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Putnam U.S. Research Fund - Class Y Regulatory Documents

Effective September 30, 2025, Putnam Research Fund was renamed Putnam U.S. Research Fund and there was an addition of a new 80% investment policy. Refer to the fund’s prospectus for more information on these and other changes.

Prospectus

Summary Prospectus

Statement Of Additional Information

Annual Report

Annual Financial Statements And Other Information

Semi-Annual Report

Semi-Annual Financial Statements And Other Information

Fiscal Q1 Holdings

Fiscal Q3 Holdings