Culper Research said it is "again short Archer Aviation. "We have not commented publicly on Archer for some time, but we believe the Company continues to mislead investors, and may also now have Reg FD problems," Culper said, adding that "flight logs suggest $ACHR has not engaged in a single ground or air test for the past 3 months. Further, $ACHR doesn't appear to have obtained an airworthiness certificate for N704AX - they couldn't fly it even if they wanted to... At the same time, a recent Glassdoor review alleges that $ACHR 'hasn't even finalized the aircraft design' and 'is willing to break safety regulations and put people in danger.'"