Ticker · CUSIP 700658107
Holders (tracked)
6
Combined shares
124,610
Combined value
$18.96M
Last close
$175.33
Quarter
2025Q4
Price · 1Y$175.33+36.36 (+26.17%)H $175.80 · L $137.33 · Avg Vol 67K
Tracked holders · last 8 quarters
-1 vs previous quarter over the last 8.
Price is +15.2% vs the avg quarter-end implied price across tracked holders.
SEC event timeline
15 events
- Ken Griffin (Citadel Advisors) trimmed2026-02-17−6,478 shares · 2025Q4Position
- D.E. Shaw & Co. added2026-02-17+955 shares · 2025Q4Position
- Izzy Englander (Millennium Mgmt) trimmed2026-02-17−2,153 shares · 2025Q4Position
- T. Rowe Price trimmed2026-02-17−818 shares · 2025Q4Position
- +49,267 shares · 2025Q4Position
- AQR Capital Management added2026-02-17+3,545 shares · 2025Q4Position
- Two Sigma Investments exited2026-02-17−11,467 shares · 2025Q4Position
- Renaissance Technologies exited2026-02-12−19,305 shares · 2025Q4Position
- −21,350 shares · 2025Q3Position
- Two Sigma Investments added2025-11-14+9,009 shares · 2025Q3Position
- D.E. Shaw & Co. trimmed2025-11-14−4,264 shares · 2025Q3Position
- T. Rowe Price added2025-11-14+1,022 shares · 2025Q3Position
- AQR Capital Management added2025-11-14+2,737 shares · 2025Q3Position
- +9,235 shares · 2025Q3Position
- Renaissance Technologies opened position2025-11-13+19,305 shares · 2025Q3Position
Insider activity
No insider transactions in the last 30 days.
Follow-the-investor returns
If you'd copied each holder of PRK…
Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.
| Investor | First in | Cost basis | Return | Position value today |
|---|---|---|---|---|
| T. Rowe Price | 2016Q1 | $111.15 | +57.7% | $3.0M |
| D.E. Shaw & Co. | 2016Q4 | $150.45 | +16.5% | $2.9M |
| AQR Capital Management | 2016Q1 | $150.65 | +16.4% | $2.2M |
| Ken Griffin (Citadel Advisors) | 2016Q1 | $150.84 | +16.2% | $3.9M |
| Paul Tudor Jones (Tudor Investment) | 2016Q4 | $153.18 | +14.5% | $8.6M |
| Izzy Englander (Millennium Mgmt) | 2016Q3 | $153.85 | +14.0% | $1.2M |
Who moved on this name in 2025Q4
Position changes reported for the latest quarter, grouped by direction.
New positions1
- Paul Tudor Jones (Tudor Investment)+49,267$7.5M
Added to2
- AQR Capital Management+3,545$539K
- D.E. Shaw & Co.+955$145K
Trimmed3
- Ken Griffin (Citadel Advisors)−6,478$986K
- Izzy Englander (Millennium Mgmt)−2,153$328K
- T. Rowe Price−818$124
Exited2
- Renaissance Technologies−19,305$3.1M
- Two Sigma Investments−11,467$1.9M
Institutional ownership over time
Distinct super-investors holding this ticker · combined dollar value, by quarter.
| Quarter | Holders | Combined value |
|---|---|---|
| 2022Q1 | 4 | $301.6M |
| 2022Q2 | 4 | $281.8M |
| 2022Q3 | 7 | $290.0M |
| 2022Q4 | 5 | $333.5M |
| 2023Q1 | 4 | $280.9M |
| 2023Q2 | 7 | $235.0M |
| 2023Q3 | 9 | $213.7M |
| 2023Q4 | 5 | $307.1M |
| 2024Q1 | 4 | $305.9M |
| 2024Q2 | 3 | $318.8M |
| 2024Q3 | 5 | $9.1M |
| 2024Q4 | 4 | $6.9M |
| 2025Q1 | 8 | $16.2M |
| 2025Q2 | 6 | $15.4M |
| 2025Q3 | 7 | $18.1M |
| 2025Q4 | 6 | $19.0M |
Who owns PRK
6 super-investors · 2025Q4
Tracked stake
124.6K
shares
Combined value
$19M
% of shares outstanding
—
shares-out unknown
Quarter action mix
New1Added2Trim3
| # | Manager | Shares | Value |
|---|---|---|---|
| 1 | Paul Tudor Jones Tudor Investment | 49.3K | $7M |
| 2 | Ken Griffin Citadel Advisors | 22.2K | $3M |
| 3 | T. Rowe Price | 17.3K | $3M |
| 4 | D.E. Shaw & Co. | 16.3K | $2M |
| 5 | AQR Capital Management | 12.5K | $2M |
| 6 | Izzy Englander Millennium Mgmt | 7.1K | $1M |
Recent moves
20 transactions
- −11,467 · 2025Q4
- +49,267 · 2025Q4
- +3,545 · 2025Q4
- TRIMT. Rowe Price−818 · 2025Q4
- −2,153 · 2025Q4
- −6,478 · 2025Q4
- +955 · 2025Q4
- −19,305 · 2025Q4
- −21,350 · 2025Q3
- +9,009 · 2025Q3
- +9,235 · 2025Q3
- +1,022 · 2025Q3
- +2,737 · 2025Q3
- TRIMD.E. Shaw & Co.−4,264 · 2025Q3
- +19,305 · 2025Q3
- −13,219 · 2025Q2
- −2,200 · 2025Q2
- −22,642 · 2025Q2
- +6,523 · 2025Q2
- +990 · 2025Q2
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