Pioneer Closed-End Funds Required Notice to Shareholders Sources of Distribution Under Section 19(a)

The following closed-end funds reported sources of distribution for April and this fiscal year to date.

Distribution Period: April 2024

Ticker

Tax-Exempt Funds

Distribution Amount Per Share

MHI

Pioneer Municipal High Income Fund, Inc.

$0.0350

MIO

Pioneer Municipal High Income Opportunities Fund, Inc.

$0.0500

The following tables set forth estimates of the character of the current distribution and the cumulative distributions paid this fiscal year to date from the following sources: Net Investment Income; Net Realized Short-Term Capital Gains; Net Realized Long-Term Capital Gains or Return of Capital. All amounts are expressed per common share.

Pioneer Municipal High Income Fund, Inc. (NYSE: MHI)
		Percentage	Total	Percentage Make up
		Make up of	Cumulative	of Total Cumulative
	Current	Current	Distributions	Distributions
	Distribution	Distribution	Fiscal Year to Date	Fiscal Year to Date
Net Investment Income	$0.0293	83.7%	$0.3024	84.4%
Net Realized Short-Term Capital Gains	$0.0000	0.0%	$0.0000	0.0%
Net Realized Long-Term Capital Gains