Assemblin completes acquisition of Tom Allen Senera

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Assemblin has completed its acquisition of Tom Allen Senera, Finland’s leading systems supplier of energy solutions to properties.

Assemblin’s acquisition of Tom Allen Senera, which was announced in a press release on 24 May 2021, has now been approved by the Finnish competition authorities and has subsequently been finalised with immediate effect. The acquisition results in Assemblin’s Finnish operations growing by slightly more than 90 employees and annual sales exceeding SEK 300 million.

“Tom Allen Senera is a leader in Finland with regard to designing and installing energy systems with efficient energy recovery, often integrated with modern geothermal heating solutions, contributing to a more energy-efficient and environmentally friendly society. We are pleased to now be able to welcome Tom Allen Senera’s employees and customers to the Assemblin Group. We look forward to continuing our mutual development towards our shared vision of creating smart and sustainable installations in different types of buildings,” says Mats Johansson, President and CEO of Assemblin.

For further information on Tom Allen Senera, please see

For further information, contact:

Philip Carlsson, CFO, Assemblin,, +46 10 475 39 50

Åsvor Brynnel, Head of Communications and Sustainability, Assemblin,, +46 10 475 39 48

About Assemblin

Assemblin is an end-to-end installation and service partner with operations in Sweden, Norway and Finland. We design, install and maintain technical systems for air, water and energy. Our vision is to create smart and sustainable installations that make buildings work and people feel comfortable. We make this possible through close local collaboration and are supported by a strong organisation. We have annual sales of SEK 10 billion and about 5,900 dedicated employees at more than 100 locations in the Nordic region. Read more at




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