Shareholder Vote

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 2, 2023     Packaging Corporation of America (Exact name of registrant as specified in its charter)       Delaware   1-15399   36-4277050 (State or other jurisdiction of incorporation)   (Commission File Number)   (IRS Employer 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 Symbol(s)   Name of each exchange on which registered Common Stock   PKG   New York Stock Exchange       Item 5.07. Submission of Matters to a Vote of Security Holders On May 2, 2023, Packaging Corporation of America (“PCA”) held its 2023 Annual Meeting of Stockholders, at which the following proposals were voted upon and approved by PCA’s stockholders: (a) Election of Directors . Voting results are summarized as follows:   Nominee    Votes For      Votes Against      Abstentions      Broker Non-Vote   Cheryl K. Beebe      66,786,534        9,598,850        57,755        4,374,117   Duane C. Farrington      75,883,582        499,191        60,366        4,374,117   Donna A. Harman      75,867,680        519,226        56,233        4,374,117   Mark W. Kowlzan      68,696,382        7,687,193        59,564        4,374,117   Robert C. Lyons      73,344,365        3,036,959        61,815        4,374,117   Thomas P. Maurer      75,871,098        512,332        59,709        4,374,117   Samuel M. Mencoff      63,587,134        12,797,627        58,378        4,374,117   Roger B. Porter      59,938,932        16,443,299        60,908        4,374,117   Thomas S. Souleles      70,197,222        6,184,622        61,295        4,374,117   Paul T. Stecko      71,064,025        5,324,168        54,946        4,374,117   (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: 79,104,653 votes for, 1,660,315 votes against, and 52,288 abstentions. (c)     Approval of PCA’s Executive Compensation . 72,343,447 votes for, 3,968,815 votes against, 130,878 abstentions and 4,374,117 broker non-votes. (d)      Frequency of Vote on Executive Compensation. 74,831,036 for one year; 78,781 for two years; 1,436,641 for three years, 96,681 abstentions; and 4,374,117 broker non-votes. PCA will continue to hold votes on its executive compensation every year until the next time stockholders vote on the frequency of the vote on executive compensation. 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 By:   /s/ Kent A. Pflederer   Senior Vice President, General Counsel & Secretary Date: May 4, 2023