X0508 4 2024-02-21 0001092699 SPS COMMERCE INC SPSC 0001489095 Black Archie C. 333 SOUTH SEVENTH STREET SUITE 1000 MINNEAPOLIS MN 55402 1 1 Common Stock 2024-02-21 4 S 0 3900 180.8342 D 76675 D Common Stock 2024-02-21 4 S 0 4500 182.1333 D 72175 D Common Stock 2024-02-21 4 S 0 323 182.3515 D 71852 D Common Stock 2024-02-22 4 S 0 244 181.4726 D 71608 D Common Stock 2024-02-22 4 S 0 4076 182.7351 D 67532 D Common Stock 2024-02-22 4 S 0 7865 183.3747 D 59667 D Common Stock 2024-02-22 4 S 0 1560 184.6939 D 58107 D Common Stock 2024-02-22 4 S 0 925 185.5393 D 57182 D Common Stock 2024-02-22 4 S 0 185 186.184 D 56997 D Common Stock 411.853 I By 401(k) Plan Common Stock 400 I By Son I Common Stock 400 I By Son II Common Stock 400 I By Son III Common Stock 400 I By Son IV Common Stock 666.70 I By IRA Adoption date of referenced 10b5-1(c) plan is: 08/29/2023. Reflects the weighted average price of 3,900 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 21, 2024 with sales prices ranging from $180.25 to $181.15 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. Reflects the weighted average price of 4,500 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 21, 2024 with sales prices ranging from $181.31 to $182.30 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. Reflects the weighted average price of 323 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 21, 2024 with sales prices ranging from $182.33 to $182.38 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. Reflects the weighted average price of 244 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 22, 2024 with sales prices ranging from $180.79 to $181.70 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. Reflects the weighted average price of 4,076 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 22, 2024 with sales prices ranging from $181.94 to $182.93 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. Reflects the weighted average price of 7,865 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 22, 2024 with sales prices ranging from $182.97 to $183.95 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. Reflects the weighted average price of 1,560 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 22, 2024 with sales prices ranging from $184.06 to $184.93 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. Reflects the weighted average price of 925 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 22, 2024 with sales prices ranging from $185.09 to $185.95 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. Reflects the weighted average price of 185 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 22, 2024 with sales prices ranging from $186.12 to $186.23 per share. The reporting person undertakes to provide upon request by the U.S. Securities and Exchange Commission staff, the issuer, or a security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price. /s/ Jonathan R. Zimmerman, Attorney-in-Fact for Archie C. Black 2024-02-23