X0508 4 2026-02-20 0 0001092699 SPS COMMERCE INC SPSC 0001994652 Collins Chadwick 333 SOUTH SEVENTH STREET SUITE 1000 MINNEAPOLIS MN 55402 1 1 0 0 Chief Executive Officer 1 Common Stock 2026-02-20 4 S 0 7776 58.0937 D 77849 D Common Stock 2026-02-20 4 S 0 2806 59.1809 D 75043 D Common Stock 2026-02-20 4 S 0 2802 59.718 D 72241 D Common Stock 2026-02-20 4 A 0 101932 0 A 174173 D Common Stock 65.166 I By 401(k) Plan Sales effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on September 12, 2025. Reflects the weighted average price of 7,776 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 20, 2026, with sales prices ranging from $57.50 to $58.46 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 2,806 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 20, 2026, with sales prices ranging from $58.51 to $59.50 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 2,802 shares of Common Stock of the Issuer sold by the reporting person in multiple transactions on February 20, 2026, with sales prices ranging from $59.52 to $60.01 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. Restricted Stock Unit award that vests as to 25% of the units on each anniversary of the date of the grant. /s/ Jonathan R. Zimmerman, Attorney-in-Fact for Chadwick Collins 2026-02-24