Executives made calls and exchanged emails but say the decisions were made due to several factors.
His comments came after Loblaws, Metro and Sobey's all reversed pay premiums for employees.
Grocers have been paying employees an extra $2 per hour since mid-March.
The company says it wants to reduce the amount of single-use packaging it sells.
The free daily newspaper Metro will be renamed StarMetro.
We are assessing all of our options."
Many companies have denied any wrongdoing.
The grocery store chains said they are fully co-operating.
The Montreal-based company declined for competitive reasons to provide details.