Temporary change in the number of shares in Atlas Copco AB

Temporary change in the number of shares in Atlas Copco AB

Stockholm, Sweden, May 31, 2011: The number of shares outstanding in
Atlas Copco AB was during May increased from 1 229 613 104 to
2 459 226 208. The change is a result of the 2:1 share split and the
share redemption procedure resolved by the Annual General Meeting on
April 20.

Following the split, there are 1 678 788 192 series A shares in the
company and 780 438 016 series B shares. Half of the shares in each
series are redemption shares.

Trading in the redemption shares began on NASDAQ OMX Stockholm on May 16
and will continue up to and including June 8, after which they will be
automatically redeemed for SEK 5 per share. The number of shares in
Atlas Copco AB will then revert to the original number, 1 229 613 104.

For further information please contact:
Daniel Frykholm, Media Relations Manager
46 (0)8 743 8060 or 46 (0)70 865 8060