FORM 10-Q (Mark One)☒QUARTERLY REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March31, 2026. or ☐TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-36102 Knowles Corporation (Exact name of registrant as specified in its charter)Delaware90-1002689(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.) 1151 Maplewood Drive, Itasca, IL(Address of Principal Executive Offices) 60143(Zip Code) (630) 250-5100(Registrant’s telephone number, including area code) Name of each exchange on whichregistered New York Stock Exchange Indicate by check mark whether the registrant: (1) has filed all reports required to be filed by Section 13 or 15(d) of the SecuritiesExchange Act of 1934 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 filing requirements for the past 90 days.Yes☑No☐ Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submittedpursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that theregistrant was required to submit such files).Yes☑No☐ Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smallerreporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smallerreporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act. Accelerated filerSmaller reporting companyEmerging growth company Large accelerated filerNon-accelerated filer If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period forcomplying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.☐ Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).Yes☐No☑ The number of shares outstanding of the registrant’s common stock as of April24, 2026 was 85,560,660. Knowles CorporationForm 10-QTable of Contents Item 1.Financial StatementsConsolidated Statements of Earnings (unaudited) for the three months ended March 31, 2026 and 2025Consolidated Statements of Comprehensive Earnings (unaudited) for the three months ended March 31,2026 and 2025Consolidated Balance Sheets (unaudited) at March 31, 2026 and December 31, 2025Consolidated Statements of Stockholders' Equity (unaudited) for the three months ended March 31, 2026and 2025Consolidated Statements of Cash Flows (unaudited) for the three months ended March 31, 2026 and2025Notes to Consolidated Financial Statements (unaudited) Forward-Looking StatementsItem 2.Management’s Discussion and Analysis of Financial Condition and Results of OperationsItem 3.Quantitative and Qualitative Disclosures About Market RiskItem 4.Controls and Procedures Item 1.Legal ProceedingsItem 1A.Risk FactorsItem 2.Unregistered Sales of Equity Securities and Use of ProceedsItem 5.Other InformationItem 6.ExhibitsSIGNATURES PART I — FINANCIAL INFORMATION KNOWLES CORPORATIONCONSOLIDATED STATEMENTS OF EARNINGS(in millions, except per share amounts)(unaudited) KNOWLES CORPORATIONCONSOLIDATED STATEMENTS OF COMPREHENSIVE EARNINGS(in millions)(unaudited) NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(unaudited) 1. Basis of Presentation Background- Knowles Corporation (NYSE:KN) is a leading manufacturer of specialty electronic components. The Company designsparts that perform unique and critical functions for innovative technologies. Through extreme reliability, custom engineering, andscalable manufacturing, the Company enables businesses to succeed in the most demanding applications across medtech, defense,industrial, and electrification markets. Knowles high performance capacitors, radio frequency ("RF") filters, advanced medtechmicrophones, and balanced armature speakers enhance the performance of customer products. The Company's focus on the customer,combined with unique technology, proprietary manufacturing techniques, and global operational expertise, enable the Company todeliver innovative solutions across multiple applications. References to "Knowles," "the Company," "we," "our," and "us" refer toKnowles Corporation and its consolidated subsidiaries. Financial Statement Presentation -The accompanying unaudited interim Consolidated Financial Statements have been preparedpursuant to the rules and regulations of the Securities and Exchange Commission ("SEC") for quarterly reports on Form 10-Q and donot include all of the information and note disclosures required by U.S. generally accepted accounting principles (“GAAP” or “U.S.GAAP”) for comple