X0407 4 2023-05-30 false 0001626450 BigCommerce Holdings, Inc. BIGC 0001513984 Bellm Brent 11305 FOUR POINTS DRIVE BUILDING II, THIRD FLOOR AUSTIN TX 78726 true true false false President Chief Exec Officer false Series 1 Common Stock 2023-05-30 4 S false 31907.00 7.4735 D 730783.00 D Series 1 Common Stock 659907.00 I By Brent Bellm Spousal Trust through its partnership interest in Elkmont Ltd. Series 1 Common Stock 659907.00 I By Hilary Bellm 2021 Family Trust through its partnership interest in Elkmont Ltd. Series 1 Common Stock 100389.00 I By Mt. Eden Ltd. Series 1 Common Stock 496696.00 I By Wild Basin, Ltd. Reflects shares sold to cover tax withholding obligations in connection with the vesting and settlement of restricted stock units. /s /Jeff Mengoli, Attorney-in-Fact for Brent Bellm 2023-05-31