| SC 13G/A | 2019-02-14 | SILVERCREST ASSET MANAGEMENT GROUP LLC | US ECOLOGY, INC. | 1,406,478 | - | EDGAR |
| SC 13G/A | 2019-02-11 | VANGUARD GROUP INC | US ECOLOGY, INC. | 1,354,943 | 6.1% | EDGAR |
| SC 13G/A | 2019-01-31 | BlackRock Inc. | US ECOLOGY, INC. | 3,143,065 | 14.3% | EDGAR |
| SC 13G/A | 2018-02-14 | SILVERCREST ASSET MANAGEMENT GROUP LLC | US ECOLOGY, INC. | 1,485,946 | - | EDGAR |
| SC 13G | 2018-02-09 | VANGUARD GROUP INC | US ECOLOGY, INC. | 1,242,668 | 5.7% | EDGAR |
| SC 13G/A | 2018-01-19 | BlackRock Inc. | US ECOLOGY, INC. | 2,699,211 | 12.4% | EDGAR |
| SC 13G/A | 2017-02-14 | SILVERCREST ASSET MANAGEMENT GROUP LLC | US ECOLOGY, INC. | 1,433,473 | - | EDGAR |
| SC 13G/A | 2017-02-08 | FRANKLIN RESOURCES INC | US ECOLOGY, INC. | 1,081,194 | 5.0% | EDGAR |
| SC 13G/A | 2017-01-17 | BlackRock Inc. | US ECOLOGY, INC. | 2,407,101 | 11.1% | EDGAR |
| SC 13G/A | 2016-11-09 | BlackRock Inc. | US ECOLOGY, INC. | 2,193,049 | 10.1% | EDGAR |
| SC 13G/A | 2016-05-10 | Bares Capital Management, Inc. | US ECOLOGY, INC. | 0 | 12.0% | EDGAR |
| SC 13G/A | 2016-02-16 | Bares Capital Management, Inc. | US ECOLOGY, INC. | 1,244,284 | 5.7% | EDGAR |
| SC 13G | 2016-02-16 | SILVERCREST ASSET MANAGEMENT GROUP LLC | US ECOLOGY, INC. | 1,250,282 | - | EDGAR |
| SC 13G | 2016-02-11 | FRANKLIN RESOURCES INC | US ECOLOGY, INC. | 1,338,997 | 6.2% | EDGAR |
| SC 13G/A | 2016-02-10 | PRICE T ROWE ASSOCIATES INC /MD/ | US ECOLOGY, INC. | 405,760 | 1.8% | EDGAR |
| SC 13G/A | 2016-01-27 | BlackRock Inc. | US ECOLOGY, INC. | 2,017,498 | 9.3% | EDGAR |
| SC 13G/A | 2015-08-10 | PRICE T ROWE ASSOCIATES INC /MD/ | US ECOLOGY, INC. | 1,341,580 | 6.1% | EDGAR |
| SC 13G | 2015-02-17 | Bares Capital Management, Inc. | US ECOLOGY, INC. | 1,615,860 | 7.5% | EDGAR |
| SC 13G/A | 2015-02-12 | KILLEN GROUP INC | US ECOLOGY, INC. | 2,977,566 | 11.6% | EDGAR |
| SC 13G/A | 2015-02-11 | PRICE T ROWE ASSOCIATES INC /MD/ | US ECOLOGY, INC. | 2,453,796 | 11.3% | EDGAR |