Hyder Consulting PLC and Arcadis announced last week that the cash acquisition of Hyder by Arcadis UK Investments B.V., a wholly-owned subsidiary of Arcadis N.V. has now become effective.

In late August, Hyder Consulting's Board recommended to its shareholders accepting an increased offer from Arcadis following a rival offer from Japanese engineering company, Nippon Koei. Arcadis finally offered a much-improved £288 million (US$489 million), +12% respect to its first offer $433.3 million

Hyder is one of the world's longest established engineering consultancies, with a heritage that spans over two centuries. Headquartered in the UK, Hyder operates in Asia, Australia, the Middle East, Germany and the United Kingdom.

Hyder employs approximately 4,500 people and applies global expertise coupled with local knowledge to create award winning solutions for the transport, property, utilities and environment sectors.

Hyder has been listed on the London Stock Exchange since 2002, and reported revenues and EBITDA for the year ended 31 March 2014 of £296.8 million and £23.6 million respectively.

The companies also announced that Hyder's shares were delisted from the London Stock Exchange last week.