NSP

SEC source: 0001127602-18-016226 · form4.xml · nonDerivative · entry 1

MINCKS JAY E · CIK 0001198985 · EVP of Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 65,204

F1 · price: Weighted average price. Actual prices ranged from $81.70 to $81.73. Full information regarding the number of shares sold at each separate price will be provided upon request to the SEC's staff, Insperity, Inc. or its stockholders.

F2 · balance_after: Includes 242 shares purchased through the Insperity Employee Stock Purchase Plan.

SEC source: 0001127602-18-011409 · form4.xml · nonDerivative · entry 1

YOUNG AUSTIN P · CIK 0001021469 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 26,634

F1 · price: Weighted average price. Actual prices ranged from $70.01 to $70.10. Full information regarding the number of shares sold at each separate price will be provided upon request to the SEC's staff, Insperity, Inc. or its stockholders.

F2 · balance_after: This amount includes additional shares of common stock issued in connection with the Company's previously announced 2-for-1 stock split, which was completed on December 18, 2017.

SEC source: 0001127602-18-011412 · form4.xml · nonDerivative · entry 1

Herink Daniel D · CIK 0001398237 · SVP Legal, Gen Counsel & Sec

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 36,380

F1 · price: Weighted average price. Actual prices ranged from $70.00 to $70.25. Full information regarding the number of shares sold at each separate price will be provided upon request to the SEC's staff, Insperity, Inc. or its stockholders.

SEC source: 0001127602-18-011411 · form4.xml · nonDerivative · entry 1

SHARP DOUGLAS S · CIK 0001198988 · SVP Finance, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 31,955

SEC source: 0001127602-18-011408 · form4.xml · nonDerivative · entry 1

SARVADI PAUL J · CIK 0001032399 · Director · Chairman of the Board & CEO

10b5-1 filing: Not disclosed

Ownership: Indirect · By Self, As General Partner of Our Ship Limited Partnership, Ltd.

Disclosed balance after: 1,433,412

F1 · price: Represents a gift of shares to a charitable organization.

SEC source: 0001127602-18-010174 · form4.xml · nonDerivative · entry 2

SARVADI PAUL J · CIK 0001032399 · Director · Chairman of the Board & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 582,052

F3 · kind: Payment of tax liability by withholding securities incident to the settlement of the three-year performance period awards that were granted in 2015 under the LTIP, following final certification of the achievement of the performance conditions by the Compensation Committee.

SEC source: 0001127602-18-010174 · form4.xml · nonDerivative · entry 1

SARVADI PAUL J · CIK 0001032399 · Director · Chairman of the Board & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 627,058

F1 · date: This is the settlement date for shares of Insperity, Inc. ("Common Stock") that are being issued in connection with dividend rights earned following final certification of the three-year performance period awards granted in 2015 in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan.

F2 · shares: 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.

SEC source: 0001127602-18-010167 · form4.xml · nonDerivative · entry 2

MINCKS JAY E · CIK 0001198985 · EVP of Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 69,962

F3 · kind: Payment of tax liability by withholding securities incident to the settlement of the three-year performance period awards that were granted in 2015 under the LTIP, following final certification of the achievement of the performance conditions by the Compensation Committee.

SEC source: 0001127602-18-010167 · form4.xml · nonDerivative · entry 1

MINCKS JAY E · CIK 0001198985 · EVP of Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 86,011

F1 · date: This is the settlement date for shares of Insperity, Inc. ("Common Stock") that are being issued in connection with dividend rights earned following final certification of the three-year performance period awards granted in 2015 in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan.

F2 · shares: 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.

SEC source: 0001127602-18-010163 · form4.xml · nonDerivative · entry 2

Herink Daniel D · CIK 0001398237 · SVP Legal, Gen Counsel & Sec

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,380

F3 · kind: Payment of tax liability by withholding securities incident to the settlement of the three-year performance period awards that were granted in 2015 under the LTIP, following final certification of the achievement of the performance conditions by the Compensation Committee.

SEC source: 0001127602-18-010163 · form4.xml · nonDerivative · entry 1

Herink Daniel D · CIK 0001398237 · SVP Legal, Gen Counsel & Sec

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 48,026

F1 · date: This is the settlement date for shares of Insperity, Inc. ("Common Stock") that are being issued in connection with dividend rights earned following final certification of the three-year performance period awards granted in 2015 in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan.

F2 · shares: 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.

SEC source: 0001127602-18-010157 · form4.xml · nonDerivative · entry 2

ARIZPE ARTHUR A · CIK 0001055604 · EVP of Client Services and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 50,182

F3 · kind: Payment of tax liability by withholding securities incident to the settlement of the three-year performance period awards that were granted in 2015 under the LTIP, following final certification of the achievement of the performance conditions by the Compensation Committee.

SEC source: 0001127602-18-010157 · form4.xml · nonDerivative · entry 1

ARIZPE ARTHUR A · CIK 0001055604 · EVP of Client Services and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 66,271

F1 · date: This is the settlement date for shares of Insperity, Inc. ("Common Stock") that are being issued in connection with dividend rights earned following final certification of the three-year performance period awards granted in 2015 in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan.

F2 · shares: 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.

SEC source: 0001127602-18-010154 · form4.xml · nonDerivative · entry 2

SHARP DOUGLAS S · CIK 0001198988 · SVP Finance, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 34,955

F3 · kind: Payment of tax liability by withholding securities incident to the settlement of the three-year performance period awards that were granted in 2015 under the LTIP, following final certification of the achievement of the performance conditions by the Compensation Committee.

SEC source: 0001127602-18-010154 · form4.xml · nonDerivative · entry 1

SHARP DOUGLAS S · CIK 0001198988 · SVP Finance, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 41,764

F1 · date: This is the settlement date for shares of Insperity, Inc. ("Common Stock") that are being issued in connection with dividend rights earned following final certification of the three-year performance period awards granted in 2015 in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan.

F2 · shares: 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.

SEC source: 0001127602-18-010141 · form4.xml · nonDerivative · entry 2

RAWSON RICHARD G · CIK 0001055610 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 179,015

F3 · kind: Payment of tax liability by withholding securities incident to the settlement of the three-year performance period awards that were granted in 2015 under the LTIP, following final certification of the achievement of the performance conditions by the Compensation Committee.

SEC source: 0001127602-18-010141 · form4.xml · nonDerivative · entry 1

RAWSON RICHARD G · CIK 0001055610 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 195,092

F1 · date: This is the settlement date for shares of Insperity, Inc. ("Common Stock") that are being issued in connection with dividend rights earned following final certification of the three-year performance period awards granted in 2015 in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan.

F2 · shares: 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.

SEC source: 0001127602-18-008119 · form4.xml · derivative · entry 6

Herink Daniel D · CIK 0001398237 · SVP Legal, Gen Counsel & Sec

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,794

Underlying: Common Stock · 19,268 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008119 · form4.xml · derivative · entry 5

Herink Daniel D · CIK 0001398237 · SVP Legal, Gen Counsel & Sec

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,062

Underlying: Common Stock · 7,068 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F9 · date: These three-year performance period awards were granted in 2015. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date. No further performance periods remain for this grant.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008119 · form4.xml · derivative · entry 4

Herink Daniel D · CIK 0001398237 · SVP Legal, Gen Counsel & Sec

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,994

Underlying: Common Stock · 3,600 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F8 · date: These three-year performance period awards were granted in 2017. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008119 · form4.xml · derivative · entry 3

Herink Daniel D · CIK 0001398237 · SVP Legal, Gen Counsel & Sec

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,394

Underlying: Common Stock · 3,933 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F5 · date: These three-year performance period awards were granted in 2016. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008119 · form4.xml · nonDerivative · entry 2

Herink Daniel D · CIK 0001398237 · SVP Legal, Gen Counsel & Sec

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 47,320

F3 · kind: Restricted stock award pursuant to the Insperity, Inc. 2012 Incentive Plan.

SEC source: 0001127602-18-008119 · form4.xml · nonDerivative · entry 1

Herink Daniel D · CIK 0001398237 · SVP Legal, Gen Counsel & Sec

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 40,575

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

SEC source: 0001127602-18-008117 · form4.xml · derivative · entry 8

RAWSON RICHARD G · CIK 0001055610 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,582

Underlying: Common Stock · 41,262 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

F6 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F5 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008117 · form4.xml · derivative · entry 7

RAWSON RICHARD G · CIK 0001055610 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,844

Underlying: Common Stock · 15,136 shares

Expires not disclosed

F3 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F8 · date: These three-year performance period awards were granted in 2015. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date. No further performance periods remain for this grant.

F5 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F6 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F5 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008117 · form4.xml · derivative · entry 6

RAWSON RICHARD G · CIK 0001055610 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,708

Underlying: Common Stock · 6,400 shares

Expires not disclosed

F3 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F7 · date: These three-year performance period awards were granted in 2017. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F5 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F6 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F5 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008117 · form4.xml · derivative · entry 5

RAWSON RICHARD G · CIK 0001055610 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,308

Underlying: Common Stock · 7,100 shares

Expires not disclosed

F3 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F4 · date: These three-year performance period awards were granted in 2016. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F5 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F6 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F5 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008117 · form4.xml · nonDerivative · entry 1

RAWSON RICHARD G · CIK 0001055610 · Director · President

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 193,581

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

SEC source: 0001127602-18-008115 · form4.xml · derivative · entry 9

SARVADI PAUL J · CIK 0001032399 · Director · Chairman of the Board & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,057

Underlying: Common Stock · 110,333 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008115 · form4.xml · derivative · entry 8

SARVADI PAUL J · CIK 0001032399 · Director · Chairman of the Board & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 164,390

Underlying: Common Stock · 40,468 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F9 · date: These three-year performance period awards were granted in 2015. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date. No further performance periods remain for this grant.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008115 · form4.xml · derivative · entry 7

SARVADI PAUL J · CIK 0001032399 · Director · Chairman of the Board & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 123,922

Underlying: Common Stock · 19,848 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F8 · date: These three-year performance period awards were granted in 2017. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008115 · form4.xml · derivative · entry 6

SARVADI PAUL J · CIK 0001032399 · Director · Chairman of the Board & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 104,074

Underlying: Common Stock · 21,720 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F5 · date: These three-year performance period awards were granted in 2016. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008115 · form4.xml · nonDerivative · entry 2

SARVADI PAUL J · CIK 0001032399 · Director · Chairman of the Board & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 623,019

F3 · kind: Restricted stock award pursuant to the Insperity, Inc. 2012 Incentive Plan.

SEC source: 0001127602-18-008115 · form4.xml · nonDerivative · entry 1

SARVADI PAUL J · CIK 0001032399 · Director · Chairman of the Board & CEO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 601,564

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

SEC source: 0001127602-18-008113 · form4.xml · derivative · entry 6

MINCKS JAY E · CIK 0001198985 · EVP of Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,582

Underlying: Common Stock · 41,262 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008113 · form4.xml · derivative · entry 5

MINCKS JAY E · CIK 0001198985 · EVP of Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,844

Underlying: Common Stock · 15,136 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F9 · date: These three-year performance period awards were granted in 2015. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date. No further performance periods remain for this grant.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008113 · form4.xml · derivative · entry 4

MINCKS JAY E · CIK 0001198985 · EVP of Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,708

Underlying: Common Stock · 6,400 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F8 · date: These three-year performance period awards were granted in 2017. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008113 · form4.xml · derivative · entry 3

MINCKS JAY E · CIK 0001198985 · EVP of Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,308

Underlying: Common Stock · 7,100 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F5 · date: These three-year performance period awards were granted in 2016. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008113 · form4.xml · nonDerivative · entry 2

MINCKS JAY E · CIK 0001198985 · EVP of Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 84,500

F3 · kind: Restricted stock award pursuant to the Insperity, Inc. 2012 Incentive Plan.

SEC source: 0001127602-18-008113 · form4.xml · nonDerivative · entry 1

MINCKS JAY E · CIK 0001198985 · EVP of Sales & Marketing

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 73,770

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

SEC source: 0001127602-18-008109 · form4.xml · derivative · entry 7

ARIZPE ARTHUR A · CIK 0001055604 · EVP of Client Services and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 17,582

Underlying: Common Stock · 41,262 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

F8 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F8 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008109 · form4.xml · derivative · entry 6

ARIZPE ARTHUR A · CIK 0001055604 · EVP of Client Services and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 58,844

Underlying: Common Stock · 15,136 shares

Expires not disclosed

F5 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F10 · date: These three-year performance period awards were granted in 2015. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date. No further performance periods remain for this grant.

F7 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F8 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F8 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008109 · form4.xml · derivative · entry 5

ARIZPE ARTHUR A · CIK 0001055604 · EVP of Client Services and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 43,708

Underlying: Common Stock · 6,400 shares

Expires not disclosed

F5 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F9 · date: These three-year performance period awards were granted in 2017. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F7 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F8 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F8 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008109 · form4.xml · derivative · entry 4

ARIZPE ARTHUR A · CIK 0001055604 · EVP of Client Services and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 37,308

Underlying: Common Stock · 7,100 shares

Expires not disclosed

F5 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F6 · date: These three-year performance period awards were granted in 2016. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F7 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F8 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F8 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008109 · form4.xml · nonDerivative · entry 2

ARIZPE ARTHUR A · CIK 0001055604 · EVP of Client Services and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 64,760

F3 · kind: Restricted stock award pursuant to the Insperity, Inc. 2012 Incentive Plan.

SEC source: 0001127602-18-008109 · form4.xml · nonDerivative · entry 1

ARIZPE ARTHUR A · CIK 0001055604 · EVP of Client Services and COO

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 54,030

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

SEC source: 0001127602-18-008107 · form4.xml · derivative · entry 6

SHARP DOUGLAS S · CIK 0001198988 · SVP Finance, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 9,794

Underlying: Common Stock · 19,268 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F1 · date: These shares of Insperity, Inc. common stock ("Common Stock") will be settled following the certification by the Compensation Committee on this date of the achievement of the final performance conditions for these three-year performance period awards granted in 2015.

F2 · shares: The number of shares does not include additional shares related to the cash value of dividend rights in the amount of $2.39 per share to be settled in shares of Common Stock based on the fair market value of the Common Stock on the trading day immediately proceeding the final settlement date in accordance with the Insperity, Inc. Long-Term Incentive Program (the "LTIP") under the Insperity, Inc. 2012 Incentive Plan, which will be reported in a separate filing.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008107 · form4.xml · derivative · entry 5

SHARP DOUGLAS S · CIK 0001198988 · SVP Finance, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,062

Underlying: Common Stock · 7,068 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F9 · date: These three-year performance period awards were granted in 2015. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date. No further performance periods remain for this grant.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008107 · form4.xml · derivative · entry 4

SHARP DOUGLAS S · CIK 0001198988 · SVP Finance, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 21,994

Underlying: Common Stock · 3,600 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F8 · date: These three-year performance period awards were granted in 2017. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

SEC source: 0001127602-18-008107 · form4.xml · derivative · entry 3

SHARP DOUGLAS S · CIK 0001198988 · SVP Finance, CFO & Treasurer

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 18,394

Underlying: Common Stock · 3,933 shares

Expires not disclosed

F4 · derivative.exercise_price: Each phantom stock performance unit represents a contingent right to receive one share of Common Stock pursuant to the terms of the LTIP based on a three-year performance period award cycle.

F5 · date: These three-year performance period awards were granted in 2016. The Compensation Committee certified the achievement of the performance conditions related to 2017 performance on this date.

F6 · shares: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.

F7 · derivative.exercise_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F7 · derivative.expiration_date: The phantom stock performance units vest at the end of the three-year award cycle period following certification in accordance with the LTIP of the achievement of all performance goals for the performance periods applicable to such award.

F6 · balance_after: The number of shares (a) includes additional shares issued in connection with the Company's 2-for-1 stock split, which was completed on December 18, 2017, and (b) does not include the value of dividend rights that will be settled in shares of Common Stock. The value of these dividend rights will be based on the fair market value of the Common Stock on the trading day immediately preceding the final settlement date following the certification of the final performance conditions after the end of the three-year award cycle in accordance with the LTIP.