Duff & Phelps Utility and Infrastructure Fund Inc. Discloses Sources of Distribution – Section 19(a) Notice

CHICAGO--(BUSINESS WIRE)--The Board of Directors of Duff & Phelps Utility and Infrastructure Fund Inc. (NYSE: DPG), a closed-end fund advised by Duff & Phelps Investment Management Co., previously announced the following monthly distribution on September 18, 2025:

Per Share Amount	Ex-Date	Record Date	Payable Date
$0.07	October 31, 2025	October 31, 2025	November 10, 2025

The Fund adopted a managed distribution plan (the “Plan”) in 2015. Under the Plan, the Fund will distribute all available investment income to its shareholders, consistent with the Fund’s investment objective. If and when sufficient investment income is not available on a monthly basis, the Fund will distribute realized capital gains and/or return of capital to its shareholders in order to maintain the monthly $0.07 per share distribution level.

The following table sets forth the estimated amounts of the Fund’s October 2025 distribution to shareholders of record at the close of business on October 31, 2025 (ex-date October 31, 2025), payable November 10, 2025, together with the cumulative distributions paid from the first day of the fiscal year to this month end from the following sources. All amounts are expressed per share of common stock based on U.S. generally accepted accounting principles which may differ from federal income tax regulations.

Distribution Estimates	October 2025 (MTD)				Fiscal Year-to-Date (YTD)^(1)
(Sources)	Per Share Amount		Percentage of Current Distribution		Per Share Amount		Percentage of Current Distribution
Net Investment Income	$	0.000	0.0	%	$	0.225	26.8	%
Net Realized Short-Term Capital Gains		0.000	0.0	%		0.027	3.2	%
Net Realized Long-Term Capital Gains		0.070	100.0	%		0.588	70.0	%
Return of Capital (or other Capital Source)		0.000	0.0	%		0.000	0.0	%
Total Distribution	$	0.070	100.0	%	$	0.840	100.0	%
^(1)Fiscal year started November 1, 2024.

As of September 30, 2025
Average annual total return on NAV for the 5 years	13.57%
Annualized current distribution rate as a percentage of NAV	5.89%
Cumulative total return on NAV for the fiscal year	17.96%
Cumulative fiscal year distributions as a percentage of NAV	5.40%

The Fund will issue a separate 19(a) notice at the time of each distribution using the most current financial information available. You should not draw any conclusions about the Fund’s investment performance from the amount of these distributions or from the terms of the Plan.

The amounts and sources of distributions reported in this notice are only estimates and are not being provided for tax reporting purposes. The actual amounts and sources of the amounts for tax reporting purposes will depend upon the Fund’s investment experience during the remainder of the fiscal year and may be subject to changes based on tax regulations. The Fund or your broker will send you a Form 1099-DIV for the calendar year that will tell you how to report these distributions for federal income tax purposes.

About the Fund

Duff & Phelps Utility and Infrastructure Fund Inc. is a closed-end investment management company whose investment objective is to seek total return, resulting primarily from (i) a high level of current income, with an emphasis on providing tax-advantaged dividend income and (ii) growth in current income, and secondarily from capital appreciation. The Fund seeks to achieve these objectives by investing primarily in equities of domestic and foreign utilities and infrastructure providers. Under normal market conditions, the Fund will invest at least 80% of its total assets in dividend-paying equity securities of companies in the utility industry and the infrastructure industry. The utility industry is defined to include the following sectors: electric, gas, water, telecommunications, and midstream energy. The infrastructure industry is defined as companies owning or operating essential transportation assets, such as toll roads, bridges, tunnels, airports, seaports, and railroads. For more information, contact shareholder services at [phone], by email at [e-mail], or visit the DPG website, dpimc.com/dpg.

About the Investment Adviser

Duff & Phelps Investment Management Co. is a boutique investment manager that specializes in listed real asset strategies for institutional and individual clients. An investment manager of Virtus Investment Partners, Inc. (NYSE: VRTS), the firm began in 1932 as a fundamental research firm and has been managing assets since 1979. The firm seeks to provide specialty investment strategies that enhance client outcomes through active portfolio management and customized solutions, utilizing a process with values that include quality, reliability, and specialization. Investment strategies include U.S. and global real estate securities, global listed infrastructure, energy infrastructure, water, and clean energy. For more information visit dpimc.com.