Looking at recent SEC filings by EDMC, Form 4 are filed when an "Insider" discloses a buy or sell of beneficial ownership of shares.
Seems the "Former Chancellor" of Argosy disposed of his remaining shares, 12,761 of them on Nov. 14, 2014. It's all public record.
But with the delisting, much less of this kind of information will become available. The vale of darkness continues....