X0306 4 2021-05-17 0 0001160951 DUCK CREEK TECHNOLOGIES, INC. DCT 0001821103 Van Biert Eugene Jr. C/O DUCK CREEK TECHNOLOGIES, INC. 22 BOSTON WHARF ROAD BOSTON MA 02210 0 1 0 0 Chief Revenue Officer Common Stock, par value $0.01 per share 2021-05-17 4 S 0 12950 36.30 D 227342 D Common Stock, par value $0.01 per share 2021-05-17 4 S 0 700 36.73 D 226642 D The transaction was effected pursuant to a Rule 10b5-1 plan adopted on 1/11/2021. The reported price is a weighted average price (rounded to the nearest cent). These shares were sold in multiple transactions at prices ranging from $35.70 to $36.69, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. The reported price is a weighted average price (rounded to the nearest cent). These shares were sold in multiple transactions at prices ranging from $36.70 to $36.75, inclusive. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote. /s/ Christopher R. Stone as Attorney-in-Fact 2021-05-18