X0306 4 2017-02-14 0 0001107843 QUALYS, INC. QLYS 0001007707 COURTOT PHILIPPE F C/O QUALYS, INC. 1600 BRIDGE PARKWAY REDWOOD CITY CA 94065 1 1 1 0 Chairman, President & CEO Common Stock 2017-02-14 4 S 0 20000 34.9701 D 5506234 D Common Stock 2017-02-15 4 S 0 20000 34.8027 D 5486234 D Common Stock 100000 I See Footnote The sale transaction reported on this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 18, 2016. The sale price represents the weighted average price of the shares sold ranging from $34.75 to $35.10 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 $34.65 to $34.90 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. /s/ Bruce Posey by power of attorney for Philippe F. Courtot 2017-02-16