Company: SRV
Filing Date: 2025-11-17
Form Type: 424B2
Source: 0001398344-25-021029
Chunk: 58

Company: NXG Cushing Midstream Energy Fund
Filing Date: 2025-11-17
Form: 424B2
Chunk 58
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 their distributions in cash. See “Dividend Reinvestment Plan.” |
| Listing and Symbol          | The Fund’s currently outstanding Common Shares are, and the Common Shares offered by this                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         
 Prospectus will be, subject to notice of issuance, listed on the New York Stock Exchange (the “NYSE”) under the symbol                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            
 “SRV.” As of October 14, 2025, the net asset value of the Fund’s Common Shares was $44.62  per Common Share, and the                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              
 last reported sale price for the Fund’s Common Shares on the NYSE was $44.00  per Common Share, representing a premium to net                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     
 asset value of 3.24%. In connection with any offering of Rights, the Fund will provide information in the Prospectus Supplement for                                                                                                                                                                                                                                                                                                                                                                                                                                                                               
 the expected trading market, if any, for Rights.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  |
| Special Risk Considerations | Investors should consider the specific risk factors and special considerations associated with investing in the Fund. An investment in the Fund is subject to investment risk, including the possible loss of your entire investment.                                                                                                                                                                                                                                                                                                                                                                             
 See “Risks.”                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      |
| Other Service Providers     | Under a transfer agent servicing agreement among U.S. Bancorp Global Fund Services and the Fund, U.S. Bancorp Global Fund Services serves as the Fund’s transfer agent, registrar and distribution disbursing agent. U.S. Bancorp Global Fund Services (the “Administrator”) provides the Fund with administrative services. The Administrator also performs fund accounting.                                                                                                                                                                                                                                     |
|                             | U.S. Bank National Association serves as the custodian of the Fund’s securities and other assets.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 |

<div align='center'>6

SUMMARY
OF FUND EXPENSES</div>

The following table contains information about
the costs and expenses that common shareholders will bear directly or indirectly. The table is based on the capital structure of the
Fund as of May 31, 2025 (except as noted below). The purpose of the table and the example below is to help you understand the fees
and expenses that you, as a holder of common shares, would bear directly or indirectly.

| Shareholder transaction expenses                         |     |           |
| Sales load (as a percentage of estimated offering price) |     | –%(1)     |
| Offering expenses borne by the Fund (as a percentage     
 of estimated