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Weir prices offering of Australian $400 million senior notes

(Glasgow - United Kingdom) - October 16, 2025 - The Weir Group PLC ("Weir" or the "Company") has successfully priced an offering by its wholly owned subsidiary, Weir Group (Australian Holdings) Pty Limited (ABN 57 090 873 117), comprising Australian $400 million in aggregate principal amount of senior notes due 2031 (the "Notes"). The Notes will be guaranteed by the Company and Weir Group Inc., a US incorporated, wholly owned subsidiary of the Company. The net proceeds of the Notes are intended to partly fund the previously announced acquisition of Mining Software Holdings Pty Ltd ("Micromine").

"We are delighted with the positive response to the Group's Australian dollar syndicated bond offering. The proceeds will partly replace the existing bridging loan established for purposes of the Micromine acquisition" said Chief Financial Officer, Brian Puffer.

The Notes are priced at a spread of SQ ASW+165bps and will have a coupon of 5.200% per annum. The closing of the Notes offering is scheduled to be completed on or about October 23, 2025 and is subject to customary conditions.

Important Notice

This announcement does not constitute an offer to acquire any securities and shall not be deemed to constitute an offer of or an invitation to purchase or subscribe any securities. This announcement does not constitute an offer to sell, exchange or transfer any securities and is not soliciting an offer to purchase, exchange or transfer any securities in any jurisdiction where such offer, sale, exchange or transfer is not permitted or is unlawful.

The Notes have not been and will not be registered under the United States Securities Act of 1933, as amended (the "Securities Act"), or with any securities regulatory authority of any state or other jurisdiction of the United States, and may not be offered, sold, resold, pledged, delivered or transferred, directly or indirectly, into or within the United States or to, or for the account or benefit of, any U.S. persons as defined in Regulation S under the Securities Act, except pursuant to an exemption from, or in a transaction not subject to, the registration requirements of the Securities Act and in compliance with any applicable securities laws of any state or other jurisdiction of the United States.