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Our History

Subsea7 has been operating in the most challenging and unexplored environment on the planet – the vast, deep waters of our seas and oceans. The company carries out projects in every part of the globe to meet the ever-changing energy needs of our clients and society.

Explore our history

Subsea 7 was created on May 23, 2002 as a joint venture between DSND and Halliburton Subsea. In 2004, DSND acquired Halliburton’s stake in the joint venture and floated the business as Subsea 7 Inc on the Oslo Børs in Norway. In January 2011, Subsea 7 Inc combined with Acergy S.A. to form Subsea 7 S.A., that remains listed on the Oslo Børs with SUBC as its ticker.

Legacy companies

Subsea7 has a twenty-year history but it can trace its roots to over 25 different legacy companies and businesses which, since the 1950’s have evolved and overcome a succession of daunting subsea and marine challenges and, in the process, created the world-leading offshore contractor we are today. 

Our timeline shows the historical relationships between the companies which ultimately came together as Subsea 7.


Our tradition of innovation

Subsea7’s success has been built on developing and applying remarkable technological advances in diving, remote intervention, pipelay and marine construction. The pioneering work it has undertaken through the years has become vastly more complex and the contracts significantly larger. In response, Subsea7 has increased the size and capabilities of its marine assets and high-performance equipment as well as enhancing the onshore operational services that support them.

Investing in offshore wind

Today, Seaway7, part of the Subsea7 Group, is a global leader in the delivery of offshore wind projects, with an established position in the renewables supply chain, providing our clients with foundation installation, turbine installation, cable lay and transportation services for the construction of offshore wind farms.

Inspiring people

To celebrate the twentieth anniversary of its creation, Subsea7 has published a book entitled 'Inspiring People' which, in addition to being a historical narrative of its achievements, supported by facts and photographs, provides insights into the drive, entrepreneurial spirit and vision of its legacy companies’ founders as well as interviews with senior executives and employees, both past and present.

Although our industry has evolved drastically over the last fifty years as it adapted to the technological and logistical challenges of sourcing energy offshore, our story is fundamentally about a community of people with exceptional skills, knowledge and dedication working collaboratively towards a common goal. This is reflected in the title of the book and we encourage you to read our abridged version.

Read our book 'Inspiring People'