X0508 4/A 2025-11-21 2025-11-24 0 0001587523 Knowles Corp KN 0001598318 Anderson John S. 1151 MAPLEWOOD DRIVE ITASCA IL 60143 0 1 0 0 Senior Vice President & CFO 1 Common Stock 2025-11-21 4 S 0 10000 20.9 D 237299 D Common Stock 2025-11-21 4 S 0 10000 20.8 D 227299 D Common Stock 2025-11-21 4 S 0 10000 21.5 D 217299 D On November 21, 2025, the reporting person filed a Form 4 which inadvertently omitted that the transactions reported were made pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 22, 2025. This amended Form 4 does not report additional transactions, but rather corrects this omission. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.67 to $21.055, inclusive. The reporting person undertakes to provide to Knowles Corporation, any security holder of Knowles Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased/sold at each separate price within the ranges set forth in this footnote to this Form 4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $20.75 to $20.89, inclusive. The reporting person undertakes to provide to Knowles Corporation, any security holder of Knowles Corporation, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares purchased/sold at each separate price within the ranges set forth in this footnote to this Form 4. By: Robyn B. Martin For: POA for John Anderson 2025-11-24