X0306 4 2021-09-16 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 2021-09-16 4 S false 21697.00 56.4039 D 37543.00 I By Robert and Jackie Alvarez Revocable Trust Series 1 Common Stock 2021-09-16 4 S false 8303.00 57.1561 D 29240.00 I By Robert and Jackie Alvarez Revocable Trust Series 1 Common Stock 116310.00 D Series 1 Common Stock 185185.00 I By Robert Alvarez Gifting Trust This sale was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 30, 2020. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $55.89 to $56.8899, inclusive. The reporting person undertakes to provide to BigCommerce Holdings, Inc., any security holder of BigCommerce Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in Footnote 1 to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $56.91 to $57.9099, inclusive. The reporting person undertakes to provide to BigCommerce Holdings, Inc., any security holder of BigCommerce Holdings, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price with the ranges set forth in Footnote 2 to this Form 4. /s /Jeff Mengoli, Attorney-in-Fact for Robert Alvarez 2021-09-20