Activision Inc. said backdated stock options issued over the past 13 years would cost the video game developer $67 million before taxes in non-cash expenses.

The Santa Monica-based company said a review of the company’s options grants from 1994 to 2006 is nearly complete and financial statements should be filed by the end of the month. The company has not filed a quarterly report since August 2006.

Activision said two months ago that an internal investigation found no intentional wrong doing by Chief Executive Bobby Kotick, who issued the options which were backdated to yield bigger gains. The company also said it will ask 10 current or former officers to give back profits from the misdated options.

Shares in Activision were down 10 cents to $20.75 in afternoon trading Thursday on the Nasdaq.