Target and Neiman Marcus could be the tip of the iceberg, if a new Reuters report is correct. The organization writes that at least three other US retailers also suffered data breaches using similar techniques to the one that penetrated Target last month. Targets business was notably affected by its breach, with the company announcing that sales might have fallen as much as 2.5 percent compared to the prior year due to the breach, so its not surprising that other companies might not have come forward to announce that their data had been compromised unless compelled by law.