When Koffler retired in 1986, he sold the chain to Imasco Limited. That same year, David Bloom, a former Shoppers Drug Mart pharmacist, was appointed Chief Executive Officer of the Company. Bloom would lead the organization until retiring in 2001, having devoted a total of 35 years of service to the Company. During David Bloom's tenure, Shoppers doubled its number of stores, quadrupled its sales and increased profit ten-fold. David Bloom also launched the Shoppers Optimum loyalty program in 2000 which quickly became the largest and most successful loyalty program in Canada. The Optimum program currently boasts over 10 million members in Canada.