Jeanine Montgomery Form 4 MICROSTRATEGY / Jeanine Montgomery ownership change

Exhibit A:

Ms. Montgomery also directly owns an employee stock option to purchase 2,500
shares of Class A common stock with (i) an exercise price of $131.53 per share
and (ii) an expiration date of February 8, 2028. Of the 2,500 shares subject to
this option, 1,250 shares vested on February 8, 2021 and 1,250 shares are
scheduled to vest on February 8, 2022.

Ms. Montgomery also directly owns an employee stock option to purchase 5,000
shares of Class A common stock with (i) an exercise price of $151.60 per share
and (ii) an expiration date of November 22, 2029. Of the 5,000 shares subject to
this option, 1,250 shares vested on November 22, 2020, 1,250 shares are
scheduled to vest on November 22, 2021, 1,250 shares are scheduled to vest on
November 22, 2022, and 1,250 shares are scheduled to vest on November 22, 2023.

Ms. Montgomery also directly owns an employee stock option to purchase 7,500
shares of Class A common stock with (i) an exercise price of $691.23 per share
and (ii) an expiration date of February 23, 2031. Of the 7,500 shares subject to
this option, 1,875 shares are scheduled to vest on February 23, 2022, 1,875
shares are scheduled to vest on February 23, 2023, 1,875 shares are scheduled to
vest on February 23, 2024, and 1,875 shares are scheduled to vest on February
23, 2025.