Spok Holdings, Inc. (SPOK) ownership: Top institutional holder: BlackRock Fund Advisors ($54.34M). Insider activity: Net Seller (4 buys, 16 sells). SEC EDGAR first-party data.
| Holder | Shares | Market Value | Reported |
|---|---|---|---|
| BlackRock Fund Advisors | 2618570.00 | $54.34M | 2016-12-31 |
| BlackRock, Inc. | 1676227.00 | $18.27M | 2026-03-31 |
| VANGUARD GROUP INC | 1229078.00 | $16.21M | 2025-12-31 |
| RENAISSANCE TECHNOLOGIES LLC | 1261579.00 | $13.75M | 2026-03-31 |
| VANGUARD CAPITAL MANAGEMENT LLC | 859530.00 | $9.37M | 2026-03-31 |
| DIMENSIONAL FUND ADVISORS LP | 715869.00 | $7.80M | 2026-03-31 |
| GEODE CAPITAL MANAGEMENT, LLC | 545718.00 | $5.95M | 2026-03-31 |
| STATE STREET CORP | 461790.00 | $5.03M | 2026-03-31 |
| Insider | Transaction | Value | Date |
|---|---|---|---|
| Buy | null | 2026-06-16 | |
| Buy | null | 2026-06-16 | |
| Sell | null | 2026-05-12 | |
| Sell | null | 2026-05-11 | |
| Sell | null | 2026-05-11 | |
| Buy | null | 2026-05-11 | |
| Sell | null | 2026-05-11 | |
| Buy | null | 2026-05-11 |
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Institutional data from SEC Form 13F. Insider data from SEC Form 4. Congressional data from STOCK Act disclosures. Not personalized investment advice.