SPOK HOLDINGS INC (SPOK) Top Institutional Shareholders
SPOK HOLDINGS INC (SPOK) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended March 31, 2026. The institutional investors covered on this page collectively reported approximately $110.26M in SPOK holdings during the latest filing period.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of SPOK tracked by InsiderSet, reporting ownership valued at approximately $18.27M in its March 31, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $17.28M, representing an estimated loss of -5.41% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 65% of the total disclosed SPOK value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Renaissance Technologies LLC, Vanguard Capital Management Llc, and several other long-term asset managers with concentrated positions in SPOK HOLDINGS INC (SPOK).
This page ranks the largest institutional SPOK shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
136
Total Reported Value
$110.26M
Largest Holder
Blackrock, Inc.
Largest Position
$18.27M
Insider Transactions (90d)
0
Latest Filing Quarter
Q1 2026
New Institutional Positions
154
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.00% | 1,676,227 | $18,270,870 | $17,281,900 | -$988,970 | -5.41% | |
| Renaissance Technologies LLC | Jim Simons | 0.02% | 1,261,579 | $13,751,211 | $13,006,879 | -$744,332 | -5.41% |
| Vanguard Capital Management Llc | 0.00% | 859,530 | $9,368,877 | $8,861,754 | -$507,123 | -5.41% | |
| Dimensional Fund Advisors Lp | 0.00% | 715,869 | $7,803,828 | $7,380,609 | -$423,219 | -5.42% | |
| Geode Capital Management, Llc | 0.00% | 545,718 | $5,949,681 | $5,626,353 | -$323,328 | -5.43% | |
| State Street Corp | 0.00% | 461,790 | $5,033,511 | $4,761,055 | -$272,456 | -5.41% | |
| Hightower Advisors, Llc | 0.00% | 381,815 | $4,161,787 | $3,936,513 | -$225,274 | -5.41% | |
| Vanguard Portfolio Management Llc | 0.00% | 265,028 | $2,888,805 | $2,732,439 | -$156,366 | -5.41% | |
| Goldman Sachs Group Inc | 0.00% | 219,581 | $2,393,436 | $2,263,880 | -$129,556 | -5.41% | |
| Bank Of New York Mellon Corp | 0.00% | 217,803 | $2,374,054 | $2,245,549 | -$128,505 | -5.41% | |
| Northern Trust Corp | 0.00% | 216,543 | $2,360,318 | $2,232,558 | -$127,760 | -5.41% | |
| Uniplan Investment Counsel, Inc. | 0.23% | 209,602 | $2,284,671 | $2,160,997 | -$123,674 | -5.41% | |
| Qube Research & Technologies Ltd | 0.00% | 172,057 | $1,875,421 | $1,773,908 | -$101,513 | -5.41% | |
| Morgan Stanley | 0.00% | 159,826 | $1,742,115 | $1,647,806 | -$94,309 | -5.41% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.00% | 144,851 | $1,578,876 | $1,493,414 | -$85,462 | -5.41% | |
| Vanguard Fiduciary Trust Co | 0.00% | 129,248 | $1,408,803 | $1,332,547 | -$76,256 | -5.41% | |
| Trexquant Investment Lp | 0.01% | 128,856 | $1,404,530 | $1,328,505 | -$76,025 | -5.41% | |
| North Star Investment Management Corp. | 0.08% | 122,000 | $1,329,800 | $1,257,820 | -$71,980 | -5.41% | |
| Jacobs Levy Equity Management, Inc | 0.01% | 116,810 | $1,273,229 | $1,204,311 | -$68,918 | -5.41% | |
| Marshall Wace, Llp | 0.00% | 112,789 | $1,229,400 | $1,162,855 | -$66,545 | -5.41% | |
| United Capital Financial Advisors, Llc | 0.01% | 104,723 | $1,141,481 | $1,079,694 | -$61,787 | -5.41% | |
| Point72 Asset Management, L.P. | 0.00% | 89,627 | $976,934 | $924,054 | -$52,880 | -5.41% | |
| D. E. Shaw & Co., Inc. | 0.00% | 89,451 | $975,015 | $922,240 | -$52,775 | -5.41% | |
| Jane Street Group, Llc | 0.00% | 86,524 | $943,112 | $892,062 | -$51,050 | -5.41% | |
| Panagora Asset Management Inc | 0.00% | 78,295 | $853,415 | $807,221 | -$46,194 | -5.41% | |
| Fidelis Capital Partners, Llc | 0.06% | 75,001 | $817,511 | $773,260 | -$44,251 | -5.41% | |
| Nuveen, Llc | 0.00% | 73,336 | $799,363 | $756,094 | -$43,269 | -5.41% | |
| Numerai Gp Llc | 0.08% | 69,016 | $752,274 | $711,555 | -$40,719 | -5.41% | |
| First Trust Advisors Lp | 0.00% | 65,498 | $713,928 | $675,284 | -$38,644 | -5.41% | |
| Engineers Gate Manager Lp | 0.01% | 64,068 | $698,341 | $660,541 | -$37,800 | -5.41% | |
| Charles Schwab Investment Management Inc | 0.00% | 56,035 | $610,782 | $577,721 | -$33,061 | -5.41% | |
| Campbell & Co Investment Adviser Llc | 0.03% | 50,869 | $554,472 | $524,459 | -$30,013 | -5.41% | |
| Keebeck Wealth Management | 0.06% | 50,000 | $545,000 | $515,500 | -$29,500 | -5.41% | |
| Man Group Plc | 0.00% | 48,325 | $526,743 | $498,231 | -$28,512 | -5.41% | |
| American Century Companies Inc | 0.00% | 43,368 | $472,711 | $447,124 | -$25,587 | -5.41% | |
| Aqr Capital Management Llc | 0.00% | 43,132 | $470,139 | $444,691 | -$25,448 | -5.41% | |
| Victory Capital Management Inc | 0.00% | 42,816 | $466,694 | $441,433 | -$25,261 | -5.41% | |
| Hsbc Holdings Plc | 0.00% | 41,499 | $458,356 | $427,855 | -$30,501 | -6.65% | |
| Dynamic Technology Lab Private Ltd | 0.07% | 37,544 | $409,230 | $387,079 | -$22,151 | -5.41% | |
| Millennium Management Llc | 0.00% | 37,155 | $404,990 | $383,068 | -$21,922 | -5.41% | |
| Alliancebernstein L.P. | 0.00% | 28,160 | $371,430 | $290,330 | -$81,100 | -21.83% | |
| Rhumbline Advisers | 0.00% | 31,194 | $340,006 | $321,610 | -$18,396 | -5.41% | |
| Invesco Ltd. | 0.00% | 30,475 | $332,178 | $314,197 | -$17,981 | -5.41% | |
| Ubs Group Ag | 0.00% | 29,018 | $316,296 | $299,176 | -$17,120 | -5.41% | |
| Bridgeway Capital Management, Llc | 0.01% | 26,600 | $289,940 | $274,246 | -$15,694 | -5.41% | |
| Bank Of America Corp | 0.00% | 26,528 | $289,155 | $273,504 | -$15,651 | -5.41% | |
| Quantinno Capital Management Lp | 0.00% | 26,150 | $285,040 | $269,607 | -$15,434 | -5.41% | |
| Martingale Asset Management L P | 0.01% | 23,025 | $250,973 | $237,388 | -$13,585 | -5.41% | |
| State Of Wisconsin Investment Board | 0.00% | 20,300 | $221,270 | $209,293 | -$11,977 | -5.41% | |
| Two Sigma Investments, Lp | 0.00% | 19,900 | $216,910 | $205,169 | -$11,741 | -5.41% |
Frequently asked questions about SPOK
Who owns the most SPOK stock?
The largest holders of SPOK are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for SPOK HOLDINGS INC (SPOK).
Is SPOK widely held by superinvestors?
Many widely followed stocks like SPOK appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly SPOK is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.