☒Quarterly Report pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934For the quarterly period ended December 27, 2025or Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a small reporting company oremerging growth company. See the definitions of “large accelerated filer”, “accelerated filer”, “smaller reporting company” and “emerging growth Large Accelerated Filer☐Accelerated filer☒Non-accelerated filer☐Smaller reporting company☐Emerging growth companyIf an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complyingwith any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. CAUTIONARY STATEMENT CONCERNING FORWARD-LOOKING STATEMENTS This document contains certain statements that are “forward-looking” statements within the meaning of the federal securities laws and are presentedpursuant to the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995.Such “forward-looking” statements include, butare not limited to, statements with respect to our future financial performance and condition, results of operations and business, our expectations orbeliefs concerning future events, plans, objectives, expectations and intentions, and other statements that are not historical facts. These statementsmay contain words such as “believes,” “expects,” “may,” “will,” “should,” “would,” “could,” “seeks,” “approximately,” “intends,” “plans,”“estimates,” “projects,” “outlook,” “guidance,” “anticipates” or “looking forward” or similar expressions.In addition, we, through our seniormanagement, from time to time make forward-looking public statements concerning our expected future operations and performance and otherdevelopments. These forward-looking statements are based upon the current beliefs and expectations of the management of Magnera and are subjectto risks and uncertainties that may change at any time.Forward-looking statements involve risks and uncertainties that could cause actual results todiffer materially from those in the forward-looking statements. Although it is not possible to identify all of these risks and uncertainties, they include,among others, the following: global economic conditions; inflation; the cost and availability of raw materials and energy; disruption of our supplychain; the adverse impact of weather events on our facilities, inventory and suppliers, as well as adverse effects on our customers, suppliers and otherbusiness partners; the effect of competition on our business; our inability to integrate future acquired companies or to realized expected operating Part I – Financial Information Item 1 – Financial Statements Magnera CorporationConsolidated and Combined Statements of Operations Net salesCosts and expenses:Cost of goods soldSelling, general and administrativeAmortization of intangiblesRestructuring and other activitiesOperating income (loss)Other expense, netInterest expense, netLoss before income taxesIncome tax expense (benefit)Net loss (Unaudited) (in millions of dollars) Net lossOther comprehensive income, net of tax:Currency translation gain (loss) Magnera CorporationConsolidated Balance Sheets (in millions of dollars) Assets Current assets:Cash and cash equivalentsAccounts receivableFinished goodsRaw materials Liabilities and equity Current liabilities:Accounts payableAccrued employee costsOther current liabilitiesTotal current liabilitiesNoncurrent liabilities: Equity:Common stock (35.9 and 35.6 million shares issued, respectively) Magnera CorporationCondensed Consolidated and Combined Statements of Cash Flows (in millions of dollars) Cash Flows from Operating Activities:Net lossAdjustments to reconcile net cash from operating activities:DepreciationAmortization of intangiblesNon-cash interest expenseDeferred income taxShare-based compensation expenseOther non-cash operating activities, netChanges in working capital, netChanges in other assets and liabilitiesNet cash from (used in) operating activities Cash Flows from Investing Activities:Additions to property, plant and equipmentCash acquired from mergerNet cash from (used in) investing activities Cash Flows from Financing Activities: Proceeds from long-term borrowingsRepayments o