REG — Costain Group PLC — Holding(s) in Company
For best results when printing this announcement, please click on link below: RNS Number: 1751W Costain Group PLC 24 September 2026 TR-1: Standard form for notification of major holdings 1. Issuer Details ISIN GB00B64NSP76 Issuer Name COSTAIN GROUP PLC UK or Non-UK Issuer UK 2. Reason for Notification An acquisition or disposal of financial instruments 3. Details of person subject to the notification obligation Name Oasis Management Company Ltd. City of registered office (if applicable) Central Country of registered office (if applicable) Hong Kong 4. Details of the shareholder Full name of shareholder(s) if different from the person(s) subject to the notification obligation, above City of registered office (if applicable) Country of registered office (if applicable) 5. Date on which the threshold was crossed or reached 22-Sep-2026 6. Date on which Issuer notified 24-Sep-2026 7. Total positions of person(s) subject to the notification obligation % of voting rights attached to shares (total of 8.A) % of voting rights through financial instruments (total of 8.B 1 + 8.B 2) Total of both in % (8.A + 8.B) Total number of voting rights held in issuer Resulting situation on the date on wh
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For best results when printing this announcement, please click on link below: RNS Number: 1751W Costain Group PLC 24 September 2026 TR-1: Standard form for notification of major holdings 1. Issuer Details ISIN GB00B64NSP76 Issuer Name COSTAIN GROUP PLC UK or Non-UK Issuer UK 2. Reason for Notification An acquisition or disposal of financial instruments 3. Details of person subject to the notification obligation Name Oasis Management Company Ltd.
City of registered office (if applicable) Central Country of registered office (if applicable) Hong Kong 4. Details of the shareholder Full name of shareholder(s) if different from the person(s) subject to the notification obligation, above City of registered office (if applicable) Country of registered office (if applicable) 5. Date on which the threshold was crossed or reached 22-Sep-2026 6. Date on which Issuer notified 24-Sep-2026 7.
041348 8. Notified details of the resulting situation on the date on which the threshold was crossed or reached 8A. A 8B1. B1 8B2.
735679% 9. Information in relation to the person subject to the notification obligation 2. 735679% Oasis Management Company Ltd. 735679% Oasis Management Holdings Ltd.
735679% 10. In case of proxy voting Name of the proxy holder The number and % of voting rights held The date until which the voting rights will be held If date does not apply, explain below 11. Additional Information 12. Date of Completion 24-Sep-2026 13.
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