[6][7] His son George took over the retailer in 1937 and led the company until his death in 1973 when grandson Larry Rossy assumed leadership of it when it had 20 stores.

That year, Larry Rossy opened the first Dollarama at the shopping center "Les Promenades du St-Laurent" in Matane.

[6] In November 2004, 80 percent of the chain was sold for $850 million US, to a private equity fund, Bain Capital, of Boston, Massachusetts.

[13] The number of stores in October 2021 was 539 in Ontario, 379 in Québec, 134 in Alberta, 111 in British Columbia, 42 in New Brunswick, 41 in Manitoba, 40 in Nova Scotia, 40 in Saskatchewan, 25 in Newfoundland and Labrador, and 5 in Prince Edward Island.

[15] This price level increase allowed the chain to acquire products from a greater variety of sources, including closeout sales.

[19][20] Many Dollarama stores were opened in place of former locations of the now defunct BiWay,[citation needed] which closed after a series of dubious financial transactions involving a new owner of the parent operation.