SoundHound AI, Serve Robotics down after Nvidia dissolves stake

** Shares of Voice AI platform SoundHound AI SOUN, sidewalk delivery robots maker Serve Robotics SERV and Nano-X Imaging NNOX fall premarket after AI giant Nvidia NVDA dissolves stake in the companies

** SOUN down 10.8%, SERV falls 27.2% and NNOX down 3.8% in trading before the bell

** NVDA discloses stake of 1.7 mln shares in China's self-driving technology startup WeRide WRD and 1.2 mln shares in AI cloud firm Nebius Group NBIS

** U.S.-listed shares of WRD more than doubled to $36.78, while NBIS up 6% to $44.22 in premarket trading

** Nvidia cut its stake in Arm holdings ARM by 43.8% to 1.1 mln