Websters defines it as: ' the conveying to an employee of the inalienable right to share in a pension fund especially in the event of termination of employment prior to the normal retirement age; also : the right so conveyed ' This was the keynote on an insider trading form. The person selling the shares sold 29,587 and has 45,413 remaining shares after this sale. Explanation of Responses: 1. Shares withheld to satisfy tax withholding related to restricted stock vesting. I'm trying to decipher this transaction and understand what is meant by 'restricted stock vesting' I'm assuming it means this person could only sell a certain amount of shares because he is an employee of UAL Corp and is restricted to selling certain amounts of ownership. Sort of how our employer IRA's are handled. I'll try and attach the form in question.