Dimensional Fund Advisors Ltd., whose parent is Dimensional Fund Advisors LP and which filed on behalf of its investment advisory affiliates, disclosed an opening position in Spire Healthcare Group PLC under Rule 8.3 (U.K. takeover disclosure rule). The filing showed interests in 12,074,789 1p ordinary shares, equal to 3.00% of the company, as of 10 August 2026. Dimensional said its entities are investment advisors and expressly disclaimed beneficial ownership of the shares listed in the filing. It also said it does not have discretion regarding voting decisions for 88,133 of the shares included in the total. The dealing section recorded a purchase of 3 shares at 132.3300 GBP each. No cash-settled derivatives, stock-settled derivatives, subscription rights, indemnity arrangements, or option- or derivative-related understandings were disclosed, and no Supplemental Form 8 on open positions was attached.