SPOK Spok Holdings Inc.
Spok Holdings Inc. (SPOK) Institutional Ownership
What the institutions did with SPOK last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeLargest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 1.7M | 15.9% |
| RENAISSANCE TECHNOLOGIES LLC | 1.1M | 10.6% |
| VANGUARD CAPITAL MANAGEMENT LLC | 872.4K | 8.1% |
| DIMENSIONAL FUND ADVISORS LP | 717.6K | 6.6% |
| GEODE CAPITAL MANAGEMENT, LLC | 595.8K | 5.5% |
| STATE STREET CORP | 471.6K | 4.4% |
| HighTower Advisors, LLC | 339.9K | 3.1% |
| Qube Research & Technologies Ltd | 287.6K | 2.7% |
| GOLDMAN SACHS GROUP INC | 282.0K | 2.6% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 273.3K | 2.5% |
| Bank of New York Mellon Corp | 234.1K | 2.2% |
| NORTHERN TRUST CORP | 222.9K | 2.1% |
| Uniplan Investment Counsel, Inc. | 215.8K | 2.0% |
| CSM Advisors, LLC | 212.9K | 2.0% |
| UNITED CAPITAL FINANCIAL ADVISORS, LLC | 194.8K | 1.8% |
| CITADEL ADVISORS LLC | 183.4K | 1.7% |
| MORGAN STANLEY | 166.6K | 1.5% |
| JACOBS LEVY EQUITY MANAGEMENT, INC | 160.3K | 1.5% |
| GSA CAPITAL PARTNERS LLP | 150.1K | 1.4% |
| VANGUARD FIDUCIARY TRUST CO | 136.9K | 1.3% |
| D. E. Shaw & Co., Inc. | 130.2K | 1.2% |
| Connor, Clark & Lunn Investment Management Ltd. | 107.5K | 1.0% |
| PANAGORA ASSET MANAGEMENT INC | 93.0K | 0.9% |
| North Star Investment Management Corp. | 90.0K | 0.8% |
| FMR LLC | 89.2K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| CITADEL ADVISORS LLC | Increased | 17.8K | 183.4K | +165.7K |
| Qube Research & Technologies Ltd | Increased | 172.1K | 287.6K | +115.6K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 1.3M | 1.1M | -113.0K |
| MARSHALL WACE, LLP | Sold Out | 112.8K | 0 | -112.8K |
| UNITED CAPITAL FINANCIAL ADVISORS, LLC | Increased | 104.7K | 194.8K | +90.1K |
| Trexquant Investment LP | Reduced | 128.9K | 39.2K | -89.7K |
| FMR LLC | Increased | 15.0K | 89.2K | +74.1K |
| JANE STREET GROUP, LLC | Reduced | 86.5K | 15.2K | -71.3K |
| Point72 Asset Management, L.P. | Reduced | 89.6K | 19.1K | -70.5K |
| GSA CAPITAL PARTNERS LLP | Increased | 85.8K | 150.1K | +64.3K |
| Engineers Gate Manager LP | Sold Out | 64.1K | 0 | -64.1K |
| GOLDMAN SACHS GROUP INC | Increased | 219.6K | 282.0K | +62.4K |
| GEODE CAPITAL MANAGEMENT, LLC | Increased | 545.7K | 595.8K | +50.1K |
| Atom Investors LP | New | 0 | 44.3K | +44.3K |
| JACOBS LEVY EQUITY MANAGEMENT, INC | Increased | 116.8K | 160.3K | +43.5K |
| BlackRock, Inc. | Increased | 1.7M | 1.7M | +43.0K |
| HighTower Advisors, LLC | Reduced | 381.8K | 339.9K | -41.9K |
| D. E. Shaw & Co., Inc. | Increased | 89.5K | 130.2K | +40.7K |
| Dynamic Technology Lab Private Ltd | Sold Out | 37.5K | 0 | -37.5K |
| Quantinno Capital Management LP | Increased | 26.2K | 63.6K | +37.5K |
| Connor, Clark & Lunn Investment Management Ltd. | Reduced | 144.9K | 107.5K | -37.4K |
| North Star Investment Management Corp. | Reduced | 122.0K | 90.0K | -32.0K |
| Russell Investments Group, Ltd. | Increased | 7.9K | 38.8K | +31.0K |
| HSBC HOLDINGS PLC | Reduced | 41.5K | 12.1K | -29.4K |
| GUGGENHEIM CAPITAL LLC | New | 0 | 27.0K | +27.0K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.