South Korean prosecutors raided Samsung Electronics’ headquarters as part of an insider trading investigation connected to the tech giant’s multimillion-dollar acquisition of Rainbow Robotics, a KOSDAQ-listed robotics company founded by researchers from the Korea Advanced Institute of Science and Technology.
The Seoul Southern District Prosecutors’ Office executed the raids on March 18, 2026, targeting both Samsung’s facilities in Suwon and Rainbow Robotics’ headquarters in Daejeon. The probe centers on 16 individuals, including Rainbow Robotics’ current CEO, identified as Lee, and the company’s former CFO, identified as Bang.
What prosecutors are alleging
The investigation focuses on trades of Rainbow Robotics shares made between 2022 and 2024, a period during which Samsung was steadily building its position in the company. Prosecutors allege the suspects used non-public information about the acquisition to trade Rainbow Robotics stock before details became public.
The illicit profits from these trades are estimated at 3 to 4 billion won, roughly $2 million to $2.8 million.
