X0306 4 2017-02-21 0001000753 INSPERITY, INC. NSP 0001198988 SHARP DOUGLAS S 19001 CRESCENT SPRINGS DRIVE KINGWOOD TX 77339 1 SVP Finance, CFO & Treasurer Common Stock 2017-02-21 4 S 0 1326 84.93 D 21296 D Common Stock 2017-02-21 4 F 0 1307 84.30 D 19989 D Common Stock 2017-02-21 4 F 0 730 84.30 D 19259 D Common Stock 2017-02-22 4 S 0 1937 83.23 D 17322 D Payment of tax liability by withholding securities incident to the vesting of a restricted stock award. /s/ Christian P. Callens, by Power of Attorney 2017-02-23