If you invested on Republic.co, you should be able to check your investments if you:
1. Log in
2. Hover over your click the drop-down in the top right
3. Select "My Portfolio"
4. You can then click on any of your investments to read updates.
You can also hover over the lightning bolt next to your picture, which will display all the updates for companies you follow, have invested in, etc.
Hope this helps!