Holding(s) in Company

TR-1: NOTIFICATION OF MAJOR INTEREST IN SHARES
1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached:			Weir Group PLC
2 Reason for the notification (please tick the appropriate box or boxes):
An acquisition or disposal of voting rights				YES
An acquisition or disposal of qualifying financial instruments which may result in the acquisition of shares already issued to which voting rights are attached
An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments
An event changing the breakdown of voting rights
Other (please specify):
3. Full name of person(s) subject to the notification obligation:		Capital Research and Management Company
4. Full name of shareholder(s) (if different from 3.):
5. Date of the transaction and date on which the threshold is crossed or reached:		16 April 2012
6. Date on which issuer notified:		17 April 2012
7. Threshold(s) that is/are crossed or reached:		5%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares if possible using the ISIN CODE

Situation previous to the triggering transaction

Resulting situation after the triggering transaction

Number of Shares

Number of Voting Rights

Number of shares

Number of voting rights

% of  voting rights

Direct

Indirect

Direct

Indirect

Direct

Indirect

Ordinary Shares (ISIN: GB00094658)

10,467,870

10,467,870

N/A

10,639,000

N/A

10,639,000

N/A

5.0091%

B: Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/ Conversion Period

Number of voting rights that may be acquired if the instrument is exercised/ converted.

% of voting rights

C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date

Exercise/ Conversion period

Number of voting rights instrument refers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

Percentage of voting rights

10,639,000

5.0091%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:
Capital Research and Management Company 10,639,000 - 5.009%
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:	Capital Research and Management Company
14. Contact name:	Christopher Aquino
15. Contact telephone number:	[phone]

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information contained therein.

Source: The Weir Group PLC via Thomson Reuters ONE

HUG#1604634