A corporate action is an event in a company that may – but not necessarily – have an impact on the share price of the company. Examples of corporate actions are mergers, issues, conversions, stock splits, spin offs, exercise of warrants etc. 

Corporate action information is updated periodically. 

Nasdaq Copenhagen - Corporate Actions

In addition corporate actions, the file for download below contains information about new investment funds on the stock market as well as changes in already listed investment funds.