Mr Lew yesterday revealed that after the sharemarket closed on Tuesday, First Retail Investments, a company wholly owned by the Lew family, bought 18 million Coles Myer shares at $6.35 each, taking the total holding associated with Mr Lew to 7.39 per cent. The latest buying spree coincided with the launch today of an extensive postal campaign by Mr Lew who must win the support of hundreds of thousands of Coles Myer's retail investors if he is to retain his board seat at the annual meeting on November 20.