KN / Knowles Corporation - Pengajuan SECLaporan Tahunan, Pernyataan Proksi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 June 30, 2025. 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: 0

Knowles Reports Q2 2025 Financial Results and Provides Outlook for Q3 2025 Second Quarter Revenues from Continuing Operations Increased 8% on a Year over Year Basis to $146 Million, Exceeding the High-End of the Guided Range Net Cash from Operations

Exhibit 99.1 Financial Contact: Sarah Cook Knowles Investor Relations Email: [email protected] Knowles Reports Q2 2025 Financial Results and Provides Outlook for Q3 2025 Second Quarter Revenues from Continuing Operations Increased 8% on a Year over Year Basis to $146 Million, Exceeding the High-End of the Guided Range Net Cash from Operations of $36 Million; Exceeding the High-End of t

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): July 24, 2025 Knowles Corporation

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): July 24, 2025 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

0 7 . 2 4 . 2 5 Earnings Release Supplemental Information 2nd Quarter 2025 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Se

0 7 . 2 4 . 2 5 Earnings Release Supplemental Information 2nd Quarter 2025 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued busi

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 1511 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices) 60

Conflict Minerals Report for the calendar year ended December 31, 202

1 Exhibit 1.01 Conflict Minerals Report Knowles Corporation has included this Conflict Minerals Report as an exhibit to its Form SD for 2024 as provided for in Rule 13p-1 under the Securities Exchange Act of 1934, as amended, and Form SD (collectively, the “Conflict Minerals Rule”). The date of filing of this Conflict Minerals Report is May 21, 2025. Information presented in this report is based o

M A Y 1 3 , 20 25 Investor Day 2025 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995,

M A Y 1 3 , 20 25 Investor Day 2025 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business 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): May 13, 2025 Knowles Corporation

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): May 13, 2025 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File N

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): April 29, 2025 Knowles Corporatio

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): April 29, 2025 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

As filed with the Securities and Exchange Commission on April 30, 2025 Registration No. 333-194262 UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 POST-EFFECTIVE AMENDMENT NO. 1 TO FORM S-8 REGISTRATION STATEMENT NO. 333-19426

As filed with the Securities and Exchange Commission on April 30, 2025 Registration No.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 15 CERTIFICATION AND NOTICE OF TERMINATION OF REGISTRATION UNDER SECTION 12(g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR SUSPENSION OF DUTY TO FILE REPORTS UNDER SECTIONS 13 AND 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934. Commission File Number: 001-36102 Knowles Corporation (Exact name of registrant as specified in its

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 March 31, 2025. 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:

0 4 . 2 4 . 2 5 Earnings Release Supplemental Information 1st Quarter 2025 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Se

0 4 . 2 4 . 2 5 Earnings Release Supplemental Information 1st Quarter 2025 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued busi

Knowles Reports Q1 2025 Financial Results and Provides Outlook for Q2 2025 First Quarter Revenues from Continuing Operations of $132M, at High-End of the Guided Range Net Cash from Operations Exceeded the High-End of the Guided Range Q2 Revenues are

Exhibit 99.1 Financial Contact: Sarah Cook Knowles Investor Relations Email: [email protected] Knowles Reports Q1 2025 Financial Results and Provides Outlook for Q2 2025 First Quarter Revenues from Continuing Operations of $132M, at High-End of the Guided Range Net Cash from Operations Exceeded the High-End of the Guided Range Q2 Revenues are Expected to be up 4% Year over Year ITASCA,

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 24, 2025 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): February 18, 2025 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

Special Performance Award Agreement, dated February 18, 2025, between Knowles Corporation and Jeffrey Niew

Special Performance Award Agreement This Special Performance Award Agreement (this “Agreement”) between Knowles Corporation, a Delaware corporation (the “Company”), and Jeffrey S.

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 13, 2025 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024. 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 Corpo

Knowles Reports Q4 & Full Year 2024 Financial Results and Provides Outlook for Q1 2025 Fourth Quarter Revenues from Continuing Operations increased 2% and Full Year Revenues from Continuing Operations increased 21% on a year over year basis Generated

Exhibit 99.1 Financial Contact: Sarah Cook Knowles Investor Relations Email: [email protected] Knowles Reports Q4 & Full Year 2024 Financial Results and Provides Outlook for Q1 2025 Fourth Quarter Revenues from Continuing Operations increased 2% and Full Year Revenues from Continuing Operations increased 21% on a year over year basis Generated Fourth Quarter Net Cash from Operations of

1 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future

1 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

Knowles Corporation Policy on Recoupment of Incentive Compensation

1 KNOWLES CORPORATION POLICY ON RECOUPMENT OF INCENTIVE COMPENSATION Except as provided in this policy, the Compensation Committee of the Board of Directors (the "Committee") of Knowles Corporation (the "Company") shall, to the extent legally permitted, require the return, repayment or forfeiture of any performance-based cash or equity incentive compensation payment or award ("Covered Compensation

Insider Trading and Confidentiality Policy

1 KNOWLES CORPORATION INSIDER TRADING AND CONFIDENTIALITY POLICY (Last revised February 7, 2023) During the course of your service at Knowles Corporation (together with its direct and indirect subsidiaries, “Knowles” or the “Company”), you may become aware of “material nonpublic information.

Subsidiaries of Knowles Corporation

Exhibit 21.1 List of Subsidiaries Company Name Where Incorporated Domestic CD Snow Hill, LLC Delaware Cornell Dublier Property Corp. South Carolina Cornell Dubilier, LLC Delaware Cornell-Dubilier Acquisition Corp. Delaware Cornell-Dubilier Marketing, Inc. Delaware Illinois Capacitor International, Inc. Illinois Illinois Capacitor, Inc. Illinois Integrated Microwave Corporation California Knowles C

KNOWLES CORPORATION UNAUDITED CONDENSED PRO FORMA CONSOLIDATED BALANCE SHEET (in millions, except share and per share amounts)

Exhibit 99.2 On December 27, 2024, the Company completed the previously announced disposition of the Consumer MEMS Microphones ("CMM") segment to Syntiant Corp. for $150.0 million in total consideration, consisting of $70.0 million in cash and $80.0 million in series D-2 preferred stock of Syntiant. The Company will also share in certain separation costs pursuant to a credit for up to $13.5 millio

1 Knowles Corporation Completes the Sale of its Consumer MEMS Microphone Business to Syntiant ITASCA, Ill., December 30, 2024 - Knowles Corporation (NYSE: KN) ("Knowles" or the "Company"), a leading manufacturer of specialty electronic components for

1 Knowles Corporation Completes the Sale of its Consumer MEMS Microphone Business to Syntiant ITASCA, Ill.

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Completion of Acquisition or Disposition of Assets

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): December 27, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): December 6, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

For immediate release Financial Contact: Sarah Cook Knowles Investor Relations Email: [email protected] Knowles Appoints Laura Angelini to its Board of Directors ITASCA, Ill., December 9, 2024 — Knowles Corporation (NYSE: KN), a leading g

For immediate release Financial Contact: Sarah Cook Knowles Investor Relations Email: Investorrelations@knowles.

Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

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): October 29, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

Amended and Restated By-Laws of Knowles Corporation, effective as of

FIFTH AMENDED AND RESTATED BY-LAWS OF KNOWLES CORPORATION A Delaware Corporation Effective October 29, 2024 i TABLE OF CONTENTS Article I Offices .

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 September 30, 2024. 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 Numb

3rd Quarter 2024 Earnings Release Supplemental Information 1 0 . 2 4 . 2 4 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Se

3rd Quarter 2024 Earnings Release Supplemental Information 1 0 . 2 4 . 2 4 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued busi

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 24, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

Knowles Reports Q3 2024 Financial Results and Provides Outlook for Q4 2024 Third Quarter Revenues from Continuing Operations increased 32% on a year over year basis to $143M, at the high end of the guided range Net Cash from Operations of $53 million

Exhibit 99.1 Financial Contact: Sarah Cook Knowles Investor Relations Email: [email protected] Knowles Reports Q3 2024 Financial Results and Provides Outlook for Q4 2024 Third Quarter Revenues from Continuing Operations increased 32% on a year over year basis to $143M, at the high end of the guided range Net Cash from Operations of $53 million; exceeding the high end of the guided rang

Regulation FD Disclosure, Entry into a Material Definitive Agreement, Financial Statements and Exhibits

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): September 18, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission

, 2024, by and between Knowles Corporation and Syntiant Corp.*

Execution Version PURCHASE AND SALE AGREEMENT between KNOWLES CORPORATION, and SYNTIANT CORP.

S E P T E M B E R 2 0 2 4 Continuing our transformation. Through a combination of application knowledge, design, materials technology, and advanced manufacturing, we deliver superior solutions for demanding applications. Creating High Performance Ele

S E P T E M B E R 2 0 2 4 Continuing our transformation. Through a combination of application knowledge, design, materials technology, and advanced manufacturing, we deliver superior solutions for demanding applications. Creating High Performance Electronics for Tomorrow's Technology 2 $560M 2023 Pro Forma Revenue* 4,500 Employees 21% 2023 Pro Forma Adjusted EBITDA Margin* 11 Countries with Operat

Knowles Signs a Definitive Agreement for the Sale of the Consumer MEMS Microphone Business Transaction will further transform Knowles into a premier industrial technology company Updates Q3 Guidance and Provides Q4 revenue outlook for continuing oper

Exhibit 99.1 Financial Contact: Sarah Cook Knowles Investor Relations Email: [email protected] Knowles Signs a Definitive Agreement for the Sale of the Consumer MEMS Microphone Business Transaction will further transform Knowles into a premier industrial technology company Updates Q3 Guidance and Provides Q4 revenue outlook for continuing operations ITASCA, Ill., September 19, 2024 - K

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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): September 3, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 June 30, 2024. 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: 0

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 31, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

Consent Memorandum, dated June 17, 2024, among JPMorgan Chase Bank, N.A., and the other lenders party thereto

758717296 EXECUTION VERSION CONSENT MEMORANDUM TO: Knowles Corporation Lender Group RE: Consent to the Specified Disposition DATE: June 17, 2024 Reference is hereby made to that certain Amended and Restated Credit Agreement, dated as of February 8, 2023 (as amended, restated, supplemented or otherwise modified from time to time, the “Credit Agreement”), by and among Knowles Corporation, a Delaware corporation (the “Company”), Knowles Luxembourg International S.

2nd Quarter 2024 Earnings Release Supplemental Information July 31, 2024 2 Safe Harbor Forward Looking Statements .This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Sec

2nd Quarter 2024 Earnings Release Supplemental Information July 31, 2024 2 Safe Harbor Forward Looking Statements .

Knowles Reports Q2 2024 Financial Results and Provides Outlook for Q3 2024 Second Quarter Revenues increased 18% on a year over year basis to $205M, in line with guidance Net Cash from Operations of $25 million; at the mid-point of the Guided Range

Exhibit 99.1 Financial Contact: Sarah Cook Knowles Investor Relations Email: [email protected] Knowles Reports Q2 2024 Financial Results and Provides Outlook for Q3 2024 Second Quarter Revenues increased 18% on a year over year basis to $205M, in line with guidance Net Cash from Operations of $25 million; at the mid-point of the Guided Range ITASCA, Ill., July 31, 2024 - Knowles Corpor

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): June 18, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

For immediate release Financial Contact: Sarah Cook Knowles Investor Relations Email: [email protected] Knowles Appoints Jason Cardew to its Board of Directors ITASCA, Ill., June 18, 2024 — Knowles Corporation (NYSE: KN), a leading global

For immediate release Financial Contact: Sarah Cook Knowles Investor Relations Email: Investorrelations@knowles.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023. or o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-36102 A. Full title of the plan

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 1511 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices) 60

Conflict Minerals Report for the calendar year ended December 31, 2023.

1 Exhibit 1.01 Conflict Minerals Report Knowles Corporation has included this Conflict Minerals Report as an exhibit to its Form SD for 2023 as provided for in Rule 13p-1 under the Securities Exchange Act of 1934, as amended, and Form SD (collectively, the “Conflict Minerals Rule”). The date of filing of this Conflict Minerals Report is May 23, 2024. Information presented in this report is based o

Filing Fee Table

Exhibit 107 Calculation of Filing Fee Table FORM S-8 REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933 (Form Type) KNOWLES CORPORATION (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule Amount Registered (1) Proposed Maximum Offering Price Per Unit (2) Maximum Aggregate Offering Price (2) Fee Rate Amount of Registration Fee Equity Common Stock, $0.

As filed with the Securities and Exchange Commission on May 14, 2024

As filed with the Securities and Exchange Commission on May 14, 2024 Registration No.

Second Amended and Restated Knowles Corporation 2018 Equity and Cash Incentive Plan

KNOWLES CORPORATION 2018 EQUITY AND CASH INCENTIVE PLAN (Second Amended and Restated Effective April 30, 2024) I.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

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): April 30, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

Certificate of Amendment to the Restated Certificate of Incorporation of Knowles Corporation

CERTIFICATE OF AMENDMENT TO THE RESTATED CERTIFICATE OF INCORPORATION OF KNOWLES CORPORATION Knowles Corporation (the “Corporation”), a corporation organized and existing under the General Corporation Law of the State of Delaware (the “DGCL”), does hereby certify as follows: 1.

1st Quarter 2024 Earnings Release Supplemental Information May 1, 2024 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securi

1st Quarter 2024 Earnings Release Supplemental Information May 1, 2024 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

Knowles Reports Q1 2024 Financial Results and Provides Outlook for Q2 2024 Q1 2024 Revenue of $196 million; above the midpoint of the Guided Range Q1 Net Cash from Operations of $17 million; above the high end of the Guided Range

Exhibit 99.1 Financial Contact: Sarah Cook Knowles Investor Relations Email: [email protected] Knowles Reports Q1 2024 Financial Results and Provides Outlook for Q2 2024 Q1 2024 Revenue of $196 million; above the midpoint of the Guided Range Q1 Net Cash from Operations of $17 million; above the high end of the Guided Range ITASCA, Ill., May 1, 2024 - Knowles Corporation (NYSE: KN) ("Kn

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): May 1, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File Nu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 March 31, 2024. 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:

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☒ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

Knowles Corporation Policy on Recoupment of Incentive Compensation

1 KNOWLES CORPORATION POLICY ON RECOUPMENT OF INCENTIVE COMPENSATION Except as provided in this policy, the Compensation Committee of the Board of Directors (the "Committee") of Knowles Corporation (the "Company") shall, to the extent legally permitted, require the return, repayment or forfeiture of any performance-based cash or equity incentive compensation payment or award ("Covered Compensation

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2023. 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 Corpo

Subsidiaries of Knowles Corporation

Exhibit 21.1 List of Subsidiaries Company Name Where Incorporated Domestic CD Snow Hill, LLC Delaware Cornell Dublier Property Corp. South Carolina Cornell Dubilier, LLC Delaware Cornell-Dubilier Acquisition Corp. Delaware Cornell-Dubilier Marketing, Inc. Delaware Illinois Capacitor International, Inc. Illinois Illinois Capacitor, Inc. Illinois Integrated Microwave Corporation California Knowles C

KN / Knowles Corporation / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SC 13G/A 1 tv01293-knowlescorp.htm SCHEDULE 13G/A SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 10)* Name of issuer: Knowles Corp Title of Class of Securities: Common Stock CUSIP Number: 49926D109 Date of Event Which Requires Filing of this Statement: December 29, 2023 Check the appropriate box to designate the rule

KN / Knowles Corporation / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 6 )* Knowles Corp (Name of Issuer) Common Stock (Title of Class of Securities) 49926D109 (CUSIP Number) December 29, 2023 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to design

Knowles Reports Q4 & Full Year 2023 Financial Results and Provides Outlook for Q1 2024 Q4 Cash from Operations above the High End of Guidance Range Full Year operating cash flow and free cash flow margins of 17% and 15% of Revenues, respectively Comp

Exhibit 99.1 Financial Contact: Sarah Cook Knowles Investor Relations Email: [email protected] Knowles Reports Q4 & Full Year 2023 Financial Results and Provides Outlook for Q1 2024 Q4 Cash from Operations above the High End of Guidance Range Full Year operating cash flow and free cash flow margins of 17% and 15% of Revenues, respectively Completed the acquisition of Cornell Dubilier i

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 7, 2024 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

4th Quarter and Full Year 2023 Earnings Release Supplemental Information February 7, 2024 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United St

4th Quarter and Full Year 2023 Earnings Release Supplemental Information February 7, 2024 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

KN / Knowles Corporation / FRANKLIN MUTUAL ADVISERS LLC Passive Investment

SC 13G/A 1 know23a3.htm CUSIP NO. 49926D109 13G Page 1 of 8 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3)* Knowles Corporation (Name of Issuer) Common Stock, $0.01 par value per share (Title of Class of Securities) 49926D109 (CUSIP Number) December 31, 2023 (Date of Event Which Requires Filing of thi

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers

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): December 20, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

Secured Promissory Note issued by Knowles Capital Holdings, Inc. and Knowles Intermediate PD Holdings, LLC to James P. Kaplan on November 1, 2023

Execution Version KNOWLES CAPITAL HOLDINGS, INC. KNOWLES INTERMEDIATE PD HOLDINGS LLC SECURED PROMISSORY NOTE $122,900,000 November 1, 2023 FOR VALUE RECEIVED, the undersigned Knowles Capital Holdings, Inc., a Delaware corporation (“Knowles Capital”), and Knowles Intermediate PD Holdings, LLC, a Delaware limited liability company (“Knowles PD” and, together with Knowles Capital, the “Borrowers”),

Guarantee and Collateral Agreement dated as of November 1, 2023, among Knowles Corporation, as Guarantor, Knowles Capital Holdings, Inc. and Knowles Intermediate Holdings, Inc. as Grantors and James P. Kaplan, as Sellers' Representative

Execution Version GUARANTEE AND COLLATERAL AGREEMENT dated as of November 1, 2023, among KNOWLES CORPORATION, as Guarantor, KNOWLES CAPITAL HOLDINGS, INC.

3rd Quarter 2023 Earnings Release Supplemental Information November 2, 2023 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private S

3rd Quarter 2023 Earnings Release Supplemental Information November 2, 2023 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

Amendment to Purchase Agreement dated November 1, 2023, by and among Knowles Capital Holdings, Inc. and Knowles Intermediate PD Holdings, LLC and James Kaplan, in his capacity as Sellers' Representative

Execution Version AMENDMENT TO PURCHASE AND SALE AGREEMENT THIS AMENDMENT TO PURCHASE AND SALE AGREMEENT (this “Amendment”), dated as of November 1, 2023 (the “Amendment Effective Date”), is entered into by and among Knowles Capital Holdings, Inc.

Knowles Reports Q3 2023 Financial Results, Provides Outlook for Q4 2023 and Announces Completion of the Acquisition of Cornell Dubilier Q3 Diluted EPS at High-End of Guided Range; Q3 Non-GAAP Diluted EPS Above High-End of Guided Range Q3 Cash from Op

Exhibit 99.1 Financial Contact: Patton Hofer Knowles Investor Relations Email: [email protected] Knowles Reports Q3 2023 Financial Results, Provides Outlook for Q4 2023 and Announces Completion of the Acquisition of Cornell Dubilier Q3 Diluted EPS at High-End of Guided Range; Q3 Non-GAAP Diluted EPS Above High-End of Guided Range Q3 Cash from Operations Above High-End of Guided Range I

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 September 30, 2023. 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 Numb

Financial Statements and Exhibits, Results of Operations and Financial Condition

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 2, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

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): September 25, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission

Amendment No. 1 to Amended and Restated Credit Agreement dated as of September 25, 2023, among Knowles Corporation, JP Morgan Chase Bank N.A., and the other lenders party thereto

exhibit101tokn8k092723 EXECUTION VERSION AMENDMENT NO. 1 to AMENDED AND RESTATED CREDIT AGREEMENT THIS AMENDMENT NO. 1 (this “Amendment”) is made as of September 25, 2023 by and among Knowles Corporation, a Delaware corporation (the “Company”), the financial institutions listed on the signature pages hereof and JPMorgan Chase Bank, N.A. (“JPMorgan”), as Administrative Agent (the “Administrative Ag

Entry into a Material Definitive Agreement, Financial Statements and Exhibits

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): September 15, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission

Purchase and Sale Agreement dated September 15, 2023, among Knowles Corporation, Knowles Capital Holdings, Inc., Knowles Intermediate PD Holdings, LLC, Cornell Dubilier Electronics, Inc., CD Aero, LLC, Kaplan Electronics, Inc. and the Sellers' Representative, Shareholders and Guarantors party thereto

EXECUTION VERSION PURCHASE AND SALE AGREEMENT by and among KNOWLES CORPORATION, KNOWLES CAPITAL HOLDINGS, INC.

Regulation FD Disclosure, Financial Statements and Exhibits

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): September 18, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission

Knowles Takes Strategic Actions that Accelerate Transformation to Industrial Technology Company September 18, 2023 1 The information contained in this document is confidential and/or proprietary to Knowles Corporation and/or its affiliates. Please do

Knowles Takes Strategic Actions that Accelerate Transformation to Industrial Technology Company September 18, 2023 1 The information contained in this document is confidential and/or proprietary to Knowles Corporation and/or its affiliates.

Knowles Announces Next Phase of Transformation to an Industrial Technology Company Enters into Agreement to Acquire Cornell Dubilier for Total Cash Consideration of $263 Million, Adding Film, Electrolytic and Mica Capacitor Product Offerings; Expecte

Knowles Announces Next Phase of Transformation to an Industrial Technology Company Enters into Agreement to Acquire Cornell Dubilier for Total Cash Consideration of $263 Million, Adding Film, Electrolytic and Mica Capacitor Product Offerings; Expected to be Accretive to Non-GAAP EPS in 2024 Announces Exploration of Strategic Alternatives for Consumer MEMS Microphones Segment Actions Reflect Execution of Strategic Roadmap to Increase Exposure to High-Growth Medtech, Defense & Aerospace, and Industrial Electrification End Markets ITASCA, Ill.

Knowles Reports Q2 2023 Financial Results and Provides Outlook for Q3 Q2 Gross Profit Margins Exceed High-End of Guided Range Q2 Diluted EPS at High-End of Guided Range; Q2 Non-GAAP Diluted EPS Above Mid-Point of Guided Range

Exhibit 99.1 Financial Contact: Patton Hofer Knowles Investor Relations Email: [email protected] Knowles Reports Q2 2023 Financial Results and Provides Outlook for Q3 Q2 Gross Profit Margins Exceed High-End of Guided Range Q2 Diluted EPS at High-End of Guided Range; Q2 Non-GAAP Diluted EPS Above Mid-Point of Guided Range ITASCA, Ill., August 2, 2023 - Knowles Corporation (NYSE: KN) ("K

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): August 2, 2023 Knowles Corporatio

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): August 2, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

2nd Quarter 2023 Earnings Release Supplemental Information August 2, 2023 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Sec

2nd Quarter 2023 Earnings Release Supplemental Information August 2, 2023 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 June 30, 2023. 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: 0

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022. or o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-36102 A. Full title of the plan

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 1511 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices) 60

Conflict Minerals Report for the calendar year ended December 31, 202

formsd2022ex101 1 Exhibit 1.01 Conflict Minerals Report Knowles Corporation has included this Conflict Minerals Report as an exhibit to its Form SD for 2022 as provided for in Rule 13p-1 under the Securities Exchange Act of 1934, as amended, and Form SD (collectively, the “Conflict Minerals Rule”). The date of filing of this Conflict Minerals Report is May 24, 2023. Information presented in this r

For immediate release Financial Contact: Patton Hofer Knowles Investor Relations Email: [email protected] Knowles Appoints Erania Brackett to its Board of Directors ITASCA, Ill., May 16, 2023 — Knowles Corporation (NYSE: KN), a market lea

exhibit991tokn8k051623 For immediate release Financial Contact: Patton Hofer Knowles Investor Relations Email: Investorrelations@knowles.

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): May 16, 2023 Knowles Corporation

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): May 16, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File N

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): May 2, 2023 Knowles Corporation (

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): May 2, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File Nu

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 March 31, 2023. 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:

Knowles Reports Q1 2023 Financial Results and Provides Outlook for Q2 Q1 Gross Profit Margins Exceed High-End of Guided Range Q1 Cash from Operations Above Expectations Strong Sequential Revenue and Earnings Growth Expected in Q2

Exhibit 99.1 Financial Contact: Patton Hofer Knowles Investor Relations Email: [email protected] Knowles Reports Q1 2023 Financial Results and Provides Outlook for Q2 Q1 Gross Profit Margins Exceed High-End of Guided Range Q1 Cash from Operations Above Expectations Strong Sequential Revenue and Earnings Growth Expected in Q2 ITASCA, Ill., April 27, 2023 - Knowles Corporation (NYSE: KN)

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): April 27, 2023 Knowles Corporatio

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): April 27, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

1st Quarter 2023 Earnings Release Supplemental Information April 27, 2023 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Sec

exhibit992q12023 1st Quarter 2023 Earnings Release Supplemental Information April 27, 2023 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☐ Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ☒ Defin

• • • • • • • • • • $ • • • • • • • • • • • remove the “mid- term target” time reference, just focus it on $2.50. • • • • • • • • • • • • • • • • • July 28, 2021 Key Financial Metrics (Unaudited) * For this Non-GAAP financial measure see the Appendix

exhibit991tokn8k022323 • • • • • • • • • • $ • • • • • • • • • • • remove the “mid- term target” time reference, just focus it on $2.

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): February 23, 2023 Knowles Corpora

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): February 23, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

KN / Knowles Corp / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

SC 13G/A 1 SEC13GFiling.htm SEC SCHEDULE 13G UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 5 )* Knowles Corp (Name of Issuer) Common Stock (Title of Class of Securities) 49926D109 (CUSIP Number) December 30, 2022 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to design

Knowles Reports Q4 & Full Year 2022 Financial Results and Provides Outlook for Q1 2023 Q4 Gross Margin at High-End of Guided Range; Q4 Non-GAAP Gross Margin Above High-End of Guided Range Weak Consumer End-Market Demand Continues in Q1 $400 million S

EX-99.1 3 exhibit991q42022.htm EX-99.1 Exhibit 99.1 Financial Contact: Patton Hofer Knowles Investor Relations Email: [email protected] Knowles Reports Q4 & Full Year 2022 Financial Results and Provides Outlook for Q1 2023 Q4 Gross Margin at High-End of Guided Range; Q4 Non-GAAP Gross Margin Above High-End of Guided Range Weak Consumer End-Market Demand Continues in Q1 $400 million Sen

Subsidiaries of Knowles Corporation

Exhibit 21.1 List of Subsidiaries Company Name Where Incorporated Domestic Integrated Microwave Corporation California Knowles Capital Holdings, Inc. Delaware Knowles Cazenovia Inc. Delaware Knowles Electronics Holdings, Inc. Delaware Knowles Electronics, LLC Delaware Knowles Intermediate Holding, Inc. Delaware Novacap, LLC Delaware Sensor Platforms, Inc. Delaware Foreign Audience Communications S

4th Quarter and Full Year 2022 Earnings Release Supplemental Information February 9, 2023 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United St

4th Quarter and Full Year 2022 Earnings Release Supplemental Information February 9, 2023 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

KN / Knowles Corp / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 9)* Name of issuer: Knowles Corp. Title of Class of Securities: Common Stock CUSIP Number: 49926D109 Date of Event Which Requires Filing of this Statement: December 30, 2022 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule

Amended and Restated Credit Agreement dated as of February 8, 2023, among Knowles Corporation, JPMorgan Chase Bank, N.A. and the other lenders thereto

751388367 EXECUTION VERSION AMENDED AND RESTATED CREDIT AGREEMENT dated as of February 8, 2023, among KNOWLES CORPORATION, KNOWLES LUXEMBOURG INTERNATIONAL S.

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant, Results of Operations and Financial Condition

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): February 8, 2023 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

Description of Securities

a20221231exhibit41 Exhibit 4.1 DESCRIPTION OF THE REGISTRANT'S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2022, Knowles Corporation ("we", "us", "our", "Knowles" or the "Company") had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"): our common stock. Description o

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022. 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 Corpo

KN / Knowles Corp / FRANKLIN MUTUAL ADVISERS LLC Passive Investment

SC 13G/A 1 know22a2.htm CUSIP NO. 49926D109 13G Page 1 of 8 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Knowles Corporation (Name of Issuer) Common Stock, $0.01 par value per share (Title of Class of Securities) 49926D109 (CUSIP Number) December 31, 2022 (Date of Event Which Requires Filing of thi

Regulation FD Disclosure, Financial Statements and Exhibits

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 28, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

Investor Presentation November 29, 2022 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1

Investor Presentation November 29, 2022 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

Regulation FD Disclosure, Financial Statements and Exhibits

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 16, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

For immediate release Financial Contact: Patton Hofer Vice President, Investor Relations Email: [email protected] Knowles Announces Changes to Segment Names and Reporting Structure ITASCA, Ill., November 16, 2022 — Knowles Corporation (NY

For immediate release Financial Contact: Patton Hofer Vice President, Investor Relations Email: Investorrelations@knowles.

Fourth Amended and Restated By-Laws of Knowles Corporation

exhibit31 1 FOURTH AMENDED AND RESTATED BY-LAWS OF KNOWLES CORPORATION A Delaware Corporation Effective October 25, 2022 i TABLE OF CONTENTS ARTICLE I OFFICES .

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 September 30, 2022. 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 Numb

Knowles Reports Q3 2022 Financial Results and Provides Outlook for Q4 Revenue and Gross Margin above Guided Mid-point, EPS Above Guided Range Record Revenue and Continued Strong Bookings in Precision Devices $19 million in Share Repurchases

Exhibit 99.1 Financial Contact: John Anderson Knowles Investor Relations Email: [email protected] Knowles Reports Q3 2022 Financial Results and Provides Outlook for Q4 Revenue and Gross Margin above Guided Mid-point, EPS Above Guided Range Record Revenue and Continued Strong Bookings in Precision Devices $19 million in Share Repurchases ITASCA, Ill., October 27, 2022 - Knowles Corporat

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): October 25, 2022 Knowles Corporat

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): October 25, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

3rd Quarter 2022 Earnings Release Supplemental Information October 27, 2022 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private S

exhibit992q32022 3rd Quarter 2022 Earnings Release Supplemental Information October 27, 2022 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

Jefferies Industrials Conference August 9, 2022 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform

Jefferies Industrials Conference August 9, 2022 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

Regulation FD Disclosure, Financial Statements and Exhibits

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): August 9, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

Financial Statements and Exhibits, Costs Associated with Exit or Disposal Activities, Results of Operations and Financial Condition

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): July 28, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

Knowles Reports Q2 2022 Financial Results and Announces Restructuring Program Q2 Gross Margin of 41.3% and Non-GAAP Gross Margin of 41.5%, at the midpoint of guidance range Q2 Precision Devices and Hearing Health Revenue both up 19% year-over-year Re

Exhibit 99.1 Financial Contact: John Anderson Knowles Investor Relations Email: [email protected] Knowles Reports Q2 2022 Financial Results and Announces Restructuring Program Q2 Gross Margin of 41.3% and Non-GAAP Gross Margin of 41.5%, at the midpoint of guidance range Q2 Precision Devices and Hearing Health Revenue both up 19% year-over-year Restructuring Program expected to accelera

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 June 30, 2022. 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: 0

2nd Quarter 2022 Earnings Release Supplemental Information August 2, 2022 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Sec

2nd Quarter 2022 Earnings Release Supplemental Information August 2, 2022 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

For immediate release Financial Contact: John Anderson Knowles Investor Relations Email: [email protected] Knowles Appoints Daniel J. Crowley to its Board of Directors ITASCA, Ill., July 26, 2022 — Knowles Corporation (NYSE: KN), a market

For immediate release Financial Contact: John Anderson Knowles Investor Relations Email: Investorrelations@knowles.

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): July 26, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

11-K 1 knowles2021-11xk.htm 11-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021. or o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 00

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter)

SD 1 knowlescorpformsd-2021.htm SD UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 1511 Maplewood Drive, Itasca, IL (Address

Conflict Minerals Report for the calendar year ended December 31, 2021.

1 Exhibit 1.01 Conflict Minerals Report Knowles Corporation has included this Conflict Minerals Report as an exhibit to its Form SD for 2021 as provided for in Rule 13p-1 under the Securities Exchange Act of 1934, as amended, and Form SD (collectively, the “Conflict Minerals Rule”). The date of filing of this Conflict Minerals Report is May 26, 2022. Information presented in this report is based o

KN / Knowles Corp / FRANKLIN MUTUAL ADVISERS LLC Passive Investment

SC 13G/A 1 know22a1.htm CUSIP NO. 49926D109 13G Page 1 of 8 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 1)* Knowles Corporation (Name of Issuer) Common stock, $0.01 par value per share (Title of Class of Securities) 49926D109 (CUSIP Number) April 30, 2022 (Date of Event Which Requires Filing of this S

$ • • • • • • • Electronics Experience 10 Years 24 Years 25 Years 18 Years 19 Years 28 Years 16 Years 29 Years 25 Years 26 Years In-House Counsel Experience Achievements • • • • • • remove the “mid- term target” time reference, just focus it on $2.50

$ ? ? ? ? ? ? ? Electronics Experience 10 Years 24 Years 25 Years 18 Years 19 Years 28 Years 16 Years 29 Years 25 Years 26 Years In-House Counsel Experience Achievements ? ? ? ? ? ? remove the ?mid- term target? time reference, just focus it on $2.

Regulation FD Disclosure, Financial Statements and Exhibits

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): May 2, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File Nu

Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

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): April 26, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

• • • • • • • • July 28, 2021 Appendix July 28, 2021 Notes: (5) The number of shares used in the diluted per share calculations on a non-GAAP basis excludes the impact of stock-based compensation expense expected to be incurred in future periods and

? ? ? ? ? ? ? ? July 28, 2021 Appendix July 28, 2021 Notes: (5) The number of shares used in the diluted per share calculations on a non-GAAP basis excludes the impact of stock-based compensation expense expected to be incurred in future periods and not yet recognized in the financial statements, which would otherwise be assumed to be used to repurchase shares under the GAAP treasury stock method.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 March 31, 2022. 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:

Regulation FD Disclosure, Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 28, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

Knowles Reports Q1 2022 Financial Results and Announces $150 Million Increase in Share Repurchase Program Q1 Gross Margin of 41.4%, up 260 Basis Points Year-over-Year Q1 Non-GAAP Gross Margin of 41.6%, up 260 Basis Points Year-over-Year

Exhibit 99.1 Financial Contact: John Anderson Knowles Investor Relations Email: [email protected] Knowles Reports Q1 2022 Financial Results and Announces $150 Million Increase in Share Repurchase Program Q1 Gross Margin of 41.4%, up 260 Basis Points Year-over-Year Q1 Non-GAAP Gross Margin of 41.6%, up 260 Basis Points Year-over-Year ITASCA, Ill., April 28, 2022 - Knowles Corporation (N

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. )

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2)) ? Defin

KN / Knowles Corp / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 8)* Name of issuer: Knowles Corp. Title of Class of Securities: Common Stock CUSIP Number: 49926D109 Date of Event Which Requires Filing of this Statement: December 31, 2021 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ??Rule

Regulation FD Disclosure, Financial Statements and Exhibits

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): February 10, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

$ • • • • • • • Electronics Experience 10 Years 24 Years 25 Years 18 Years 19 Years 28 Years 16 Years 29 Years 25 Years 26 Years In-House Counsel Experience Achievements • • • • • • remove the “mid- term target” time reference, just focus it on $2.50

$ ? ? ? ? ? ? ? Electronics Experience 10 Years 24 Years 25 Years 18 Years 19 Years 28 Years 16 Years 29 Years 25 Years 26 Years In-House Counsel Experience Achievements ? ? ? ? ? ? remove the ?mid- term target? time reference, just focus it on $2.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ? ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2021. 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 Corpo

Knowles Reports Q4 & Full Year 2021 Financial Results and Provides Outlook for Q1 2022 Q4 Gross Margin of 43.1%; Non-GAAP Gross Margin of 43.3% Q4 Diluted EPS of $0.98; Non-GAAP Diluted EPS of $0.48 FY Earnings from Continuing Operations of $150 mill

Exhibit 99.1 Financial Contact: John Anderson Knowles Investor Relations Email: [email protected] Knowles Reports Q4 & Full Year 2021 Financial Results and Provides Outlook for Q1 2022 Q4 Gross Margin of 43.1%; Non-GAAP Gross Margin of 43.3% Q4 Diluted EPS of $0.98; Non-GAAP Diluted EPS of $0.48 FY Earnings from Continuing Operations of $150 million; Adjusted EBIT of $174 million or 20

Subsidiaries of Knowles Corporation

Exhibit 21.1 List of Subsidiaries Company Name Where Incorporated Domestic Integrated Microwave Corporation California Knowles Capital Holdings, Inc. Delaware Knowles Cazenovia Inc. Delaware Knowles Electronics Holdings, Inc. Delaware Knowles Electronics, LLC Delaware Knowles Intermediate Holding, Inc. Delaware Novacap, LLC Delaware Sensor Platforms, Inc. Delaware Foreign Audience Communications S

• • • • • • • • remove the “mid- term target” time reference, just focus it on $2.50. • • • • • • • • July 28, 2021 Appendix July 28, 2021 (in millions, except per share amounts) 2021 2020 Gross profit 100.9$ 92.0$ Gross profit margin 43.1% 37.8% Sto

? ? ? ? ? ? ? ? remove the ?mid- term target? time reference, just focus it on $2.

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 9, 2022 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

KN / Knowles Corp / DIMENSIONAL FUND ADVISORS LP - SEC SCHEDULE 13G Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 4 )* Knowles Corp (Name of Issuer) Common Stock (Title of Class of Securities) 49926D109 (CUSIP Number) December 31, 2021 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule

KN / Knowles Corp / FRANKLIN MUTUAL ADVISERS LLC Passive Investment

know21in1.htm - Generated by SEC Publisher for SEC Filing CUSIP NO. 49926D109 13G Page 1 of 8 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. )* Knowles Corporation (Name of Issuer) Common stock, $0.01 par value per share (Title of Class of Securities) 49926D109 (CUSIP Number) December 31, 2021 (Date of E

Investor Presentation November 30, 2021 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1

Investor Presentation November 30, 2021 2 Safe Harbor Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995, such as statements about our future plans, objectives, expectations, financial performance, and continued business operations.

Regulation FD Disclosure, Financial Statements and Exhibits

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 30, 2021 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

Entry into a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant

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 3, 2021 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

First Amendment, dated November 3, 2021, by and among Knowles Corporation, JPMorgan Chase Bank, N.A. and the other lenders party thereto.

EXECUTION VERSION [[5720665]] FIRST AMENDMENT dated as of November 3, 2021 (this ?Agreement?), to the Credit Agreement dated as of September 4, 2020 (the ?Existing Credit Agreement?), among KNOWLES CORPORATION, a Delaware corporation (the ?Company?), KNOWLES LUXEMBOURG INTERNATIONAL S.

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 September 30, 2021. 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 Numb

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 27, 2021 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

Knowles Reports Q3 2021 Financial Results and Provides Outlook for Q4 2021 Q3 Gross Margin of 41.6 Percent; Q3 Non–GAAP Gross Margin of 41.8 Percent Q3 Diluted EPS of $0.29; Q3 Non-GAAP Diluted EPS of $0.45 Q3 Cash from Operations of $56 million

Exhibit 99.1 Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Reports Q3 2021 Financial Results and Provides Outlook for Q4 2021 Q3 Gross Margin of 41.6 Percent; Q3 Non?GAAP Gross Margin of 41.8 Percent Q3 Diluted EPS of $0.29; Q3 Non-GAAP Diluted EPS of $0.45 Q3 Cash from Operations of $56 million ITASCA, Ill., Oct. 27, 2021 - Kn

October 27, 2021 Q3 2021 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP. In addition to the GAAP results included in this pre

October 27, 2021 Q3 2021 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP.

July 28, 2021 Q2 2021 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP. In addition to the GAAP results included in this presen

July 28, 2021 Q2 2021 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP.

Knowles Reports Q2 2021 Financial Results and Provides Outlook for Q3 2021 Q2 Revenues up 31 Percent from Year Ago Period Q2 Gross Margin of 41.9 Percent; Q2 Non–GAAP Gross Margin of 42.4 Percent Q2 Diluted EPS of $0.18; Q2 Non-GAAP Diluted EPS of $0

Exhibit 99.1 Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Reports Q2 2021 Financial Results and Provides Outlook for Q3 2021 Q2 Revenues up 31 Percent from Year Ago Period Q2 Gross Margin of 41.9 Percent; Q2 Non?GAAP Gross Margin of 42.4 Percent Q2 Diluted EPS of $0.18; Q2 Non-GAAP Diluted EPS of $0.31 ITASCA, Ill., Jul. 28, 2

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 28, 2021 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 June 30, 2021. 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: 0

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020. or o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 001-36102 A. Full title of the plan

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 1511 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices) 60

Conflict Minerals Report for the calendar year ended December 31, 2020.

1 Exhibit 1.01 Conflict Minerals Report Knowles Corporation has included this Conflict Minerals Report as an exhibit to its Form SD for 2020 as provided for in Rule 13p-1 under the Securities Exchange Act of 1934, as amended, and Form SD (collectively, the ?Conflict Minerals Rule?). The date of filing of this Conflict Minerals Report is May 25, 2021. Unless the context indicates otherwise, the ter

Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

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): April 27, 2021 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

Quarterly Report - 10-Q

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 March 31, 2021. 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:

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 22, 2021 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

Knowles Reports Q1 2021 Financial Results and Provides Outlook for Q2 2021 Q1 Sales up 23 Percent from Year Ago Period Q1 Gross Margins Above Midpoint of Guidance Range Expect Q2 Revenue to Increase 28 Percent From Year Ago at Midpoint of Guidance

Exhibit 99.1 Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Reports Q1 2021 Financial Results and Provides Outlook for Q2 2021 Q1 Sales up 23 Percent from Year Ago Period Q1 Gross Margins Above Midpoint of Guidance Range Expect Q2 Revenue to Increase 28 Percent From Year Ago at Midpoint of Guidance ITASCA, Ill., Apr. 22, 2021 -

April 22, 2021 Q1 2021 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP. In addition to the GAAP results included in this prese

April 22, 2021 Q1 2021 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP.

- DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confide

- DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ? Filed by a Party other than the Registrant ? Check the appropriate box: ? Preliminary Proxy Statement ? Confide

SCHEDULE 13G

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 3 )* Knowles Corp (Name of Issuer) Common Stock (Title of Class of Securities) 49926D109 (CUSIP Number) December 31, 2020 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule

Subsidiaries of Knowles Corporation

Exhibit 21.1 List of Subsidiaries Company Name Where Incorporated Domestic Knowles Capital Holdings, Inc. Delaware Knowles Cazenovia Inc. Delaware Knowles Electronics Holdings, Inc. Delaware Knowles Electronics, LLC Delaware Knowles Intermediate Holding, Inc. Delaware Novacap, LLC Delaware Sensor Platforms, Inc. Delaware Foreign Audience Communications Systems India Private Limited India Audience

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2020. 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 Corpo

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)*

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 7)* Name of issuer: Knowles Corp. Title of Class of Securities: Common Stock CUSIP Number: 49926D109 Date of Event Which Requires Filing of this Statement: December 31, 2020 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule

Description of Securities

Exhibit 4.3 DESCRIPTION OF THE REGISTRANT'S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2020, Knowles Corporation ("we", "us", "our", "Knowles" or the "Company") had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"): our common stock. Description of Common Stock The

February 4, 2021 Q4 2020 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP. In addition to the GAAP results included in this pre

exhibit992q42020 February 4, 2021 Q4 2020 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP.

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

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): February 4, 2021 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

Knowles Reports Q4 & Full Year 2020 Financial Results and Provides Outlook for Q1 2021 Q4 Sales up 18 Percent Sequentially and 4 Percent from Year Ago Period Record Cash From Operations of $76 Million in Q4 Expect Q1 Revenue to Increase 23 Percent Fr

Exhibit 99.1 Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Reports Q4 & Full Year 2020 Financial Results and Provides Outlook for Q1 2021 Q4 Sales up 18 Percent Sequentially and 4 Percent from Year Ago Period Record Cash From Operations of $76 Million in Q4 Expect Q1 Revenue to Increase 23 Percent From Year Ago at Midpoint of G

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): January 11, 2021 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

For immediate release Contact: Mike Knapp Investor Relations Phone: 630.238.5236 Email: [email protected] KNOWLES ANNOUNCES PRELIMINARY Q4 2020 RESULTS AND SETS DATE FOR Q4 EARNINGS CALL Expected Q4 Sales of Approximately $243 Million Driven by

exhibit991tokn8k11121 For immediate release Contact: Mike Knapp Investor Relations Phone: 630.

Knowles Reports Q3 2020 Financial Results and Provides Outlook for Q4 2020 Better-Than-Expected Q3 Sales Driven by Audio Cash From Operations of $28 Million in Q3 Expect Q4 Revenue to Increase 6 Percent Sequentially at Midpoint of Guidance

Exhibit 99.1 Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Reports Q3 2020 Financial Results and Provides Outlook for Q4 2020 Better-Than-Expected Q3 Sales Driven by Audio Cash From Operations of $28 Million in Q3 Expect Q4 Revenue to Increase 6 Percent Sequentially at Midpoint of Guidance ITASCA, Ill., Oct. 29, 2020 - Knowles

Q3 2020 October 29, 2020 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP. In addition to the GAAP results included in this pre

exhibit992q32020 Q3 2020 October 29, 2020 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP.

Financial Statements and Exhibits, Results of Operations and Financial Condition - 8-K

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): October 29, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 September 30, 2020. 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 Know

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 13, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

For immediate release Contact: Mike Knapp Investor Relations Phone: 630.238.5236 Email: [email protected] KNOWLES ANNOUNCES PRELIMINARY THIRD QUARTER 2020 REVENUE ABOVE HIGH END OF GUIDANCE RANGE AND SETS DATE FOR Q3 EARNINGS CALL ITASCA, Ill.,

exhibit99110-13x208xkpre For immediate release Contact: Mike Knapp Investor Relations Phone: 630.

Entry into a Material Definitive Agreement, Termination of a Material Definitive Agreement, Financial Statements and Exhibits, Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant - 8-K

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): September 4, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

Credit Agreement dated as of September 4, 2020, among Knowles Corporation, JPMorgan Chase Bank, N.A. and the other lenders thereto

exhibit101tokn8-k9x8x202 EXECUTION VERSION CREDIT AGREEMENT dated as of September 4, 2020, among KNOWLES CORPORATION, KNOWLES LUXEMBOURG INTERNATIONAL S.

Knowles Reports Q2 2020 Financial Results and Provides Outlook for Q3 2020 Q2 Sales of MEMS microphones and Precision Devices Better-Than-Expected Cash From Operations of $27 Million in Q2 Expect Q3 Revenue to Increase 26 Percent Sequentially at Midp

Exhibit 99.1 Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Reports Q2 2020 Financial Results and Provides Outlook for Q3 2020 Q2 Sales of MEMS microphones and Precision Devices Better-Than-Expected Cash From Operations of $27 Million in Q2 Expect Q3 Revenue to Increase 26 Percent Sequentially at Midpoint of Guidance ITASCA, Ill

Q2 2020 July 29, 2020 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP. In addition to the GAAP results included in this presen

exhibit992q22020 Q2 2020 July 29, 2020 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP.

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 June 30, 2020. 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 C

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): July 29, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

Submission of Matters to a Vote of Security Holders

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 8-K/A CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of earliest event reported): April 27, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

- 11-K

11-K 1 knowles2019-11xk.htm 11-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 11-K (Mark One) x ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019. or o TRANSITION REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission File Number: 00

Costs Associated with Exit or Disposal Activities

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): June 12, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

Conflict Minerals Report as required by Items 1.01 and 1.02 of this Form.

Exhibit 1.01 Conflict Minerals Report Knowles Corporation has included this Conflict Minerals Report as an exhibit to its Form SD for 2019 as provided for in Rule 13p-1 under the Securities Exchange Act of 1934, as amended, and Form SD (collectively, the “Conflict Minerals Rule”). The date of filing of this Conflict Minerals Report is May 22, 2020. Unless the context indicates otherwise, the terms

- SD

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM SD SPECIALIZED DISCLOSURE REPORT Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File Number) (I.R.S. Employer Identification No.) 1511 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices) 60

For immediate release Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Appoints Michael Wishart to the Board of Directors ITASCA, Ill., May 18, 2020 — Knowles Corporation (NYSE: KN),

wishartreleasefinal For immediate release Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: mike.

Third Amended and Restated By-laws of Knowles Corporation

thirdamendedandrestatedb THIRD AMENDED AND RESTATED BY-LAWS OF KNOWLES CORPORATION A Delaware Corporation Effective May 15, 2020 1 TABLE OF CONTENTS ARTICLE I OFFICES .

Regulation FD Disclosure, Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year, Financial Statements and Exhibits

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): May 15, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File N

- S-8

As filed with the Securities and Exchange Commission on May 14, 2020 Registration No.

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 March 31, 2020. 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

Knowles Reports Q1 2020 Financial Results

Exhibit 99.1 Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Reports Q1 2020 Financial Results ITASCA, Ill., May 4, 2020 - Knowles Corporation (NYSE: KN), a market leader and global provider of advanced micro-acoustic, audio processing, and precision device solutions, today announced results for the quarter ended March 31, 2020.

Q1 2020 May 4, 2020 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP. In addition to the GAAP results included in this presenta

exhibit992q12020 Q1 2020 May 4, 2020 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP.

Financial Statements and Exhibits, Results of Operations and Financial Condition, Other Events

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): May 4, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File Nu

Form of Non-Employee Director Restricted Stock Unit Award Agreement

form-knowlesdirectorsrsu Non-Employee Director Restricted Stock Unit Award Agreement This AGREEMENT between Knowles Corporation, a Delaware corporation (the "Company"), and [Director Name] (the "Grantee') is made as of [Grant Date] (the "Grant Date"), subject to the Grantee's acceptance this Agreement in accordance with Section 10 hereof.

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits, Submission of Matters to a Vote of Security Holders

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): April 27, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

Knowles Corporation Executive Severance Plan

knowlescorporationexecut KNOWLES CORPORATION EXECUTIVE SEVERANCE PLAN (As Amended and Restated Effective April 27, 2020) Introduction This Knowles Corporation Executive Severance Plan (the “Plan”) sets forth the policy of Knowles Corporation, a Delaware corporation (“Knowles”), and each of its Subsidiaries (as defined in Article 13) which employs an “Eligible Executive” (as defined in Article 1) with respect to “Severance Payments” (as defined in Article 5) payable to an Eligible Executive under the Plan.

Knowles Corporation Senior Executive Change-in-Control Severance Plan

knowlesseniorexecutivech KNOWLES CORPORATION SENIOR EXECUTIVE CHANGE-IN-CONTROL SEVERANCE PLAN (As Amended and Restated Effective April 27, 2020) Introduction This Knowles Corporation Senior Executive Change-in-Control Severance Plan (the “Plan”) sets forth the policy of Knowles Corporation, a Delaware corporation (“Knowles”), and each of its Subsidiaries (as defined in Article 14) which employs an “Eligible Executive” (as defined in Article 1) with respect to “Severance Payments” (as defined in Article 5) payable to an Eligible Executive under the Plan (Knowles and such Subsidiaries are collectively referred to as the “Company”).

Amended and Restated Knowles Corporation 2018 Equity and Cash Incentive Plan

amendedandrestated2018eq KNOWLES CORPORATION 2018 EQUITY AND CASH INCENTIVE PLAN (As Amended and Restated Effective April 28, 2020) I.

KN / Knowles Corp DEFA14A - - DEFA14A

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐

Knowles Announces Preliminary First Quarter 2020 Results and Sets Date to Review Detailed Results

Exhibit 99.1 Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Announces Preliminary First Quarter 2020 Results and Sets Date to Review Detailed Results ITASCA, Ill., Apr. 13, 2020 - Knowles Corporation (NYSE: KN), a market leader and global provider of advanced micro-acoustic, audio processing, and precision device solutions, toda

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): April 13, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission File

KN / Knowles Corp DEFA14A - - DEFA14A

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐

KN / Knowles Corp DEFA14A - - DEFA14A

DEFA14A UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐

KN / Knowles Corp DEF 14A - - DEF 14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confide

KN / Knowles Corp DEFA14A - - DEFA14A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A (Rule 14a-101) INFORMATION REQUIRED IN PROXY STATEMENT SCHEDULE 14A INFORMATION Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 (Amendment No. ) Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box: ☐ Preliminary Proxy Statement ☐ Confide

Regulation FD Disclosure, Financial Statements and Exhibits

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): February 24, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

For immediate release Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Announces $100 Million Share Repurchase Program ITASCA, Ill., Feb. 24, 2020 — Knowles Corporation (NYSE: KN), a

exhibit991tokn8k22420 For immediate release Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: mike.

KN / Knowles Corp / DIMENSIONAL FUND ADVISORS LP - SCHEDULE 13G/A Passive Investment

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* KNOWLES CORP (Name of Issuer) Common Stock (Title of Class of Securities) 49926D109 (CUSIP Number) December 31, 2019 (Date of Event Which Requires Filing of this Statement) Check the appropriate box to designate the rule pursuant to which this Schedule i

KN / Knowles Corp / VANGUARD GROUP INC - SCHEDULE 13G/A Passive Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Schedule 13G Under the Securities Exchange Act of 1934 (Amendment No.: 6)* Name of issuer: Knowles Corp Title of Class of Securities: Common Stock CUSIP Number: 49926D109 Date of Event Which Requires Filing of this Statement: December 31, 2019 Check the appropriate box to designate the rule pursuant to which this Schedule is filed: ☒ Rule 1

Description of Securities

exhibit43 Exhibit 4.3 DESCRIPTION OF THE REGISTRANT’S SECURITIES REGISTERED PURSUANT TO SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934 As of December 31, 2019, Knowles Corporation ("we", "us", "our", "Knowles" or the "Company") had one class of securities registered under Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): our common stock. Description of Common

Annual Report - 10-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 or 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019. 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 Corpo

Subsidiaries of Knowles Corporation

Exhibit 21.1 List of Subsidiaries Company Name Where Incorporated Domestic Knowles Capital Holdings, Inc. Delaware Knowles Cazenovia Inc. Delaware Knowles Electronics Holdings, Inc. Delaware Knowles Electronics, LLC Delaware Knowles Intermediate Holding, Inc. Delaware Novacap, LLC Delaware Sensor Platforms, Inc. Delaware Foreign Audience Communications Systems India Private Limited India Audience

Knowles Reports Q4 & Full Year 2019 Financial Results and Provides Outlook for Q1 2020 Q4 Revenues Up 5 Percent Y/Y Revenues from Non-Mobile More Than 70 Percent of Total Sales in 2019 Record Cash From Operations of $124 million in 2019

Exhibit 99.1 Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Reports Q4 & Full Year 2019 Financial Results and Provides Outlook for Q1 2020 Q4 Revenues Up 5 Percent Y/Y Revenues from Non-Mobile More Than 70 Percent of Total Sales in 2019 Record Cash From Operations of $124 million in 2019 ITASCA, Ill., Feb. 4, 2020 - Knowles Corp

Q4 2019 February 4, 2020 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP. In addition to the GAAP results included in this pre

exhibit992q42019 Q4 2019 February 4, 2020 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP.

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): February 4, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

KN / Knowles Corp / FRANKLIN RESOURCES INC Passive Investment

know19a7.htm - Generated by SEC Publisher for SEC Filing CUSIP NO. 49226D109 13G Page 1 of 13 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 7)* Knowles Corporation (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 49226D109 (CUSIP Number) December 31, 2019 (Date of

Financial Statements and Exhibits, Other Events

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): January 24, 2020 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

Regulation FD Disclosure, Financial Statements and Exhibits

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): December 20, 2019 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission F

For immediate release Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Acquires Microphone Design Assets from ams AG ITASCA, Ill., Dec. 23, 2019 — Knowles Corporation (NYSE: KN), a m

exhibit991tokn8k122319 For immediate release Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: mike.

Knowles Corporation Deferred Compensation Plan

exhibit101tokn8k115da KNOWLES CORPORATION DEFERRED COMPENSATION PLAN Effective Date December 1, 2019 Knowles Corporation Deferred Compensation Plan ARTICLE I Establishment and Purpose .

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): October 29, 2019 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

Quarterly Report - 10-Q

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 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 September 30, 2019. or ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE OF 1934 For the transition period from to Commission File Number: 001-36102 Knowles

Financial Statements and Exhibits, Results of Operations and Financial Condition

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): October 24, 2019 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

Q3 2019 October 24, 2019 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP. In addition to the GAAP results included in this pre

exhibit992q32019 Q3 2019 October 24, 2019 Supplemental Information Non-GAAP Disclaimer The financial results disclosed in this presentation include certain measures calculated and presented in accordance with GAAP.

Knowles Reports Q3 2019 Financial Results and Provides Outlook for Q4 2019 Q3 Revenues Above Midpoint of Guidance Revenues from Non-Mobile Expected to be More Than 70 Percent of Total Sales in 2019

Exhibit 99.1 Financial Contact: Mike Knapp Knowles Investor Relations Phone: (630) 238-5236 Email: [email protected] Knowles Reports Q3 2019 Financial Results and Provides Outlook for Q4 2019 Q3 Revenues Above Midpoint of Guidance Revenues from Non-Mobile Expected to be More Than 70 Percent of Total Sales in 2019 ITASCA, Ill., Oct. 24, 2019 - Knowles Corporation (NYSE: KN), a market leader an

Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers; Compensatory Arrangements of Certain Officers, Financial Statements and Exhibits

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): October 16, 2019 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or Other Jurisdiction of Incorporation) (Commission Fi

KN / Knowles Corp / Caligan Partners Lp - KNOWLES CORP Activist Investment

SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 13D/A INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT TO RULE 13d-1(a) AND AMENDMENTS THERETO FILED PURSUANT TO RULE 13d-2(a) Under the Securities Exchange Act of 1934 (Amendment No. 2)* Knowles Corporation (Name of Issuer) Common Stock, par value $0.01 per share (Title of Class of Securities) 49926D109 (CUSIP Number) David

Regulation FD Disclosure, Financial Statements and Exhibits

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): September 17, 2019 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or other jurisdiction of incorporation) (Commission

Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995. The words “believe,” “expect,” “anticipate,” “pro

EX-99.1 Knowles Corporation 2019 Analyst & Investor Day September 17, 2019 Exhibit 99.1 Forward Looking Statements This presentation contains forward-looking statements within the meaning of the safe harbor provisions of the United States Private Securities Litigation Reform Act of 1995. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “m

Temporary Suspension of Trading Under Registrant's Employee Benefit Plans, Financial Statements and Exhibits

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): September 11, 2019 Knowles Corporation (Exact name of registrant as specified in its charter) Delaware 001-36102 90-1002689 (State or other jurisdiction of incorporation) (Commission