Ranked by reported Q1 2026 13F market value
Share of total reported institutional value in SPOK held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 1.7M | $18.3M | -6.9% | 8.086% | 0.00% |
| 2 | RENAISSANCE TECHNOLOGIES LLC | 1.3M | $13.8M | +1.2% | 6.086% | 0.02% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 860K | $9.4M | — | 4.146% | 0.00% |
| 4 | DIMENSIONAL FUND ADVISORS LP | 716K | $7.8M | +1.7% | 3.453% | 0.00% |
| 5 | GEODE CAPITAL MANAGEMENT, LLC | 546K | $5.9M | -8.8% | 2.633% | 0.00% |
| 6 | STATE STREET CORP | 462K | $5.0M | +3.3% | 2.228% | 0.00% |
| 7 | HighTower Advisors, LLC | 382K | $4.2M | -0.1% | 1.842% | 0.00% |
| 8 | VANGUARD PORTFOLIO MANAGEMENT LLC | 265K | $2.9M | — | 1.278% | 0.00% |
| 9 | GOLDMAN SACHS GROUP INC | 220K | $2.4M | -39.4% | 1.059% | 0.00% |
| 10 | Bank of New York Mellon Corp | 218K | $2.4M | +2.3% | 1.051% | 0.00% |
| 11 | NORTHERN TRUST CORP | 217K | $2.4M | -0.3% | 1.045% | 0.00% |
| 12 | Uniplan Investment Counsel, Inc. | 210K | $2.3M | +36.3% | 1.011% | 0.23% |
| 13 | Qube Research & Technologies Ltd | 172K | $1.9M | -3.4% | 0.830% | 0.00% |
| 14 | MORGAN STANLEY | 160K | $1.7M | -10.1% | 0.771% | 0.00% |
| 15 | Connor, Clark & Lunn Investment Management Ltd. | 145K | $1.6M | -26.4% | 0.699% | 0.00% |
| 16 | VANGUARD FIDUCIARY TRUST CO | 129K | $1.4M | — | 0.624% | 0.00% |
| 17 | Trexquant Investment LP | 129K | $1.4M | -24.5% | 0.622% | 0.01% |
| 18 | North Star Investment Management Corp. | 122K | $1.3M | 0.0% | 0.588% | 0.08% |
| 19 | JACOBS LEVY EQUITY MANAGEMENT, INC | 117K | $1.3M | -1.8% | 0.564% | 0.01% |
| 20 | MARSHALL WACE, LLP | 113K | $1.2M | — | 0.544% | 0.00% |
| 21 | UNITED CAPITAL FINANCIAL ADVISERS, LLC | 105K | $1.1M | — | 0.505% | 0.01% |
| 22 | Point72 Asset Management, L.P. | 90K | $977K | +378.7% | 0.432% | 0.00% |
| 23 | D. E. Shaw & Co., Inc. | 89K | $975K | +26.7% | 0.432% | 0.00% |
| 24 | JANE STREET GROUP, LLC | 87K | $943K | +528.6% | 0.417% | 0.01% |
| 25 | PANAGORA ASSET MANAGEMENT INC | 78K | $853K | -15.9% | 0.378% | 0.00% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in SPOK — a direct measure of their conviction.
Filings activity in SPOK during Q1 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q1 2026 | 135 | +3.8% | 48.70% | 11.70 pp | $110M | 19% |
| Q4 2025 | 130 | 6.5% | 60.40% | 20.46 pp | $136M | 25% |
| Q3 2025 | 139 | +7.8% | 80.86% | +1.71 pp | $183M | +2.2% |
| Q2 2025 | 129 | +4.9% | 79.15% | +7.43 pp | $179M | +10% |
| Q1 2025 | 123 | +7.0% | 71.72% | +3.41 pp | $162M | +5.0% |
| Q4 2024 | 115 | +7.5% | 68.31% | +5.37 pp | $154M | +8.5% |
| Q3 2024 | 107 | 7.8% | 62.94% | 0.85 pp | $142M | 1.3% |
| Q2 2024 | 116 | — | 63.79% | — | $144M | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying SPOK stock.
Based on Q1 2026 13F filings, institutional ownership of Spok Holdings, Inc. stands at 48.7%, held across 135 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of SPOK, with approximately 1,676,227 shares worth $0.02B as of Q1 2026.
Yes — 3 widely-followed marquee investors appear among the top 25 institutional holders of SPOK, including RENAISSANCE TECHNOLOGIES LLC, Point72 Asset Management, L.P., JANE STREET GROUP, LLC.
Our composite Smart Money Score for SPOK is 53 out of 100 (Neutral). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
25 institutions opened new positions in SPOK during Q1 2026, while 20 fully exited. 30 added to existing positions and 79 trimmed.
SPOK institutional ownership fell by 11.70 percentage points quarter-over-quarter, with a net change of +5 holders.
The top 10 institutions account for 65.4% of all reported 13F value in SPOK, and the top 25 account for 84.8%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Spok Holdings, Inc. (SPOK) Institutional Ownership