Holding(s) in Company

RNS Number : 4754N

Weir Group PLC

17 February 2009

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:

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):

16 February 2009

6. Date on which issuer notified:

17 February 2009

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	Indirect	Direct	Indirect
GB0009465807	10,802,934	531,734	10,271,200	0.253%	4.887%

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
10,802,934	5.140%

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

Chase Nominees Ltd	A/c 41407	621,432
Ameriprise Financial Inc.	A/c	431,018
Littledown Nominees Ltd	A/c 02891	1,620,396
Littledown Nominees Ltd	A/c 07198	423,734
Littledown Nominees Ltd	A/c 27642	108,000
Littledown Nominees Ltd	A/c 10479	6,000
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	33,000
Littledown Nominees Ltd	A/c 07199	40,050
Roy Nominees	A/c 104450	72,958
Mellon Nominees (UK) Ltd	A/c WWSF0004002	215,000
Littledown Nominees Ltd	A/c 18667	150,000
Littledown Nominees Ltd	A/c 10469	233,000
Littledown Nominees Ltd	A/c 10492	490,000
Littledown Nominees Ltd	A/c 10491	1,714,451
Littledown Nominees Ltd	A/c 10488	2,194,032
Littledown Nominees Ltd	A/c 30337	50,000
Littledown Nominees Ltd	A/c 31348	164,000
Littledown Nominees Ltd	A/c 02642	1,095,921