EX-99.(C) 6 d79889dex99c.htm REGISTRANTS NOTICES

Duff & Phelps Utility and Infrastructure Fund Inc. Section 19(a) Notice CHICAGO, June 10, 2025 – Duff & Phelps Utility and Infrastructure Fund Inc. (NYSE: DPG) declared a distribution of $0.07 per share to shareholders of record at the close of business on May 30, 2025 (ex-date May 30, 2025). The following table sets forth the estimated amounts of the Fund’s May 2025 monthly distribution and its sources, payable June 10, 2025, together with the cumulative distributions paid from the first day of the Fund’s fiscal year. 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 |  | May 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 |  | $ | 0.070 |  |  |  | 100.0% |  |  | $ | 0.107 |  |  |  | 21.8% |
Net Realized Short-Term Capital Gains |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.146 |  |  |  | 29.7% |
Net Realized Long-Term Capital Gains |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.237 |  |  |  | 48.5% |
Return of Capital (or other Capital Source) |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.000 |  |  |  | 0.0% |
Total Distribution per common share |  | $ | 0.070 |  |  |  | 100.0% |  |  | $ | 0.490 |  |  |  | 100.0% |

| (1) | Fiscal year started November 1, 2024.

As of April 30, 2025 |  |  |  |
Average annual total return on NAV for the 5 years |  |  | 13.53% |
Annualized current distribution rate as a percentage of NAV |  |  | 6.23% |
Cumulative total return on NAV for the fiscal year |  |  | 8.88% |
Cumulative fiscal year distributions as a percentage of NAV |  |  | 3.11% |

You should not draw any conclusions about the Fund’s investment performance from the amount of these distributions or from the terms of the Fund’s managed distribution 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.

Duff & Phelps Utility and Infrastructure Fund Inc. Section 19(a) Notice CHICAGO, July 10, 2025 – Duff & Phelps Utility and Infrastructure Fund Inc. (NYSE: DPG) declared a distribution of $0.07 per share to shareholders of record at the close of business on June 30, 2025 (ex-date June 30, 2025). The following table sets forth the estimated amounts of the Fund’s June 2025 monthly distribution and its sources, payable July 10, 2025, together with the cumulative distributions paid from the first day of the Fund’s fiscal year. 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 |  | June 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 |  | $ | 0.070 |  |  |  | 100.0% |  |  | $ | 0.177 |  |  |  | 31.6% |
Net Realized Short-Term Capital Gains |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.146 |  |  |  | 26.0% |
Net Realized Long-Term Capital Gains |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.237 |  |  |  | 42.4% |
Return of Capital (or other Capital Source) |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.000 |  |  |  | 0.0% |
Total Distribution per common share |  | $ | 0.070 |  |  |  | 100.0% |  |  | $ | 0.560 |  |  |  | 100.0% |

| (1) | Fiscal year started November 1, 2024.

As of May 30, 2025 |  |  |  |
Average annual total return on NAV for the 5 years |  |  | 12.24% |
Annualized current distribution rate as a percentage of NAV |  |  | 6.18% |
Cumulative total return on NAV for the fiscal year |  |  | 10.26% |
Cumulative fiscal year distributions as a percentage of NAV |  |  | 3.61% |

You should not draw any conclusions about the Fund’s investment performance from the amount of these distributions or from the terms of the Fund’s managed distribution 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.

Duff & Phelps Utility and Infrastructure Fund Inc. Section 19(a) Notice CHICAGO, August 11, 2025 – Duff & Phelps Utility and Infrastructure Fund Inc. (NYSE: DPG) declared a distribution of $0.07 per share to shareholders of record at the close of business on July 31, 2025 (ex-date July 31, 2025). The following table sets forth the estimated amounts of the Fund’s July 2025 monthly distribution and its sources, payable August 11, 2025, together with the cumulative distributions paid from the first day of the Fund’s fiscal year. 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 |  | July 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 |  | $ | 0.070 |  |  |  | 100.0% |  |  | $ | 0.247 |  |  |  | 39.2% |
Net Realized Short-Term Capital Gains |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.146 |  |  |  | 23.1% |
Net Realized Long-Term Capital Gains |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.237 |  |  |  | 37.7% |
Return of Capital (or other Capital Source) |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.000 |  |  |  | 0.0% |
Total Distribution per common share |  | $ | 0.070 |  |  |  | 100.0% |  |  | $ | 0.630 |  |  |  | 100.0% |

| (1) | Fiscal year started November 1, 2024.

As of June 30, 2025 |  |  |  |
Average annual total return on NAV for the 5 years |  |  | 12.90% |
Annualized current distribution rate as a percentage of NAV |  |  | 6.17% |
Cumulative total return on NAV for the fiscal year |  |  | 11.07% |
Cumulative fiscal year distributions as a percentage of NAV |  |  | 4.11% |

You should not draw any conclusions about the Fund’s investment performance from the amount of these distributions or from the terms of the Fund’s managed distribution 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.

Duff & Phelps Utility and Infrastructure Fund Inc. Section 19(a) Notice CHICAGO, September 10, 2025 – Duff & Phelps Utility and Infrastructure Fund Inc. (NYSE: DPG) declared a distribution of $0.07 per share to shareholders of record at the close of business on August 29, 2025 (ex-date August 29, 2025). The following table sets forth the estimated amounts of the Fund’s August 2025 monthly distribution and its sources, payable September 10, 2025, together with the cumulative distributions paid from the first day of the Fund’s fiscal year. 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 |  | August 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% |  |  | $ | 0.247 |  |  |  | 35.3% |
Net Realized Short-Term Capital Gains |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.146 |  |  |  | 20.8% |
Net Realized Long-Term Capital Gains |  |  | 0.070 |  |  |  | 100.0% |  |  |  | 0.307 |  |  |  | 43.9% |
Return of Capital (or other Capital Source) |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.000 |  |  |  | 0.0% |
Total Distribution per common share |  | $ | 0.070 |  |  |  | 100.0% |  |  | $ | 0.700 |  |  |  | 100.0% |

| (1) | Fiscal year started November 1, 2024.

As of July 31, 2025 |  |  |  |
Average annual total return on NAV for the 5 years |  |  | 11.50% |
Annualized current distribution rate as a percentage of NAV |  |  | 6.11% |
Cumulative total return on NAV for the fiscal year |  |  | 12.70% |
Cumulative fiscal year distributions as a percentage of NAV |  |  | 4.58% |

You should not draw any conclusions about the Fund’s investment performance from the amount of these distributions or from the terms of the Fund’s managed distribution 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.

Duff & Phelps Utility and Infrastructure Fund Inc. Section 19(a) Notice CHICAGO, October 10, 2025 – Duff & Phelps Utility and Infrastructure Fund Inc. (NYSE: DPG) declared a distribution of $0.07 per share to shareholders of record at the close of business on September 30, 2025 (ex-date September 30, 2025). The following table sets forth the estimated amounts of the Fund’s September 2025 monthly distribution and its sources, payable October 10, 2025, together with the cumulative distributions paid from the first day of the Fund’s fiscal year. 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 |  | September 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 |  | $ | 0.007 |  |  |  | 10.0% |  |  | $ | 0.242 |  |  |  | 31.4% |
Net Realized Short-Term Capital Gains |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.087 |  |  |  | 11.3% |
Net Realized Long-Term Capital Gains |  |  | 0.063 |  |  |  | 90.0% |  |  |  | 0.441 |  |  |  | 57.3% |
Return of Capital (or other Capital Source) |  |  | 0.000 |  |  |  | 0.0% |  |  |  | 0.000 |  |  |  | 0.0% |
Total Distribution per common share |  | $ | 0.070 |  |  |  | 100.0% |  |  | $ | 0.770 |  |  |  | 100.0% |

| (1) | Fiscal year started November 1, 2024.

As of August 29, 2025 |  |  |  |
Average annual total return on NAV for the 5 years |  |  | 11.83% |
Annualized current distribution rate as a percentage of NAV |  |  | 6.07% |
Cumulative total return on NAV for the fiscal year |  |  | 14.01% |
Cumulative fiscal year distributions as a percentage of NAV |  |  | 5.06% |

You should not draw any conclusions about the Fund’s investment performance from the amount of these distributions or from the terms of the Fund’s managed distribution 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.

Duff & Phelps Utility and Infrastructure Fund Inc. Section 19(a) Notice CHICAGO, November 10, 2025 – Duff & Phelps Utility and Infrastructure Fund Inc. (NYSE: DPG) declared a distribution of $0.07 per share to shareholders of record at the close of business on October 31, 2025 (ex-date October 31, 2025). The following table sets forth the estimated amounts of the Fund’s October 2025 monthly distribution and its sources, payable November 10, 2025, together with the cumulative distributions paid from the first day of the Fund’s fiscal year. 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 per common share |  | $ | 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% |

You should not draw any conclusions about the Fund’s investment performance from the amount of these distributions or from the terms of the Fund’s managed distribution 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.