amalgamation
From Longman Business Dictionaryamalgamationa‧mal‧ga‧ma‧tion /əˌmælgəˈmeɪʃən/ noun [countable, uncountable] when two or more organizations amalgamate, often in order to increase profits by cutting coststhe amalgamation of the regional sales operations into one national salesforceThere are plans for the reorganization of the industry, including amalgamations and some closures. → horizontal amalgamation → vertical amalgamation