| SC 13G/A | 2021-02-10 | VANGUARD GROUP INC | Knowles Corp | 9,541,859 | 10.4% | EDGAR |
| SC 13G | 2021-01-25 | BlackRock Inc. | Knowles Corp | 15,411,572 | 16.8% | EDGAR |
| SC 13G/A | 2020-02-12 | VANGUARD GROUP INC | Knowles Corp | 9,471,104 | 10.3% | EDGAR |
| SC 13G/A | 2020-02-12 | DIMENSIONAL FUND ADVISORS LP | Knowles Corp | 7,374,326 | 8.1% | EDGAR |
| SC 13G/A | 2020-02-04 | FRANKLIN RESOURCES INC | Knowles Corp | 1,118,749 | 1.2% | EDGAR |
| SC 13G/A | 2020-02-04 | BlackRock Inc. | Knowles Corp | 12,838,619 | 14.0% | EDGAR |
| SC 13D/A | 2019-09-30 | Caligan Partners LP | Knowles Corp | 102,674 | 0.0% | EDGAR |
| SC 13D/A | 2019-05-09 | Caligan Partners LP | Knowles Corp | 2,030,328 | 2.2% | EDGAR |
| SC 13D | 2019-03-11 | Caligan Partners LP | Knowles Corp | 2,030,328 | 2.3% | EDGAR |
| SC 13G | 2019-02-14 | SOUTHERNSUN ASSET MANAGEMENT, LLC | Knowles Corp | 2,716,611 | 3.0% | EDGAR |
| SC 13G/A | 2019-02-11 | VANGUARD GROUP INC | Knowles Corp | 9,440,600 | 10.5% | EDGAR |
| SC 13G/A | 2019-02-08 | DIMENSIONAL FUND ADVISORS LP | Knowles Corp | 7,567,699 | 8.4% | EDGAR |
| SC 13G/A | 2019-01-31 | BlackRock Inc. | Knowles Corp | 12,831,784 | 14.2% | EDGAR |
| SC 13G/A | 2019-01-28 | FRANKLIN RESOURCES INC | Knowles Corp | 7,411,995 | 8.2% | EDGAR |
| SC 13G | 2018-12-11 | SHAPIRO CAPITAL MANAGEMENT LLC | Knowles Corp | 3,647,291 | 4.0% | EDGAR |
| SC 13G/A | 2018-07-10 | VANGUARD GROUP INC | Knowles Corp | 9,022,233 | 10.0% | EDGAR |
| SC 13G | 2018-03-09 | SHAPIRO CAPITAL MANAGEMENT LLC | Knowles Corp | 8,265,898 | 9.2% | EDGAR |
| SC 13G/A | 2018-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | Knowles Corp | 4,081,089 | 4.5% | EDGAR |
| SC 13G | 2018-02-14 | SHAPIRO CAPITAL MANAGEMENT LLC | Knowles Corp | 10,543,851 | 11.8% | EDGAR |
| SC 13G | 2018-02-14 | SOUTHERNSUN ASSET MANAGEMENT, LLC | Knowles Corp | 6,370,004 | 7.1% | EDGAR |