In this thesis, I analyze 857 mergers and acquisitions that satisfy two conditions: the transactions must have been completed between 2010 and 2020 and the company seeking the acquisition must be listed on the Brazilian Stock Exchang, B3. Using this sample, I seek to determine if there is an empirical relation between a company s age and its decision to acquire another company. The main findings is that firms are less likely to acquire other firms, as they get older. On average, public firms that buy other firms are 34 years old and they have been listed for 10 years. In the full sample, public firms are, on average, 37 years old, and they have been listed for nine years. Logit regressions confirm that younger public firms are more likely to buy other firms. The Logit regressions also show that public firms are more likely to buy other firms if the former are bigger, more profitable, more liquid, and less leveraged. These financial characteristics become more important for the acquisition decision, though, as they mature.