5 Best Small-Cap Data Center Cooling Stocks to Buy

2. Willdan Group, Inc. (NASDAQ:WLDN)

Number of Hedge Funds: 31

Willdan Group, Inc. (NASDAQ:WLDN) is one of the best small-cap data center cooling stocks to Buy. On June 1, Willdan released its June investor presentation, highlighting data-center siting and load forecasting, substation and grid design, building and energy-efficiency upgrades, and infrastructure construction support as parts of its integrated consulting, engineering, and implementation platform. The data-center cooling angle comes through efficiency and systems optimization rather than direct liquid-cooling hardware. Willdan says it works with mission-critical campuses where power and heat interact, and its data-center services include engineering, energy assessments, controls integration, procurement, and construction management.

The company also cites data-center projects where it optimized cooling systems, adjusted setpoints, improved controls, and reduced energy use, including an Evoque Data Centers project that generated 1.5 million kWh of annual savings. In AI data centers, cooling and power are increasingly connected operating constraints, so Willdan’s work in energy efficiency, utility interconnection, load forecasting, and facility systems gives it practical services-level exposure to the thermal-management problem.

Willdan Group, Inc. (NASDAQ:WLDN) provides technical, engineering, energy-efficiency, infrastructure, and consulting services to utilities, public agencies, and commercial and industrial customers.