Holding(s) in Company

AMEC plc

5 August 2011

In accordance with the Disclosure and Transparency Rules (DTR) 5, we have received a notification from BlackRock, Inc stating that, as at 2 August 2011, they held a notifiable interest of 37,437,097 shares in AMEC plc, which represents 11.27% of the voting rights in the Company. This holding comprises an indirect holding of 35,958,924 (10.83%) and a CFD holding of 1,478,173 (0.45%).

The reasons for the notification are stated as: "An acquisition or disposal of voting rights" and "An acquisition or disposal of instruments with similar economic effect to qualifying financial instruments".

The notification states that the threshold that has been crossed or reached is that the holding has gone above 11%.

The notification also states that the chain of controlled undertakings through which the voting rights are effectively held is BlackRock Investment Management (UK) Limited.

Kim Hand

Assistant Company Secretary