180股筹码连续3期集中

Group 1 - The article highlights that 835 companies reported their latest shareholder numbers as of December 20, with 180 companies experiencing a continuous decline in shareholder numbers for more than three periods, indicating a trend of increasing concentration of shares [1][2] - Notable companies with significant declines in shareholder numbers include Yihau New Materials, which has seen a 37.94% decrease over 12 periods, and Zhukebo Design, with a 27.40% decrease over 11 periods [1][2] - The companies with the largest recent declines in shareholder numbers include Hewei Electric, Guoji Precision, and Dalian Heavy Industry, with decreases of 15.15%, 13.33%, and 11.90% respectively [1][2] Group 2 - Among the companies with declining shareholder numbers, 44 have seen their stock prices rise, while 135 have experienced declines, with notable gainers including Shibu Detection, Guoji Precision, and Quanyin High-Tech, which increased by 60.21%, 57.31%, and 29.84% respectively [2] - The sectors with the highest concentration of companies experiencing declining shareholder numbers include basic chemicals, machinery equipment, and pharmaceutical biology, with 24, 20, and 18 companies respectively [2] - In terms of institutional interest, 25 companies with declining shareholder numbers were surveyed by institutions in the past month, with Shengda Resources, Guoji Precision, and Baowu Magnesium receiving the most attention [2]