Ticker · CUSIP 74291D104
Holders (tracked)
7
Combined shares
3,647,734
Combined value
$8.17M
Last close
—
Quarter
2025Q4
Tracked holders · last 8 quarters
+1 vs previous quarter over the last 2.
SEC event timeline
8 events
- Ken Griffin (Citadel Advisors) added2026-02-17+27,008 shares · 2025Q413F
- Two Sigma Investments added2026-02-17+366,227 shares · 2025Q413F
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−121,842 shares · 2025Q413F
- Steve Cohen (Point72) opened position2026-02-17+17,087 shares · 2025Q413F
- Renaissance Technologies added2026-02-12+763,705 shares · 2025Q413F
- +1,956,378 shares · 2025Q313F
- Two Sigma Investments opened position2025-11-14+99,282 shares · 2025Q313F
- Renaissance Technologies opened position2025-11-13+132,000 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)+17,087$38K
Added to3
- Renaissance Technologies+763,705$1.7M
- Two Sigma Investments+366,227$820K
- Ken Griffin (Citadel Advisors)+27,008$60K
Trimmed1
- Izzy Englander (Millennium Mgmt)−121,842$273K
Exited0
—
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2025Q3 | 6 | $6.4M |
| 2025Q4 | 7 | $8.2M |
Who owns PROK
7 super-investors · 2025Q4
Tracked stake
3.65M
shares
Combined value
$8M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added5Trim1
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Izzy Englander Millennium Mgmt | 1.83M | $4M |
| 2 | Renaissance Technologies | 895.7K | $2M |
| 3 | Two Sigma Investments | 465.5K | $1M |
| 4 | Ken Griffin Citadel Advisors | 371.8K | $833K |
| 5 | Ken Griffin Citadel Advisors | 47.6K | $107K |
| 6 | Steve Cohen Point72 | 17.1K | $38K |
| 7 | Ken Griffin Citadel Advisors | 15.5K | $35K |
Recent moves
8 transactions
- +27,008 · 2025Q4
- +366,227 · 2025Q4
- −121,842 · 2025Q4
- +17,087 · 2025Q4
- +763,705 · 2025Q4
- +1,956,378 · 2025Q3
- +99,282 · 2025Q3
- +132,000 · 2025Q3
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