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Feb 7, 2023 01:21PM Form SC 13G Mistras Group, Inc. Filed by: Vahaviolos Sotirios J.
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Feb 13, 2020 01:58PM Form SC 13G Mistras Group, Inc. Filed by: Mistras Group, Inc.
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Feb 12, 2019 09:48AM Form SC 13G/A Mistras Group, Inc. Filed by: WELLINGTON MANAGEMENT GROUP LLP
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Feb 7, 2018 05:06PM Form SC 13G/A Mistras Group, Inc. Filed by: Vahaviolos Sotirios J.
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Feb 17, 2015 04:03PM Form SC 13G/A Mistras Group, Inc. Filed by: Vahaviolos Sotirios J.
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