| SC 13G/A | 2019-01-31 | BlackRock Inc. | LYDALL INC /DE/ | 2,566,100 | 14.7% | EDGAR |
| SC 13G/A | 2018-02-21 | Champlain Investment Partners, LLC | LYDALL INC /DE/ | 1,363,315 | 8.0% | EDGAR |
| SC 13G/A | 2018-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | LYDALL INC /DE/ | 1,268,803 | 7.3% | EDGAR |
| SC 13G/A | 2018-02-13 | Champlain Investment Partners, LLC | LYDALL INC /DE/ | 1,363,315 | 7.9% | EDGAR |
| SC 13G/A | 2018-02-09 | VANGUARD GROUP INC | LYDALL INC /DE/ | 934,172 | 5.4% | EDGAR |
| SC 13G/A | 2018-02-09 | DIMENSIONAL FUND ADVISORS LP | LYDALL INC /DE/ | 1,009,106 | 5.8% | EDGAR |
| SC 13G/A | 2018-01-19 | BlackRock Inc. | LYDALL INC /DE/ | 2,169,014 | 12.6% | EDGAR |
| SC 13G/A | 2017-02-14 | Champlain Investment Partners, LLC | LYDALL INC /DE/ | 928,645 | 5.4% | EDGAR |
| SC 13G | 2017-02-10 | VANGUARD GROUP INC | LYDALL INC /DE/ | 902,825 | 5.3% | EDGAR |
| SC 13G/A | 2017-02-09 | DIMENSIONAL FUND ADVISORS LP | LYDALL INC /DE/ | 1,366,495 | 8.0% | EDGAR |
| SC 13G | 2017-02-07 | PRICE T ROWE ASSOCIATES INC /MD/ | LYDALL INC /DE/ | 931,660 | 5.4% | EDGAR |
| SC 13G/A | 2017-01-12 | BlackRock Inc. | LYDALL INC /DE/ | 1,909,451 | 11.1% | EDGAR |
| SC 13G/A | 2016-12-09 | BlackRock Inc. | LYDALL INC /DE/ | 1,823,855 | 10.6% | EDGAR |
| SC 13G/A | 2016-03-17 | Champlain Investment Partners, LLC | LYDALL INC /DE/ | 1,030,085 | 6.2% | EDGAR |
| SC 13G | 2016-02-11 | Champlain Investment Partners, LLC | LYDALL INC /DE/ | 1,030,085 | 6.0% | EDGAR |
| SC 13G/A | 2016-02-09 | PRICE T ROWE ASSOCIATES INC /MD/ | LYDALL INC /DE/ | 616,090 | 3.6% | EDGAR |
| SC 13G/A | 2016-02-09 | DIMENSIONAL FUND ADVISORS LP | LYDALL INC /DE/ | 1,446,965 | 8.5% | EDGAR |
| SC 13G/A | 2016-01-26 | BlackRock Inc. | LYDALL INC /DE/ | 1,465,017 | 8.6% | EDGAR |
| SC 13G/A | 2015-02-10 | PRICE T ROWE ASSOCIATES INC /MD/ | LYDALL INC /DE/ | 1,258,810 | 7.3% | EDGAR |
| SC 13G/A | 2015-02-05 | DIMENSIONAL FUND ADVISORS LP | LYDALL INC /DE/ | 1,422,229 | 8.3% | EDGAR |