This research examined the impact of Twitter acquisition. The main focus was on the stock prices of Tesla and Twitter. The time for the study was divided into three: Elon Musk initiated an acquisition of Twitter, Musk announced his intention to abandon the acquisition, and Musk became Twitter’s new owner and CEO. As one of Musk’s listed companies, Tesla is also the analysis object of the paper. The S&P 500 return was used to help obtain the return. This work analyses stock prices, annual reports, and news from Twitter and Tesla. Through descriptive statistical analysis, we get some critical conclusions. The study fills a research gap in the existing literature on Twitter acquisition.