X0306 4 2021-02-22 0001000753 INSPERITY, INC. NSP 0001055604 ARIZPE ARTHUR A 19001 CRESCENT SPRINGS DRIVE KINGWOOD TX 77339 1 President and COO Common Stock 2021-02-22 4 F 0 910 79.17 D 44133 D Common Stock 109808 I By S.C.A Legacy, Ltd. Payment of tax liability by withholding securities incident to the vesting of a restricted stock award. These shares are owned directly by Arizpe Investment Limited Partnership, which is controlled by Arizpe Management. Mr. Arizpe, by virtue of his position as Manager of Arizpe Management, may be deemed to beneficially own these shares. /s/ Christian P. Callens, by Power of Attorney 2021-02-24