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Spok Holdings, Inc

SPOK
Exchange
Nasdaq
Industry
Radiotelephone Communications
SEC CIK
0001289945

In the last 90 days, Spok Holdings, Inc insiders filed 0 open-market purchases and 1 sale; 132 institutions reported holding it in 13F filings for Q2 2026, worth $110.9M in total; no superinvestor holds it.

Holders of 5% or more of SPOK

Holders whose latest Schedule 13D or 13G filing reports 5% or more of Spok Holdings, Inc, largest stake first. The change is against the holder's previous filing.

Holders of 5% or more of SPOK
HolderLatest formStakeChangeFirst filedLatest filingFiling
Renaissance Technologies LLC13G5.13%1.06M shares–Feb 11, 20215 filingsAug 13, 2025SEC

Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.

13D and 13G filings

22 Schedule 13D and 13G filings on Spok Holdings, Inc, newest first, including old-format filings without a stake.

Schedule 13D and 13G filings on SPOK
Filed (ET)FilerFormStakeChangeEvent dateFiling
Mar 27, 20261:17 PM ETVanguard Group Inc13G/A0.00%0 shares−5.58 ppfrom 5.58%Below 5%Mar 13, 2026SEC
Aug 13, 20254:12 PM ETRenaissance Technologies LLCand 1 other13G5.13%1.06M shares–Apr 7, 2025SEC
Jul 29, 20252:32 PM ETVanguard Group Inc13G5.58%1.15M shares+0.59 ppfrom 4.99%Jun 30, 2025SEC
Apr 30, 202511:14 AM ETVanguard Group Inc13G/A4.99%1.02M shares–Below 5%Mar 31, 2025SEC
Nov 12, 2024Vanguard Group Inc13G/AOld format–––SEC
Nov 4, 2024Vanguard Group Inc13G/AOld format–––SEC
Feb 13, 2024Renaissance Technologies LLC13G/AOld format–––SEC
Feb 9, 2024Dimensional Fund Advisors LP13G/AOld format–––SEC
Jan 26, 20244:23 PM ETBlackRock Inc.13GOld format–––SEC
Feb 14, 2023Deprince Race & Zollo Inc13G/AOld format–––SEC
Feb 13, 2023Renaissance Technologies LLC13G/AOld format–––SEC
Feb 10, 2023Dimensional Fund Advisors LP13G/AOld format–––SEC
Jun 29, 20224:45 PM ETAcacia Research Corp13D/AOld format–––SEC
Feb 11, 2022Renaissance Technologies LLC13G/AOld format–––SEC
Feb 10, 2022Vanguard Group Inc13G/AOld format–––SEC
Feb 8, 2022Dimensional Fund Advisors LP13G/AOld format–––SEC
Sep 9, 20214:20 PM ETBlackRock Inc.13G/AOld format–––SEC
Aug 30, 20215:14 PM ETAcacia Research Corp13DOld format–New–SEC
Feb 12, 2021Dimensional Fund Advisors LP13G/AOld format–––SEC
Feb 11, 2021Renaissance Technologies LLC13G/AOld format–––SEC
Feb 10, 2021Vanguard Group Inc13G/AOld format–––SEC
Jan 26, 20212:22 PM ETBlackRock Inc.13G/AOld format–––SEC

Form 144: proposed insider sales

35 notices from officers, directors and other affiliates planning to sell Spok Holdings, Inc shares, newest first.

Form 144 notices for SPOK
Filed (ET)SellerShares to sellMarket valuePlanned saleBrokerFiling
Nov 3, 20267:00 PM ETBrett ShockleyDirector16.2K$195.6KNov 2, 2026ComputershareSEC
Aug 10, 20265:14 PM ETChristine M. CournoyerDirector8.32K$94.3KAug 10, 2026Goldman Sachs & Co. LLCSEC
Aug 10, 20262:51 PM ETWoods-Keisling SharonOfficer20.0K$225.6KAug 10, 2026Charles Schwab Co., Inc.SEC
May 5, 202610:33 AM ETWoods-Keisling SharonOfficer10.0K$108.7KMay 5, 2026Charles Schwab Corp.SEC
Aug 25, 20252:32 PM ETWallace Michael WOfficer11.0K$197.8KAug 25, 2025Charles Schwab CorpSEC
Aug 21, 20255:04 PM ETKelly Vincent DOfficer25.0K$442.2KAug 21, 2025MERRILLSEC
Aug 14, 20256:26 PM ETBraeside Capital II, L.P.Affiliate of Director189.3K$3.55MAug 14, 2025Interactive Brokers LLCSEC
Aug 14, 20255:27 PM ETBraeside Capital, L.P.Affiliate of Director158.0K$2.96MAug 14, 2025Interactive Brokers LLCSEC
Aug 5, 20252:04 PM ETRice CalvinOfficer14.7K$270.6KAug 5, 2025Charles Schwab Corp.SEC
Aug 4, 20254:42 PM ETKelly Vincent DOfficer30.0K$555.8KAug 4, 2025MERRILLSEC
Aug 4, 20254:25 PM ETBraeside Investments, LLCAffiliate of Director (1)147.9K$2.74MAug 4, 2025Goldman Sachs & Co. LLCSEC
Aug 4, 202512:21 PM ETRice CalvinOfficer7.46K$139.7KAug 4, 2025Charles Schwab Corp.SEC
Aug 4, 202512:09 PM ETWallace Michael WOfficer10.0K$183.6KAug 4, 2025Charles Schwab Corp.SEC
May 9, 20254:03 PM ETChristine M. CournoyerDirector5.00K$82.7KMay 9, 2025Goldman Sachs & Co. LLCSEC
May 7, 20253:12 PM ETWallace Michael WOfficer6.00K$99.3KMay 7, 2025Charles Schwab Corp.SEC
May 6, 20254:47 PM ETKelly Vincent DOfficer30.0K$492.1KMay 6, 2025MERRILLSEC
Mar 6, 20253:02 PM ETWoods-Keisling SharonOfficer16.3K$266.2KMar 6, 2025Charles Schwab Corp.SEC
Mar 4, 20255:28 PM ETChristine M. CournoyerDirector12.0K$198.1KMar 4, 2025Goldman Sachs & Co. LLCSEC
Mar 4, 202512:53 PM ETWallace Michael WOfficer10.0K$165.9KMar 4, 2025Charles Schwab Corp.SEC
Mar 3, 20254:31 PM ETKelly Vincent DOfficer30.0K$501.9KMar 3, 2025MERRILLSEC
Mar 3, 20254:02 PM ETBraeside Capital II, L.P.Affiliate of Director72.0K$1.19MMar 3, 2025Interactive Brokers LLCSEC
Mar 3, 20254:00 PM ETBraeside Capital, L.P.Affiliate of Director95.0K$1.57MMar 3, 2025Interactive Brokers LLCSEC
Nov 19, 202412:00 PM ETWallace Michael WOfficer12.0K$194.4KNov 19, 2024Charles Schwab & Co., Inc.SEC
Nov 13, 20245:02 PM ETKelly Vincent DOfficer50.0K$843.9KNov 13, 2024MERRILLSEC
Aug 20, 20241:50 PM ETWallace Michael WDirector25.0K$367.5KAug 20, 2024Charles Schwab CorpSEC

Showing the latest 25. See the SPOK notices from the last 12 months