| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2014-05-13 | Coliseum Capital Management, LLC | Advanced Emissions Solutions, Inc. | 1,431,590 | 6.6% | EDGAR |
| SC 13G | 2014-02-14 | WELLINGTON MANAGEMENT CO LLP | Advanced Emissions Solutions, Inc. | 646,050 | 6.0% | EDGAR |
| SC 13G/A | 2014-01-10 | BlackRock Inc. | Advanced Emissions Solutions, Inc. | 1,219,414 | 11.3% | EDGAR |
| SC 13G | 2013-08-09 | BlackRock Inc. | Advanced Emissions Solutions, Inc. | 1,184,116 | 11.8% | EDGAR |