Transaction in Own Shares

BP PLC
22 May 2006


BP p.l.c. - Transaction in Own Shares
BP p.l.c. - 22 May 2006

BP p.l.c. announces that on 19 May 2006, it purchased 6,750,000 ordinary shares
at prices between 623.5 pence and 630.0 pence per share. The purchased shares
will all be held as Treasury shares.

Following the above transactions, BP p.l.c. holds 1,549,568,535 ordinary shares
in Treasury, and has 20,144,567,776 ordinary shares in issue (excluding Treasury
shares).

Enquiries: Fergus MacLeod, BP p.l.c. Tel : [phone]



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