John Kenny, chief financial officer of Iron Mountain Corp. in Boston, makes it sound simple. The board of directors knew the company would have to start expensing stock options sooner or later—so in the summer of 2002, it decided on sooner.

John Kenny, chief financial officer of Iron Mountain Corp. in Boston, makes it sound simple. The board of directors knew the company would have to start expensing stock options sooner or later—so in the summer of 2002, it decided on sooner.