DDASA on Oslo Stock Exchange

Dolphin Drilling

Logo: dolphindrilling.no4

Offshore drilling company

Dolphin Drilling Holdings Limited is an offshore drilling rig company headquartered in Aberdeen, Scotland, United Kingdom with its main subsidiary Dolphin Drilling AS located in Sandnes, Norway. Until 2019, Dolphin Drilling had its headquarters in Oslo, Norway. The company is most known for having operated the Byford Dolphin drilling rig, which was the site of an explosive decompression incident in 1983, killing five people.2 Its chief executive is Ivar Brandvold.1 It employed 1,245 people.1 Its revenue was NOK 4.3 million in 2007.1 Its shares trade on Oslo Stock Exchange under the symbol DDASA.1 Wikipedia text CC BY-SA 4.0

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Last updated Oct 21, 2026.

Overview

Apr 11, 1997Founded1

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  • TickerDDASA on Oslo Stock Exchange1
  • Industrydrilling rig1
  • HeadquartersOslo1
  • Websitedolphindrilling.no
  • Legal formallmennaksjeselskap1
  • LEI213800HA8RPX3LW25M743
  • StatusActive3
  • LEI statusLapsed (not renewed)3
  • Registered addressFRED OLSENS GATE 2, 0152 Oslo, Norway3
  • Registered withThe Brønnøysund Register Centre, 9773882873
Dolphin Drilling image from its website
Image: dolphindrilling.no4

Dolphin Drilling Holdings Limited is an offshore drilling rig company headquartered in Aberdeen, Scotland, United Kingdom with its main subsidiary Dolphin Drilling AS located in Sandnes, Norway. Until 2019, Dolphin Drilling had its headquarters in Oslo, Norway.2

Corporate structure

Dolphin Drilling sits at the top of its group. 2 entities, 2 countries on record. Switch between the flow chart and the network, and select any entity to see its details.

Built from parent and subsidiary links from GLEIF, the Global Legal Entity Identifier Foundation (CC0); subsidiaries, stakes and holdings from Wikidata (CC0). Each entity in the chart links to its source.

What it owns

What Dolphin Drilling reports owning in its annual reports to the SEC: buildings, land and equipment, real estate and locations, investments, intangible assets and inventory, at the end of its latest fiscal year and a year before.

Stakes and holdings (Wikidata)

Things Wikidata records the company as owning, with the share when stated.1

The story

In 1965, A/S Aker Drilling Company Ltd. (Dolphin Drilling) was established. In 1976, Fred. Olsen & Co. acquired Aker Drilling Services, and renamed it Dolphin Services A/S.

In 1997, based on Dolphin Services A/S, the Fred. Olsen Energy ASA was formed. The company was listed on Oslo Stock Exchange with the tickers FOE and later DDASA. In 1998, its remotely operated vehicle division was sold to Stolt Comex Seaways (now Subsea 7). In 2003, Dolphin Well Services AS was sold to PSL Energy Services Limited.

Fred. Olsen Energy ASA was renamed to Dolphin Drilling ASA in December 2018. In June 2019, Dolphin Drilling filed for bankruptcy. The main shareholders that time were the companies Bonheur and Ganger Rolf ASA, controlled by the Olsen family. A debt investor SVP Global acquired more than 90% of the company's debts and transferred its operating subsidiaries to a new Jersey-registered holding company, Dolphin Drilling Holdings Limited. Shortly afterwards, the international headquarters of the company were moved to Aberdeen.

In May 2022, it was announced that Cyprus-headquartered oilfield services company, SD Standard ETC had acquired a 25% stake in Dolphin Drilling, as part of a $10 million USD deal.

As of March 2025, Dolphin Drilling AS underwent changes in its ownership structure:

March 3, 2025: S.D. Standard ETC Plc (SDSD) announced its intention to sell its entire 17.1% stake in Dolphin Drilling AS through a private placement.

March 4, 2025: SDSD completed the sale of 49,784,706 shares at NOK 1.1 per share, totaling approximately NOK 55 million, thereby fully divesting its holdings in the company. SVP remains the owner of c. 24% of the company.

March 13, 2025: Svelland Capital and B.O. Steen Shipping increased their respective shareholdings in Dolphin Drilling to 34% and 10%.

From Wikipedia’s article on Dolphin Drilling, shared under CC BY-SA 4.0.5

Leadership

Who has led Dolphin Drilling, and when. Pick a name to see everywhere that person has worked.

Products and brands

  • drilling rig

Listed on Wikidata.1

Fleet owned and operated:

1 deepwater drilling rig Blackford Dolphin - 7 000 ft water depth

2 Mid water semi submersible drilling rigs, Borgland Dolphin and Paul B. Loyd Jr.

From Wikipedia’s article on Dolphin Drilling, shared under CC BY-SA 4.0.5

Subsidiaries and ownership

Also owns

From Wikidata.1

Revenue over time

As stated on Wikidata, in the currency reported.

Revenue

  • 20074.3M NOK1

Net income

  • 20071.4M NOK1

Timeline

  1. Oct 15, 1997Went public Listed on Oslo Stock Exchange1
  2. Apr 11, 1997Founded Founded1

Sources

The numbers on this page point here. Each one links to the record it came from.

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    Company websiteDolphin Drilling logo
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