Answer: Property deviance
Explanation:
Concept of work place deviance is defined as the mechanism in which intentional action are performed by employee of the organization to cause harm or damage organization.
Property deviance is the part of workplace deviance in which an employee tries to achieve physical benefits or harm the organization with legal permission.
According to the question,Nathan is displaying property deviance behavior because he is sharing the company' information and design to competing companies without authorization to damage his organization.