X0609 4 2026-04-27 0 0001587523 Knowles Corp KN 0001745084 Bastarrica Air A. Jr. false 1151 MAPLEWOOD DRIVE ITASCA IL 60143 0 1 0 0 Vice President, Controller 0 Common Stock 2026-04-27 4 S 0 2262 30.68 D 55307 D Common Stock 2026-04-28 4 S 0 1962 30.26 D 53345 D Common Stock 2026-04-29 4 S 0 2153 29.96 D 51192 D By: Robyn B. Martin For: POA for Air A. Bastarrica, Jr. 2026-04-29