KEY POINTS
  • About three-quarters of companies offer an employee stock purchase plans to their workers.
  • But chances are, you are not participating in your company's plan if they offer one, research shows.
  • Investing in these plans let you share in your company's upside. However,  be careful you don't become too heavily invested.

When Aaron Shapiro dug through the workplace benefits his mother was entitled to as a 30-year employee at United Healthcare, he noticed a big missed opportunity.

The health insurer's employee stock purchase plan gave her the ability to buy shares at a 15% discount with a feature called a lookback. That means a participant in the plan gets the lowest price from either the beginning or the end of the stock purchase period.