Who We Are

When our company was created, we had one goal – to establish a successful energy infrastructure business that would play an important role in maximising economic recovery in the North Sea.

Our first investment was in one of the most significant assets in the UK’s national infrastructure, the Central Area Transmission System (CATS); CATS is a successful and much valued part of our business and the foundation from which we continue to grow.

Owned by Antin Infrastructure Partners, we were originally named CATS Management Limited, after our signature investment.


Today, we are Kellas Midstream

We are intelligent, resourceful, patient and agile.

Characteristics which we are proud to embody, and which have played a key role in our success to date, these qualities share their DNA with the legendary Scottish wildcat from which we take our name – the Kellas.

In only five years, we have grown significantly – adding the Esmond Transportation System (ETS), and the Humber Gathering System (HGS) to our portfolio; and welcoming new people to our team, whose expertise has added great value to our organisation.

It is our people who will secure our future and fuel our continued growth – their collective experience, knowledge and commitment are at the core of our business and will drive us forward to further success.


Our history

Antin Infrastructure Partners became one of the first non-oil and gas companies to own a significant part of the UK Continental Shelf midstream infrastructure when it invested in the Central Area Transmission System (CATS) in 2014.

CATS Management was formed in the same year to manage Antin’s interests in the North Sea, including setting the strategy, delivering safe and efficient operational and financial performance, and growing the business.

Antin went on to acquire further equity in CATS in 2015, taking its stake to 99%.