1 March 2022

The Weir Group PLC 

Voting Rights and Share Capital

In accordance with the FCA Disclosure and Transparency Rules (the DTR), The Weir Group PLC (the Company) hereby notifies that as at 1 March 2022, the Company's capital consisted of 259,613,517 ordinary shares of 12.5 pence each (Shares) in issue. The number of Shares held in Treasury is 1,465.

Therefore, the total number of voting rights in the Company is 259,612,052.

The above figure 259,612,052 may be used by shareholders as the denominator for the calculations by which they will determine if they are required to notify their interest in, or a change to their interest in, the Company under the DTR.

For further information, please contact:

Graham Vanhegan

Company Secretary

Telephone: 0141 308 3771