RWE AG (RWE.XE) Tuesday said the greenshoe option the German utility has granted the bookrunners of last week's placement of shares in American Water Works Co (AWK) has been fully exercised, which will reduce its stake in the U.S.-based water utility to around 47%.

A spokesman for RWE said all 3.9 million shares on offer will be placed with the bookrunners - Merrill Lynch & Co., Citi and Goldman, Sachs & Co. - at $17.25 a share, the same price buyers paid in the secondary offer last Friday.

The proceeds of the greenshoe transaction amount to around $67 million, the spokesman said.

Company Web site: www.rwe.com

-By Jan Hromadko, Dow Jones Newswires; +49 69 29 725 503; jan.hromadko@dowjones.com