Company: SRV
Filing Date: 2025-11-17
Form Type: 424B2
Source: 0001398344-25-021029
Chunk: 29

Company: NXG Cushing Midstream Energy Fund
Filing Date: 2025-11-17
Form: 424B2
Chunk 29
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Completed subscription certificates must be sent together
with proper payment of the estimated Subscription Price for all Common Shares subscribed for in the primary subscription and the over-subscription
privilege (for Record Date Shareholders) to the Subscription Agent by one of the methods described below. Alternatively, Rights holders
may arrange for their financial intermediaries to submit notices of guaranteed delivery through DTC to be received by the Subscription
Agent along with proper payment of the estimated Subscription Price for all Common Shares subscribed for in the primary subscription and
the over-subscription privilege (for Record Date Shareholders) prior to 5:00 p.m., Eastern time, on the Expiration Date. The Fund
will accept only properly completed and executed subscription certificates actually received at any of the addresses listed below, prior
to 5:00 p.m., Eastern time, on the Expiration Date, or by the close of business on the first business day after the Expiration Date
following timely receipt of a notice of guaranteed delivery. See “—Payment for Common Shares.”

| S-17 |

| Subscription Certificate Delivery Method |     | Address/Number                                                                                                             |
| Notice of Guaranteed Delivery:           |     | Contact your broker-dealer, trust company, bank or other nominee to notify the Fund of your intent to exercise the Rights. |
| First Class Mail Only                    
 (No Express Mail or Overnight Courier):  |     | Equiniti Trust Company                                                                                                     
 1110 Centre Pointe Curve, Suite #101                                                                                       
 Mendota Heights, MN 55120                                                                                                  
 Attn: Reorganization Department                                                                                            |
| Express Mail or Overnight Courier:       |     | Equiniti Trust Company                                                                                                     
 1110 Centre Pointe Curve, Suite #101                                                                                       
 Mendota Heights, MN 55120                                                                                                  
 Attn: Reorganization Department                                                                                            |

The Fund will honor only subscription certificates
received by the Subscription Agent prior to 5:00 p.m., Eastern time, on the Expiration Date at one of the addresses listed above.
Delivery to an address other than those listed above will not constitute good delivery.

Information Agent

The Information Agent for the Offer is EQ Fund Solutions,
LLC. If you have questions or need further information about the Offer, please write the Information Agent at EQ Fund Solutions, LLC,
28 Liberty Street, 53rd Floor, New York, New York 10005 or call (800) 290-6429. Any questions or requests for assistance concerning the
method of subscribing for Common Shares or additional