The only companies obligated to inform of involvement in such investigations are publicly traded entities as a part of their communications with investors.
So, if Citron is being investigated - it may not know about it and, if it it aware, it does not have any obligation to mention it.
As a matter of fact, unless a company is obligated to inform its own investors by law, investigative bodies forbid and prohibit any targets of investigation to mention one exists until the case is publicized by the authorities in charge.
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