X0306 4 2021-10-01 0 0001289945 Spok Holdings, Inc SPOK 0001582403 Butterfield Nathaniel Blair C/O SPOK HOLDINGS, INC. 5911 KINGSTOWNE VILLAGE PARKWAY, 6TH FLR ALEXANDRIA VA 22315 1 0 0 0 Common Stock 2021-10-01 4 A 0 1468 10.22 A 34913 I N. Blair Butterfield, Trustee of the Butterfield Joint Revocable Trust Deferred Stock Unit 2021-10-01 4 A 0 0 0.00 A Deferred Stock Unit 0 5637 I N. Blair Butterfield, Trustee of the Butterfield Joint Revocable Trust Each deferred stock unit represents the right to receive one share of common stock of the Issuer. The deferred stock units are fully vested and will be settled in shares of the Issuer's common stock upon the Reporting Person's separation from service with the Issuer or as otherwise provided by the Issuer's Deferred Compensation Plan for Non-Employee Directors. /N. Blair Butterfield/ 2021-10-01