X0508 4 2026-03-02 0001000753 INSPERITY, INC. NSP 0001740766 ALLISON JAMES D 19001 CRESCENT SPRINGS DRIVE KINGWOOD TX 77339 1 EVP, Finance, CFO & Treasurer 0 Common Stock 2026-03-02 4 A 0 20535 0 A 85515 D Common Stock 2026-03-02 4 F 0 1663 22.21 D 83852 D Common Stock 2026-03-02 4 A 0 417 0 A 84269 D Common Stock 2026-03-03 4 A 0 154 0 A 84423 D Common Stock 2026-03-03 4 F 0 151 21.13 D 84272 D Award of restricted stock units pursuant to the Insperity, Inc. Incentive Plan, as amended and restated effective May 22, 2023, and as subsequently amended. Units vest in annual increments of one-third beginning on the first anniversary of the award. Each restricted stock unit represents a right to receive one share of Insperity, Inc. common stock ("Common Stock") upon vesting. Payment of tax liability by withholding securities incident to the vesting of a restricted stock unit awards. The number of shares represents the dividend rights that were settled in shares of 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. The number of shares represents the cash value of dividend rights that were settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately preceding the settlement date. Payment of tax liability by withholding securities incident to the settlement of the three-year performance period awards that were granted under the Long-Term Incentive Plan, following the recent final certification of the achievement of the performance conditions by the Compensation Committee. /s/ Christian P. Callens, by Power of Attorney 2026-03-04