The companyfiled a request to “immediately withdraw” the proposal on Friday evening butdid not tell securities regulators why it was pulling the plug.

When contactedby TradeWinds an attorney with Simpson Thacher &Bartlett, one of the law firms hired to oversee the application process,said APT is “exploring other options” but declined to elaborate further.

As we reportedthe company, which is backed by the Blackstone Group and Cerberus Capital, waslooking to raise up to $172.5m