Option Exercise: How to Participate

1. When you are ready to exercise your options, complete and endorse the exercise notice that is part of your company's stock option agreement, which informs your William Blair & Company advisor of the number of shares you wish to exercise.
    
2. Complete an executed (signed) stock power, available from your investment representative at William Blair & Company,  making the stock negotiable when received by William Blair & Company.
    
3. Copies of the proper documentation will be sent by William Blair & Company to your company, thereby starting the exercise process.
    
4. If shares need to be sold, your investment professional will execute the sales transaction and deposit the proceeds less the costs of the stock, brokerage commissions, taxes, and fees into your William Blair & Company securities account.
    
5. A check will also be issued by William Blair & Company to your company for the amount of the shares plus any taxes withheld.