Company: NSP
Filing Date: 2025-04-15
Form Type: DEF 14A
Source: 0001000753-25-000013
Chunk: 0

Company: INSPERITY, INC.
Filing Date: 2025-04-15
Form: DEF 14A
Chunk 0
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### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### Washington, D.C. 20549

#### SCHEDULE 14A INFORMATION

#### Proxy Statement Pursuant to Section 14(a) of the

#### Securities Exchange Act of 1934
<div align='center'>(Amendment No. )</div>

Filed by the Registrant x Filed by a Party other than the Registrant o

Check the appropriate box:

| o                                                                        |     | Preliminary Proxy Statement                                                                         |
| o                                                                        |     | Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))                     |
| x                                                                        |     | Definitive Proxy Statement                                                                          |
| o                                                                        |     | Definitive Additional Materials                                                                     |
| o                                                                        |     | Soliciting Material under Rule 14a-12                                                               |
| INSPERITY, INC.                                                          |     |                                                                                                     |
| (Name of registrant as specified in its charter)                         |     |                                                                                                     |
| (Name of person(s) filing proxy statement, if other than the registrant) |     |                                                                                                     |
| Payment of Filing Fee (Check all boxes that apply):                      |     |                                                                                                     |
| x                                                                        |     | No fee required.                                                                                    |
| o                                                                        |     | Fee paid previously with preliminary materials.                                                     |
| o                                                                        |     | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a6(i)(1) and 0-11. |

#### Paul J. Sarvadi

#### Chairman of the Board

#### and Chief Executive Officer
April 14, 2025

Dear Fellow Stockholders:

On behalf of your Board of Directors and management, I am pleased to invite you to attend the Annual Meeting of Stockholders of Insperity, Inc. to be held in the Auditorium of Centre I of our corporate headquarters located at 19001 Crescent Springs Drive, Kingwood, Texas 77339, on May 20, 2025, at 1:30 p.m. Houston, Texas time.

Please carefully consider the information in the enclosed proxy statement regarding the proposals to be presented at the meeting. Our annual report on Form 10-K for the year ended December 31, 2024 is also enclosed.

It is important that your shares are represented at the meeting. Whether or not you plan to attend the meeting, please submit your proxy via the Internet or telephone or