X0206 3 2023-06-02 0 0001626450 BigCommerce Holdings, Inc. BIGC 0001979522 Cassidy Charles D 11305 FOUR POINTS DRIVE BUILDING II, SUITE 100 AUSTIN TX 78726 false true false false General Counsel Series 1 Common Stock 36865.00 D Incentive Stock Option (Right to Buy) 3.87 2029-11-14 Series 1 Common Stock 4680.00 D Incentive Stock Option (Right to Buy) 2.70 2028-09-20 Series 1 Common Stock 3500.00 D The option agreement provides that the option vests 25% at the one year anniversary of the vesting start date, then vests ratably monthly thereafter for a total vesting period of four years. The vesting start date was September 16, 2019. These options fully vested on September 1, 2022. Charles D. Cassidy 2023-06-06