# Koppers Holdings Inc. (KOP) SEC filings and CIK

Canonical: https://sec-api.dev/companies/kop

> KOP’s SEC CIK is 0001315257 (1315257).

Insider transactions in the latest quarter: 8 (0 purchases, 7 sales). https://sec-api.dev/insider-trading/kop

| Filed | Form | Filing |
| --- | --- | --- |
| 2026-11-06 | 10-Q | https://www.sec.gov/Archives/edgar/data/1315257/000131525726000058/0001315257-26-000058-index.htm |
| 2026-11-06 | 8-K | https://www.sec.gov/Archives/edgar/data/1315257/000131525726000056/0001315257-26-000056-index.htm |

API: GET https://sec-api.dev/api/v1/filings?cik=1315257

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