Spok Holdings, Inc.
Spok Holdings, Inc. (SPOK) Stock Ownership
Institutional vs insider vs public ownership from 13F and float data — top holders, activity, and insider trades below.
SEC 13F · FMP · SPOK · as of Sep 30, 2025
Ownership Breakdown
146
Institutional Holders
▲ 11 vs Q2
$197.78M
Total Inst. Value
▲ $3.26M vs Q2
20.89M
Shares Outstanding
freeFloat 86.57%
11.47M
13F Shares Held
▼ 10.71M vs Q2
Institutional ownership = 13F shares ÷ total outstanding. Insider % = 100 − free float. Public % = free float − institution %. Data: FMP /symbol-positions-summary + /shares-float + SEC EDGAR.
Top Institutional Holders
SPOK largest shareholders · institutional ownership
Q3 2025 · SEC 13F
Showing top 10 holders
| Holder | Shares | % Owned | Weight | Value | Reported | Change |
|---|---|---|---|---|---|---|
BLACKROCK, INC. radiotelephone communications | 1.94M | 9.44% | 9.44% | $33.38B | Nov 12, 2025 | ▲ 212.4K |
RENAISSANCE TECHNOLOGIES LLC radiotelephone communications | 1.17M | 5.72% | 5.72% | $20.23B | Nov 13, 2025 | ▲ 115.9K |
VANGUARD GROUP INC radiotelephone communications | 1.15M | 5.63% | 5.63% | $19.92B | Nov 7, 2025 | ▲ 6.1K |
DIMENSIONAL FUND ADVISORS LP radiotelephone communications | 719.0K | 3.51% | 3.51% | $12.40B | Nov 12, 2025 | ▲ 8.2K |
GEODE CAPITAL MANAGEMENT, LLC radiotelephone communications | 601.2K | 2.93% | 2.93% | $10.37B | Nov 12, 2025 | ▲ 82.9K |
STATE STREET CORP radiotelephone communications | 457.4K | 2.23% | 2.23% | $7.89B | Nov 14, 2025 | ▲ 12.3K |
ACADIAN ASSET MANAGEMENT LLC radiotelephone communications | 428.1K | 2.09% | 2.09% | $7.38B | Nov 13, 2025 | ▲ 38.1K |
HIGHTOWER ADVISORS, LLC radiotelephone communications | 408.0K | 1.99% | 1.99% | $7.04B | Nov 7, 2025 | ▼ 44.8K |
GOLDMAN SACHS GROUP INC radiotelephone communications | 395.9K | 1.93% | 1.93% | $6.83B | Nov 14, 2025 | ▼ 134.0K |
CSM ADVISORS, LLC radiotelephone communications | 334.3K | 1.63% | 1.63% | $5.77B | Nov 14, 2025 | ▼ 14.8K |
Data from SEC Form 13F filings. Ownership bar normalised to largest holder. Change flags: isNew / isSoldOut / changeInSharesNumber (FMP extract-analytics/holder).
Institutional Activity
Q3 2025 vs prior quarter
Q3 2025
30
Increased
+930.4K shares2
New Positions
first time holders15
Decreased
−397.7K shares0
Sold Out
fully exitedNet shares change (top 50)
+532.6K
+930.4K / −397.7K
Net new holders
+17
2 new / 0 exited
Based on top 50 institutional holders by position size. Fields: isNew, isSoldOut, changeInSharesNumber (FMP extract-analytics/holder, limit=50).
Insider Buying vs Selling
SPOK insider trading · insider activity
Source: SEC Form 4
Insiders have been net buyers of shares recently. Selling may be driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment.
13
Buy transactions
3
Sell transactions
4.33
Buy/Sell ratio
$0M
Total disposed
Recent Insider Transactions
Showing 10 most recent · Common Stock only
| Name · Role | Date | Type | Shares | Price | Value | After Trans. | Filing |
|---|---|---|---|---|---|---|---|
KELLY VINCENT D President & CEO | May 12, 2026 | Purchase | 5,000 | $10.70 | $53.5K | 167.6K | Form 4 ↗ |
KELLY VINCENT D President & CEO | May 11, 2026 | Purchase | 5,000 | $10.67 | $53.3K | 162.6K | Form 4 ↗ |
Woods-Keisling Sharon Corporate Secretary, Treasurer | May 5, 2026 | Sale | 10,000 | $11.00 | $110.0K | 26.0K | Form 4 ↗ |
Rice Calvin Chief Financial Officer & CAO | Apr 14, 2026 | Award | 0 | — | — | 21.4K | Form 4 ↗ |
Byrne Barbara Peterson director | Apr 1, 2026 | Award | 2,294 | $10.90 | $25.0K | 44.0K | Form 4 ↗ |
Byrne Barbara Peterson director | Apr 1, 2026 | Award | 0 | — | — | 5.6K | Form 4 ↗ |
COURNOYER CHRISTINE director | Apr 1, 2026 | Award | 2,294 | $10.90 | $25.0K | 22.1K | Form 4 ↗ |
COURNOYER CHRISTINE director | Apr 1, 2026 | Award | 0 | — | — | 5.6K | Form 4 ↗ |
SHOCKLEY BRETT A director | Apr 1, 2026 | Award | 2,294 | $10.90 | $25.0K | 38.2K | Form 4 ↗ |
Hyun Randy director | Apr 1, 2026 | Award | 2,294 | $10.90 | $25.0K | 36.6K | Form 4 ↗ |
Source: /insider-trading/search (FMP stable). Buy/Sell direction: acquisitionOrDisposition A=Buy, D=Sell. RSU vesting (M-Exempt) excluded from sentiment bar. All data from SEC EDGAR public filings.
About institutional & insider ownership
Spok Holdings, Inc. (SPOK) is primarily owned by institutional investors, who hold approximately 54.9% of total shares outstanding. Company insiders own approximately 13.43%, while retail and public investors account for the remaining 31.68%.
The largest institutional shareholder of Spok Holdings, Inc. is BLACKROCK, INC., holding approximately 1.94 million shares — equal to 9.44% of outstanding shares — as of September 30, 2025.
A total of 146 institutional investors currently hold SPOK stock, with a combined institutional value of approximately $197,781,270 as of the most recent 13F filing period.
Frequently asked questions
SPOK ownershipSpok Holdings, Inc. (SPOK) is primarily owned by institutional investors, who hold approximately 54.9% of shares. The largest shareholder is BLACKROCK, INC. with a 9.44% stake. Company insiders hold 13.43%. Data sourced from SEC Form 13F as of September 30, 2025.