CoolSem Technologies B.V.

Based in Eindhoven, Netherlands, CoolSem Technologies B. V. specializes in developing innovative thermal management solutions for semiconductor devices to enhance performance and reliability across various applications. CoolSem Technologies B.

V. was founded in 2025 in Eindhoven, Netherlands, focusing on advanced thermal management solutions for semiconductor devices. The company has completed one notable deal, with its most recent funding round occurring on January 19, 2026. The founder's history is not detailed in the available information, nor is there mention of any pivots in business strategy or subsidiaries.

Andre van Geelen is leading the firm as CEO as of 2026. CoolSem Technologies specializes in advanced thermal management solutions for semiconductor devices, primarily through its patented WaLTIS® wafer-level technology. This innovative platform addresses thermal resistance issues within chip substrates, improving heat conduction by up to 15 times compared to traditional materials. The WaLTIS® technology eliminates hotspots that can degrade device performance, ensuring long-term reliability across a variety of applications, including 5G/6G antenna systems, GaAs power amplifiers, and high-density power supply units for electric vehicles.

With a focus on enhancing the efficiency of wide-bandgap power conversion, CoolSem targets telecommunications, automotive, and server infrastructure markets, serving a global clientele across North America, Europe, and Asia. CoolSem Technologies has successfully secured funding to support its operations and growth, reflecting strong investor confidence in its thermal management capabilities. Its revenue model focuses on B2B transactions, partnering with manufacturers and device fabricators to integrate WaLTIS® technology into their product lines. This includes direct sales of patented thermal substrates and licensing agreements that allow clients to utilize the technology in their manufacturing processes.

Specific pricing plans for products and services are not disclosed, but partnerships are anticipated to reflect the unique value proposition of the WaLTIS® technology in improving thermal performance and reliability in semiconductor devices. In January 2026, CoolSem Technologies B. V. raised an undisclosed amount in pre-seed funding led by High-Tech Gründerfonds, alongside participation from KBC Focus Fund, BOM Brabant Ventures, and TTT Green Tech B.

V. The funding will be utilized to advance its WaLTIS thermal management technology from concept to engineering samples and support customer validation and qualification activities. CoolSem plans to launch new products designed to enhance thermal management solutions while expanding into targeted markets such as automotive and telecommunications by the end of 2026.