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

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Pioneer Municipal High Income Fund, Inc. (MHI) and Pioneer Municipal High Income Opportunities Fund, Inc. (MIO) reported sources of distribution for April and the fiscal year. MHI had a distribution per share of $0.0350, comprising 83.7% net investment income and 16.3% return of capital. MIO had a distribution of $0.0500 per share, consisting of 83.0% net investment income and 17.0% return of capital. Investors must note that distributions may include a return of capital, which doesn't indicate investment performance.

BOSTON--(BUSINESS WIRE)-- 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	$0.0000	0.0%	$0.0000	0.0%
Return of Capital	$0.0057	16.3%	$0.0561	15.6%
Total per Common Share	$0.0350	100.0%	$0.3585	100.0%
Pioneer Municipal High Income Opportunities Fund, Inc. (NYSE: MIO)
		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	$0.0415	83.0%	$0.4859	92.8%
Net Realized Short-Term Capital Gains	$0.0000	0.0%	$0.0000	0.0%
Net Realized Long-Term Capital Gains	$0.0000	0.0%	$0.0000	0.0%
Return of Capital	$0.0085	17.0%	$0.0376	7.2%
Total per Common Share	$0.0500	100.0%	$0.5235	100.0%

Notes:

Investors should not necessarily draw any conclusions about the funds' investment performance from the amount of these distributions.

Each fund estimates that a portion of its distribution does not represent income or realized capital gains. Therefore, such portion of its distribution may be a return of capital. A return of capital may occur when some or all of the money invested in the fund is returned to the investor. A return of capital distribution does not necessarily reflect the fund's investment performance and should not be considered "yield" or "income."

The amounts and sources of distributions reported under the notice are only estimates and are not being provided for tax reporting purposes. The actual amounts and sources for tax reporting purposes will depend upon each fund's investment experience during the remainder of its respective fiscal year and may be subject to change based on tax regulations. Each fund will provide investors with a Form(s) 1099 for the calendar year that explains how to report these distributions for federal income tax purposes.

The funds are closed-end investment companies. The following funds trade on the New York Stock Exchange (NYSE) under the following symbols: MHI and MIO.

Keep in mind, distribution rates are not guaranteed. A fund’s distribution rate may be affected by numerous factors, including changes in actual or projected investment income, the level of undistributed net investment income, if any, and other factors. Closed-end funds, unlike open-end funds, are not continuously offered. Once issued, common shares of closed-end funds are bought and sold in the open market through a stock exchange and frequently trade at prices lower than their net asset value. Net Asset Value (NAV) is total assets less total liabilities divided by the number of common shares outstanding. For performance data on Amundi US’ closed-end funds, please call 800-225-6292 or visit our closed-end pricing page.

About Amundi US

Amundi US is the US business of Amundi, Europe’s largest asset manager by assets under management and ranked among the ten largest globally¹. Boston is one of Amundi’s six main global investment hubs² and offers a broad range of fixed-income, equity, and multi-asset investment solutions in close partnership with wealth management firms, distribution platforms, and institutional investors across the Americas, Europe, and Asia-Pacific.

With our financial and extra-financial research capabilities and long-standing commitment to responsible investment, Amundi is a key player in the asset management landscape. Amundi clients benefit from the expertise and advice of 5,500³ team members and market professionals in 35 countries³. A subsidiary of the Crédit Agricole group and listed on the Paris stock exchange, Amundi currently manages approximately $2.25 trillion of assets³.

Amundi, a Trusted Partner, working every day in the interest of our clients and society

www.amundi.com/us

Follow us on linkedin.com/company/amundi-us/ and twitter.com/amundi_us.

1 Source: IPE “Top 500 Asset Managers” published in June 2023, based on assets under management as of December 31, 2022.

2 Boston, Dublin, London, Milan, Paris, and Tokyo

3 Amundi data as of 12/31/2023

Amundi Distributor US, Inc., Member SIPC
60 State Street, Boston, MA 02109
©2024 Amundi Asset Management US, Inc.

View source version on businesswire.com: https://www.businesswire.com/news/home/20240501658851/en/

Shareholder Inquiries: Please contact your financial advisor or visit www.amundi.com/us.

Broker/Advisor Inquiries Please Contact: 800-622-9876

Media Inquiries Please Contact: Geoff Smith, 617-504-8520

Source: Amundi US

FAQ

What were the distribution amounts per share for MHI and MIO in April 2024?

MHI had a distribution of $0.0350 per share, while MIO had a distribution of $0.0500 per share in April 2024.

What were the sources of distribution for MHI in April 2024?

For MHI, 83.7% of the distribution was from net investment income, and 16.3% was from return of capital in April 2024.

What should investors consider about the distributions from MHI and MIO?

Investors should note that distributions may include a return of capital, which doesn't reflect the funds' investment performance.

How can investors find performance data on Amundi US' closed-end funds?

For performance data on Amundi US' closed-end funds, investors can call 800-225-6292 or visit the closed-end pricing page.