Company: SRV
Filing Date: 2025-01-14
Form Type: 424B2
Source: 0001398344-25-000635
Chunk: 12

Company: NXG Cushing Midstream Energy Fund
Filing Date: 2025-01-14
Form: 424B2
Chunk 12
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                         | 1 Year | 3 Years | 5 Years | 10 Years |
| Total Expenses Incurred |    $60 |    $157 |    $253 |     $496 |

| * | The example should not be considered a representation                                                                                
 of future expenses or returns. Actual expenses may be higher or lower than those assumed. Moreover, the Fund’s actual rate of return 
 may be higher or lower than the hypothetical 5% return shown in the example. The example assumes that the estimated “Other           
 expenses” set forth in the Annual Expenses table are accurate and that all dividends and distributions are reinvested at net asset   
 value.                                                                                                                               |

| S-5 |

<div align='center'>CAPITALIZATION</div>

The following table sets forth the Fund’s capitalization
at May 31, 2024:

| (i) | on a historical basis; |

| (ii) | on an as adjusted basis to reflect (i) the issuance of an aggregate of 4,736 Common Shares after May 31, 2024, but prior to the date       
 of this Prospectus Supplement pursuant to the Fund’s Automatic Dividend Reinvestment Plan, (ii) the issuance of 165,363 Common Shares      
 after May 31, 2024, but prior to the date of this Prospectus Supplement, in an “at-the-market” offering pursuant to a distribution         
 agreement between the Fund and Foreside Fund Services, LLC, (iii) the issuance of an aggregate of 1,004,176 Common Shares pursuant to      
 the exercise of rights to subscribe for Common Shares in connection with the Fund’s rights offering that expired on November 14,           
 2024, and the application of the net proceeds from such issuances of Common Shares less the commissions paid and offering expenses payable 
 by the Fund in connection with such issuances and sales of Common Shares; and                                                              |

| (iii) | on an as further adjusted basis to reflect the assumed sale of 570,000 Common Shares at a price of $45.67 per share (the last       
 reported sales price of the Common Shares on the NYSE on January 9, 2025) in an offering under this Prospectus Supplement and the   
 accompanying Prospectus less the assumed commission of $0.46 (representing an estimated commission paid to the Distributor of 1.00% 
 of the gross proceeds of the sale of Common Shares in this offering) and estimated offering expenses payable by the Fund of