X0306 4 2020-08-10 0 0001107843 QUALYS, INC. QLYS 0001254781 POSEY BRUCE K C/O QUALYS, INC. 919 E. HILLSDALE BLVD. FOSTER CITY CA 94404 0 1 0 0 VP, GC and Corp. Sec. Common Stock 2020-08-10 4 S 0 251 112.3476 D 72164 D Common Stock 2020-08-10 4 S 0 340 113.1128 D 71824 D Common Stock 2020-08-10 4 S 0 198 114.0681 D 71626 D Common Stock 2020-08-10 4 S 0 32 114.9881 D 71594 D Common Stock 2020-08-10 4 S 0 92 116.3739 D 71502 D Common Stock 2020-08-10 4 S 0 41 117.0685 D 71461 D Common Stock 2020-08-10 4 S 0 37 118.5668 D 71424 D Common Stock 2020-08-10 4 S 0 9 120.00 D 71415 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 August 29, 2019. The sale price represents the weighted average price of the shares sold ranging from $111.67 to $112.66 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 $112.67 to $113.66 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 $113.67 to $114.66 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 $114.68 to $115.65 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 $115.79 to $116.77 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 $116.80 to $117.50 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 $118.38 to $118.98 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. /s/ Bruce Posey 2020-08-11