X0306 4 2020-01-13 0 0001107843 QUALYS, INC. QLYS 0001007707 COURTOT PHILIPPE F C/O QUALYS, INC. 919 E. HILLSDALE BLVD. FOSTER CITY CA 94404 1 1 1 0 Chairman, President & CEO Common Stock 2020-01-13 5 G 0 E 25000 0.00 D 5520494 D Common Stock 2020-02-01 4 F 0 4782 85.74 D 5515712 D Common Stock 100000 I See Footnote This transaction involved a transfer of securities from the Reporting Person to a family member who does not share the household of the Reporting Person. The Reporting Person disclaims beneficial ownership of the shares held in trust by this family member, and this report should not be deemed an admission that the Reporting Person is the beneficial owner of these shares for the purposes of Section 16 or for any other purpose. The reported shares were withheld to cover the Reporting Person's tax liability in connection with the vesting of restricted stock units. These shares are held directly by a custodian under the Uniform Gifts to Minors Act for the benefit of the Reporting Person's minor child. /s/ Bruce Posey by power of attorney for Philippe F. Courtot 2020-02-04