Have you even bothered to check why these past T12 halted stocks are no longer traded? My guess would be no. Almost every single one of them have completed a Merger or Acquisition. Ticker Company Reason No Longer Traded ATMI ATMI Inc Merger/ Acquisition STSA Sterling Financial Corporation Merger/ Acquisition HITK Hi-Tech Pharmacal Co Inc Merger/ Acquisition PACR Pacer International Inc Merger/ Acquisition CADX Cadence Pharmaceuticals, Inc. Merger/ Acquisition LEAP Leap Wireless International Merger/ Acquisition ZOLT Zoltek Companies Inc Merger/ Acquisition