Last updated
Feb 3, 2026
Exercising options 101
What it means to exercise
Exercising stock options means the holder chooses to buy shares at the option’s exercise (strike) price, according to the terms of the stock option plan and option agreement.
When options can be exercised
Only vested options are eligible. Unvested options are not yet earned and cannot be exercised.
How to exercise options in Mantle
If you are an employee, advisor, or other option holder, this is the kind of flow you’ll see in Mantle:
Log in to your Mantle account
Use your email and magic link to log in, as with any other Mantle access.
View your option grants
From your Holdings dashboard, select the option grant you want to exercise. You will see:
Total options granted
Vesting schedule
Exercise price
Grant date
Start an exercise request
Click Actions → Exercise.
Mantle will show you:
How many options are currently exercisable (vested and not yet exercised).
Estimated cost (number of options x exercise price)
Choose how many options to exercise
Enter the number of vested options you want to exercise (up to the exercisable minimum).
Mantle will recalculate the total exercise cost.
Confirm address
Confirm your personal details and click Next.
Download, sign, and attach the exercise notice form
Download and sign the exercise notice form.
Attach the signed notice form to Mantle.
Review and submit
Review the exercise summary and click Submit.
You'll see a pending status while the company admin reviews and processes it.
Payment
Once approved, you will find the final details of the total payment due and payment instructions.
Complete the payment based on the payment instructions provided to you.
Once paid, go back into Mantle and click I have paid.