Company: SRV
Filing Date: 2025-10-22
Form Type: N-2/A
Source: 0001398344-25-019582
Chunk: 0

Company: NXG Cushing Midstream Energy Fund
Filing Date: 2025-10-22
Form: N-2/A
Chunk 0
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As filed with the Securities and Exchange Commission
on October 22, 2025

Securities Act File No. 333-286482

Investment Company Act File No. 811-22072

<div align='center'>UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM N-2</div>

| [X] Registration Statement under the Securities Act of 1933         |
| [X] Pre-Effective Amendment No. 1                                   |
| [  ] Post-Effective Amendment No.                                   |
| and/or                                                              |
| [X] Registration Statement under the Investment Company Act of 1940 |
| [X] Amendment No. 28                                                |

<div align='center'>NXG Cushing Midstream Energy Fund

NXG CUSHING ®MIDSTREAM ENERGY FUND(Registrant’s Exact Name as Specified in Charter)

One Energy Square

4925 Greenville Avenue, Suite 1310
Dallas, Texas 75206

(Address of Principal Executive Offices)

( 214) 692-6334

(Registrant’s Telephone Number, including
Area Code)

John Musgrave
Cushing® Asset Management, LP
One Energy Square

4925 Greenville Avenue, Suite 1310
Dallas, Texas 75206

(Name and Address of Agent for Service)

Copies to:

Kevin T. Hardy, Esq.

Skadden, Arps, Slate, Meagher & Flom LLP

320 South Canal Street

Chicago, Illinois 60606</div>

Approximate date of proposed public offering: From time to time after the effective date of this Registration Statement.

| [  ] | Check box if                                                                             
 the only securities being registered on this Form are being offered pursuant to dividend 
 or interest reinvestment plans.                                                          |

| [X] | Check box if any securities being registered                                          
 on this Form will be offered on a delayed or continuous basis in reliance on Rule 415 
 under the Securities Act of 1933 (“Securities Act”), other than securities offered    
 in connection with a dividend reinvestment plan.                                      |

| [X] | Check box if this Form is a registration                                             
 statement pursuant to General Instruction A.2 or a post-effective amendment thereto. |

| [  ] | Check box if                                                                                
 this Form is a registration statement pursuant to General Instruction B or a post-effective 
 amendment thereto that will become effective upon filing with the Commission pursuant to    
 Rule 462