Rarefied Competitors

Sensirion Holding AG (SIX: SENS), headquartered in Stäfa, Switzerland, is a global leader in sensor and sensor solutions. Since 1998, we’ve been developing reliable, high-precision sensing solutions in close, transparent collaboration with our customers and partners. Our product range includes environmental sensors for the measurement of humidity and temperature, volatile organic compounds (VOC), nitrogen oxides (Nox), carbon dioxide (CO2), formaldehyde and particulate matter (PM2.5), gas and liquid flow sensors, differential pressure sensors as well as gas leakage sensors. Designed for robustness, high performance, and long-term reliability, our solutions support demanding applications across automotive, medical, industrial, consumer, and HVAC markets. At the core of our innovation is our patented CMOSens® Technology, which integrates sensing elements and digital intelligence on a single chip. It enables top-tier performance and reflects our ambition to continuously push technological boundaries while delivering practical, reliable solutions. With over 1,200 employees in Europe, Asia and Americas, collaboration and mutual respect are at the heart of how we work. Across teams, disciplines, and regions, we foster an open, supportive culture that drives innovation and enables extraordinary results every day. Guided by fairness, honesty, and team spirit, Sensirion combines technological excellence with a collaborative mindset, creating sensor solutions that enhance health, comfort, and energy efficiency worldwide. Our global setup is strengthened by specialized subsidiaries that combine deep expertise with strong customer focus: • Sensirion Connected Solutions: Reducing emissions through continuous methane emission monitoring • Sensirion Automotive Solutions: Increasing energy efficiency, safety, and comfort in vehicles • Qmicro: High-tech solutions for gas composition analysis

IQAir is a Swiss-based air quality technology company that empowers the world to breathe cleaner air through information, collaboration and technology. With the vision of a world where everyone breathes clean air, IQAir provides individuals, organizations and communities with tools to improve air quality. Since 1963, IQAir pioneers air quality solutions that include air quality data, sensors, monitoring systems, air purification and expert services.

Airthings is a leading global technology company specializing in award-winning radon detectors and indoor air quality monitors for homes, workplaces, and schools. With a mission to empower people worldwide to understand and improve the air they breathe, Airthings offers accessible, accurate, and user-friendly solutions designed to enhance health and well-being through simple and affordable technology. Airthings has sold over 1 million devices worldwide. The company and its products have earned several accolades, including the TIME Best Inventions Award and CES Innovation Award Honor. Headquartered in Oslo, Norway, with additional offices in the United States, Airthings continues to innovate and educate on the importance of continuous indoor air quality monitoring. To learn more about careers at Airthings, visit: https://www.airthings.com/company/careers