Core Viewpoint - Huicheng Vacuum (301392.SZ) reported its Q3 2025 results, highlighting significant institutional investor activity and changes in shareholding patterns [1][2]. Group 1: Institutional Investor Holdings - As of October 29, 2025, 28 institutional investors disclosed holdings in Huicheng Vacuum A-shares, totaling 19.75% of the company's total share capital, amounting to 19.75 million shares [1]. - The top ten institutional investors collectively held 18.49% of the shares, with a decrease of 3.47 percentage points compared to the previous quarter [1]. Group 2: Public Fund Activity - Eight public funds increased their holdings, with a total increase percentage of 2.84%, including notable funds such as Yongying Semiconductor Industry Mixed Fund and China Europe Digital Economy Mixed Fund [2]. - Nine public funds reported a decrease in holdings, with a total decrease percentage of 0.58%, including funds like Jin Xin Steady Strategy Mixed Fund and Bosera Silk Road Theme Stock Fund [2]. - Six new public funds disclosed their holdings this quarter, while 240 public funds were not disclosed compared to the previous quarter [2]. Group 3: Social Security Fund Changes - The National Social Security Fund 501 Portfolio was the only social security fund to report a decrease in holdings, with a reduction percentage of 0.11% [2].