Costain Regulatory News (COST)

Name of applicant:

Costain Group PLC ("the Company")

Name of scheme:

The Company's employee savings related share option scheme

Period of return:

From:

01 July 2015

To:

31 December 2015

Balance of unallotted securities under scheme(s) from previous return:

10,736

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 LR3.5.7G):

Nil

Equals:  Balance under scheme(s) not yet issued/allotted at end of period:

10,736

Name of contact:

Tracey Wood, Company Secretary

Telephone number of contact:

01628 842444

Enquiries:

Costain Group PLC

Tel: 01628 842444

Tracey Wood

Secretary

Instinctif Partners

Tel: 020 7457 2020

Mark Garraway

Helen Tarbet