Bain Capital has not announced anything publically regarding the acquisition of HLA. You do not have a fiduciary responsibility, your father may have one.
If one would like information as to "who" is handling th acquisition they may call Bain at:
North America
Boston Office
111 Huntington Avenue
Boston, MA 02199
Main: (617) 516-2000
Fax: (617) 516-2010
there is also an office in Newton MA.