London-based Ensco will offer 57 million shares to the public and up to another 8.55 million shares to underwriters, it said on Thursday after markets closed.

On Friday, Ensco priced the offering at $9.25 a share. The share price fell accordingly on Friday, dropping about 8% to trade at $9.75 around midday.

Ensco said it plans to use the proceeds for "general corporate purposes".

Goldman