Buyers of VW’s corporate bonds could not rely on the Affiliated Ute presumption of reliance on VW’s non-disclosure of its diesel engines’ pollution testing defeat devices because their complaint was not based solely or primarily on that omission, but instead also included allegations of multiple affirmative misrepresentations about environmental compliance and financial liabilities in its offering documents. Thus, the case was a mixed case involving both misrepresentations and omissions to which Affiliated Ute does not apply.