X0306 4 2021-12-31 0 0001587523 Knowles Corp KN 0001181355 PERNA ROBERT J 1151 MAPLEWOOD DRIVE ITASCA IL 60143 0 1 0 0 SVP, General Counsel & Sec Common Stock 2021-12-31 4 G 0 1868 0.0 D 30780 D Common Stock 2022-02-07 4 A 0 16556 0.0 A 47336 D Common Stock 2022-02-07 4 A 0 11690 21.14 A 59026 D Common Stock 2022-02-07 4 F 0 5403 21.14 D 53623 D Common Stock 2021-12-31 4 G 0 1868 0.0 A 3736 I by Trust Reporting person transferred shares of Knowles common stock to a family trust of which reporting person is a trustee. The reporting person and members of his immediate family are the sole beneficiaries of the trust. Restricted Stock Units granted under the Knowles Corporation 2018 Equity and Cash Incentive Plan that vest ratably over three years commencing on the first anniversary of the award. Represents the settlement of performance share units (PSUs) that were previously granted under the Company's Equity Incentive Plan. The ultimate amount of shares to be received under the grant depended upon the achievement of performance goals during a three-year performance period from January 1, 2019 through December 31, 2021. These shares represent the payment of the tax liability by withholding securities incident to the settlement of performance share units granted on February 19, 2019 in accordance with Rule 16b-3. By: Robyn Martin For: Robert Perna 2022-02-09