BP p.l.c. - Transaction in Own Shares

BP p.l.c. - 15 May 2008

BP p.l.c. announces that on 14 May 2008, it purchased for cancellation 1,245,000 ordinary shares at prices between 614.00 pence and 621.00 pence per share.

BP p.l.c. also announces that on 14 May 2008 it transferred to participants in its employee share schemes 9,935 ordinary shares at prices between 350.00 pence and 500.00 pence. These shares were previously held as treasury shares.

Following the above transactions BP p.l.c. holds 1,907,171,589 ordinary shares in Treasury, and has 18,844,356,238 ordinary shares in issue (excluding Treasury shares).

Enquiries: Fergus MacLeod, BP p.l.c. Tel: 020 7496 4632

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