Conglomeration has traditionally been prevalent in Asia, a trend that is currently exacerbated by the characteristics of digital markets. While conglomerates offer important benefits, from economies of scale and diversification to the development of new products, they can also have a negative impact on market dynamics. This report examines conglomeration trends in five Asian countries, Malaysia, Korea, the Philippines, Thailand, and Viet Nam, to better understand whether offline conglomerates are expanding into digital markets vis a vis the expansion of purely digital conglomerates into adjacent and non-adjacent markets. The report focuses on one of the main expansion strategies: conglomerate mergers and acquisitions. To this end, it explores the prevalence of conglomerate mergers, both globally and within the East Asia region, the type of competition scrutiny they are submitted to, and potential aspects to strengthen their review to foster more effective competition policies. The report concludes with a set of key policy recommendations that address the identified risks.