QUALYS INC

Securities Trading Plans of Directors and Executive Officers

During the three months ended March 31, 2024, the following directors and officer, as defined in Rule 16a-1(f), adopted a “Rule 10b5-1 trading arrangement” as defined in Regulation S-K Item 408, as follows:

On February 23, 2024, Wendy M. Pfeiffer, a member of ourboard of directors, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 2,000 shares of our common stock. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until May 23, 2025, or earlier if all transactions under the trading arrangement are completed. Prior to entering into the new Rule 10b5-1 trading arrangement in February 2024, Ms. Pfeiffer’s previous Rule 10b5-1 trading arrangement expired according to its terms because all the transactions under the arrangement were completed.

On February 28, 2024, Sumedh S. Thakar, our Chief Executive Officer and a member of our board of directors, adopted a Rule 10b5-1 trading arrangement providing for the sale from time to time of an aggregate of up to 114,000 shares of our common stock, which represents the gross number of shares authorized to be sold during the duration of the plan, before excluding any shares withheld by the company to satisfy its income tax withholding in connection with the net settlement of the equity awards. The trading arrangement is intended to satisfy the affirmative defense in Rule 10b5-1(c). The duration of the trading arrangement is until May 28, 2025, or earlier if all transactions under the trading arrangement are completed.

No other director or officer, as defined in Rule 16a-1(f), adopted orterminated a “Rule 10b5-1 trading arrangement” or a “non-Rule 10b5-1 trading arrangement,” as defined in Regulation S-K Item 408, during the three months ended March 31, 2024.