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SCHEDULE 13D/A: Simcoe Capital Management, LLC discloses a stake in Koppers Holdings Inc.

Filed: 2026-10-22 AccNo: 0000921895-26-002844 Size: 24 KB

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• SCHEDULE 13D/A: Simcoe Capital Management, LLC discloses a stake in Koppers Holdings Inc. SEC EDGAR: Schedule 13D stakes · tier A · clear net · 2026-10-22 22:28 UTC

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