Primoris Services Corporation is a publicly traded specialty construction and infrastructure company based in the United States, with a particular focus on pipelines for natural gas, wastewater and water. In 2026, the company was ranked 497th in the Fortune 500.
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History
The company was founded as ARB, Inc. in Bakersfield, California in 1960, Primoris was founded in 2004, in Nevada, as the parent company. In 2008, it was incorporated as a public company in Delaware. In 2014, it became a Fortune 1000 company.
On June 22, 2026, the company announced a major reduction to its financial forecast, which resulted in a $29.2% decline in its stock value, and multiple investigations by law firms. It also announced the departure of its COO.
Acquisitions
The company has expanded significantly through acquisitions, including:
James Construction Group LLC in 2009.
Rockford Corporation in 2010 for $82.6 million. Subsequently worked on the pipeline and underground unit of the Atlantic Coast Pipeline.
Sprint Pipeline Services, L.P. in 2012.
Q3 Contracting Inc., a gas pipeline service, in 2012 for $48.1 million in cash.
Coastal Field Services, a Beaumont, Texas pipeline and maintenance contractor, in 2017.
PLH Group, an Irving, Texas construction, maintenance and engineering services contractor, valued at $470 million, in 2022.
PayneCrest Electric, a St. Louis, Missouri electrical design, construction and maintenance company, for $422 million, in 2026.