X0508 4 2023-12-22 0 0001720671 HashiCorp, Inc. HCP 0001894601 Holmes Marc C/O HASHICORP, INC. 101 SECOND STREET, SUITE 700 SAN FRANCISCO CA 94105 0 1 0 0 Chief Marketing Officer 1 Class A Common Stock 2023-12-22 4 S 0 45316 23.4797 D 0 D The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on June 23, 2023. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.30 to $23.71, 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. /s/ Paul Warenski, by power of attorney 2023-12-27