Altair Semiconductor (formerly Sony Semiconductor Israel) is an Israeli fabless semiconductor company specializing in cellular IoT chipsets and connectivity solutions. Founded in 2005 by former Texas Instruments executives, Altair was acquired by Sony in 2016 for $212M and operated as Sony Semiconductor Israel until 2025, when it spun off back to independent operation under the Altair brand. The company develops low-power LTE and 5G chips for IoT applications including smart cities, connected vehicles, and industrial IoT.