436 filings
Page 7 of 22
DEFA14A
ifed5idz3qsjpjze
12 May 16
Additional proxy soliciting materials
12:00am
SD
uw93lv8p
2 May 16
Conflict minerals disclosure
12:00am
8-K
pq2faii
28 Apr 16
Results of Operations and Financial Condition
12:00am
DEFA14A
1x501i6
20 Apr 16
Additional proxy soliciting materials
12:00am
8-K
91uo22f6ors10l
18 Apr 16
Financial Statements and Exhibits
12:00am
8-K
jfm658
21 Mar 16
Financial Statements and Exhibits
12:00am
8-K
ch1e8xse
25 Feb 16
Results of Operations and Financial Condition
12:00am
8-K
4mm2 u8o5vao
18 Dec 15
Departure of Directors or Certain Officers
12:00am
8-K
uhd2sz29ol8vqubj
7 Dec 15
Mine Safety - Reporting of Shutdowns and Patterns of Violations
12:00am
8-K
yh7n6r6
30 Oct 15
Steven B. Schwarzwaelder Elected to the Board of Directors
12:00am
8-K
uxr8no 59
29 Oct 15
Results of Operations and Financial Condition
12:00am
8-K
rptloac3qf4znbf
14 Oct 15
Departure of Directors or Certain Officers
12:00am
8-K
lfkoo kf7p5j5
30 Jul 15
Results of Operations and Financial Condition
12:00am
SD
2h029azo
21 Jul 15
Conflict minerals disclosure
12:00am
8-K
0rvih09y
15 Jun 15
Submission of Matters to a Vote of Security Holders
12:00am