"I know absolutely nothing" about the report, Trudeau said in an interview with CBC chief correspondent Peter Mansbridge that aired on The National.
Trudeau had announced Wednesday morning that the former Liberal senators will sit as Independents, and they will have no formal ties to the Liberal parliamentary machinery except through friendships.
Auditor General Michael Ferguson is currently reviewing the Senate's spending, leading the Conservatives to suggest Trudeau's move is meant to distance the party from Ferguson's findings.
Trudeau told Mansbridge he made the change to show that the Senate could be made better without reopening the Constitution.
Watch the complete interview in the video above.