VLDR - Pixelworks and CleanSpark among top tech gainers for the day August, 23 2021 03:00 PM Velodyne Lidar Inc. Gainers: Pixelworks (NASDAQ:PXLW) +24%. CleanSpark (NASDAQ:CLSK) +18%. Meta Materials (NASDAQ:MMAT) +17%. Velodyne Lidar (NASDAQ:VLDR) +17%. CooTek (NYSE:CTK) +14%. For further details see: Pixelworks and CleanSpark among top tech gainers for the day