Step 1 : Introduction to the question "Which company's stock was at the center of Martha Stewart's insider trading scandal?"
On this day in 2005, billionaire mogul Martha Stewart reported to prison to begin serving a five-month sentence for lying about a stock sale. Stewart was convicted in 2004 of conspiracy and obstruction of justice related to her selling of shares of drug maker ImClone Systems. Authorities said she used inside information of an FDA ruling against a key ImClone drug to sell shares ahead of the negative news and made false statements about it when asked. After a highly publicized jury trial, Stewart was found guilty of felony charges of conspiracy, obstruction of an agency proceeding, and making false statements to federal investigators.