Ticker · CUSIP 84863T106
Holders (tracked)
11
Combined shares
1,644,236
Combined value
$21.55M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+3 vs previous quarter over the last 8.
SEC event timeline
13 events
- Ken Griffin (Citadel Advisors) added2026-02-17+26,335 shares · 2025Q413F
- Two Sigma Investments trimmed2026-02-17−106,644 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) added2026-02-17+97,515 shares · 2025Q413F
- Steve Cohen (Point72) opened position2026-02-17+18,725 shares · 2025Q413F
- D.E. Shaw & Co. added2026-02-17+30,086 shares · 2025Q413F
- AQR Capital Management trimmed2026-02-17−26,914 shares · 2025Q413F
- Renaissance Technologies added2026-02-12+74,029 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2025-11-14−11,435 shares · 2025Q313F
- AQR Capital Management added2025-11-14+11,226 shares · 2025Q313F
- Two Sigma Investments added2025-11-14+60,462 shares · 2025Q313F
- T. Rowe Price added2025-11-14+542 shares · 2025Q313F
- D.E. Shaw & Co. added2025-11-14+26,043 shares · 2025Q313F
- Renaissance Technologies added2025-11-13+115,900 shares · 2025Q313F
Insider activity
No insider transactions in the last 30 days.
Who moved on this name in 2025Q4
13F transactions reported for the latest quarter, grouped by direction.
New positions1
- Steve Cohen (Point72)+18,725$247K
Added to4
- Izzy Englander (Millennium Mgmt)+97,515$1.3M
- Renaissance Technologies+74,029$976K
- D.E. Shaw & Co.+30,086$397K
- Ken Griffin (Citadel Advisors)+26,335$347K
Trimmed2
- Two Sigma Investments−106,644$1.4M
- AQR Capital Management−26,914$355K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 8 | $17.1M |
| 2022Q2 | 7 | $13.1M |
| 2022Q3 | 8 | $16K |
| 2022Q4 | 9 | $7.5M |
| 2023Q1 | 9 | $8.6M |
| 2023Q2 | 8 | $22.6M |
| 2023Q3 | 7 | $23.3M |
| 2023Q4 | 7 | $25.3M |
| 2024Q1 | 7 | $24.8M |
| 2024Q2 | 7 | $36.8M |
| 2024Q3 | 7 | $17.6M |
| 2024Q4 | 6 | $17.5M |
| 2025Q1 | 8 | $21.9M |
| 2025Q2 | 8 | $23.5M |
| 2025Q3 | 8 | $25.7M |
| 2025Q4 | 11 | $21.5M |
Who owns SPOK
11 super-investors · 2025Q4
Tracked stake
1.64M
shares
Combined value
$22M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added6Trim2Held2
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Renaissance Technologies | 1.25M | $16M |
| 2 | Izzy Englander Millennium Mgmt | 125.8K | $2M |
| 3 | D.E. Shaw & Co. | 70.6K | $932K |
| 4 | Two Sigma Investments | 62.6K | $826K |
| 5 | Ken Griffin Citadel Advisors | 49.7K | $655K |
| 6 | Steve Cohen Point72 | 18.7K | $247K |
| 7 | Ken Griffin Citadel Advisors | 18.6K | $245K |
| 8 | AQR Capital Management | 16.4K | $216K |
| 9 | Jeremy Grantham GMO | 12.3K | $162K |
| 10 | Ken Griffin Citadel Advisors | 12.2K | $161K |
| 11 | T. Rowe Price | 10.7K | $142 |
Recent moves
20 transactions
- +18,725 · 2025Q4
- +26,335 · 2025Q4
- −26,914 · 2025Q4
- +30,086 · 2025Q4
- +97,515 · 2025Q4
- −106,644 · 2025Q4
- +74,029 · 2025Q4
- +542 · 2025Q3
- +26,043 · 2025Q3
- +60,462 · 2025Q3
- −11,435 · 2025Q3
- +11,226 · 2025Q3
- +115,900 · 2025Q3
- +44,939 · 2025Q2
- +14,499 · 2025Q2
- +10,202 · 2025Q2
- +15,590 · 2025Q2
- −8,775 · 2025Q2
- +37,200 · 2025Q2
- +63,830 · 2025Q1
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