Spok Holdings Inc
Ownership
Ownership Structure
Who owns Spok Holdings Inc (SPOK)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 87.0% of the shares are freely tradable; institutional investors hold 56.3%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 8.22 | 1,719,219 | +2.6 | 06/30/2026 |
| Renaissance Technologies Corp | 5.49 | 1,148,579 | -9.0 | 06/30/2026 |
| Vanguard Capital Management, LLC | 4.17 | 872,359 | +1.5 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 3.43 | 717,616 | +0.2 | 06/30/2026 |
| Geode Capital Management, LLC | 2.85 | 595,842 | +9.2 | 06/30/2026 |
| State Street Corp | 2.25 | 471,584 | +2.1 | 06/30/2026 |
| HighTower Advisors, LLC | 1.62 | 339,892 | -11.0 | 06/30/2026 |
| Qube Research & Technologies | 1.38 | 287,617 | +67.2 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Vanguard MStar Total Stk Mkt Idx Invest | 2.94 | 615,117 | +0.0 | 09/30/2026 |
| iShares Russell 2000 ETF | 2.43 | 508,241 | -1.1 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Stein Todd J | Director | 620,100 | 7,503,210 $ | Oct 1, 2026 | both |
| Byrne Barbara Peterson | Director | 48,776 | 590,190 $ | Oct 1, 2026 | direct |
| Shockley Brett A | Director | 43,062 | 521,050 $ | Oct 1, 2026 | direct |
| Hyun Randy | Director | 41,385 | 500,759 $ | Oct 1, 2026 | direct |
| Cournoyer Christine | Director | 18,644 | 225,592 $ | Oct 1, 2026 | direct |
| Woods-Keisling Sharon | Corporate Secretary, Treasurer | 6,036 | 73,036 $ | Aug 10, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Oct 1, 2026 | Stein Todd J | Director | Other | 0 | 0.00 | – |
| Oct 1, 2026 | Stein Todd J | Director | Other | 2,383 | 10.49 | 24,998 |
| Oct 1, 2026 | Hyun Randy | Director | Other | 2,383 | 10.49 | 24,998 |
| Oct 1, 2026 | Shockley Brett A | Director | Other | 2,383 | 10.49 | 24,998 |
| Oct 1, 2026 | Byrne Barbara Peterson | Director | Other | 2,383 | 10.49 | 24,998 |
| Oct 1, 2026 | Cournoyer Christine | Director | Other | 2,383 | 10.49 | 24,998 |
| Aug 10, 2026 | Woods-Keisling Sharon | Corporate Secretary, Treasurer | Sell | 20,000 | 11.30 | 225,940 |
| Aug 10, 2026 | Cournoyer Christine | Director | Sell | 8,320 | 11.28 | 93,870 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.