X0306 4 2017-03-07 0001587523 Knowles Corp KN 0001598091 Cabrera Raymond D. C/O KNOWLES CORPORATION 1151 MAPLEWOOD DRIVE ITASCA IL 60143 1 Senior VP, HR & CAO Common Stock 2017-03-07 4 F 0 463 18.33 D 46621 D Common Stock 2017-03-07 4 F 0 1732 18.33 D 44889 D These shares represent the payment of the tax liability by withholding securities incident to the vesting of an annual restricted stock grant issued on March 7, 2014 in accordance with Rule 16b-3. These shares represent the payment of the tax liability by withholding securities incident to the vesting of a founders restricted stock grant issued on March 7, 2014 in accordance with Rule 16b-3. /s/ Mark Pacioni, attorney-in-fact 2017-03-08