Director/PDMR Shareholding
Costain Group PLC announced on April 13, 2026, that its Chief Executive Officer, Alex Vaughan, and Chief Financial Officer, Helen Willis, were granted options under the 2023 Share Deferral Plan on April 10, 2026. Mr. Vaughan received an award for 118,103 ordinary shares with a nil exercise price, and Ms. Willis received an award for 97,615 ordinary shares, also with a nil exercise price. These awards represent one-third of their earned 2025 Annual Incentive Plan and are exercisable from the second anniversary of the grant date, remaining so for ten years provided they remain employees.
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Costain announces the following grants of share awards to Alex Vaughan, Chief Executive Officer, and Helen Willis, Chief Financial Officer.
SHARE DEFERRAL PLAN AWARDS
On 10 April 2026, awards have been made under The Costain 2023 Share Deferral Plan (Share Deferral Plan) over ordinary shares of 1p each in the Company in the form of options with a nil exercise price (SDP Awards). An SDP Award was granted to Alex Vaughan over 118,103 shares and Helen Willis over 97,615 shares, each representing deferral into shares of one third of their 2025 Annual Incentive Plan earned. No consideration was paid for the grant of the Awards.
The SDP Awards will normally become exercisable on the second anniversary of the grant date subject to the rules of the Share Deferral Plan. To the extent that all or any part of the SDP Awards become exercisable, they will remain exercisable until the tenth anniversary of the date of grant provided the individual remains an employee or officer of the Company.
The Notification of Dealing Forms for both directors, set out below, are provided in accordance with the requirements of the UK Market Abuse Regulation.
| a) | Name | ALEXANDER JOHN VAUGHAN |
| 2. | Reason for the notification | |
| a) | Position /status | CHIEF EXECUTIVE OFFICER/PDMR |
| b) | Initial notification / amendment | INITIAL NOTIFICATION |
| 3. | Details of the Issuer | |
| a) | Name | COSTAIN GROUP PLC |
| b) | LEI code | 213800PKIJBZ2EDTKC88 |
| a) | Description of the financial instrument, type of instrument Identification code | ORDINARY SHARES OF ONE PENCE EACH ISIN: GB00B64NSP76 |
| b) | Nature of the transaction | GRANT OF AN OPTION UNDER THE CO STAIN 2023 SHARE DEFERRAL PLAN (2 026 SDP Grant) |
| c) | Price(s) and volume(s) | Price(s) Volume(s) Nil cost 118,103 |
| d) | Aggregated information - Aggregated volume - Price | N/A |
| e) | Date of the transaction | 10 APRIL 2026 |
| f) | Place of the transaction | OUTSIDE A TRADING VENUE |
| a) | Name | HELEN MARGARET WILLIS |
| 2. | Reason for the notification | |
| a) | Position /status | CHIEF FINANCIAL OFFICER/PDMR |
| b) | Initial notification / amendment | INITIAL NOTIFICATION |
| 3. | Details of the Issuer | |
| a) | Name | COSTAIN GROUP PLC |
| b) | LEI code | 213800PKIJBZ2EDTKC88 |
| a) | Description of the financial instrument, type of instrument Identification code | ORDINARY SHARES OF ONE PENCE EACH ISIN: GB00B64NSP76 |
| b) | Nature of the transaction | GRANT OF A N OPTION UNDER THE COSTAIN 2023 SHARE DEFERRAL PLAN (2 026 SDP Grant) |
| c) | Price(s) and volume(s) | Price(s) Volume(s) Nil cost 97,615 |
| d) | Aggregated information - Aggregated volume - Price | N/A |
| e) | Date of the transaction | 10 APRIL 2026 |
| f) | Place of the transaction | OUTSIDE A TRADING VENUE |
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