Holding(s) in Company

Weir Group PLC
15 August 2006


                               The Weir Group PLC

                                                                  15 August 2006



The Weir Group PLC (the 'Company') received notice from Threadneedle Asset
Management Holdings Limited on 15 August 2006 that, for the purposes of Section
198 of the Companies Act 1985, Ameriprise Financial, Inc and its group hold the
following notifiable interest in the Ordinary shares of the Company.



Registered Owner                                         Ordinary 12.5p shares
------------------                                       -----------------------

Bank of Ireland Nominees                 A/c 4239914                   348,632
Bank of Ireland Nominees                 A/c 4270483                   556,720
Bank of Ireland Nominees                 A/c 4261416                   248,537
BNY (OCS) Nominees Ltd                   A/c 219064                    225,353
Littledown Nominees Ltd                  A/c 35822                      21,000
Littledown Nominees Ltd                  A/c 11121                      14,000
Littledown Nominees Ltd                  A/c 10479                       9,000
Littledown Nominees Ltd                  A/c 07203                      84,928
Littledown Nominees Ltd                  A/c 21667                      56,000
Littledown Nominees Ltd                  A/c 34789                     173,858
Littledown Nominees Ltd                  A/c 07207                     400,969
Littledown Nominees Ltd                  A/c 07196                      60,729
Littledown Nominees Ltd                  A/c 27642                     419,560
Littledown Nominees Ltd                  A/c 05576                   1,259,834
Littledown Nominees Ltd                  A/c 03449                   1,410,402
Littledown Nominees Ltd                  A/c 07197                     224,075
Littledown Nominees Ltd                  A/c 10490                     305,341
Littledown Nominees Ltd                  A/c 02642                     977,324
Littledown Nominees Ltd                  A/c 31348                      94,000
Littledown Nominees Ltd                  A/c 18667                     360,000
Littledown Nominees Ltd                  A/c 10469                     597,538
Littledown Nominees Ltd                  A/c 10496                   1,460,864
Littledown Nominees Ltd                  A/c 10492                     885,020
Littledown Nominees Ltd                  A/c 10491                   3,320,418
Littledown Nominees Ltd                  A/c 10488                   3,457,963
Littledown Nominees Ltd                  A/c 10495                   3,290,000
Littledown Nominees Ltd                  A/c 10489                     765,448
Littledown Nominees Ltd                  A/c 05577                      82,655
Mellon Nominees (UK) Ltd                 A/c AVOF0003002             1,059,015
Mellon Nominees (UK) Ltd                 A/c WWSF0004002               518,493
Roy Nominees                             A/c 104450                    133,623
State Street Nominees Limited            A/c JY17                    1,353,002
State Street Nominees Limited            A/c JTAV                      121,352
William & Glyns (Isle of Man) Nominees   A/c 301780                    125,000
Ltd

                                 TOTAL                              24,420,653






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