The list of possible delisting candidates is too long to publish here. These companies are called "non-compliant" usually for late SEC filings or stock prices which trade below the exchange minimum share price. Most of these companies can appeal and go through a process to remain listed.
The entire list is published.here. Among some of the notables:
Applied Digital Solutions (DIGA)
Children’s Place (PLCE)
Force Protection (FRPT)
Sonic Foundry (SOFO)
Sonic Solutions (SNIC)
Douglas A. McIntyre