You can export a list of the connections you have made on LinkedIn at any time.

To export LinkedIn connections:

• Click the Me icon at the top of your LinkedIn homepage.

• From the dropdown select Settings & Privacy.
• Click the Privacy tab.
• Scroll down to the How LinkedIn uses your data section, then find and expand the Getting a copy of your data sub-section.
  • Select Want something in particular? Select the data files you're most interested in, and then tick Connections
  • Click Request archive
  • Enter your password as prompted, then click Done

You will receive an email to your primary email address which will include a link where you can download your list of connections.