effect. In the first tender round, DONG becomes part of eight groups of oil companies jointly awarded 16 exploration licensees.

The Danish Underground Consortium begins delivery on 1 October. Queen Margrethe of Denmark opens the valve at the inauguration at Nybro Gasbehandlingsanlæg. 


DONG founds Dansk Olierør A/S which begins the construction of an oil pipeline from the North Sea to Fredericia, Denmark.​

1979 - 1972

The Danish Parliament decides to introduce natural gas in Denmark. The planning of the natural gas distribution net is initiated. DONG is allocated the exclusive rights for import, trade, transmission, and storage of natural gas in Denmark. The company enters into its first natural gas contract with the Danish Underground Consortium. The first of a total of five municipally owned regional distribution companies is established to handle the sale of natural gas to small and medium sized consumers.


2 December, DNG changes its name to Dansk Olie og Naturgas A/S (Danish Oil and Natural Gas, DONG).


27 March, Dansk Naturgas A/S is founded (Danish Natural Gas, DNG).​​




Read more about our work with sustainability




Facts about DONG Energyhttp://www.dongenergy.com/en/about-us/dong-energy-in-brief

DONG Energy is one of the leading energy groups in Northern Europe. We are headquartered in Denmark.

Read more about DONG Energy here