Introduction Today there is a new trend in geopolitical architecture: on the one hand there are some trends in the introduction of protectionism and / or even isolationism in global processes, on the other hand global trends continue to increasingly influence economic and social activity of communities around the world. Security issues are becoming increasingly important over time and this is important not only in terms of politics and defense but also the economy. That is why it is necessary to consider new markets, especially during their formation and even unattractive from an investment point of view. This is exactly the Ukrainian market and one of the elements of improving its investment attractiveness is the intensification of mergers and acquisitions.

 Purpose The purpose of this article is to study the Ukrainian trends in the management of mergers and acquisitions in the context of national economic security. The task of the article is to study the theoretical aspects of management and planning of mergers and acquisitions and their positive impact on the economic security of the country; analyze the strategies used by enterprises in concluding such agreements; develop solutions to improve the country's economic security management system.

 Method (methodology) The following general scientific methods were used in the research process: analysis and synthesis, grouping and systematization of identifying the essence of economic security and mergers and acquisitions, their structure, principles of formation, development of the concept of diagnosing the effectiveness of investor attraction systems and control; inductions and deductions - to generalize the theoretical aspects of the peculiarities of the formation of economic security; statistical and economic - to assess the effectiveness of mergers and acquisitions.

Results The extent to which the number of mergers and acquisitions and the country's investment attractiveness, one aspect of its economic security system, is linked. Economic security must be based on an effective management system for attracting finance to the country. The systems of ranking countries by indicators of ease of doing business were analyzed. An analysis of the actions of the Ukrainian authorities to improve the economic security system in terms of improving investment attractiveness. A retrospective analysis of mergers and acquisitions by industry was conducted. According to research in this area, these processes in Ukraine are unique and unique in their own way, but they can also be taken into account when analyzing investment prospects in countries with a strong state presence in economic processes. Non-traditional sources of value creation, such as the environment, social responsibility and corporate governance, are increasingly considered and taken into account by transaction participants in strategic decision-making and financial and economic analysis, as they focus on maintaining and maximizing revenue from high valuation. value and active demand. The article analyzed several hypotheses, such as the impact of the country's ranking in the Doing Business list (World Bank Ranking), the relationship between the impact of cultural factors (language) in the region and business activity in it, which can stimulate M&A processes.The reasons for the popularity of some industries and lack of activity in other industries are identified. In general, it is established that the enterprises of the new economy are more easily integrated into the world economic space.

Aiello, R. J. and Watkins, M. D. (2000). The fine art of friendly acquisition. Harvard business review, 78(6), 100-107.

Andrieș, A. M. and Vîrlan, C. A. (2017). Risk arbitrage in emerging Europe: are cross-border mergers and acquisition deals more risky?. Economic research-Ekonomska istraživanja, 30(1), 1367-1389.

Campa, J. M. and Moschieri, C. (2008). The European M&A industry: Trends, patterns and shortcomings. IESE Business School, University of Navarra.

Carbonara, G. and Caiazza, R. (2009). Mergers and acquisitions: Causes and effects. The Journal of American Academy of Business, 14(2), 188-194.

Defrancq, C., Huyghebaert, N. and Luypaert, M. (2016). Influence of family ownership on the industry-diversifying nature of a firm’s M&A strategy: Empirical evidence from Continental Europe. Journal of Family Business Strategy, 7(4), pp.210-226.

Defrancq, C., Huyghebaert, N. and Luypaert, M. (2021). Influence of acquirer boards on M&A value creation: Evidence from Continental Europe. Journal of International Financial Management & Accounting, 32(1), 21-62.

Del Bo, C.D., Ferraris, M. and Florio, M. (2017). Governments in the market for corporate control: Evidence from M&A deals involving state-owned enterprises. Journal of comparative economics, 45(1), 89-109.

Firstbrook, C. (2007). Transnational mergers and acquisitions: how to beat the odds of disaster. Journal of Business Strategy.

Gonchar, V., Kalinin, O., Khadzhynova, O., & McCarthy, K. J. (2022). False Friends? On the Effect of Bureaucracy, Informality, Corruption and Conflict in Ukraine on Foreign and Domestic Acquisitions. Journal of Risk and Financial Management, 15(4), 179.

Huyghebaert, N. and Luypaert, M., (2013). Value creation and division of gains in horizontal acquisitions in Europe: the role of industry conditions. Applied Economics, 45(14), 1819-1833.

John, A., Lawton, T. and Meadows, M. (2018). Managing cross-border M&A: Three approaches to takeovers in Europe. The Routledge Companion to European Business, 282-294.

Kazmierska-Jozwiak, B. (2014). Activity of Central Eastern Europe Countries on mergers and acquisitions market. Social Sciences, 83(1), 72-79.

Křížová, Z., Sedláček, J. and Hýblová, E. (2014), June. Mergers and Acquisitions in the Selected Countries of Central and Eastern Europe. In Proceedings of the 11th International Scientific Conference on European Financial Systems (pp. 351-358).

Mateev, M. (2017). Is the M&A announcement effect different across Europe? More evidences from continental Europe and the UK. Research in International Business and Finance, 40, pp.190-216.

Moschieri, C. and Campa, J. M. (2014). New trends in mergers and acquisitions: Idiosyncrasies of the European market. Journal of Business Research, 67(7), pp.1478-1485.

Ritter, J. R., Signori, A. and Vismara, S. (2013). Economies of scope and IPO activity in Europe. Handbook of research on IPOs.

Schmid, A. S., Sánchez, C. M. and Goldberg, S. R. (2012). M&A today: Great challenges, but great opportunities. Journal of Corporate Accounting & Finance, 23(2), 3-8.

Verheij, D. (2019). Performance of high-tech country and sector cross border M&A acitivities in Europe.