X0306 4 2021-06-22 false 0001626450 BigCommerce Holdings, Inc. BIGC 0001819281 Alvarez Robert 11305 FOUR POINTS DRIVE BUILDING II, THIRD FLOOR AUSTIN TX 78726 false true false false Chief Financial Officer Series 1 Common Stock 2021-06-22 4 M false 5309.00 0.39 A 121619.00 D Series 1 Common Stock 2021-06-22 4 S false 5309.00 65.027 D 116310.00 D Series 1 Common Stock 185185.00 I By Robert Alvarez Gifting Trust Series 1 Common Stock 59240.00 I By Robert and Jackie Alvarez Revocable Trust Incentive Stock Option (Right to Buy) 0.39 2021-06-22 4 M false 5309.00 0.00 D 2012-10-26 2022-06-22 Series 1 Common Stock 5309.00 126734.00 D The stock option exercise was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 30, 2020. This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 30, 2020. /s /Jeff Mengoli, Attorney-in-Fact for Robert Alvarez 2021-06-24