X0306 4 2018-08-09 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 2018-08-09 4 M 0 20000 3.80 A 5458092 D Common Stock 2018-08-09 4 S 0 5964 88.4239 D 5452128 D Common Stock 2018-08-09 4 S 0 11269 89.3061 D 5440859 D Common Stock 2018-08-09 4 S 0 2767 89.9583 D 5438092 D Common Stock 2018-08-10 4 M 0 20000 3.80 A 5458092 D Common Stock 2018-08-10 4 S 0 7870 87.7984 D 5450222 D Common Stock 2018-08-10 4 S 0 12130 88.2427 D 5438092 D Common Stock 2018-08-13 4 M 0 20000 3.80 A 5458092 D Common Stock 2018-08-13 4 S 0 10292 85.7088 D 5447800 D Common Stock 2018-08-13 4 S 0 4212 86.6608 D 5443588 D Common Stock 2018-08-13 4 S 0 3682 87.9199 D 5439906 D Common Stock 2018-08-13 4 S 0 1814 88.3455 D 5438092 D Common Stock 100000 I See Footnote Stock Option (right to buy) 3.80 2018-08-09 4 M 0 20000 0.00 D 2019-12-02 Common Stock 20000 111927 D Stock Option (right to buy) 3.80 2018-08-10 4 M 0 20000 0.00 D 2019-12-02 Common Stock 20000 91927 D Stock Option (right to buy) 3.80 2018-08-13 4 M 0 20000 0.00 D 2019-12-02 Common Stock 20000 71927 D The sale transaction reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 24, 2018. The sale price represents the weighted average price of the shares sold ranging from $87.85 to $88.80 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. The sale price represents the weighted average price of the shares sold ranging from $88.85 to $89.825 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. The sale price represents the weighted average price of the shares sold ranging from $89.85 to $90.15 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. The sale price represents the weighted average price of the shares sold ranging from $87.00 to $87.975 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. The sale price represents the weighted average price of the shares sold ranging from $88.00 to $88.80 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. The sale price represents the weighted average price of the shares sold ranging from $85.25 to $86.225 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. The sale price represents the weighted average price of the shares sold ranging from $86.25 to $87.15 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. The sale price represents the weighted average price of the shares sold ranging from $87.30 to $88.25 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. The sale price represents the weighted average price of the shares sold ranging from $88.30 to $88.475 per share. Upon request by the Commission staff, the Issuer or a security holder of the Issuer, the Reporting Person will provide full information regarding the number of shares sold at each separate price within the range set forth in this Form 4. 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. The option is fully vested and immediately exercisable. /s/ Bruce Posey by power of attorney for Philippe F. Courtot 2018-08-13