GAME's two most senior management members, Lisa Morgan and David Thomas, have sold over 5 million of stock between them.
The news has influenced the retailer's share price to fall by 14 per cent today, down to 192.75p.
A GAME spokesperson told MCV: "Lisa and David could not trade shares last year due to regulations that they had to adhere to during the Gamestation takeover.
"This is simply a bit of personal housekeeping. Both parties still maintain a significant holding in the business."
The retailer added that the 5.4 million shares sale is said to be related to options and incentive plan shares.
Hemscott reports that the pair sold their shares at an average price of 224.63 pence each.
Game Group said Morgan sold 1.38 million shares – worth about 3.1 million. These comprised of shares acquired after the exercise of options and those granted under a long-term incentive plan.
Morgan now holds 202,000 shares, deferred shares to the value of 174,000 and 1.67 million options.
The retailer confirmed that Thomas sold 1.04 million shares, which also comprised shares acquired after the exercise of options and those granted under a long-term incentive plan.
Thomas now holds 66,000 shares, deferred shares to the value of 154,986 and 808, 126 options.