Transaction in Own Shares

BP PLC
21 September 2006

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

BP p.l.c.  -  21 September 2006



BP p.l.c. announces that on 20 September 2006, it purchased for cancellation
9,087,000 ordinary shares at prices between 580.5 pence and 586.0 pence per
share and between 1091.33 cents and 1104.17 cents per share.

BP p.l.c. also announces that on 20 September 2006 it transferred to
participants in its employee share schemes 255,554 ordinary shares at prices
between 350.00 pence and 511.0 pence. These shares were previously held as
treasury shares.

Following the above transactions, BP p.l.c. holds 1,948,078,081 ordinary shares
in Treasury, and has 19,854,250,162 ordinary shares in issue (excluding Treasury
shares).



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


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