Form DEFA14A - Additional definitive proxy soliciting materials and Rule 14(a)(12) material

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

Filed by the Registrant  þ                             Filed by a Party other than the Registrant  ¨

Check the appropriate box:

¨

Preliminary Proxy Statement

¨

Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))

¨

Definitive Proxy Statement

þ

Definitive Additional Materials

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Soliciting Material Pursuant to §240.14a-12

SPOK HOLDINGS, INC.

(Name of Registrant as Specified in its Charter)

Payment of Filing Fee (Check all boxes that apply):

þ

No fee required.

¨

Fee paid previously with preliminary materials.

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Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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