“No one informed us,” was the best explanation Panther Securities could offer on Tuesday after it suffered the indignity of having its shares suspended for failing to file its results in time for last week’s deadline.

Panther, the property investment company that was first listed publicly 75 years ago, blamed “operational reasons” for its in­ability to announce interim results for the six months to June 30 as required under disclosure transparency rules. Andrew Perloff, chairman and chief executive, said it had not been aware of the requirements.