Nearly three quarters (72 percent) of staff admit to stealing data from their employer, says Imperva.
Research by the security firm revealed customer data was most likely to be taken by staff, with 26 percent admitting to pilfering the information. This was closely followed by HR records and marketing data, with 25 percent each, while one in ten took redundancy lists.
Nearly a quarter (23 percent) used USB memory sticks to remove the data, while 23 percent used laptops and 13 percent used a mobile phone.
Furthermore, almost half of employees know of a colleague that has stolen data from a firm while more than two thirds (69 percent) believe a competitor has received data this way.
Seven in ten said they would steal data if they knew they were going to be fired and 37 percent said that would take information if facing redundancy.
"That employees steal data is nothing new, but it is surprising to see the number of people who think they are entitled to do so," said Amichai Shulman, chief technology officer at Imperva.
More than four in five (85 percent) of staff said they had sensitive company data stored on their home computer or mobile phone. However, six in ten firms don't have a policy that covers the removal of company data form personal devices if a member of staff leaves.
"Creating policies that you adhere to means everyone knows where they stand and what is expected of them," he said.