Nvidia shares tumble over 8% in after-hours trading as reports emerge of the board considering CEO Jensen Huang's removal amid controversies surrounding his personal relationships and corporate governance concerns. Shares of Nvidia plunged more than 8% in after-hours trading on Wednesday following reports that the chipmaker's board was considering removing co-founder and CEO Jensen Huang amid controversy surrounding his personal relationships. Nvidia shares fell 8.6%, or $14.95, to $158.