No / This chapter analyses the how, who, where and why of rapid rise in intra-regional investment by companies from ASEAN since 2009. The chapter analyses the push and pull factors of intra-regional investment in ASEAN, the resulting patterns of foreign direct investment (FDI) and the accompanying rise of strong regional players. The region’s FDI landscape is changing in terms of investment sources, players, FDI trends and dynamics of the region. This trend is strongly affected by stepped up efforts by ASEAN governments to encourage their national companies to invest in the region and the influence of the ASEAN Economic Community. Regional integration and emerging business opportunities are providing an impetus not seen before in driving intra-regional investment. As more ASEAN companies position and prepare for AEC 2015, this intra-regional investment wave is likely to gather force. The chapter lists the regional and global ‘footprint’ of the top 50 largest ASEAN companies by revenues. The thus identified companies include companies operating in oil and gas, mining, agri-business, telecommunications, food and beverages, manufacturing, banking, power generation, infrastructure, real estate and healthcare services.