The article explores how insider trading is related to companies disclosing cyberattacks. Insiders tend to sell stocks when their company keeps cyberattack information secret. However, if the company voluntarily shares the attack details, insiders are less likely to sell stocks. Managers are also less likely to withhold and sell stocks in states where data breaches must be disclosed to the state attorney general. This requirement reduces insider trading before disclosure due to higher legal risks. When disclosure rules are lax, insiders trade after withholding cyberattack information. The study shows a clear link between disclosure and insider trading behavior.