This paper extends prior stock option literature by examining the impact of individual and corporate tax incentives on the decision to hold or sell shares acquired through the exercises of incentive stock options (ISOs) and non-qualified stock options (NQSOs). We focus on factors found in prior literature to be associated with the choice to hold or sell in the context of the type of stock option exercised. Specifically, we find that the positive (negative) relation found in prior literature between the decision to hold shares following exercise and future returns (depth) is associated more with NQSOs than ISOs, consistent with individual tax incentives. Examining corporate tax incentives, we find that corporate tax benefits mitigate insiders' likelihood to hold shares obtained from ISO exercise. Furthermore, we find evidence that firms compensate employees to forgo individual tax benefits associated with holding shares from ISO exercise, and as this compensation increases, insiders are more likely to sell following exercise.

JEL Classifications: H24; H25; J33.

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