
Knife River Corp — Investor Relations & Filings
Knife River Corporation is a vertically integrated provider of construction materials and contracting services. The company is a major producer of aggregates, including stone, sand, and gravel, which are fundamental to infrastructure. Its primary product lines also include asphalt and ready-mix concrete for projects such as roads, driveways, and commercial buildings. In addition to material supply, Knife River offers a complete line of heavy-civil construction services, undertaking projects that range from road and bridge construction to site development for large facilities like airports and medical centers. The company's integrated model allows it to manage projects from material production to final construction.
Recent filings
| Filing | Released | Lang | Actions |
|---|---|---|---|
| 8-K | 2026-05-21 | English | |
| 8-K | 2026-05-18 | English | |
| 8-K - Knife River Corp (0001955520) (Filer) | 2026-05-05 | English | |
| ARS - Knife River Corp (0001955520) (Filer) | 2026-04-06 | English | |
| DEF 14A - Knife River Corp (0001955520) (Filer) | 2026-04-06 | English | |
| 10-K - KNIFE RIVER CORP (0001955520) (Filer) | 2026-02-20 | English |
Browse filings by year
5 years| ID | Filing | Released | Lang | Actions | |
|---|---|---|---|---|---|
|
2026
13 filings
| |||||
| 46753395 | 8-K | 2026-05-21 | English | ||
| 46465297 | 8-K | 2026-05-18 | English | ||
| 41362002 | 8-K - Knife River Corp (0001955520) (Filer) | 2026-05-05 | English | ||
| 33596836 | ARS - Knife River Corp (0001955520) (Filer) | 2026-04-06 | English | ||
| 33596579 | DEF 14A - Knife River Corp (0001955520) (Filer) | 2026-04-06 | English | ||
| 32900640 | 10-K - KNIFE RIVER CORP (0001955520) (Filer) | 2026-02-20 | English | ||
| 32900639 | 4 - KNIFE RIVER CORP (0001955520) (Filer) | 2026-02-17 | English | ||
| 32248266 | 4 Filing | 2026-02-17 | English | ||
| 32248262 | 4 Filing | 2026-02-17 | English | ||
| 32248261 | 4 Filing | 2026-02-17 | English | ||
| 32248260 | 8-K Filing | 2026-02-17 | English | ||
| 32248257 | 4 Filing | 2026-02-17 | English | ||
| 32248248 | 4 Filing | 2026-02-17 | English | ||
|
2025
2 filings
| |||||
| 13629299 | Major Shareholding Notification 2025 | 2025-11-14 | English | ||
| 13629300 | KNIFE RIVER FORM 10-Q 09-30-2025 | 2025-11-04 | English | ||
Market data
Market data not available
Price history
Peer group · Construction of roads and railways
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Knife River Corp 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/31142/ | Company identity, sector, listing, identifiers |
| GET | /api/filings/?company=31142 | 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=31142 | 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=31142 \ -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": 31142}, 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 Knife River Corp (id: 31142)"
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