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)

(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)

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


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.

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