Samuel M. Mencoff - 12 May 2026 Form 4 Insider Report for PACKAGING CORP OF AMERICA (PKG)

Reporting relationship: Director
Issuer ticker: PKG
Reported as of: 12 May 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 13 May 2026, 15:02:32 UTC
Prior SEC filing: 09 May 2025
Source filing: View source filing
Reporting owner signature: Kent A. Pflederer, attorney in fact

Key filing fact

Samuel M. Mencoff filed Form 4 for PACKAGING CORP OF AMERICA (PKG) on 13 May 2026.

Key facts

This page summarizes Samuel M. Mencoff's Form 4 filing for PACKAGING CORP OF AMERICA (PKG).
1 reported transaction and 0 derivative rows are listed below.
Accepted by SEC: 13 May 2026, 15:02.

Change

Previous filing in this sequence was filed on 09 May 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001219630 Primary reporting owner

MENCOFF SAMUEL M

Relationship: Director
Address: THREE FIRST NATIONAL PLAZA, CHICAGO
Signature: Kent A. Pflederer, attorney in fact
Signature date: 13 May 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

PKG transaction

Common Stock

Award

Transaction value
Shares: +591
Change %: +0.22%
Price: $0.000000^*
Shares after: 270,194
Date: 12 May 2026
Ownership: Direct
Footnotes: F1, F2

PKG holding

Common Stock

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 75,526
Date: 12 May 2026
Ownership: Through family limited partnership
Footnotes: F3, F4

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 4 footnotes

Footnote F1

Share award for equity portion of directors fees.

Footnote F2

The beginning share balance increased from the previously reported amount due to reinvestment of dividends in transactions exempt from reporting pursuant to Rule 16a-11 under the Securities Exchange Act of 1934.

Footnote F3

The share balance increased from the previously reported amount due to reinvestment of dividends in transactions exempt from reporting pursuant to Rule 16a-11 under the Securities Exchange Act of 1934.

Footnote F4

Held by Temple Hall Partners, LP, a family limited partnership. Reporting person disclaims beneficial interest of such shares except to the extent of his pecuniary interest therein.