Pattern Energy

Pattern Energy is a US renewable energy developer, owner and operator that builds wind, solar, storage and the transmission needed to move the power. Its largest project to date is SunZia, financed at roughly $11 billion in December 2023 as a single package combining a 3,515 MW New Mexico wind farm with a 550-mile, 3,000 MW HVDC line running to the Pinal Central Substation in Arizona on 2,162 structures across 13 counties. SunZia entered service in June 2026 after nearly two decades of permitting, route litigation and construction, and is one of the largest voltage-source HVDC installations in the country. Pattern contracts construction to firms including Quanta Services and Blattner Company.

Hunter Armistead and Mike Garland founded the company in 2009. Armistead is now chief executive, which gives Pattern something uncommon among renewable developers of its size: continuity of leadership across the entire period in which the industry went from marginal to mainstream.

The operating fleet runs to roughly 46 facilities and about 12 gigawatts of installed capacity, against a development and active-construction pipeline of around 40 gigawatts. The gap between those two numbers is the business. Most of what the company expects to own has yet to be built.

California is the clearest illustration of what an operating position at that scale means. Pattern describes itself as the state’s largest fully renewable energy company and reckons it supplies about 22 percent of California Community Choice Aggregator clean power and roughly 20 percent of the state’s clean energy needs overall. Named California-linked projects include Hatchet Ridge Wind, Ocotillo Wind, Broadview Wind and Grady Wind.

The California presence is physical as well as contractual: the global headquarters in San Francisco, a construction office in San Diego, and field offices at Ocotillo and Hatchet Ridge. Field offices at operating sites signal that the company keeps its own people on the ground after commissioning rather than handing everything to a service contractor.

The scope is unusually wide for a developer. Wind, solar and storage development are joined by transmission infrastructure, construction, asset operations, power purchase agreements and community benefits programs, that last one backed by roughly 2 billion dollars in local community payments over the life of the operating fleet.

Two recent moves expand the base: the completed acquisition of Cordelio Power, adding US and Canadian clean energy assets, and an affiliation with Solect Energy, which has completed more than 750 commercial solar projects.