SEC Form 4 · Updated Daily
NSP
— INSPERITY, INC. OwnershipInsider and institutional ownership derived from SEC Form 4 filings. Click any owner to see their holdings across every company they’ve filed on, and how their position has changed over time.
Current Reporting Owners
| Owner | Role | Shares Owned | As Of | Last Activity |
|---|---|---|---|---|
| Starboard Principal Co LP | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| Starboard Principal Co GP LLC | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| Smith Jeffrey C | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| Starboard Value LP | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| STARBOARD VALUE & OPPORTUNITY MASTER FUND LTD | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| STARBOARD VALUE & OPPORTUNITY S LLC | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| Starboard Value & Opportunity C LP | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| Starboard Value R LP | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| Starboard Value GP LLC | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| Starboard Value R GP LLC | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| MITCHELL MARK R | 10%+ Owner | 1,986,958 | 2015-01-13 | — |
| SARVADI PAUL J | Director · Officer | 797,912 | 2026-09-11 | G |
| MINCKS JAY E | Officer | 108,653 | 2021-03-10 | S |
| ARIZPE ARTHUR A | Officer | 97,258 | 2026-03-02 | A |
| ALLISON JAMES D | Officer | 94,272 | 2026-03-10 | P |
| KAUFMAN CAROL R | Director | 53,268 | 2026-05-18 | A |
| SPURGIN JOHN H II | Officer | 34,200 | 2007-03-01 | A |
| Mehl Randall | Director | 31,908 | 2026-05-18 | A |
| BROWN MICHAEL W | Director | 30,054 | 2016-09-08 | M |
| Callens Christian P | Officer | 29,600 | 2026-03-11 | P |
| CLIFFORD TIM | Director | 29,113 | 2026-05-18 | A |
| SHARP DOUGLAS S | Officer | 28,516 | 2024-05-08 | S |
| MASTERSON ELLEN H | Director | 27,181 | 2026-05-18 | A |
| Duffy Sean Patrick | Officer | 22,125 | 2026-10-05 | A |
| YOUNG AUSTIN P | Director | 21,616 | 2019-06-11 | S |
| Herink Daniel D | Officer | 21,609 | 2023-11-17 | S |
| Ramchand Latha | Director | 21,321 | 2026-05-18 | A |
| Lumelleau John L | Director | 20,321 | 2026-05-18 | A |
| JONES ELI | Director | 19,048 | 2026-05-18 | A |
| MORPHY JOHN M | Director | 16,512 | 2026-05-18 | A |
| RAWSON RICHARD G | Director | 12,622 | 2026-05-18 | A |
| WILMINGTON PHILIP W | Director | 10,712 | 2026-05-18 | A |
| PETSCH GREGORY E | Director | 9,841 | 2013-05-14 | A |
| LATTANZIO PAUL S | Director | 5,259 | 2015-05-04 | S |
| SORENSEN NORMAN R | Director | 5,234 | 2017-06-16 | A |
| Feld Peter A | Director | 4,647 | 2017-06-30 | A |
| Traub Kenneth | Director | 4,000 | 2015-01-15 | — |
| Michelle McKenna | Director | 1,145 | 2017-08-23 | S |
| FIELDS JACK M JR | Director | 0 | 2015-05-11 | S |
Recent Filings
| Date | Owner | Activity | Shares | Price | Owned After |
|---|---|---|---|---|---|
| 2026-10-05 | Duffy Sean Patrick | Grant / award | 187 | $0.00 | 22,125 |
| 2026-10-05 | Duffy Sean Patrick | Tax withholding | 734 | $46.48 | 21,938 |
| 2026-09-11 | SARVADI PAUL J | Gift | 7,500 | $0.00 | 797,912 |
| 2026-08-17 | SARVADI PAUL J | Gift | 30,000 | $0.00 | 805,412 |
| 2026-06-03 | SARVADI PAUL J | Open-market buy | 233,000 | $34.05 | 1,105,912 |
| 2026-05-18 | RAWSON RICHARD G | Grant / award | 6,201 | $0.00 | 12,622 |
| 2026-05-18 | CLIFFORD TIM | Grant / award | 6,201 | $0.00 | 29,113 |
| 2026-05-18 | JONES ELI | Grant / award | 6,201 | $0.00 | 19,048 |
| 2026-05-18 | KAUFMAN CAROL R | Grant / award | 6,201 | $0.00 | 53,268 |
| 2026-05-18 | Lumelleau John L | Grant / award | 6,201 | $0.00 | 20,321 |
| 2026-05-18 | Mehl Randall | Grant / award | 6,201 | $0.00 | 31,908 |
| 2026-05-18 | MASTERSON ELLEN H | Grant / award | 6,201 | $0.00 | 27,181 |
| 2026-05-18 | MORPHY JOHN M | Grant / award | 6,201 | $0.00 | 16,512 |
| 2026-05-18 | Ramchand Latha | Grant / award | 6,201 | $0.00 | 21,321 |
| 2026-05-18 | WILMINGTON PHILIP W | Grant / award | 6,201 | $0.00 | 10,712 |
| 2026-05-05 | SARVADI PAUL J | Open-market buy | 400 | $30.00 | 699,670 |
| 2026-05-05 | SARVADI PAUL J | Open-market buy | 49,543 | $29.26 | 699,270 |
| 2026-05-05 | SARVADI PAUL J | Open-market buy | 50,057 | $28.20 | 649,727 |
| 2026-03-19 | SARVADI PAUL J | Open-market buy | 2,009 | $23.93 | 997,912 |
| 2026-03-19 | SARVADI PAUL J | Open-market buy | 22,991 | $23.57 | 995,903 |
| 2026-03-18 | SARVADI PAUL J | Open-market buy | 160,000 | $23.22 | 972,912 |
| 2026-03-17 | SARVADI PAUL J | Open-market buy | 2,000 | $22.98 | 474,670 |
| 2026-03-17 | SARVADI PAUL J | Open-market buy | 14,987 | $22.53 | 472,670 |
| 2026-03-11 | Callens Christian P | Open-market buy | 1,250 | $19.28 | 29,600 |
| 2026-03-11 | MASTERSON ELLEN H | Open-market buy | 1,200 | $19.90 | 20,980 |
| 2026-03-10 | ALLISON JAMES D | Open-market buy | 10,000 | $20.45 | 94,272 |
| 2026-03-03 | ALLISON JAMES D | Tax withholding | 151 | $21.13 | 84,272 |
| 2026-03-03 | ALLISON JAMES D | Grant / award | 154 | $0.00 | 84,423 |
| 2026-03-03 | ARIZPE ARTHUR A | Tax withholding | 282 | $21.13 | 95,836 |
| 2026-03-03 | ARIZPE ARTHUR A | Grant / award | 319 | $0.00 | 96,118 |
| 2026-03-03 | SARVADI PAUL J | Tax withholding | 2,057 | $21.13 | 457,683 |
| 2026-03-03 | SARVADI PAUL J | Grant / award | 1,384 | $0.00 | 459,740 |
| 2026-03-02 | ALLISON JAMES D | Grant / award | 417 | $0.00 | 84,269 |
| 2026-03-02 | ALLISON JAMES D | Tax withholding | 1,663 | $22.21 | 83,852 |
| 2026-03-02 | ALLISON JAMES D | Grant / award | 20,535 | $0.00 | 85,515 |
| 2026-03-02 | ARIZPE ARTHUR A | Grant / award | 570 | $0.00 | 95,799 |
| 2026-03-02 | ARIZPE ARTHUR A | Tax withholding | 2,029 | $22.21 | 95,229 |
| 2026-03-02 | ARIZPE ARTHUR A | Grant / award | 13,200 | $0.00 | 97,258 |
| 2026-03-02 | Callens Christian P | Grant / award | 248 | $0.00 | 28,350 |
| 2026-03-02 | Callens Christian P | Tax withholding | 1,052 | $22.21 | 28,102 |
Source: SEC EDGAR Form 4 filings. For informational purposes only — not investment advice.