# EDGAR Filing Document

**Accession Number:** 0000075677
**File Stem:** 0001193125-26-221672
**Filing Date:** 2026-5
**Character Count:** 5298
**Document Hash:** 3717ea1e211bec7f06c411d63af1bac4
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-221672.hdr.sgml**: 20260513

**ACCESSION NUMBER**: 0001193125-26-221672

**CONFORMED SUBMISSION TYPE**: 8-K

**PUBLIC DOCUMENT COUNT**: 11

**CONFORMED PERIOD OF REPORT**: 20260512

**ITEM INFORMATION**: Submission of Matters to a Vote of Security Holders

**FILED AS OF DATE**: 20260513

**DATE AS OF CHANGE**: 20260513

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PACKAGING CORP OF AMERICA
- **CENTRAL INDEX KEY:** 0000075677
- **STANDARD INDUSTRIAL CLASSIFICATION:** PAPERBOARD CONTAINERS & BOXES [2650]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 364277050
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 8-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-15399
- **FILM NUMBER:** 26973517

**BUSINESS ADDRESS:**
- **STREET 1:** 1 NORTH FIELD CT
- **CITY:** LAKE FOREST
- **STATE:** IL
- **ZIP:** 60045
- **BUSINESS PHONE:** 8474823000

**MAIL ADDRESS:**
- **STREET 1:** 1 NORTH FIELD CT
- **CITY:** LAKE FOREST
- **STATE:** IL
- **ZIP:** 60045

?xml version='1.0' encoding='ASCII'? 8-K

### UNITED STATES

### SECURITIES AND EXCHANGE COMMISSION

#### WASHINGTON, DC 20549

### FORM 8-K

#### CURRENT REPORT

#### Pursuant to Section 13 or 15(d)

#### of the Securities Exchange Act of 1934

#### Date of report (Date of earliest event reported): May 12, 2026

## Packaging Corporation of America

#### (Exact name of registrant as specified in its charter)

---

| | | |
|:---|:---|:---|
| **Delaware** | **1-15399** | **36-4277050** |
| **(State or other jurisdiction**<br> **of incorporation)** | **(Commission**<br> **File Number)** | **(IRS Employer<br>Identification No.)** |

---

#### 1 N. Field Court, Lake Forest, Illinois 60045

#### (Address of Principal Executive Offices, including Zip Code)
(847) 482-3000

#### (Registrant's Telephone Number, Including Area Code)
Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrants under any of the following provisions:

☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐ Pre-commencement communications pursuant to Rule 14d-2 (b) under the Exchange Act (17 CFR 240.14d-2 (b))

☐ Pre-commencement communications pursuant to Rule 13e-4 (c) under the Exchange Act (17 CFR 240.13e-4 (c))

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§ 230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§ 240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Securities registered pursuant to Section 12(b) of the Exchange Act:

---

| | | |
|:---|:---|:---|
| **Title of each class** | **Trading**<br> **Symbol(s)** | **Name of each exchange**<br> **on which registered** |
| Common Stock | PKG | New York Stock Exchange |

---

------

---

| | |
|:---|:---|
| **Item 5.07.** | **Submission of Matters to a Vote of Security Holders**  |

---

On May 12, 2026, Packaging Corporation of America ("PCA") held its 2026 Annual Meeting of Stockholders, at which the following proposals were voted upon and approved by PCA's stockholders:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(a) *Election of Directors*. Voting results are summarized as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Nominee** | **Votes For** | **Votes Against** | **Abstentions** | **Broker<br>Non-Vote** |
|  Cheryl K. Beebe | 74535448 | 5009056 | 41399 | 3975507 |
|  Duane C. Farrington | 78947264 | 561789 | 76850 | 3975507 |
|  Karen E. Gowland | 78119832 | 1370588 | 95483 | 3975507 |
|  Donna A. Harman | 78940200 | 572065 | 73638 | 3975507 |
|  Mark W. Kowlzan | 77154503 | 2387938 | 43462 | 3975507 |
|  Robert C. Lyons | 78012659 | 1494605 | 78639 | 3975507 |
|  Samuel M. Mencoff | 67878835 | 8681658 | 3025410 | 3975507 |
|  Roger B. Porter | 64678389 | 11849812 | 3057702 | 3975507 |
|  Thomas S. Souleles | 75213947 | 4291228 | 80728 | 3975507 |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(b) *Ratification of Independent Registered Public Accounting Firm*. The audit committee's appointment of KPMG LLP as PCA's independent registered public accounting firm was ratified by the following vote: 82,796,126 votes for, 744,560 votes against, and 20,724 abstentions.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(c) *Approval of PCA's Executive Compensation*: 76,265,206 votes for, 2,299,022 votes against, 1,021,675 abstentions and 3,975,507 broker non-votes.

------

#### SIGNATURES
Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

---

| | |
|:---|:---|
| PACKAGING CORPORATION OF AMERICA | PACKAGING CORPORATION OF AMERICA |
| By: | /s/ S. Ellis Cunningham |
|  | Vice President and General Counsel |

---

Date: May 13, 2026