Company: SRV
Filing Date: 2025-01-14
Form Type: 424B2
Source: 0001398344-25-000635
Chunk: 7

Company: NXG Cushing Midstream Energy Fund
Filing Date: 2025-01-14
Form: 424B2
Chunk 7
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, D.C. 20549. The SEC maintains a web site at www.sec.gov containing reports, proxy
and information statements and other information regarding registrants, including the Fund, that file electronically with the SEC.

This Prospectus Supplement and the accompanying Prospectus
constitute part of a Registration Statement filed by the Trust with the SEC under the Securities Act, and the 1940 Act (File Nos. 333-273954
and 811-22072). This Prospectus Supplement and the accompanying Prospectus omit certain of the information contained in the Registration
Statement, and reference is hereby made to the Registration Statement and related exhibits for further information with respect to the
Fund and the Common Shares offered hereby. Any statements contained herein or in the accompanying Prospectus concerning the provisions
of any document are not necessarily complete, and, in each instance, reference is made to the copy of such document filed as an exhibit
to the Registration Statement or otherwise filed with the SEC. Each such statement is qualified in its entirety by such reference. The
complete Registration Statement may be obtained from the SEC upon payment of the fee prescribed by its rules and regulations or free of
charge through the SEC’s website (www.sec.gov).

The Fund will provide without charge to each person,
including any beneficial owner, to whom this Prospectus Supplement and the accompanying Prospectus are delivered, upon written or oral
request, a copy of any and all of the information that has been incorporated by reference in this Prospectus Supplement or the accompanying
Prospectus. You may request such information by calling (214) 692-6334 or by writing to NXG Investment Management at One Energy Square,
4925 Greenville Avenue, Suite 1310, Dallas, Texas 75206, or you may obtain a copy (and other information regarding the Fund) from the
SEC’s website (www.sec.gov). Free copies of this Prospectus Supplement, the accompanying Prospectus, the SAI and any incorporated
information will also be available from the Fund’s website at www.nxgim.com. Information contained on the Fund’s website is
not incorporated by reference into this Prospectus Supplement or the accompanying Prospectus and should not be considered to be part of
this Prospectus Supplement or the accompanying Prospectus.

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<div align='center'>INCORPORATION BY REFERENCE</div>

This Prospectus Supplement and the accompanying Prospectus
is part of a registration statement that the Fund has filed with the SEC. The Fund is permitted to