Recommendations for tracking 401k

What is the recommended way to track a 401k (US Retirement account)? The complications that I am having are:

  1. There are no shares or share prices reported. Instead, the reporting shows the amount of contributions and the total value only.

  2. What is the best way to account for the periodic contributions, including those that are employer matched?

I feel like the answer to this should be more obvious to me, but I am at a loss and would really appreciate if anyone could help outline the best way to go about tracking this kind of account.