ATCO Share Ownership

It is important for prospective owners of ATCO shares to understand that ATCO is a diversified group of companies principally controlled by Sentgraf, a Southern Family holding company.

It is also important for present and prospective owners to understand that the ATCO share registry has both non-voting and voting common shares.

ATCO Class I Non-Voting Shares

TSX Symbol:
» ACO.X

Issued and Outstanding as at December 31, 2007:
» 50,866,696

Dividends:
» Class I shares are entitled to dividends as declared by the Board of Directors.

ATCO Class II Voting Shares

TSX Symbol:
» ACO.Y

Issued and Outstanding as at December 31, 2007:
» 6,934,568

Dividends:
» Class II shares are entitled to dividends as declared by the Board of Directors.