New Positions
23 managers initiated
Top five by reported value
- Virtus ETF Advisers LLC$302.9K
- BOOTHBAY FUND MANAGEMENT, LLC$293.2K
- Magnetar Financial LLC$283.3K
- Brevan Howard Capital Management LP$253.1K
- Point72 Asset Management, L.P.$247.0K
Spok Holdings Inc NASDAQ NMS - GLOBAL MARKET:SPOK
Institutional holders, quarter-over-quarter share deltas, and new and closed positions disclosed in Form 13F. Period 2025-12-31 · prior 2025-09-30.
23 new38 added71 reduced34 exited
Total Institutional Holders
132
as of 2025-12-31
Top Holder
BlackRock, Inc.
$23.7M
Largest QoQ Increase
Uniplan Investment Counsel, Inc.
+153,579 sh
Largest QoQ Decrease
BlackRock, Inc.
-135,713 sh
New Positions(23)
Added To(38)
| Manager | Shares | Δ Shares | Value | Δ Value | % Δ |
|---|---|---|---|---|---|
| RENAISSANCE TECHNOLOGIES LLC | 1,246,579 | +74,029 | $16.4M | -$3.8M | 6.3% |
| VANGUARD GROUP INC | 1,229,078 | +74,447 | $16.2M | -$3.7M | 6.4% |
| Uniplan Investment Counsel, Inc. | 314,821 | +153,579 | $4.2M | +$1.4M | 95.2% |
| FMR LLC | 126,982 | +107,153 | $1.7M | +$1.3M | 540.4% |
| MILLENNIUM MANAGEMENT LLC | 125,808 | +97,515 | $1.7M | +$1.2M | 344.7% |
| Quantinno Capital Management LP | 92,726 | +81,941 | $1.2M | +$1.0M | 759.8% |
| Trexquant Investment LP | 170,653 | +81,784 | $2.3M | +$717.9K | 92.0% |
| CITADEL ADVISORS LLC | 80,492 | +57,135 | $1.1M | +$658.8K | 244.6% |
| Bank of New York Mellon Corp | 212,816 | +16,905 | $2.8M | -$572.4K | 8.6% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 118,967 | +54,803 | $1.6M | +$462.3K | 85.4% |
| Qube Research & Technologies Ltd | 178,092 | +16,117 | $2.3M | -$445.0K | 9.9% |
| LOS ANGELES CAPITAL MANAGEMENT LLC | 102,021 | +36,336 | $1.4M | +$277.9K | 55.3% |
| FIRST TRUST ADVISORS LP | 65,119 | +1,600 | $858.9K | -$236.8K | 2.5% |
| D. E. Shaw & Co., Inc. | 70,628 | +30,086 | $931.6K | +$232.2K | 74.2% |
| AMERICAN CENTURY COMPANIES INC | 43,683 | +276 | $576.2K | -$172.6K | 0.6% |
| PANAGORA ASSET MANAGEMENT INC | 93,085 | +31,859 | $1.2M | +$171.6K | 52.0% |
| MORGAN STANLEY | 177,693 | +33,630 | $2.3M | -$141.3K | 23.3% |
| Campbell & CO Investment Adviser LLC | 49,038 | +19,504 | $646.8K | +$137.3K | 66.0% |
| Engineers Gate Manager LP | 36,356 | +3,104 | $479.5K | -$94.1K | 9.3% |
| VICTORY CAPITAL MANAGEMENT INC | 37,037 | +14,149 | $488.5K | +$93.7K | 61.8% |
| Man Group plc | 26,439 | +1,065 | $348.7K | -$89.0K | 4.2% |
| AMERIPRISE FINANCIAL INC | 20,009 | +912 | $263.9K | -$65.5K | 4.8% |
| BARCLAYS PLC | 43,897 | +1,690 | $776.1K | +$48.0K | 4.0% |
| OCCUDO QUANTITATIVE STRATEGIES LP | 13,532 | +754 | $178.5K | -$41.9K | 5.9% |
| ALLIANCEBERNSTEIN L.P. | 24,160 | +3,500 | $318.7K | -$37.7K | 16.9% |
| AlphaQuest LLC | 9,168 | +217 | $120.9K | -$33.5K | 2.4% |
| CITIGROUP INC | 7,032 | +156 | $92.8K | -$25.9K | 2.3% |
| Police & Firemen's Retirement System of New Jersey | 6,597 | +394 | $87.0K | -$20.0K | 6.3% |
| Tower Research Capital LLC (TRC) | 2,702 | +1,607 | $35.6K | +$16.8K | 146.8% |
| GAMMA Investing LLC | 1,839 | +1,207 | $24.3K | +$13.4K | 191.0% |
| NISA INVESTMENT ADVISORS, LLC | 792 | +746 | $10.4K | +$9.7K | 1621.7% |
| WELLS FARGO & COMPANY/MN | 29,634 | +6,745 | $390.9K | -$4.0K | 29.5% |
| NewEdge Advisors, LLC | 643 | +194 | $8.5K | +$731 | 43.2% |
| GSA CAPITAL PARTNERS LLP | 40,028 | +13,080 | $528 | +$63 | 48.5% |
| ALGERT GLOBAL LLC | 12,080 | +1,080 | $159 | -$31 | 9.8% |
| GREAT WEST LIFE ASSURANCE CO /CAN/ | 2,465 | +1,013 | $33 | +$8 | 69.8% |
| AMALGAMATED BANK | 640 | +40 | $8 | -$2 | 6.7% |
| Covestor Ltd | 486 | +28 | $7 | -$1 | 6.1% |
Reduced(71)
Sold Out(34)
Top Holders by reported value
Ranked by the dollar value reported on the latest Form 13F. Share counts reflect long positions as of 2025-12-31.
| Manager | Shares | $ Value | Δ Shares | QoQ % |
|---|---|---|---|---|
| BlackRock, Inc. | 1,799,549 | $23.7M | -135,713 | -7.0% |
| RENAISSANCE TECHNOLOGIES LLC | 1,246,579 | $16.4M | +74,029 | 6.3% |
| VANGUARD GROUP INC | 1,229,078 | $16.2M | +74,447 | 6.4% |
| DIMENSIONAL FUND ADVISORS LP | 703,826 | $9.3M | -15,224 | -2.1% |
| GEODE CAPITAL MANAGEMENT, LLC | 598,552 | $7.9M | -2,674 | -0.4% |
| STATE STREET CORP | 446,919 | $5.9M | -10,509 | -2.3% |
| HighTower Advisors, LLC | 382,375 | $5.0M | -25,636 | -6.3% |
| GOLDMAN SACHS GROUP INC | 362,471 | $4.8M | -33,429 | -8.4% |
| Uniplan Investment Counsel, Inc. | 314,821 | $4.2M | +153,579 | 95.2% |
| NORTHERN TRUST CORP | 217,094 | $2.9M | -23,892 | -9.9% |
| Bank of New York Mellon Corp | 212,816 | $2.8M | +16,905 | 8.6% |
| Connor, Clark & Lunn Investment Management Ltd. | 196,865 | $2.6M | -61,419 | -23.8% |
| Qube Research & Technologies Ltd | 178,092 | $2.3M | +16,117 | 9.9% |
| MORGAN STANLEY | 177,693 | $2.3M | +33,630 | 23.3% |
| Trexquant Investment LP | 170,653 | $2.3M | +81,784 | 92.0% |
| FMR LLC | 126,982 | $1.7M | +107,153 | 540.4% |
| MILLENNIUM MANAGEMENT LLC | 125,808 | $1.7M | +97,515 | 344.7% |
| North Star Investment Management Corp. | 122,000 | $1.6M | 0 | 0.0% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 118,967 | $1.6M | +54,803 | 85.4% |
| LOS ANGELES CAPITAL MANAGEMENT LLC | 102,021 | $1.4M | +36,336 | 55.3% |
New & Closed Positions this quarter
Closed Positions
34 managers exited
Top five by prior-quarter value
Methodology
Form 13F is the SEC's quarterly disclosure for institutional investment managers exercising discretion over $100 million or more in qualifying U.S. equity securities. Managers must file within 45 days of each calendar quarter end, which is why holdings shown here reflect a snapshot at the period date — not real-time positioning.
Quarter-over-quarter deltas compare each manager's most recently reported share count for SPOK against its prior-quarter count. New positions are entries where the prior count was zero; closed positions are entries where the current count is zero. Amendments (13F-HR/A) replace prior filings for the same period.
Source: SEC EDGAR Form 13F (XML information tables). Dollar values are as reported by the manager and may use mid-quarter pricing conventions. CUSIP-to-ticker resolution is best-effort.