Spok Holdings
SPOK · NASDAQ
$10.55+$0.12 (+1.15%)TodayMarket closed ·
Prev close $10.43
Who owns SPOK
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 35.1% of SPOK’s shares.
- BlackRock Institutional Trust Company, N.A.7.5%
- Renaissance Technologies LLC5.5%
- Braeside Investments, LLC5.1%
- Vanguard Capital Management, LLC4.2%
- Next 6 largest institutions12.9%
- All other shareholders64.9%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 1.56M | 7.47% |
| Renaissance Technologies LLC | 1.15M | 5.50% |
| Braeside Investments, LLC | 1.06M | 5.10% |
| Vanguard Capital Management, LLC | 872.36K | 4.18% |
| Dimensional Fund Advisors, L.P. | 717.62K | 3.44% |
| Geode Capital Management, L.L.C. | 595.84K | 2.85% |
| State Street Investment Management (US) | 471.58K | 2.26% |
| Hightower Advisors, LLC | 339.89K | 1.63% |
| Qube Research & Technologies Ltd | 287.62K | 1.38% |
| Vanguard Portfolio Management, LLC | 273.28K | 1.31% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| Vanguard Total Stock Market Index Fund | 615.12K | 2.94% |
| iShares Russell 2000 ETF | 503.27K | 2.41% |
| Fidelity Small Cap Index Fund | 253.74K | 1.21% |
| Vanguard Extended Market Index Fund | 238.04K | 1.14% |
| iShares Russell 2000 Value ETF | 214.13K | 1.03% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $473.52K (3 trades) and sold $429.85K (3 trades) of SPOK on the open market.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Stein Todd J | Award | 2.38K | $25.00K |
| Hyun Randy | Award | 2.38K | $25.00K |
| Byrne Barbara Peterson | Award | 2.38K | $25.00K |
| COURNOYER CHRISTINE | Award | 2.38K | $25.00K |
| SHOCKLEY BRETT A | Award | 2.38K | $25.00K |
| Woods-Keisling Sharon | Sale | 20.00K | $225.94K |
| COURNOYER CHRISTINE | Sale | 8.32K | $93.87K |
| Woods-Keisling Sharon | Award | 5.30K | — |
| Woods-Keisling Sharon | Award | 5.30K | — |
| KELLY VINCENT D | Award | 22.93K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 691.44K
- Days to cover
- 5.21
- % of shares outstanding
- 3.31%
- Average daily volume
- 132.80K
- Change since last report
- +1.7%
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