I eliminated my Pruco holdings and changed to Nationwide. I did not take early withdrawal but reinvested the monies. How do I report that?

It depends on how it was reported to you. 

If you received a 1099-R, you have to include it on your tax return even if it shows no taxable income. 

If you sold shares and received a 1099-B, you have to report that on your tax return as well. 

It's possible you don't have anything to report. If these investments are in any kind of qualified plan, you have nothing to report. If you did a direct rollover, you may not have anything to report. 

If you still have questions, reply with more details about your investments. Are you asking about securities in a regular brokerage account?  Are you exchanging annuities?