If jack was to buy the stock in greenlife company, based on susan's advice about the merger, who might be liable for insider trading? neither susan nor jack. susan only. jack only. both susan and jack. if jack were to buy the stock in greenlife company, based on susan's advice about the merger, under what theory might he liable for insider trading? no theory, since he is not an insider. the tipper/tippee theory, with susan being the tipper and jack being the tippee. the misappropriation theory, since jack misappropriated the information. the tipper/tippee theory, with jack being the tipper and susan being the tippee. if susan were found to be liable for insider trading in this transaction, which of the following is true? she could be sued civilly by other shareholders who lost money because of the inside trade.