Madison Funds DEFA14A Additional proxy soliciting materials

Madison High Income Fund

SPECIAL MEETING OF SHAREHOLDERS

IMPORTANT SHAREHOLDER INFORMATION

Please vote promptly

VOTING IS QUICK AND EASY

Dear Shareholder: We recently sent you proxy materials concerning an important proposal regarding your investment, which will be considered at the Special Meeting of Shareholders at 10:30 a.m. Central time on September 2, 2020, at the offices of Madison Asset Management, LLC located at 550 Science Drive, Madison, Wisconsin 53711. This letter was sent to you because you held shares on the record date and we have not received your vote. Your vote is critical to this process. Please vote prior to the Special Meeting on September 2, 2020. Thank you for your prompt attention to this matter. If you have already voted, we appreciate your participation. Sincerely, /s/ Holly S. Baggot Holly S. Baggot Secretary of Madison Funds