---
schema_version: "secwatch.filing_event.v1"
accession: "0001628280-26-030137"
form_type: "8-K"
ticker: "KNF"
cik: "0001955520"
company_name: "Knife River Corp"
filed_at: "2026-05-05T23:59:59+00:00"
generated_at: "2026-05-14T23:34:43.099431+00:00"
event_type: "earnings"
sentiment: "negative"
materiality_score: 0.65
calibrated_materiality_score: 0.65
confidence: "high"
source: SEC EDGAR
---

# Knife River Q1 net loss widens to $1.40/sh; revenue up 16% to $410M, backlog record $1.2B

## Summary
- Revenue $410.1M (+16% YoY); net loss $79.2M vs $68.7M loss in Q1 2025.
- Net loss per share $1.40 (vs $1.21 loss per share YoY); adjusted EBITDA loss $31.8M vs $38.0M loss.
- First-quarter backlog reached a record $1.2 billion.
- Completed three aggregates-based acquisitions during the quarter.
- Adjusted EBITDA margin improved to (7.8)% from (10.7)% YoY.

## SEC filing metadata
- accession: 0001628280-26-030137
- form_type: 8-K
- ticker: KNF
- cik: 0001955520
- company_name: Knife River Corp
- filed_at: 2026-05-05T23:59:59+00:00
- event_type: earnings
- sentiment: negative
- materiality_score: 0.65
- calibrated_materiality_score: 0.65
- confidence: high
- sec_items: 2.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1955520/000162828026030137/0001628280-26-030137-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1955520/000162828026030137/knf-20260505.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001628280-26-030137
- JSON: https://secwatch.observer/filing/0001628280-26-030137.json
- Plain text: https://secwatch.observer/filing/0001628280-26-030137.txt

## Key facts
- Earnings Releases
  Knife River Corp reported Three Months Ended March 31, 2026 results: revenue $ 410.1, net income $ (79.2), EPS $ (1.40).
  - Period: Three Months Ended March 31, 2026
  - Revenue: $ 410.1
  - Net income: $ (79.2)
  - EPS: $ (1.40)
  - Result: reported results
  source text: Three Months Ended March 31, (In millions, except per share) 2026 2025 % Change Revenue $ 410.1 $ 353.5 16 % Net loss $ (79.2) $ (68.7) (15) % Net loss margin (19.3) % (19.4) % Adjusted EBITDA $ (31.8) $ (38.0) 16 % Adjusted EBITDA margin (7.8) % (10.7) % Net loss per share $ (1.40) $ (1.21) (16) %
  evidence_url: https://www.sec.gov/Archives/edgar/data/1955520/000162828026030137/0001628280-26-030137-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.