| Type | Filed | Filer | Subject | Shares Owned | Percent Owned | |
|---|---|---|---|---|---|---|
| SC 13G | 2019-02-08 | DIMENSIONAL FUND ADVISORS LP | ARCH COAL INC | 1,001,146 | 5.3% | EDGAR |
| SC 13G/A | 2019-02-04 | BlackRock Inc. | ARCH COAL INC | 1,249,939 | 6.6% | EDGAR |
| SC 13G/A | 2019-01-14 | OPPENHEIMER DISCOVERY FUND | ARCH COAL INC | 3,616,192 | 19.2% | EDGAR |
| SC 13D/A | 2018-12-18 | Monarch Alternative Capital LP | ARCH COAL INC | 1,558,732 | 8.3% | EDGAR |
| SC 13D | 2018-12-03 | Monarch Alternative Capital LP | ARCH COAL INC | 1,558,732 | 8.3% | EDGAR |
| SC 13G/A | 2018-02-14 | PRICE T ROWE ASSOCIATES INC /MD/ | ARCH COAL INC | 5,089 | 0.0% | EDGAR |
| SC 13G/A | 2018-02-12 | VANGUARD GROUP INC | ARCH COAL INC | 1,741,666 | 7.9% | EDGAR |
| SC 13G/A | 2018-02-05 | OppenheimerFunds, Inc. | ARCH COAL INC | 3,296,987 | 15.0% | EDGAR |
| SC 13G | 2018-02-01 | BlackRock Inc. | ARCH COAL INC | 1,303,726 | 5.9% | EDGAR |
| SC 13D/A | 2017-12-12 | Monarch Alternative Capital LP | ARCH COAL INC | 618,951 | 2.9% | EDGAR |
| SC 13D/A | 2017-09-15 | Monarch Debt Recovery Master Fund Ltd | ARCH COAL INC | 1,237,035 | 5.6% | EDGAR |
| SC 13G/A | 2017-02-14 | RENAISSANCE TECHNOLOGIES LLC | ARCH COAL INC | 0 | 0.0% | EDGAR |
| SC 13G | 2017-02-09 | VANGUARD GROUP INC | ARCH COAL INC | 1,535,020 | 6.2% | EDGAR |
| SC 13G | 2017-02-06 | PRICE T ROWE ASSOCIATES INC /MD/ | ARCH COAL INC | 1,323,721 | 5.3% | EDGAR |
| SC 13G/A | 2017-01-26 | OppenheimerFunds, Inc. | ARCH COAL INC | 3,296,636 | 13.4% | EDGAR |
| SC 13D/A | 2016-11-22 | Monarch Debt Recovery Master Fund Ltd | ARCH COAL INC | 1,565,051 | 6.3% | EDGAR |
| SC 13G | 2016-11-10 | OppenheimerFunds, Inc. | ARCH COAL INC | 3,310,312 | 13.5% | EDGAR |
| SC 13D | 2016-10-17 | Monarch Debt Recovery Master Fund Ltd | ARCH COAL INC | 1,565,051 | 6.3% | EDGAR |
| SC 13G/A | 2016-02-22 | STATE STREET CORP | ARCH COAL INC | - | 0.3% | EDGAR |
| SC 13G/A | 2016-02-12 | SCHNEIDER CAPITAL MANAGEMENT CORP | ARCH COAL INC | 0 | 0.0% | EDGAR |