144 0001558242 XXXXXXXX LIVE 0001107843 QUALYS, INC. 001-35662 919 E. Hillsdale Boulevard, 4th Floor Foster City CA 94404 6508016100 SUMEDH SHRINAND THAKAR Director Officer COMMON Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

34000 4630120.00 36326126 05/29/2025 NASDAQ Common 05/29/2025 Exercise of Stock Options Issuer N 26000 05/29/2025 Cash Common 02/01/2024 Restricted Stock Units & Performance Stock Units Issuer N 8000 02/01/2024 N/A N 10b5-1 Sales Plan for SUMEDH THAKAR

919 E. Hillsdale Boulevard, 4th Floor Foster City CA 94404

Common 04/14/2025 7000 866663.70 10b5-1 Sales Plan for SUMEDH THAKAR

919 E. Hillsdale Boulevard, 4th Floor Foster City CA 94404

Common 03/14/2025 7000 876272.60 The securities to be sold were and will be received upon the exercise of stock options over the next three months. The dates of acquisition and payment were and will be the dates of exercise/sale. The securities to be sold were acquired upon the vesting of restricted stock & performance stock units during the period of 02/01/2024 through 1/30/2025 05/29/2025 02/26/2025 /s/ Sumedh Shrinand Thakar