Big data has become one of the most invaluable assets in the global economy. Due to its high value, businesses naturally try to expand their data pools by way of acquiring data from other businesses through M&A. Given various data-related regulations from country to country (eg, data privacy, cybersecurity and intellectual property), it is critical to review M&A transactions from a data law perspective during the stage of due diligence, drafting transaction documents (especially representations and warranties), closing and post-merger integration (PMI). Reason: we have seen many M&A transactions that have not considered data law in full. In South Korea, many Korean M&A experts and data experts would be interested in other countries’ practice.