The Securities and Exchange Commission is drafting a proposal that would restrict plans that corporate insiders use to avoid insider-trading claims when buying or selling their own company’s stock.

Speaking Monday at The Wall Street Journal’s CFO Network event, SEC Chairman Gary Gensler said he is seeking to revise rules that govern the arrangements, known as 10b5-1 plans. Insiders set up plans ahead of time and use them to schedule future trades. The arrangement gives executives a defense against insider-trading claims that would stem from having undisclosed material nonpublic information at the time of a trade. READ MORE