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Form 8-K · Current Report · Filed 2026-06-09

Sterling Infrastructure Acquires Stone Ridge Contracting to Expand Pacific Northwest Footprint

Sterling Infrastructure, Inc. has completed the acquisition of Stone Ridge Contracting, LLC., a Pocatello, Idaho-based site development contractor. This acquisition strengthens Sterling's E-Infrastructure geographic footprint across the Pacific Northwest and Texas. Stone Ridge is expected to generate full-year 2026 revenue in the range of $180 million to $200 million and EBITDA margins in the mid-teens. The purchase price is within Sterling's typical range for site development assets, consisting of a combination of cash and Sterling common stock, with an earn out opportunity contingent upon meeting certain EBITDA targets by December 31, 2031. Sterling plans to update its full year 2026 financial guidance to reflect the partial year contribution from Stone Ridge.

Filer
Sterling Infrastructure Inc. STRL · NASDAQ
Filed
Accession
0000874238-26-000087
CIK
0000874238
Signal
High impactIndustrials

Items reported

Item events

Reported Item

M&A Transaction Strategic Partnership Corporate Update

Market reaction

Close before filing

$891.86

Next session

-13.6%

Since filing

-33.1%

Latest close

$596.77

What happened, not what will happen — closing prices around the filing date.

Precedent

Previous filings from STRL reporting the same item, with the next session's move:

Insider tape

Within 45 days of this filing, STRL insiders reported 11 Form 4 transactions — net selling of $2.6M.

Full STRL insider history →

About Sterling Infrastructure Inc.

Sterling Infrastructure Inc. is a diversified infrastructure services company primarily focused on heavy civil engineering and construction services throughout the United States. This enterprise specializes in the development of transportation and water infrastructure, site development, and remediating hazardous waste sites. With operations encompassing key areas such as highways, bridges, railways, airports, and water containment and treatment facilities, Sterling Infrastructure Inc. plays a crucial role in bolstering the nation's foundational framework. The company's projects often involve collaborations with public sector entities, reflecting its significance in executing large-scale initiatives vital to urban development and environmental sustainability. As a company listed on a major stock exchange, Sterling Infrastructure Inc. is pivotal within the construction and engineering sectors, addressing both commercial and government needs and contributing substantially to economic growth and regional connectivity.

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