KN

kn-202602050001587523false00015875232026-02-052026-02-05

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 5, 2026

Knowles Corporation (Exact name of registrant as specified in its charter)

Delaware001-3610290-1002689 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbolName of each exchange on which registered Common stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Item 2.02 Results of Operations and Financial Condition.

On February 5, 2026, Knowles Corporation issued a press release announcing its results of operations for the year and quarter ended December 31, 2025 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the year and quarter ended December 31, 2025. Knowles Corporation's quarterly financial conference call and webcast will be held on February 5, 2026. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press Release of Knowles Corporation dated February 5, 2026.

99.2

Presentation Slides dated February 5, 2026.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

KNOWLES CORPORATION

Date:February 5, 2026By: /s/ Robert J. Perna Robert J. Perna Senior Vice President, General Counsel & Secretary

kn-202510230001587523FALSE00015875232025-10-232025-10-23

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 23, 2025

Knowles Corporation (Exact name of registrant as specified in its charter)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On October 23, 2025, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended September 30, 2025 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended September 30, 2025. Knowles Corporation's quarterly financial conference call and webcast will be held on October 23, 2025. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management concerning risks and uncertainties that could cause actual outcomes or results to differ materially from those outcomes or results that are projected, anticipated, or implied in these statements, including risks, relevant factors, and uncertainties identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, subsequent Reports on Forms 10-Q and 8-K and our other filings we make with the U.S. Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press release of Knowles Corporation dated October 23, 2025.

99.2

Presentation slides dated October 23, 2025.

104Cover Page Interactive Data File (embedded within the Inline XBRL docu

kn-202507240001587523FALSE00015875232025-07-242025-07-24

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On July 24, 2025, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended June 30, 2025 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended June 30, 2025. Knowles Corporation's quarterly financial conference call and webcast will be held on July 24, 2025. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management concerning risks and uncertainties that could cause actual outcomes or results to differ materially from those outcomes or results that are projected, anticipated, or implied in these statements, including risks, relevant factors, and uncertainties identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, subsequent Reports on Forms 10-Q and 8-K and our other filings we make with the U.S. Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press release of Knowles Corporation dated July 24, 2025.

99.2

Presentation slides dated July 24, 2025.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursua

kn-202504240001587523FALSE00015875232025-04-242025-04-24

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On April 24, 2025, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended March 31, 2025 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended March 31, 2025. Knowles Corporation's quarterly financial conference call and webcast will be held on April 24, 2025. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management concerning risks and uncertainties that could cause actual outcomes or results to differ materially from those outcomes or results that are projected, anticipated, or implied in these statements, including risks, relevant factors, and uncertainties identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, subsequent Reports on Forms 10-Q and 8-K and our other filings we make with the U.S. Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press release of Knowles Corporation dated April 24, 2025.

99.2

Presentation slides dated April 24, 2025.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

kn-202502130001587523false00015875232025-02-132025-02-13

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)

Delaware001-3610290-1002689 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbolName of each exchange on which registered Common stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Item 2.02 Results of Operations and Financial Condition.

On February 13, 2025, Knowles Corporation issued a press release announcing its results of operations for the year and quarter ended December 31, 2024 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the year and quarter ended December 31, 2024. Knowles Corporation's quarterly financial conference call and webcast will be held on February 13, 2025. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

Item 7.01 Regulation FD Disclosure.

On February 13, 2025, the Company announced that its Board of Directors has approved the addition of $150 million to its existing stock repurchase program, which was first adopted in February 2020 and then increased in April 2022. As of February 13, 2025, an aggregate of approximately $194 million is available under the Company's stock repurchase program, which includes this additional authorization. A copy of the press release is being furnished as Exhibit 99.1 hereto.

The information furnished under this Item 2.02 and the related exhibits included in Item 9.01 of this Current Report on Form 8-K shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press Release of Knowles Corporation dated February 13, 2025.

99.2

Presentation Slides dated February 13, 2025.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

KNOWLES CORPORATION

Date:February 13, 2025By: /s/ Robert J. Perna Robert J. Perna Senior Vice President, General Counsel & Secretary

kn-202410240001587523FALSE00015875232024-10-242024-10-24

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On October 24, 2024, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended September 30, 2024 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended September 30, 2024. Knowles Corporation's quarterly financial conference call and webcast will be held on October 24, 2024. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management concerning risks and uncertainties that could cause actual outcomes or results to differ materially from those outcomes or results that are projected, anticipated, or implied in these statements, including risks relating to the timing and execution of the restructuring program; estimates and assumptions related to settlement of supplier obligations, the cost of severance benefits, non-cash fixed asset write-offs, and other associated costs; and other risks, relevant factors, and uncertainties identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, subsequent Reports on Forms 10-Q and 8-K and our other filings we make with the U.S. Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are fu

kn-202407310001587523FALSE00015875232024-07-312024-07-31

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On July 31, 2024, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended June 30, 2024 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended June 30, 2024. Knowles Corporation's quarterly financial conference call and webcast will be held on July 31, 2024. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management concerning risks and uncertainties that could cause actual outcomes or results to differ materially from those outcomes or results that are projected, anticipated, or implied in these statements, including risks relating to the timing and execution of the restructuring program; estimates and assumptions related to settlement of supplier obligations, the cost of severance benefits, non-cash fixed asset write-offs, and other associated costs; and other risks, relevant factors, and uncertainties identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, subsequent Reports on Forms 10-Q and 8-K and our other filings we make with the U.S. Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of

kn-202405010001587523FALSE00015875232024-05-012024-05-01

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On May 1, 2024, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended March 31, 2024 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended March 31, 2024. Knowles Corporation's quarterly financial conference call and webcast will be held on May 1, 2024. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management concerning risks and uncertainties that could cause actual outcomes or results to differ materially from those outcomes or results that are projected, anticipated, or implied in these statements, including risks relating to the timing and execution of the restructuring program; estimates and assumptions related to settlement of supplier obligations, the cost of severance benefits, non-cash fixed asset write-offs, and other associated costs; and other risks, relevant factors, and uncertainties identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, subsequent Reports on Forms 10-Q and 8-K and our other filings we make with the U.S. Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this

kn-202402070001587523false00015875232024-02-072024-02-07

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)

Delaware001-3610290-1002689 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbolName of each exchange on which registered Common stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Item 2.02 Results of Operations and Financial Condition.

On February 7, 2024, Knowles Corporation issued a press release announcing its results of operations for the year and quarter ended December 31, 2023 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the year and quarter ended December 31, 2023. Knowles Corporation's quarterly financial conference call and webcast will be held on February 7, 2024. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished under this Item 2.02 and the related exhibits included in Item 9.01 of this Current Report on Form 8-K shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press Release of Knowles Corporation dated February 7, 2024.

99.2

Presentation Slides dated February 7, 2024.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

KNOWLES CORPORATION

Date:February 7, 2024By: /s/ Robert J. Perna Robert J. Perna Senior Vice President, General Counsel & Secretary

kn-202311020001587523FALSE00015875232023-11-022023-11-02

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On November 2, 2023, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended September 30, 2023 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended September 30, 2023. Knowles Corporation's quarterly financial conference call and webcast will be held on November 2, 2023. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management concerning risks and uncertainties that could cause actual outcomes or results to differ materially from those outcomes or results that are projected, anticipated, or implied in these statements, including risks relating to the timing and execution of the restructuring program; estimates and assumptions related to settlement of supplier obligations, the cost of severance benefits, non-cash fixed asset write-offs, and other associated costs; and other risks, relevant factors, and uncertainties identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, subsequent Reports on Forms 10-Q and 8-K and our other filings we make with the U.S. Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are fu

kn-202308020001587523FALSE00015875232023-08-022023-08-02

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On August 2, 2023, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended June 30, 2023 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended June 30, 2023. Knowles Corporation's quarterly financial conference call and webcast will be held on August 2, 2023. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management concerning risks and uncertainties that could cause actual outcomes or results to differ materially from those outcomes or results that are projected, anticipated, or implied in these statements, including risks relating to the timing and execution of the restructuring program; estimates and assumptions related to settlement of supplier obligations, the cost of severance benefits, non-cash fixed asset write-offs, and other associated costs; and other risks, relevant factors, and uncertainties identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, subsequent Reports on Forms 10-Q and 8-K and our other filings we make with the U.S. Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part

kn-202304270001587523FALSE00015875232023-04-272023-04-27

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On April 27, 2023, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended March 31, 2023 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended March 31, 2023. Knowles Corporation's quarterly financial conference call and webcast will be held on April 27, 2023. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management concerning risks and uncertainties that could cause actual outcomes or results to differ materially from those outcomes or results that are projected, anticipated, or implied in these statements, including risks relating to the timing and execution of the restructuring program; estimates and assumptions related to settlement of supplier obligations, the cost of severance benefits, non-cash fixed asset write-offs, and other associated costs; and other risks, relevant factors, and uncertainties identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2022, subsequent Reports on Forms 10-Q and 8-K and our other filings we make with the U.S. Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as par

kn-202302080001587523false00015875232023-02-082023-02-08

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)

Delaware001-3610290-1002689 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbolName of each exchange on which registered Common stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Item 1.01 Entry into a Material Definitive Agreement.

On February 8, 2023, Knowles Corporation (the “Company”) entered into an Amended and Restated Credit Agreement (the “New Credit Agreement”) among the Company and one or more of its subsidiaries designated from time to time by the Company (together with the Company, the “Borrowers”), JPMorgan Chase Bank, N.A. (“JPMorgan”), as administrative agent (the “Administrative Agent”), and a syndicate of other financial institutions (the “Lenders”) named in the New Credit Agreement. The New Credit Agreement amends and restates that certain Credit Agreement dated September 4, 2020 (the “Prior Credit Agreement”), among the Borrowers, the Administrative Agent and the lenders party thereto, and provides for a senior secured revolving credit facility with borrowings in an aggregate principal amount at any time outstanding not to exceed US$400,000,000 (the “Credit Facility”).

The New Credit Agreement, among other things, extends the maturity date of the Credit Facility from January 2024 to February 2028, replaces the London Inter-Bank Offered Rate (“LIBOR”) with the term secured overnight financing rate (“Term SOFR”) as a reference rate available for borrowings, amends the minimum Interest Coverage Ratio and amends certain other financial covenants with which the Company must comply, as described below.

Borrowings under the Credit Facility are to be used for working capital and other general corporate purposes of the Borrowers.

All obligations of the Borrowers (and each subsequently organized or acquired subsidiary that becomes a borrower under the Credit Facility) will be guaranteed by the Company and the Borrowers and will be secured by a perfected pledge of all the capital stock or other equity interests (including equity interests in subsidiaries) held by the Company and the subsidiary guarantors, which pledge, in the case of equity interests in any foreign subsidiary of the Company, will be limited to 65% of the voting equity interests and all the non-voting equity interests (if any) of such foreign subsidiary.

Up to US$100,000,000 of the Credit Facility will be available in Euro, Pounds Sterling and other currencies requested by the Company and agreed to by each Lender and up to US$50,000,000 of the Credit Facility will be made available in the form of letters of credit denominated in currencies approved by the Administrative Agent and the issuing banks as requested by the Company. Undrawn amounts under the Credit Facility accrue a commitment fee at a per annum rate of 0.225% to 0.350%, based on a leverage ratio grid.

JPMorgan will make available under the Credit Facility a swingline facility under which the Borrowers may request and JPMorgan, at its discretion, may make short-term borrowings in US dollars in an aggregate amount outstanding at any time not to exceed US$20,000,000.

At any time during the term of the Credit Facility, the Company will be permitted to increase the

kn-2022102512/310001587523FALSE00015875232022-10-252022-10-25

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On October 27, 2022, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended September 30, 2022 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended September 30, 2022. Knowles Corporation's quarterly financial conference call and webcast will be held on October 27, 2022. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management concerning risks and uncertainties that could cause actual outcomes or results to differ materially from those outcomes or results that are projected, anticipated, or implied in these statements, including risks relating to the timing and execution of the restructuring program; estimates and assumptions related to settlement of supplier obligations, the cost of severance benefits, non-cash fixed asset write-offs, and other associated costs; and other risks, relevant factors, and uncertainties identified in our Annual Report on Form 10-K for the fiscal year ended December 31, 2021, subsequent Reports on Forms 10-Q and 8-K and our other filings we make with the U.S. Securities and Exchange Commission. The Company disclaims any intention or obligation to update or revise any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

Item 5.03 Amendments to Articles of Incorporation or Bylaws; Change in Fiscal Year.

kn-202207280001587523FALSE00015875232022-07-282022-07-28

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On August 2, 2022, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended June 30, 2022 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended June 30, 2022. Knowles Corporation's quarterly financial conference call and webcast will be held on August 2, 2022. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Item 2.05 Costs Associated with Exit or Disposal Activities

On July 28, 2022, Knowles committed to a restructuring program within its Audio segment designed to right size manufacturing capacity and operating expenses in its MEMS Microphones product line. This action was taken in light of the current decline in demand and the reduction in the expected future growth rate for global consumer electronics. In addition, this restructuring program furthers the Company's previously announced strategy to reduce exposure to commodity microphones and increase emphasis on high-value solutions. Estimated restructuring charges of $35-$45 million relate to settlement of supplier obligations of $19-$22 million and severance pay and benefits of $4-$6 million, which are expected to be in cash, and non-cash fixed asset write-offs of $12-$17 million. This restructuring program is expected to yield $25-$30 million of annual savings. The restructuring program is expected to be completed in the fourth quarter of 2022.

Forward Looking Statements

This Current Report on Form 8-K 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 relating to the expected impact of the Company's restructuring program, including estimates of timing and amounts of restructuring charges. The words “believe,” “expect,” “anticipate,” “project,” “estimate,” “budget,” “continue,” “could,” “intend,” “may,” “plan,” “potential,” “predict,” “seek,” “should,” “will,” “would,” “objective,” “forecast,” “goal,” “guidance,” “outlook,” “effort,” “target,” and similar expressions, among others, generally identify forward-looking statements, which speak only as of the date the statements were made. The statements in this Current Report on Form 8-K are based on currently available information and the current expectations, forecasts, and assumptions of Knowles’ management c

kn-202204280001587523FALSE00015875232022-04-282022-04-2800015875232022-04-28iso4217:USD

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On April 28, 2022, Knowles Corporation (the "Company") issued a press release announcing its results of operations for the quarter ended March 31, 2022 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended March 31, 2022. Knowles Corporation's quarterly financial conference call and webcast will be held on April 28, 2022. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

Item 7.01 Regulation FD Disclosure.

On April 28, 2022, the Company announced that its Board of Directors has approved the addition of $150 million to its existing stock repurchase program, which was first adopted in February 2020. As of April 28, 2022, an aggregate of approximately $164 million is available under the Company's stock repurchase program, which includes the additional authorization. A copy of the press release is being furnished as Exhibit 99.1 hereto.

The information furnished with the Current Report on Form 8-K and the related exhibits included in Item 9.01 shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press release of Knowles Corporation dated April 28, 2022.

99.2

Presentation slides dated April 28, 2022.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

KNOWLES CORPORATION

Date: April 28, 2022By: /s/ Robert J. Perna Robert J. Perna Senior Vice President, General Counsel & Secretary

kn-202202090001587523false00015875232022-02-092022-02-09

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)

Delaware001-3610290-1002689 (State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading symbolName of each exchange on which registered Common stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.    ☐

Item 2.02 Results of Operations and Financial Condition.

On February 9, 2022, Knowles Corporation issued a press release announcing its results of operations for the year and quarter ended December 31, 2021 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the year and quarter ended December 31, 2021. Knowles Corporation's quarterly financial conference call and webcast will be held on February 9, 2022. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished under this Item 2.02 and the related exhibits included in Item 9.01 of this Current Report on Form 8-K shall not be deemed to be “filed” for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press Release of Knowles Corporation dated February 9, 2022.

99.2

Presentation Slides dated February 9, 2022.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

KNOWLES CORPORATION

Date:February 9, 2022By: /s/ Robert J. Perna Robert J. Perna Senior Vice President, General Counsel & Secretary

kn-202110270001587523FALSE00015875232021-10-272021-10-27

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On October 27, 2021, Knowles Corporation issued a press release announcing its results of operations for the quarter ended September 30, 2021 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended September 30, 2021. Knowles Corporation's quarterly financial conference call and webcast will be held on October 27, 2021. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished under Item 2.02 and the related exhibits included in Item 9.01 of this Current Report on Form 8-K shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press release of Knowles Corporation dated October 27, 2021.

99.2

Presentation slides dated October 27, 2021.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

KNOWLES CORPORATION

Date: October 27, 2021By: /s/ Robert J. Perna Robert J. Perna Senior Vice President, General Counsel & Secretary

kn-202107280001587523FALSE00015875232021-07-282021-07-28

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On July 28, 2021, Knowles Corporation issued a press release announcing its results of operations for the quarter ended June 30, 2021 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended June 30, 2021. Knowles Corporation's quarterly financial conference call and webcast will be held on July 28, 2021. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished under Item 2.02 and the related exhibits included in Item 9.01 of this Current Report on Form 8-K shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press release of Knowles Corporation dated July 28, 2021.

99.2

Presentation slides dated July 28, 2021.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

KNOWLES CORPORATION

Date: July 28, 2021By: /s/ Robert J. Perna Robert J. Perna Senior Vice President, General Counsel & Secretary

kn-202104220001587523FALSE00015875232021-04-222021-04-22

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)

Delaware001-3610290-1002689

(State or Other Jurisdiction of Incorporation)(Commission File Number)(I.R.S. Employer Identification No.)

1151 Maplewood Drive, Itasca, IL (Address of Principal Executive Offices)

60143 (Zip Code)

Registrant's telephone number, including area code: (630) 250-5100 (Former Name or Former Address, if Changed since Last Report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each classTrading SymbolName of each exchange on which registered Common Stock, $0.01 par value per shareKNNew York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company    ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. o

Item 2.02 Results of Operations and Financial Condition.

On April 22, 2021, Knowles Corporation issued a press release announcing its results of operations for the quarter ended March 31, 2021 and posted on its website at http://investor.knowles.com presentation slides which summarize certain of its results of operations for the quarter ended March 31, 2021. Knowles Corporation's quarterly financial conference call and webcast will be held on April 22, 2021. A copy of the press release is being furnished as Exhibit 99.1 hereto and a copy of the presentation slides is being furnished as Exhibit 99.2 hereto.

The information furnished under Item 2.02 and the related exhibits included in Item 9.01 of this Current Report on Form 8-K shall not be deemed to be "filed" for purposes of the Securities Exchange Act of 1934, as amended, nor shall it be deemed incorporated by reference in any filing under the Securities Act of 1933, as amended, except as expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits.

The following exhibits are furnished as part of this report: Exhibit NumberDescription

99.1 Press release of Knowles Corporation dated April 22, 2021.

99.2

Presentation slides dated April 22, 2021.

104Cover Page Interactive Data File (embedded within the Inline XBRL document)

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

KNOWLES CORPORATION

Date: April 22, 2021By: /s/ Robert J. Perna Robert J. Perna Senior Vice President, General Counsel & Secretary