Core Insights - On November 18, several companies disclosed their shareholding changes, with 康缘药业, 超达装备, and 海大集团 announcing share buybacks, while 15 companies, including 立达信 and 艾布鲁, reported share reductions [1][2]. Group 1: Share Buybacks - 康缘药业's actual controller and director, 肖伟, increased his shareholding by 20,000 shares [2]. - 超达装备 secured a stock repurchase loan commitment from China Bank for up to 450 million yuan [2]. - 海大集团 plans to repurchase shares worth no less than 1 billion yuan and up to 1.6 billion yuan [2]. Group 2: Share Reductions - 立达信's shareholder, 李春华, intends to reduce his stake by no more than 1.56% [2]. - 艾布鲁's controlling shareholder, 钟儒波, plans to reduce his stake by no more than 3% [2]. - 高德红外's actual controller, 黄立, aims to reduce his stake by no more than 3% [2]. - 嘉美包装's shareholders plan to collectively reduce their stake by no more than 1.16% [2]. - 蓄奥规划's shareholders intend to reduce their stake by no more than 1% [2]. - 君逸数码's shareholder, 成都高创投, plans to reduce his stake by no more than 1% [2]. - 联合水务's shareholder, 上海衡联, intends to reduce his stake by no more than 0.14% [2]. - 亚翔集成's second-largest shareholder has reduced 130,000 shares and is still in the reduction period [2]. - 芯朋微's controlling shareholder, 张立新, has terminated his reduction plan early [2]. - 安旭生物's shareholder, 马华祥, plans to reduce his stake by no more than 0.94% [2]. - 农心科技's shareholder, 宁波农旗, intends to reduce his stake by no more than 0.54% [2]. - 禾川科技's actual controller and others plan to reduce their stake by no more than 6% [2]. - 世龙实业's shareholder, 电化高科, plans to reduce his stake by no more than 3% [2]. - 中国化学's executive, 聂宁新, intends to reduce his stake by no more than 60,000 shares [2]. - 鸿泉技术's shareholder, 千方科技, plans to reduce his stake by no more than 3% [2].