Holding(s) in Company

RNS Number : 3677D

Weir Group PLC

12 September 2008

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: (Yes)

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): Initial notification due to change of threshold for non-material interest (No)

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):

11 September 2008

6. Date on which issuer notified:

12 September 2008

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

Above the threshold of 5%

8. Notified details:

A: Voting rights attached to shares

Situation previous to the triggering transaction

Class/type of shares if possible using the ISIN CODE	Number of shares	Number of voting Rights
GB0009465807	N/A	N/A

Resulting situation after the triggering transaction

Class/type of shares if possible using the ISIN CODE	Number of shares	Number of voting rights		% of voting rights
	Direct	Direct	Indirect	Direct	Indirect
GB0009465807	10,613,858	558,710	10,055,148	0.266%	4.784%

B: Financial Instruments

Resulting situation after the triggering transaction

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

Total (A+B)

Number of voting rights	% of voting rights
10,613,858	5.050%

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, Threadneedle 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

Littledown Nominees Ltd	A/c 35822	16,200
Littledown Nominees Ltd	A/c 39364	88,529
The Bank of New York (Nominees) Ltd	A/c 5240181	11,876
Ameriprise Financial Inc.	A/c	70,916
Williams & Glyn (Isle of Man) Nominees Ltd	A/c 301780	45,000
Littledown Nominees Ltd	A/c 03449	360,000
Littledown Nominees Ltd	A/c 02891	1,617,836
Littledown Nominees Ltd	A/c 07198	435,382
Littledown Nominees Ltd	A/c 27642	123,328
Littledown Nominees Ltd	A/c 10478	15,024
Littledown Nominees Ltd	A/c 11121	11,400
Littledown Nominees Ltd	A/c 10479	6,800
Littledown Nominees Ltd	A/c 07205	423,834
Littledown Nominees Ltd	A/c 21688	129,457
Littledown Nominees Ltd	A/c 07207	586,651
Littledown Nominees Ltd	A/c 07196	20,147
Littledown Nominees Ltd	A/c 07199	37,778
Roy Nominees	A/c 104450	45,517
Mellon Nominees (UK) Ltd	A/c WWSF0004002	131,729
Littledown Nominees Ltd	A/c 10491	1,714,451
Littledown Nominees Ltd	A/c 10488	2,790,555
Littledown Nominees Ltd	A/c 10495	800,000
Littledown Nominees Ltd	A/c 31348	78,000
Littledown Nominees Ltd	A/c 02642	1,053,448