Holding(s) in Company

Weir Group PLC
16 March 2007



TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES


1. Identity of the issuer or the underlying issuer of existing shares to which
voting rights are attached:

The Weir Group PLC


2. Reason for the notification (please state Yes/No):


An acquisition or disposal of voting rights: (No)


An acquisition or disposal of financial instruments which may result in the
acquisition of shares already issued to which voting rights are attached: (No)


An event changing the breakdown of voting rights: (No)


Other (please specify): EU Transparency Directive (Yes)


3. Full name of person(s) subject to the notification obligation (iii):

Ameriprise Financial, Inc. and its group


4. Full name of shareholder(s) (if different from 3.):

See additional information under 13


5. Date of the transaction (and date on which the threshold is crossed or
reached if different):

N/A


6. Date on which issuer notified:

14 March 2007


7. Threshold(s) that is/are crossed or reached:

N/A


8. Notified details:


A: Voting rights attached to shares


Situation previous to the triggering transaction

Class/type of shares if possible using the   Number of      Number of voting
ISIN CODE                                    shares         Rights

GB0009465807                                 N/A            N/A



Resulting situation after the triggering transaction

Class/type of shares if    Number of  Number of voting rights    % of voting
possible using the ISIN    shares                                  rights
CODE

                           Direct     Direct     Indirect      Direct   Indirect

GB0009465807               513,635    513,635    19,162,680    0.243%   9.082%


B: Financial Instruments

Resulting situation after the triggering transaction

Type of     Expiration Exercise/     Number of voting rights that may   % of
financial   Date       Conversion    be acquired if the instrument is   voting
instrument             Period/ Date  exercised/ converted.              rights

N/A         N/A        N/A           N/A                                N/A



Total (A+B)
Number of voting rights        % of voting rights

19,676,315                     9.326%


9. Chain of controlled undertakings through which the voting rights and/or the
financial instruments are effectively held, if applicable:

Ameriprise Financial, Inc., which controls the voting rights of


Threadneedle Asset Management Holdings Ltd, which controls the voting rights of


Threadneedle Asset Management Ltd, Threadneeedle International Ltd and
THreadneedle Pensions Ltd.


Proxy Voting:


10. Name of the proxy holder:

N/A


11. Number of voting rights proxy holder will cease to hold:

N/A


12. Date on which proxy holder will cease to hold voting rights:

N/A


13. Additional information:

Registered Owner


Bank of Ireland Nominees    A/c 4270483        282,455

Bank of Ireland Nominees    A/c 4239914        150,772

BNY (OSC) Nominees Ltd      A/c 219064         160,484

Littledown Nominees Ltd     A/c 35822          21,000

Littledown Nominees Ltd     A/c 10488          3,399,780

Littledown Nominees Ltd     A/c 10495          3,100,000

Littledown Nominees Ltd     A/c 10489          765,448

Littledown Nominees Ltd     A/c 10490          305,341

Littledown Nominees Ltd     A/c 30337          43,000

Littledown Nominees Ltd     A/c 02642          964,210

Littledown Nominees Ltd     A/c 10491          3,218,630

Littledown Nominees Ltd     A/c 07207          400,969

Littledown Nominees Ltd     A/c 03449          1,410,402

Littledown Nominees Ltd     A/c 05577          82,655

Littledown Nominees Ltd     A/c 05576          1,259,834

Littledown Nominees Ltd     A/c 27642          289,560

Littledown Nominees Ltd     A/c 07197          224,075

Littledown Nominees Ltd     A/c 11121          14,000

Littledown Nominees Ltd     A/c 07203          84,928

Littledown Nominees Ltd     A/c 10479          9,000

Littledown Nominees Ltd     A/c 34789          173,858

Littledown Nominees Ltd     A/c 10492          700,000

Littledown Nominees Ltd     A/c 07196          48,200

Littledown Nominees Ltd     A/c 18667          270,000

Littledown Nominees Ltd     A/c 10469          432,493

Littledown Nominees Ltd     A/c 39364          97,172

Littledown Nominees Ltd     A/c 10496          860,864

Littledown Nominees Ltd     A/c 21667          56,000

Mellon Nominees (UK) Ltd    A/c AVOF0003002    448,395

Mellon Nominees (UK) Ltd    A/c WWSF0004002    228,128

Roy Nominees                A/c 104450         67,162

William & Glyns (Isle of 
  Man)Nominees Ltd          A/c 301780         107,500



14. Contact name:

Company Secretary, Threadneedle Group


15. Contact telephone number:

0207 464 5000




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