As of September 09, 2026, the three largest insider holders of PRK are Dan Delawder (Chairman Of The Board, 60.35K shares), Leon Zazworsky (Director, 49.58K shares), David L Trautman (Chairman Of The Board, 48.07K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Dan Delawder | Chairman Of The Board | 60,346 | 0 | 60,346 | 22.1% | 29 Oct, 2025 |
| 2 | Leon Zazworsky | Director | 49,575 | 0 | 49,575 | 18.2% | 29 Oct, 2025 |
| 3 | David L Trautman | Chairman Of The Board | 48,066 | 0 | 48,066 | 17.6% | 13 Apr, 2026 |
| 4 | Jeff Agee | Director | 7,780 | 20,406 | 28,186 | 10.3% | 03 Feb, 2026 |
| 5 | Robert E Oneill | Director | 13,422 | 0 | 13,422 | 4.9% | 29 Oct, 2025 |
| 6 | Brady T Burt | Chief Financial Officer | 12,602 | 0 | 12,602 | 4.6% | 13 Apr, 2026 |
| 7 | Matthew R Miller | President Ceo | 11,546 | 0 | 11,546 | 4.2% | 13 Apr, 2026 |
| 8 | Donna M Alvarado | Director | 9,214 | 0 | 9,214 | 3.4% | 29 Oct, 2025 |
| 9 | F W Iv Englefield | Director | 8,985 | 0 | 8,985 | 3.3% | 29 Oct, 2025 |
| 10 | Stephen J. Kambeitz | Director | 5,524 | 0 | 5,524 | 2.0% | 30 Oct, 2024 |
| 11 | Mark R Ramser | Director | 5,179 | 0 | 5,179 | 1.9% | 30 Oct, 2024 |
| 12 | Timothy S. Mclain | Director | 5,091 | 0 | 5,091 | 1.9% | 29 Oct, 2025 |
| 13 | Daniel Byrd Iii Miller | Director | 3,455 | 0 | 3,455 | 1.3% | 29 Oct, 2025 |
| 14 | Alicia J Hupp | Director | 3,423 | 0 | 3,423 | 1.3% | 25 Oct, 2022 |
| 15 | Jason N Judd | Director | 2,681 | 0 | 2,681 | 1.0% | 29 Oct, 2025 |
| 16 | Kelly A Herreman | Chief Accounting Officer | 2,318 | 0 | 2,318 | 0.8% | 02 Apr, 2026 |
| 17 | Frederic M Bertley | Director | 1,794 | 0 | 1,794 | 0.7% | 29 Oct, 2025 |
| 18 | Karen Morrison | Director | 936 | 0 | 936 | 0.3% | 29 Oct, 2025 |
| 19 | Kelly K Gratz | Director | 609 | 0 | 609 | 0.2% | 29 Oct, 2025 |
Each row is that insider’s most recently reported position, from Form 4 filings over the last 60 months — which is why this total does not tie to the quarterly series above, where a quarter counts only the insiders who filed in it. Shares held through a fund or institutional portfolio are counted on the institutional ownership page instead.
| Date | Insider | Position | Transaction | Shares | Price | Value | Shares Held After | Ownership |
|---|---|---|---|---|---|---|---|---|
| 31 Mar, 2026 | Brady T Burt | Chief Financial Officer | Acquired A | 1,073 | — | — | 12,445 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Acquired A | 2,213 | — | — | 48,095 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Acquired A | 2,213 | — | — | 48,095 | Direct |
| 31 Mar, 2026 | Matthew R Miller | President Ceo | Acquired A | 1,523 | — | — | 11,496 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Acquired A | 2,213 | — | — | 48,095 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Disposed F | 986 | $163.45 | $161.10K | 47,109 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Disposed F | 986 | $163.45 | $161.10K | 47,109 | Direct |
| 31 Mar, 2026 | Matthew R Miller | President Ceo | Disposed F | 671 | $163.45 | $109.71K | 10,825 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Disposed F | 986 | $163.45 | $161.10K | 47,109 | Direct |
| 31 Mar, 2026 | Brady T Burt | Chief Financial Officer | Disposed F | 474 | $163.45 | $77.44K | 11,971 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Acquired M | 1,718 | — | — | 48,827 | Direct |
| 31 Mar, 2026 | Matthew R Miller | President Ceo | Acquired M | 1,283 | — | — | 12,108 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Acquired M | 1,718 | — | — | 48,827 | Direct |
| 31 Mar, 2026 | Brady T Burt | Chief Financial Officer | Acquired M | 1,133 | — | — | 13,103 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Acquired M | 1,718 | — | — | 48,827 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Disposed F | 761 | $163.45 | $124.31K | 48,066 | Direct |
| 31 Mar, 2026 | Brady T Burt | Chief Financial Officer | Disposed F | 502 | $163.45 | $81.98K | 12,602 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Disposed F | 761 | $163.45 | $124.31K | 48,066 | Direct |
| 31 Mar, 2026 | David L Trautman | Chairman Of The Board | Disposed F | 761 | $163.45 | $124.31K | 48,066 | Direct |
| 31 Mar, 2026 | Matthew R Miller | President Ceo | Disposed F | 562 | $163.45 | $91.86K | 11,546 | Direct |