X0609 4 2026-10-05 0001000753 INSPERITY, INC. NSP 0002041810 Duffy Sean Patrick false 19001 CRESCENT SPRINGS DRIVE KINGWOOD TX 77339 1 SVP, Finance & Accounting(PAO) 0 Common Stock 2026-10-05 4 F 0 734 46.48 D 21938 D Common Stock 2026-10-05 4 A 0 187 0 A 22125 D Payment of tax liability by withholding securities incident to the vesting of a restricted stock unit award. The number of shares represents the dividend rights that were settled in shares of common stock of Insperity Inc. ("Common Stock") based on the fair market value of the Common Stock on the dividend payable dates. Fractional amounts have been rounded to the nearest whole number. /s/ Christian P. Callens, by Power of Attorney 2026-10-06