Mr. Freeman, who has pleaded guilty, is expected to testify as early as Friday.
Henri Steenkamp, the global chief financial officer, will testify as well.
Radomski will also testify, as will Brian McNamee, a former Radomski associate.
Mr. LaHood is expected to testify, as is Yoshimi Inaba, the chief executive of Toyota's North American operations.
Mr. McDonald, who has pleaded guilty, is also scheduled to testify, as is Mr. Gulotta, who has not been implicated.
Mr. Gelsinger's father, Paul, will testify, as will officials from the Food and Drug Administration and the health institute.
Some of Fisker's top executives involved in the Karma's development are expected to testify, as well as agency officials involved in the loan program.
Vassallo, who is still working for Kleiner as a strategic advisor, is set to testify as early as this afternoon, Exelrod said.
Wilpon and Katz could testify, as well as a variety of family members and business associates.
Prosecutors, however, have often seen refusals to testify as attempts to hinder investigations.
The commission insisted Mr Marcos was simply being forced to testify as a "hostile" witness.
