Edmundson also has significant presence in the Middle East through its associate company, Sentor Electrical,[5][6] which operates in Dubai, Abu Dhabi, Qatar, Ajman and agents in Kuwait, Bahrain and Oman.

[7] Through a number of holding and investment companies, it is directly controlled by the Delaware registered Blackfriars Corporation (now Marshire Holdings Corporation), controlled in turn by the Colburn family as part of their global electrical and prefabricated plastics organisation.

[21] According to a filing with Companies House, in October 2016, Marlow Investments Ltd changed the name to Plumbing And Heating Investments Ltd.[22][23] In the end of 2016, the company acquired East Anglia's leading plumbing wholesaler, Plumbcity Ltd[24][25] parent of Gallery Bathrooms Ltd, Plumbclick Ltd and Plumbclick.co.uk Ltd.

In the same month the company acquired the leading plumbers merchant in the South of England, Heating Plumbing Supplies Group Ltd[26] and its subsidiary Heating Plumbing Supplies Ltd.[26] The transaction significantly expanded the groups influence, with over 30 branches gained and revenue of more than £53 million in 2015, and adding to the pre existing presence through the East Midlands based merchant, G.B Willbond Limited.

[29] During the 2017 financial year the business acquired Acrylics Deutschland GmbH, Adhe-Rhone, Plumbstop Ltd and Schreine Kunstoffen BV for aggregated consideration of £14.8 million.