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The Weir Group PLC operates in three segments: Minerals, Oil and Gas, and Power and Industrial:
Founded as G. and J. Weir
1969 Acquired Osborn-Hadfield Steel Founders which, with the existing subsidiaries, would make the second largest foundry group in Britain; Osborn-Hadfield was 59 percent owned by Samuel Osborn and Co and 41 percent by Dunford and Elliott.
1976 The Alston foundry closed
2005 Purchased Pompe Gabbioneta, an Italian pump manufacturer for £69m
2005 July: Weir sold its desalination and water treatment businesses, (Weir Westgarth, Weir Entropie and Weir Envig) to Veolia Water Systems, part of the water division of Veolia Environnement: Weir Westgarth had been a pioneer of the multi-stage flash distillation process used predominately to produce desalinated water from seawater.
2007 Weir acquired SPM Flow Control, Inc for US$653 million (£328 million). SPM manufactures high-pressure well service pumps and related flow control equipment
2007 Acquired African pumps business, C. H. Warman Pump Group for $231m (£113m)
2008 Acquired Messa Manufacturing Inc, the Texan based pump manufacturer for $40m
2010 Bought Malaysia-based Linatex for £138m
2010 Agreed to acquire Indian valves manufacturing business, BDK Engineering Industries
2010 March: acquired Petroleum Certification Services
2010, September: acquired Linatex group of companies
2010 October: acquired BDK Engineering Industries Limited.
2010 November: acquired American Hydro Corporation.
2010 November: Acquired American Hydro Corporation, which made turbines for hydro-electric power stations
2010 November: Weir and Shengli Oilfield Highland Petroleum Equipment Co. announced the formation of a joint venture to provide high-pressure well service pumps and related flow control equipment to the developing shale gas industry in China.
2010 December: acquired 76% of Ynfiniti Engineering Services SL.
2011 Agreed to acquire a 60% interest in the South Korean valves business formerly operated by HIM Tech Co Ltd
2011 Purchased Seaboard Holdings Inc a Houston based wellhead solutions provider for US$675m (£431m)
2015 Revenue £1.9bn. Divisions are Weir Minerals, Weir Oil and Gas, and Weir Power and Industrial. Employ 14,720 persons worldwide.