60 results
Page 3 of 3
8-K
EX-99.1
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7 May 10
Koppers Holdings Inc. Reports First Quarter 2010 Results
12:00am
8-K
EX-99.1
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4 Sep 09
Other Events
12:00am
DEF 14A
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30 Mar 07
Definitive proxy
12:00am
10-K
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21 Mar 06
Annual report
12:00am
424B1
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2 Feb 06
Prospectus with pricing info
12:00am
424B3
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27 Apr 05
Prospectus supplement
12:00am
S-4/A
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18 Apr 05
Registration of securities issued in business combination transactions (amended)
12:00am
S-4
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14 Feb 05
Registration of securities issued in business combination transactions
12:00am