Koppers Holdings Inc. — Investor Relations & Filings
Koppers Holdings Inc. is an integrated global provider of treated wood products, wood preservation chemicals, and carbon compounds. The company specializes in wood preservation technology, manufacturing pressure-treated products such as railroad crossties and utility poles for the railroad, utility, construction, and infrastructure industries. It also distills coal tar to produce carbon materials and chemicals, including carbon pitch and creosote. Koppers provides complementary services such as utility infrastructure maintenance, inspection, and environmentally responsible end-of-life management for treated wood. The company focuses on developing sustainable solutions supported by research and innovation.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| 8-K - Koppers Holdings Inc. (0001315257) (Filer) | 2026-05-11 | English | |
| 10-Q - Koppers Holdings Inc. (0001315257) (Filer) | 2026-05-08 | English | |
| 8-K - Koppers Holdings Inc. (0001315257) (Filer) | 2026-05-08 | English | |
| S-8 - Koppers Holdings Inc. (0001315257) (Filer) | 2026-05-08 | English | |
| 8-K/A - Koppers Holdings Inc. (0001315257) (Filer) | 2026-05-07 | English | |
| SCHEDULE 13G/A - Koppers Holdings Inc. (0001315257) (Subject) | 2026-03-27 | English |
Browse filings by year
17 yearsMarket data
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Price history
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Koppers Holdings Inc. via the API
Pull this company's filings, identifiers, and metadata as JSON or Markdown. Authenticate with your API key, then query by company ID, ISIN, or LEI. Full schema documented in the OpenAPI spec.
Endpoints
| GET | /api/companies/32745/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=32745 | Paginated list of all filings (filterable by type, date, language) |
| GET | /api/filings/{id}/ | Single filing — metadata, document URL, processing status |
| GET | /api/filings/{id}/markdown/ | Filing content as Markdown (PDF → text/tables/figures) |
| GET | /api/isins/?company=32745 | All ISINs registered to this company |
| GET | /api/filing-types/ | Reference: every filing-type code + category |
cURL
$ curl https://api.financialreports.eu/api/filings/?company=32745 \ -H "x-api-key: $FR_API_KEY" \ -H "Accept: application/json"
Python
import requests r = requests.get( "https://api.financialreports.eu/api/filings/", params={"company": 32745}, headers={"x-api-key": API_KEY}, ) filings = r.json()["results"]
MCP server
// MCP server URL https://mcp.financialfilings.com/mcp // Once connected, the LLM can query this company directly: "Pull the latest 5 filings for Koppers Holdings Inc. (id: 32745)"
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