三峰环境：控股股东德润环境已累计增持约2100.89万股公司股份

Group 1 - The core point of the article is that Sanfeng Environment (601827.SH) announced a share buyback plan by its controlling shareholder, Derun Environment, which has already increased its stake in the company by approximately 21.0089 million shares, accounting for about 1.26% of the total share capital [1] - The total amount spent on the share buyback by Derun Environment is approximately RMB 177.437 million [1] - Derun Environment plans to continue to increase its stake in the company based on this buyback plan [1]