NSP

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported): February 10, 2026

Insperity, Inc. (Exact name of registrant as specified in its charter)

Delaware1-1399876-0479645 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

19001 Crescent Springs Drive Kingwood, Texas 77339

(Address of principal executive offices and zip code)

Registrant’s telephone number, including area code: (281) 358-8986

Securities registered pursuant to Section 12(b) of the Act: Title of each classTicker symbol(s)Name of each exchange on which registered Common Stock, $.01 par value per shareNSPNew York Stock Exchange NYSE Texas

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2 below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under The Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under The Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). ☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition. On February 10, 2026, Insperity, Inc. issued a press release announcing the company’s financial and operating results for the quarter and year ended December 31, 2025. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated by reference. The information in Item 2.02 of this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, is being furnished to the SEC and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. This information shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 2.05. Costs Associated with Exit or Disposal Activities. On February 10, 2026, we announced an internal reorganization designed to improve the efficiency and align our workforce with our key areas of focus (the “Realignment Plan”). These actions are expected to result in the elimination of approximately 4% of our non-sales positions. We expect to continue disciplined hiring in sales and other key positions. We currently estimate that we will incur one-time charges of approximately $9 million in connection with the Realignment Plan, consisting primarily of cash expenditures for severance payments, employee benefits, and related costs. We expect that the majority of the charges will be incurred in the first quarter of 2026 and that the execution of the Realignment Plan will be substantially complete before the end of the first quarter of 2026. We intend to exclude the charges associated with the Realignment Plan from our non-GAAP financial measures. The charges that we expect to incur are subject to a number of assumptions, including requirements in applicable states jurisdictions, and actual expenses may differ from the estimates disclosed above. We may also incur charges and expenditures not currently contemplated due to unanticipated events that may occur in connection with the Realignment Plan.

Item 9.01. Financial Statements and Exhibits. (d)Exhibits

99.1— Press release regarding financial and operating results issued by Insperity, Inc. on February 10, 2026.

104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

INSPERITY, INC.

By:/s/ Christian P. Callens

Christian P. Callens Senior Vice President of Legal, General Counsel & Secretary

Date: February 10, 2026

nsp-202511030001000753FALSE00010007532025-11-032025-11-030001000753us-gaap:CommonStockMember2025-11-032025-11-03

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported): November 3, 2025

Insperity, Inc. (Exact name of registrant as specified in its charter)

Delaware1-1399876-0479645 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

19001 Crescent Springs Drive Kingwood, Texas 77339

(Address of principal executive offices and zip code)

Registrant’s telephone number, including area code: (281) 358-8986

Securities registered pursuant to Section 12(b) of the Act: Title of each classTicker symbol(s)Name of each exchange on which registered Common Stock, $.01 par value per shareNSPNew York Stock Exchange NYSE Texas

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2 below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under The Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under The Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). ☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.01. Entry into a Material Definitive Agreement. On November 3, 2025, a subsidiary of Insperity, Inc. (the "Company") entered into an amendment to its arrangement with UnitedHealthcare related to its medical coverage (the “Amendment”). The Amendment includes additional expected cost savings starting in 2026 and extends the arrangement through 2028; provides the Company with the option to annually elect to limit its responsibility for each participant’s claim costs to $500,000, $750,000, or $1,000,000 per year; revises certain administrative costs payable by the Company; and adds additional volume-based incentives, subject to certain conditions. The other previously disclosed material items remain unchanged. The foregoing summary is qualified in its entirety by reference to the agreement, a copy of which is filed as Exhibit 10.1 to this Form 8-K and is incorporated in this Item 1.01 by reference. A copy of the Company's press release announcing this amendment is attached as Exhibit 99.1.

Item 2.02. Results of Operations and Financial Condition. On November 3, 2025, Insperity, Inc. issued a press release announcing the company’s financial and operating results for the quarter ended September 30, 2025. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated by reference. The information in Item 2.02 of this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, is being furnished to the SEC and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. This information shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing.

Item 9.01. Financial Statements and Exhibits. (d)Exhibits

10.1(+)Letter Agreement by and between Insperity Holdings, Inc. and UnitedHealthcare Insurance Company entered into as of November 3, 2025.

99.1— Press release regarding financial and operating results issued by Insperity, Inc. on November 3, 2025.

104Cover Page Interactive Data File - the cover page XBRL tags are embedded within the Inline XBRL document.

(+)Certain portions of the exhibit have been omitted pursuant to Item 601(b)(10) of Regulation S-K. The omitted information is (i) not material and (ii) the type of information the Company treats as private or confidential.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

INSPERITY, INC.

By:/s/ Christian P. Callens

Christian P. Callens Senior Vice President of Legal, General Counsel & Secretary

Date: November 3, 2025

nsp-202508010001000753FALSE00010007532025-08-012025-08-010001000753us-gaap:CommonStockMember2025-08-012025-08-01

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

Date of Report (date of earliest event reported): August 1, 2025

Insperity, Inc. (Exact name of registrant as specified in its charter)

Delaware1-1399876-0479645 (State or other jurisdiction of incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

19001 Crescent Springs Drive Kingwood, Texas 77339

(Address of principal executive offices and zip code)

Registrant’s telephone number, including area code: (281) 358-8986

Securities registered pursuant to Section 12(b) of the Act: Title of each classTicker symbol(s)Name of each exchange on which registered Common Stock, $.01 par value per shareNSPNew York Stock Exchange

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2 below):

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2(b) under The Exchange Act (17 CFR 240.14d-2(b))

☐ Pre-commencement communications pursuant to Rule 13e-4(c) under The Exchange Act (17 CFR 240.13e-4(c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter). ☐ Emerging growth company

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 2.02. Results of Operations and Financial Condition. On August 1, 2025, Insperity, Inc. issued a press release announcing the company’s financial and operating results for the quarter ended June 30, 2025. A copy of the press release is furnished as Exhibit 99.1 hereto and incorporated by reference. The information in Item 2.02 of this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, is being furnished to the SEC and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. This information shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing. Item 7.01. Regulation FD Disclosure. On July 31, 2025, Insperity, Inc. issued a press release announcing the company's updated HR solutions portfolio. A copy of the press release is furnished as Exhibit 99.2 hereto and incorporated by reference. The information in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.2 attached hereto, is being furnished to the SEC and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liabilities of that section. This information shall not be deemed to be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such a filing. Item 9.01. Financial Statements and Exhibits. (d)Exhibits

99.1— Press release regarding financial and operating results issued by Insperity, Inc. on August 1, 2025.

99.2— Press release regarding updated HR solutions portfolio issued by Insperity, Inc. on July 31, 2025.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

INSPERITY, INC.

By:/s/ Christian P. Callens

Christian P. Callens Senior Vice President of Legal, General Counsel & Secretary

Date: August 1, 2025