Results of Operations

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 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): November 19, 2025   Magnera Corporation (Exact name of registrant as specified in its charter)   Pennsylvania   001-03560   23-0628360 (State or other jurisdiction of incorporation)   (Commission File Number)   (I.R.S. Employer Identification No.)           9335 Harris Corners Pkwy , Ste 300 , Charlotte , North Carolina   28269 (Address of principal executive offices)   (Zip Code) Registrant’s telephone number, including area code: 866 744-7380   (N/A) Former name or former address, if changed since last report   Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant 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))   Securities registered pursuant to Section 12(b) of the Act:   Title of each class   Trading Symbol(s)   Name of each exchange on which registered Common Stock   MAGN   New York Stock Exchange   Indicate by check mark whether the registrant is an emerging growth company in 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.  ☐   Item 2.02 Results of Operations and Financial Condition.   On November 19, 2025, the Company reported its results of operations for the year ended September 27, 2025. A copy of the press release issued by the Company is furnished herewith as Exhibit 99.1. Item 9.01 Financial Statements and Exhibits.   d) Exhibits.   99.1 Press release issued November 19, 2025. 104 Cover Page Interactive Data File (embedded within the Inline XBRL document).   The information furnished in this Current Report on Form 8-K and Exhibit 99.1 attached hereto shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as shall be expressly set forth by specific reference in such filing. 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.     Magnera Corporation       November 19, 2025 By: /s/ James M. Till     James M. Till     Chief Financial Officer