COSTAIN GROUP PLC

Net Asset Value • Jan 2, 2026

National Storage Mechanism | Additional information

RNS Number : 4877N

Costain Group PLC

02 January 2026

Costain Group PLC

BLOCK LISTING SIX MONTHLY RETURN

(Note: Italicised terms have the same meaning as given in the Listing Rules.)

02 January 2026

Name of applicant:		Costain Group PLC ("the Company")
Name of scheme(s):		The Company's Employee Sharesave Plan.
Period of return:	From:	1 July 2025	To:	31 December 2025
Balance of unallotted securities under scheme(s) from previous return:		58,293
Plus:  The amount by which the block scheme(s) has been increased since the date of the last return (if any increase has been applied for):		Nil
Less:  Number of securities issued/allotted under scheme(s) during period (see UKLR20.6.6R):		Nil
Equals:  Balance under scheme(s) not yet issued/allotted at end of period:		58,293

There was no change in the reporting period.

Name of contact:	Cyd Trumper, Senior Assistant Company Secretary
Telephone number of contact:	07876 133084

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