CLOUD PEAK ENERGY INC. Form 424B4: Prospectus (Rule 424(b)(4))
Filings on SEC EDGAR, newest first; amendments sit with their base form. Values are as filed.
- 2010-12-17: Form 424B4; Description 424B4; Document a2201446z424b4.htm.
- 2009-11-23: Form 424B4; Description 424B4; Document a2195588z424b4.htm.
| Filed | Form | Period of report | Description | Document |
|---|---|---|---|---|
| 2010-12-17 | 424B4 | 424B4 | a2201446z424b4.htm | |
| 2009-11-23 | 424B4 | 424B4 | a2195588z424b4.htm |