The final meeting for creditors of MPI, Borcombe SP, Goodman Baylis, Friary Press and Premier Bookbinders and Print Finishers took place on 9 July, resulting in the companies being placed in liquidation with insolvency practitioners MCR.
However, in the final meeting report, it states that the joint administrators' investigations into the companies' affairs is ongoing.
According to the report: "The joint administrators have identified a number of transactions entered into by the directors of the companies that the administrators are currently challenging.
"The administrators cannot disclose any further details regarding these transactions as it may prejudice the ongoing action."
Any creditor that has any information they consider may assist the investigation should contact MCR.
MPI, led by Mike Dolan, had a whirlwind two years in the industry after kicking off an acquisition spree with the purchase of Borcombe in 2006.
It continued to snap up print businesses but began to unravel when MPI announced the proposed closure of Friary Press in November 2007.
Other businesses, including Butler and Tanner, closed shortly afterwards before Dolan resigned from MPI in September 2008.