SPOK HLDGS INC

Ticker: SPOK CUSIP: 84863T106 Class: COM

Note: Option positions (PUT/CALL) are excluded.

InstitutionSharesValue ($000)
BlackRock, Inc.1,799,549$23,736
RENAISSANCE TECHNOLOGIES LLC1,246,579$16,442
VANGUARD GROUP INC1,229,078$16,212
DIMENSIONAL FUND ADVISORS LP703,826$9,284
GEODE CAPITAL MANAGEMENT, LLC598,552$7,896
STATE STREET CORP446,919$5,895
HighTower Advisors, LLC382,375$5,044
GOLDMAN SACHS GROUP INC362,471$4,781
ACADIAN ASSET MANAGEMENT LLC322,043$4
CSM Advisors, LLC262,945$3
NORTHERN TRUST CORP217,094$2,863
Bank of New York Mellon Corp212,816$2,807
Connor, Clark & Lunn Investment Management Ltd.196,865$2,597
Qube Research & Technologies Ltd178,092$2,349
MORGAN STANLEY177,693$2,344
Trexquant Investment LP170,653$2,251
Uniplan Investment Counsel, Inc.160,997$2,124
FMR LLC126,982$1,675
MILLENNIUM MANAGEMENT LLC125,808$1,659
North Star Investment Management Corp.122,000$1,609
JACOBS LEVY EQUITY MANAGEMENT, INC118,967$1,569
LOS ANGELES CAPITAL MANAGEMENT LLC102,021$1,411
PANAGORA ASSET MANAGEMENT INC93,085$1,228
Quantinno Capital Management LP92,726$1,223
JPMORGAN CHASE & CO91,823$1,211
Nuveen, LLC72,818$960
D. E. Shaw & Co., Inc.70,628$932
FIRST TRUST ADVISORS LP65,119$859
TWO SIGMA INVESTMENTS, LP62,587$826
CHARLES SCHWAB INVESTMENT MANAGEMENT INC60,989$804
HSBC HOLDINGS PLC60,331$797
UBS Group AG56,955$751
CITADEL ADVISORS LLC49,692$655
Campbell & CO Investment Adviser LLC49,038$647
BARCLAYS PLC44,520$587
AMERICAN CENTURY COMPANIES INC43,683$576
TWO SIGMA ADVISERS, LP42,072$555
GSA CAPITAL PARTNERS LLP40,028$1
Keebeck Wealth Management40,000$528
VICTORY CAPITAL MANAGEMENT INC37,037$489
BANK OF AMERICA CORP /DE/36,487$481
Engineers Gate Manager LP36,356$480
RHUMBLINE ADVISERS31,534$416
Invesco Ltd.30,930$408
WELLS FARGO & COMPANY/MN29,634$391
Man Group plc26,439$349
ALLIANCEBERNSTEIN L.P.24,160$319
MARTINGALE ASSET MANAGEMENT L P23,694$313
STATE BOARD OF ADMINISTRATION OF FLORIDA RETIREMENT SYSTEM22,698$299
BOOTHBAY FUND MANAGEMENT, LLC22,231$293
Magnetar Financial LLC21,481$283
AMERIPRISE FINANCIAL INC20,009$264
Brevan Howard Capital Management LP19,185$253
Hennion & Walsh Asset Management, Inc.18,846$249
Point72 Asset Management, L.P.18,725$247
AQR CAPITAL MANAGEMENT LLC16,366$216
Squarepoint Ops LLC16,112$213
CANADA PENSION PLAN INVESTMENT BOARD15,200$200
Significant Wealth Partners LLC14,798$195
Virtus ETF Advisers LLC14,663$193
Hillsdale Investment Management Inc.14,100$186
JANE STREET GROUP, LLC13,764$182
OCCUDO QUANTITATIVE STRATEGIES LP13,532$178
DEUTSCHE BANK AG\13,154$174
Grantham, Mayo, Van Otterloo & Co. LLC12,307$162
Cambria Investment Management, L.P.12,154$160
ALGERT GLOBAL LLC12,080$0
STATE OF WISCONSIN INVESTMENT BOARD11,100$146
MetLife Investment Management, LLC11,051$146
PRICE T ROWE ASSOCIATES INC /MD/10,744$0
PUBLIC EMPLOYEES RETIREMENT SYSTEM OF OHIO10,673$141
OXFORD ASSET MANAGEMENT LLP10,352$137
MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd.9,445$125
AlphaQuest LLC9,168$121
Truvestments Capital LLC8,828$116
CITIGROUP INC7,032$93
Versant Capital Management, Inc6,650$88
Police & Firemen's Retirement System of New Jersey6,597$87
New Age Alpha Advisors, LLC5,855$77
Aquatic Capital Management LLC4,966$66
Triumph Capital Management4,801$63
BNP PARIBAS ARBITRAGE, SA4,686$62
Legal & General Group Plc3,954$52
State of Wyoming3,846$51
Russell Investments Group, Ltd.3,738$49
ROYAL BANK OF CANADA3,100$40
Tower Research Capital LLC (TRC)2,702$36
GREAT WEST LIFE ASSURANCE CO /CAN/2,465$0
Ameritas Investment Partners, Inc.2,080$27
Larson Financial Group LLC2,000$26
GAMMA Investing LLC1,839$24
SBI Securities Co., Ltd.1,747$23
Kestra Advisory Services, LLC1,738$23
McIlrath & Eck, LLC1,451$19
CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM1,252$17
Sterling Capital Management LLC1,174$15
CWM, LLC857$0
NISA INVESTMENT ADVISORS, LLC792$10
State of Alaska, Department of Revenue653$0
NewEdge Advisors, LLC643$8
32 other institutions4,914$49
Total (132 institutions)11,050,988$137,225