In 2011, SidusHQ CEO Jung Hoon-tak was accused of illegally using Jun's bank account to pocket profits from a merger and acquisition. Jung allegedly made after purchasing a stake in the junior KOSDAQ-listed Stom E&F in 2009 with an account under Jun's name and announcing through a public filing several months later that he would buy Stom E&F. Jung and Stom E&F's former CEO Kwon Seung-shik were reported for gaining unfair profits by leaking information on the M&A beforehand. In an investigation by the Financial Supervisory Service, Jun testified that she was unaware of such an account existing under her name. Jung issued a denial.