The Board of Directors of DNP Select Income Fund Inc. (NYSE:DNP), a closed-end fund advised by Duff & Phelps Investment Management Co. (the "Adviser"), authorized the payment of dividends on its common stock as follows:

Per Share Amount	Ex-Date	Record Date	Payable Date
$0.065	July 31, 2025	July 31, 2025	August 11, 2025
$0.065	August 29, 2025	August 29, 2025	September 10, 2025
$0.065	September 30, 2025	September 30, 2025	October 10, 2025

The Fund adopted a Managed Distribution Plan (the "Plan") in 2007 to maintain its current 6.5 cent per share distribution rate. Under the Plan, the Fund will distribute all available investment income to its shareholders, consistent with the Fund's primary objective. If and when sufficient investment income is not available on a monthly basis, the Fund will distribute long-term capital gains and/or return of capital to its shareholders in order to maintain the 6.5 cent per share distribution level. The Fund previously provided this estimate of the sources of the May 2025 distributions:

Distribution Estimates	May 2025 (MTD)			Year-to-Date (YTD)⁽¹⁾
(Sources)	Per Share Amount		Percentage of Current Distribution	Per Share Amount		Percentage of Current Distribution
Net Investment Income	$	0.037	56.4%	$	0.136	29.7%
Net Realized Short-Term Capital Gains		0.000	0.6%		0.000	0.0%
Net Realized Long-Term Capital Gains		0.028	43.0%		0.303	66.7%
Return of Capital (or other Capital Source)		0.000	0.0%		0.016	3.6%
Total Distribution	$	0.065	100.0%	$	0.455	100.0%
(1) Fiscal year started November 1, 2024.

As of May 30, 2025
Average annual total return on NAV for the 5 years	9.59%
Annualized current distribution rate as a percentage of NAV	8.49%
Cumulative total return on NAV for the fiscal year	8.22%
Cumulative fiscal year distributions as a percentage of NAV	4.95%

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 Fund estimates that it distributed more than its income and net realized capital gains; therefore, a portion of your distribution may be a return of capital. A return of capital may occur for example, when some or all of the money that you invested in the Fund is paid back to you. A return of capital distribution does not necessarily reflect the Fund's investment performance and should not be confused with ‘yield' or ‘income'.

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

DNP Select Income Fund Inc. is a closed-end diversified investment management company whose primary investment objectives are current income and long-term growth of income. The fund seeks to achieve these objectives by investing primarily in a diversified portfolio of equity and fixed income securities of companies in the public utilities industry. For more information, contact shareholder services at (877) 381-2537, by email at duff@virtus.com, or visit the DNP website, dpimc.com/dnp.

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.

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For Further Information:

DNP Fund Services

(877) 381-2537

duff@virtus.com

DNP Select Income Fund Inc. Announces Dividends