Samsung accounts for about one fifth of South Korea's exports.
Over the weekend, the U.N. decided to sanction North Korea in a move backed by China.
About 30 protesters and police officers were injured in the violent clashes near the court, according to officials.
South Korea's corruption scandal, paired with President-elect Trump's comments about the country, has put the nation in a state of uncertainty.
Tensions rise on the Korean Peninsula as North Korea blocks South Korean worker access to an industrial zone along the border of the two countries.
South Korea is still recovering from an apparent cyberattack earlier this week. Government officials suspect North Korea of hacking, but is the country even capable?