USA Mobility Inc

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USA Mobility Inc
TickerSPOK
CIK #0001289945
CUSIP84863T106
SectorTechnology - Radiotelephone Communications
Address6677 Richmond Highway, Alexandria, VA 22306
Source [EDGAR]
CIK Filing 2011 - 2025
[0001289945] 10-K
[0001289945] 10-Q
[0001289945] 3
[0001289945] 4
[0001289945] 8-K
[0001289945] SC 13D
[0001289945] SC 13G
Form 13D/13G Filer Form 13D/13G Subject Filed % Owned
Renaissance Technologies LLC SPOK Holdings Inc [2025-08-13] 0.0
Vanguard Group Inc SPOK Holdings Inc [2025-07-29] 0.0
BlackRock Inc SPOK Holdings Inc [2024-01-26] 7.1
Acacia Research Corp SPOK Holdings Inc [2021-08-30] 6.5
Braeside Investments LLC SPOK Holdings Inc [2018-04-02] 2.9
Vanguard World Fund SPOK Holdings Inc [2017-02-13] 5.83
Dimensional Fund Advisors LP SPOK Holdings Inc [2017-02-09] 7.24
Dimensional Fund Advisors LP SPOK Holdings Inc [2016-02-09] 5.94
LSV Asset Management USA Mobility Inc [2014-02-10] 5.47
LSV Asset Management USA Mobility Inc [2013-02-13] 5.55
Braeside Investments LLC USA Mobility Inc [2012-02-02] 6.0
Form 3/4/5 Filer 2011 - 2025
Spok Holdings, Inc
Stein Todd J
Rice Calvin
Wallace Michael W
Kelly Vincent D
Shockley Brett A
Cournoyer Christine
Byrne Barbara Peterson
Hyun Randy
Woods-Keisling Sharon
Yudkoff Royce
Oristano Matthew
Hylton Stacia
Butterfield Nathaniel Blair
OReilly Brian
Culp-Fingerhut Bonnie
Thompson Samme L
Goel Hemant
Peterman Ted
Saine Tom
Endsley Shawn Eric
Gallopo Nicholas A
Brogan Danielle
Balmforth Colin
Boso Jim
Collins Sean
Ash Gary
Chang Myle Nguyen
Bolseth Katherine
Danko Lynn
Heim Christopher
Grandfield Paul
Mayleben Daniel Robert
Form 13F Holdings
Firm Period DFND Voting Shares
BlackRock, Inc. [2025-06-30] SOLE 1,676,732 1,722,874
Vanguard Group Inc [2025-06-30] SOLE 0 1,131,044
Renaissance Technologies LLC [2025-06-30] SOLE 1,056,650 1,056,650
Dimensional Fund Advisors LP [2025-06-30] SOLE 649,994 668,919
Goldman Sachs Group Inc [2025-06-30] DFND 519,294 519,374
Geode Capital Management LLC [2025-06-30] DFND 518,327 518,327
Hightower Advisors LLC [2025-06-30] SOLE 452,809 452,809
State Street Corp [2025-06-30] DFND 423,777 445,177
Northern Trust Corp [2025-06-30] DFND 206,686 239,809
JPMorgan Chase & Co [2025-06-30] DFND 196,401 224,053
Connor Clark & Lunn Investment Management Ltd [2025-06-30] SOLE 198,978 198,978
Bank of New York Mellon Corp [2025-06-30] DFND 189,665 195,507
Uniplan Investment Counsel Inc [2025-06-30] SOLE 188,228 188,228
Morgan Stanley [2025-06-30] DFND 126,673 152,423
Prelude Capital Management LLC [2025-06-30] OTR 0 148,185
Qube Research & Technologies Ltd [2025-06-30] SOLE 145,818 145,818
North Star Investment Management Corp. [2025-06-30] SOLE 122,000 122,000
Trexquant Investment LP [2025-06-30] SOLE 111,481 111,481
Two Sigma Investments LP [2025-06-30] SOLE 108,769 108,769
Two Sigma Advisers LP [2025-06-30] SOLE 77,600 78,500
Nuveen, LLC [2025-06-30] DFND 72,818 72,818
Citadel Advisors LLC [2025-06-30] DFND 65,417 65,417
Susquehanna International Group LLP [2025-06-30] OTR 27,103 64,803
Jacobs Levy Equity Management Inc [2025-06-30] SOLE 40,679 64,667
Los Angeles Capital Management LLC [2025-06-30] SOLE 20,950 63,810
Charles Schwab Investment Management Inc [2025-06-30] SOLE 60,930 60,930
Caption Management LLC [2025-06-30] SOLE 52,532 52,532
Hennion & Walsh Asset Management Inc [2025-06-30] SOLE 51,678 51,678
Inspire Investing LLC [2025-06-30] SOLE 0 51,504
Prudential Financial Inc [2025-06-30] DFND 48,820 49,640
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