Packaging Corp Of America's top three insider shareholders as of September 29, 2026 are Mark W Kowlzan (Chairman Ceo, 473.61K shares), Samuel M Mencoff (Director, 270.19K shares), Thomas A Hassfurther (President, 202.89K shares).
| # | Insider | Position | Direct | Indirect | Total | Share of Insiders | Last Filed |
|---|---|---|---|---|---|---|---|
| 1 | Mark W Kowlzan | Chairman Ceo | 473,610 | 0 | 473,610 | 34.4% | 28 May, 2026 |
| 2 | Samuel M Mencoff | Director | 270,194 | 0 | 270,194 | 19.6% | 13 May, 2026 |
| 3 | Thomas A Hassfurther | President | 202,891 | 0 | 202,891 | 14.7% | 11 Aug, 2026 |
| 4 | Kent A. Pflederer | Evp Cfo | 73,061 | 0 | 73,061 | 5.3% | 31 Mar, 2026 |
| 5 | Charles J. Carter | Evp Mill Ops. | 50,621 | 0 | 50,621 | 3.7% | 31 Mar, 2026 |
| 6 | Pamela A. Barnes | Svp | 44,501 | 0 | 44,501 | 3.2% | 27 Mar, 2024 |
| 7 | Robert P. Mundy | Evp Cfo | 44,408 | 0 | 44,408 | 3.2% | 08 Apr, 2025 |
| 8 | Darla J. Olivier | Svp | 27,397 | 0 | 27,397 | 2.0% | 31 Mar, 2026 |
| 9 | Robert Andrew Schneider | Svp Cio | 24,351 | 0 | 24,351 | 1.8% | 27 Mar, 2024 |
| 10 | Roger B Porter | Director | 22,604 | 0 | 22,604 | 1.6% | 12 May, 2026 |
| 11 | Donald R. Shirley | Exec. Vp | 19,110 | 0 | 19,110 | 1.4% | 24 Aug, 2026 |
| 12 | Jeffrey S Kaser | Svp | 17,398 | 0 | 17,398 | 1.3% | 27 Mar, 2024 |
| 13 | Bruce A Ridley | Svp | 15,618 | 0 | 15,618 | 1.1% | 27 Mar, 2024 |
| 14 | Cheryl K Beebe | Director | 15,104 | 0 | 15,104 | 1.1% | 12 May, 2026 |
| 15 | Robert C Lyons | Director | 13,429 | 0 | 13,429 | 1.0% | 12 May, 2026 |
| 16 | Thomas S Souleles | Director | 11,202 | 0 | 11,202 | 0.8% | 12 May, 2026 |
| 17 | Joseph Vaughn | Svp | 11,167 | 0 | 11,167 | 0.8% | 26 Feb, 2026 |
| 18 | Paul T Stecko | Exec Chairman | 9,492 | 0 | 9,492 | 0.7% | 09 May, 2025 |
| 19 | Thomas P. Maurer | Director | 8,764 | 0 | 8,764 | 0.6% | 10 May, 2024 |
| 20 | Duane C Farrington | Director | 7,243 | 0 | 7,243 | 0.5% | 12 May, 2026 |
| 21 | Heidi L Patton | Svp | 6,479 | 0 | 6,479 | 0.5% | 26 Feb, 2026 |
| 22 | Donna A. Harman | Director | 5,179 | 0 | 5,179 | 0.4% | 12 May, 2026 |
| 23 | Karen E Gowland | Director | 2,118 | 0 | 2,118 | 0.2% | 12 May, 2026 |
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 |
|---|---|---|---|---|---|---|---|---|
| 20 Aug, 2026 | Donald R. Shirley | Exec. Vp | Disposed S | 12,000 | $250.71 | $3.01Mn | 19,110 | Direct |
| 07 Aug, 2026 | Thomas A Hassfurther | President | Disposed S | 7,063 | $254.00 | $1.79Mn | 202,891 | Direct |
| 03 Aug, 2026 | Thomas A Hassfurther | President | Disposed S | 12,531 | $250.00 | $3.13Mn | 218,751 | Direct |
| 05 Aug, 2026 | Thomas A Hassfurther | President | Disposed S | 8,797 | $257.00 | $2.26Mn | 209,954 | Direct |
| 27 May, 2026 | Mark W Kowlzan | Chairman Ceo | Disposed S | 9,266 | $217.08 | $2.01Mn | 473,610 | Direct |
| 12 May, 2026 | Samuel M Mencoff | Director | Acquired A | 591 | $0.00 | $0 | 270,194 | Direct |
| 12 May, 2026 | Karen E Gowland | Director | Acquired A | 591 | $0.00 | $0 | 2,118 | Direct |
| 12 May, 2026 | Duane C Farrington | Director | Acquired A | 591 | $0.00 | $0 | 7,243 | Direct |
| 12 May, 2026 | Thomas S Souleles | Director | Acquired A | 591 | $0.00 | $0 | 11,202 | Direct |
| 12 May, 2026 | Cheryl K Beebe | Director | Acquired A | 591 | $0.00 | $0 | 15,104 | Direct |
| 12 May, 2026 | Donna A. Harman | Director | Acquired A | 591 | $0.00 | $0 | 5,179 | Direct |
| 12 May, 2026 | Robert C Lyons | Director | Acquired A | 591 | $0.00 | $0 | 13,429 | Direct |
| 12 May, 2026 | Roger B Porter | Director | Acquired A | 591 | $0.00 | $0 | 22,604 | Direct |
| 27 Mar, 2026 | Kent A. Pflederer | Evp Cfo | Acquired A | 5,596 | $0.00 | $0 | 75,303 | Direct |
| 27 Mar, 2026 | Charles J. Carter | Evp Mill Ops. | Acquired A | 8,282 | $0.00 | $0 | 53,496 | Direct |
| 27 Mar, 2026 | Donald R. Shirley | Exec. Vp | Acquired A | 6,254 | $0.00 | $0 | 33,282 | Direct |
| 27 Mar, 2026 | Mark W Kowlzan | Chairman Ceo | Acquired A | 43,010 | $0.00 | $0 | 500,097 | Direct |
| 27 Mar, 2026 | Thomas A Hassfurther | President | Acquired A | 29,778 | $0.00 | $0 | 241,618 | Direct |
| 27 Mar, 2026 | Darla J. Olivier | Svp | Acquired A | 2,260 | $0.00 | $0 | 28,279 | Direct |
| 27 Mar, 2026 | Mark W Kowlzan | Chairman Ceo | Acquired A | 3,292 | $0.00 | $0 | 503,389 | Direct |