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Form SC 13D/A MATERION Corp Filed by: GAMCO INVESTORS, INC. ET AL May 3, 2019 04:05PM
Form SC 13D/A MATERION Corp Filed by: GAMCO INVESTORS, INC. ET AL May 7, 2018 04:21PM
Form SC 13D/A MATERION Corp Filed by: GAMCO INVESTORS, INC. ET AL Aug 17, 2017 04:39PM
Form SC 13D/A MATERION Corp Filed by: GAMCO INVESTORS, INC. ET AL Apr 28, 2015 01:25PM
KeyBanc Upgrades Materion Corp. (MTRN) to Buy on Favorable Risk/Reward Mar 6, 2014 06:54AM