Financial reports
10-Q
2001 Q3
Quarterly report
14 Nov 01
10-Q
2001 Q2
Quarterly report
14 Aug 01
10-Q
2001 Q1
Quarterly report
15 May 01
10-K
2000 FY
Annual report
10 Apr 01
NT 10-K
Notice of late annual filing
2 Apr 01
10-Q
2000 Q3
Quarterly report
14 Nov 00
10-Q
2000 Q2
Quarterly report
14 Aug 00
10-Q
2000 Q2
Quarterly report
15 May 00
10-K
1999 FY
Annual report
22 Mar 00
Current reports
8-K
Other events
27 Feb 02
8-K
Other events
18 Dec 01
8-K
Other events
19 Nov 01
8-K
Other events
30 Aug 01
8-K
Current report
1 Aug 01
8-K
Montana Power Completes Sale of Coal Business to Westmoreland
14 May 01
8-K
Current report
1 May 01
8-K
Current report
5 Mar 01
8-K
Current report
30 Jan 01
8-K
Current report
15 Nov 00
Registration and prospectus
25
Voluntary exchange delisting
28 Feb 02
25
Voluntary exchange delisting
26 Feb 02
8-A12B/A
Registration of securities on exchange (amended)
28 Jan 02
425
Business combination disclosure
7 Sep 01
SC TO-C
Information about tender offer
13 Jul 01
8-A12B/A
Registration of securities on exchange (amended)
15 Mar 99
S-8
Registration of securities for employees
22 Jul 98
424B3
Prospectus supplement
3 Apr 98
424B3
Prospectus supplement
16 Jul 97
S-3
Shelf registration
10 Jun 97
Proxies
DEFA14A
Additional proxy soliciting materials
30 Aug 01
DEFA14A
Additional proxy soliciting materials
24 Aug 01
DEFA14A
Additional proxy soliciting materials
16 Aug 01
DEFM14A
Proxy related to merger
13 Jul 01
PRER14A
Preliminary revised proxy
3 Jul 01
PRER14A
Preliminary revised proxy
2 May 01
PRER14A
Preliminary revised proxy
27 Feb 01
PREM14A
Preliminary proxy related to merger
27 Dec 00
DEF 14A
Definitive proxy
21 Mar 00
DEF 14A
Definitive proxy
24 Mar 99
Other
No filings
Ownership
11-K
Annual report of employee stock purchases
23 Jul 02
11-K
Annual report of employee stock purchases
28 Jun 96
11-K
Annual report of employee stock purchases
28 Jun 96
11-K
Annual report of employee stock purchases
28 Jun 96
11-K
Annual report of employee stock purchases
28 Jun 96
11-K
Annual report of employee stock purchases
29 Jun 95
11-K
Annual report of employee stock purchases
29 Jun 95
11-K
Annual report of employee stock purchases
29 Jun 95
11-K
Annual report of employee stock purchases
29 Jun 95
11-K
Annual report of employee stock purchases
31 Mar 94