---
schema_version: "secwatch.filing_event.v1"
accession: "0000874238-26-000087"
form_type: "8-K"
ticker: "STRL"
cik: "0000874238"
company_name: "STERLING INFRASTRUCTURE, INC."
filed_at: "2026-06-09T13:06:04+00:00"
generated_at: "2026-06-09T13:07:08.831395+00:00"
event_type: "m_and_a"
sentiment: "positive"
materiality_score: 0.75
calibrated_materiality_score: 0.75
confidence: "high"
source: SEC EDGAR
---

# Sterling closes acquisition of Stone Ridge Contracting; expands into Pacific Northwest

## Summary
- Deal closed June 9, 2026; Stone Ridge joins Sterling's E-Infrastructure Solutions segment.
- Purchase price includes cash and Sterling common stock plus earn-out based on 2031 EBITDA targets.
- Stone Ridge expected to generate $180-200M revenue and mid-teens EBITDA margins in 2026.
- Acquisition adds site development services across Idaho, Oregon, Washington, North Dakota, and Texas.
- Sterling to update 2026 guidance at Q2 earnings to reflect partial-year Stone Ridge contribution.

## SEC filing metadata
- accession: 0000874238-26-000087
- form_type: 8-K
- ticker: STRL
- cik: 0000874238
- company_name: STERLING INFRASTRUCTURE, INC.
- filed_at: 2026-06-09T13:06:04+00:00
- event_type: m_and_a
- sentiment: positive
- materiality_score: 0.75
- calibrated_materiality_score: 0.75
- confidence: high
- sec_items: 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/874238/000087423826000087/0000874238-26-000087-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/874238/000087423826000087/strl-20260609.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000874238-26-000087
- JSON: https://secwatch.observer/filing/0000874238-26-000087.json
- Plain text: https://secwatch.observer/filing/0000874238-26-000087.txt

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