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): April 14, 2026

SPOK HOLDINGS, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code: (800) 611-8488

Not Applicable

Former name or former address, if changed since last report

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:

¨    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))

Securities registered pursuant to Section 12(b) of the Act:

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. ¨

On April 14, 2026, in connection with a strategic realignment designed to reduce costs, the Board of Directors of Spok Holdings, Inc. (the “Company”) appointed Michael W. Wallace, the Company’s Chief Operating Officer, to also serve as Chief Financial Officer, effective immediately. Mr. Wallace replaces Calvin C. Rice who will no longer serve as the Company’s Chief Financial Officer, effective immediately.

Mr. Wallace, age 57, was appointed President of Spok, Inc., a wholly owned operating subsidiary of the Company, in August 2022 and Chief Operating Officer of the Company in January 2020. Mr. Wallace joined the Company in 2017 and served as the Company’s Chief Financial Officer from 2017 to 2022. He has spent more than 30 years as a financial executive at both public and private companies. Prior to joining the Company, he was Executive Vice President and Chief Financial Officer of Intermedix Corporation, a global leader in healthcare revenue cycle/practice management and data analytics solutions, and Executive Vice President and CFO of The Elephant Group (d.b.a. Saveology.com), a leading Internet-based, direct-to-consumer marketing platform. Prior to that, he served as Senior Vice President and CFO of Radiology Corporation of America, a national provider of mobile and fixed-site positron emission tomography (PET) imaging services. Mr. Wallace has also served as an Assistant Chief Accountant in the SEC’s Division of Enforcement and was a member of the Commission’s Financial Fraud Task Force in Washington, D.C. Prior to being at the SEC, Mr. Wallace served as CFO at Inktel Direct, Corp., a direct marketing service firm, CELLIT Technologies, Inc., a software company serving the contact center marketplace, and Kellstrom Industries, Inc., a publicly held global aerospace company. Before joining Kellstrom, Mr. Wallace worked at KPMG Peat Marwick, LLP in Miami for more than seven years. He received his bachelor’s degree in business administration from the University of Notre Dame and is a licensed Certified Public Accountant.

On April 14, 2026, the Company issued a press release regarding the strategic realignment, including the appointment of Mr. Wallace as Chief Financial Officer. A copy of the press release is attached hereto as Exhibit 99.1 and incorporated herein by reference.

The information in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1, shall not be deemed to be “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”), or otherwise subject to the liability of that Section, and shall not be incorporated by reference into any registration statement or other document filed under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

(d) Exhibits:

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.