International Track 200

Formerly part of the Sir Robert McAlpine group, RES has built or developed more than 195 wind farms worldwide, with a combined capacity exceeding 10 gigawatts. It has also diversified into solar power, energy storage and electrical transmission lines. With support for green energy growing, demand in America and France helped international turnover reach £851.1m in 2015 under chief executive Dr Ian Mays, 62. It hopes to have the same success in its new markets including Germany and Japan.

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Company details
Year2016
Rank57
CompanyRES
ActivityRenewable energy developer
LocationHertfordshire
2-yr av intl sales growth pa58.60%
International sales £000s851,088
Total sales £000s947,223
Staff1,456
Founded1982
Websitewww.res-group.com

If applicable:

* Supplied by company † Annualised figure