Does my holding period of a stock get reset to 0 if it’s acquired by another company?

If I buy stock in a company and that company merges with another company in an all-stock reorganization (Shares of Company A are exchanged for shares of the new company), what is my holding period?

Is it:

1. Measured from the day I bought the original stock in company A or
2. Reset to the day of the merger/acquisition