CLOUD PEAK CORP

Q: May 31 2001

FY: Feb 28 2001

Q: Nov 30 2000

Q: Aug 31 2000

Q: May 31 2000

FY: Feb 29 2000

Q: Nov 30 1999

5

7

5

5,7

5

5

5

5

5

5

5

5

5

7

5

5

5

5

5

7

Prospectus Supplement for Delayed or Continuous Offering

Prospectus Supplement for Primary Offering

Automatic Shelf Registration

Automatic Shelf Registration

Prospectus Supplement for Primary Offering

Notice of Effectiveness

Prospectus Supplement for Delayed or Continuous Offering

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933

Prospectus Supplement for Delayed or Continuous Offering

Automatic Shelf Registration

Prospectus Supplement for Primary Offering

Registration statement under Securities Act of 1933 (amendment)

Registration statement under Securities Act of 1933

Prospectus Supplement for Delayed or Continuous Offering

Prospectus Supplement for Delayed or Continuous Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Prospectus Supplement for Primary Offering

Post-effective amendment to an automatic shelf registration statement

Post-effective amendment filed solely to add exhibits