| Date | Event |
| 27-Nov-09 | Ex-Date for dividend payment of $0.09 |
| 18-Nov-09 | Coverage initiated on Arch Coal by HSBC Securities |
| 13-Nov-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 10-Nov-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 9-Nov-09 | ARCH COAL INC Files SEC form 10-Q, Quarterly Report |
| 30-Oct-09 | ARCH COAL INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 30-Oct-09 | Earnings announcement |
| 21-Oct-09 | Price hit new 52-week high ($25.86) |
| 20-Oct-09 | Price hit new 52-week high ($25.79) |
| 1-Oct-09 | ARCH COAL INC Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 10-Sep-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 28-Aug-09 | ARCH COAL INC Files SEC form 8-K, Entry into a Material Definitive Agreement, Financial Statements and Exhibits |
| 28-Aug-09 | Ex-Date for dividend payment of $0.09 |
| 27-Aug-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 21-Aug-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 7-Aug-09 | ARCH COAL INC Files SEC form 10-Q, Quarterly Report |
| 31-Jul-09 | ARCH COAL INC Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 29-Jul-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 28-Jul-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 27-Jul-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 24-Jul-09 | ARCH COAL INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 28-May-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 13-May-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 8-May-09 | ARCH COAL INC Files SEC form 10-Q, Quarterly Report |
| 24-Apr-09 | ARCH COAL INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 23-Apr-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 23-Mar-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 12-Mar-09 | ARCH COAL INC Files SEC form 8-K, Entry into a Material Definitive Agreement |
| 9-Mar-09 | ARCH COAL INC Files SEC form 8-K/A, Regulation FD Disclosure, Financial Statements and Exhibits |
| 9-Mar-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure, Financial Statements and Exhibits |
| 27-Feb-09 | ARCH COAL INC Files SEC form 10-K, Annual Report |
| 24-Feb-09 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 23-Feb-09 | ARCH COAL INC Files SEC form 8-K, Change in Directors or Principal Officers, Financial Statements and Exhibits |
| 30-Jan-09 | ARCH COAL INC Files SEC form 8-K, Results of Operations and Financial Condition |
| 12-Dec-08 | ARCH COAL INC Files SEC form 8-K, Change in Directors or Principal Officers |
| 10-Dec-08 | ARCH COAL INC Files SEC form 8-K, Amendments to Articles of Inc. or Bylaws; Change in Fiscal Year |
| 4-Dec-08 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 10-Nov-08 | ARCH COAL INC Files SEC form 10-Q, Quarterly Report |
| 4-Nov-08 | ARCH COAL INC Files SEC form 8-K, Regulation FD Disclosure |
| 27-Oct-08 | ARCH COAL INC Files SEC form 8-K, Results of Operations and Financial Condition, Financial Statements and Exhibits |