Sit Investment amends SRV Schedule 13G/A; reports 0% stake (CUSIP 231631300)

Rhea-AI Filing Summary

The filing shows Sit Investment Associates, Inc. and Sit Fixed Income Advisors II, LLC amended a Schedule 13G/A reporting their relationship to NXG Cushing Midstream Energy Fund common stock (CUSIP 231631300). The cover-page responses indicate 0.00 shares for sole and shared voting and dispositive power and a 0% reported percent of the class. The filing states the advisers act on behalf of client Accounts and disclaim beneficial ownership under Rule 13d-4.

Insights

Compliance Counsel

Amendment confirms administrative ownership posture and a Rule 13d-4 disclaimer.

The filing records that Sit Investment Associates and its subsidiary filed an amendment to a Schedule 13G/A for the issuer identified by CUSIP 231631300. It lists 0.00 sole and shared voting and dispositive powers and a 0% class percentage on the cover entries.

This an administrative disclosure: the advisers state they exercise voting/investment power on behalf of client Accounts but disclaim direct beneficial ownership per Rule 13d-4. Subsequent filings would be required if their position crosses applicable reporting thresholds.

Portfolio Manager

Advisers report no direct beneficial stake; holdings are client accounts' assets.

The text explains SIA and SFI provide investment management to Accounts that own the securities; all reported securities are held in those Accounts. The cover entries show zero voting/dispositive power and 0% class percentage for each filer.

Practically, this filing signals no adviser-controlled position disclosed here; any material change in client holdings would trigger an updated Schedule 13G/A or Schedule 13D if control intent arises.

Key Figures

CUSIP: 231631300 Cover entry voting power: 0.00 Percent of class: 0% +2 more

5 metrics

CUSIP 231631300 NXG Cushing Midstream Energy Fund common stock

Cover entry voting power 0.00 sole and shared voting power reported on cover pages

Percent of class 0% percent of class reported on cover pages

Document reference date 04/01/2026 date shown near CUSIP on cover content

Signature date 06/05/2026 signed by Paul E. Rasmussen, Vice President

Key Terms

Schedule 13G/A, Rule 13d-4, beneficial ownership

3 terms

Schedule 13G/A regulatory

"amended a Schedule 13G/A reporting their relationship to NXG Cushing"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Rule 13d-4 regulatory

"Pursuant to Rule 13d-4 of the Securities Exchange Act of 1934"

beneficial ownership regulatory

"SIA and SFI disclaim beneficial ownership of such securities"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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FAQ

What does the Schedule 13G/A filed by Sit Investment Associates mean for SRV?

It amends a passive ownership disclosure for SRV (CUSIP 231631300), showing 0.00 voting/dispositive powers and 0% of the class. The advisers state holdings are owned by client Accounts and disclaim beneficial ownership under Rule 13d-4.

Does the filing indicate Sit Investment Associates beneficially owns SRV shares?

No. The filing states all securities are owned by client Accounts and the advisers disclaim beneficial ownership pursuant to Rule 13d-4. Cover-page entries list 0.00 for sole/shared voting and dispositive powers and 0% of the class.

Who signed the Schedule 13G/A amendment for SRV and when?

The amendment is signed by Paul E. Rasmussen, Vice President, with signature dates shown as 06/05/2026 for both filers. The document also references 04/01/2026 near the CUSIP line on the cover content.

When would Sit Investment Associates need to update this filing for SRV?

An update is required if client Accounts’ holdings cross reporting thresholds or indicate control intent. The filing itself notes the advisers act for Accounts and disclaim ownership; any material change in ownership would trigger a new Schedule 13G/A or Schedule 13D filing.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

NXG Cushing Midstream Energy Fund

(Name of Issuer)

Common Stock

(Title of Class of Securities)

231631300

(CUSIP Number)

04/01/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 231631300

1

Names of Reporting Persons

Sit Investment Associates, Inc.

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

MINNESOTA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

CUSIP Number(s): 231631300

1

Names of Reporting Persons

Sit Fixed Income Advisors II, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 0.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

0.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

0 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: NXG Cushing Midstream Energy Fund
(b)	Address of issuer's principal executive offices: 600 N. Pearl Street, Suite 1205 Dallas, Texas, 75201
Item 2.
(a)	Name of person filing: Sit Investment Associates, Inc. Sit Fixed Income Advisors II, LLC
(b)	Address or principal business office or, if none, residence: c/o Sit Investment Associates, Inc. 80 South Eighth Street, Suite 3300 Minneapolis, MN 55402
(c)	Citizenship: Sit Investment Associates, Inc. Minnesota Corporation Sit Fixed Income Advisors II, LLC Delaware LLC
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 231631300
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: See response to item 9 on each cover page.
(b)	Percent of class: See response to item 11 on each cover page.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See response to item 5 on each cover page.
	(ii) Shared power to vote or to direct the vote: See response to item 6 on each cover page.
	(iii) Sole power to dispose or to direct the disposition of: See response to item 7 on each cover page.
	(iv) Shared power to dispose or to direct the disposition of: See response to item 8 on each cover page. Sit Investment Associates, Inc. ("SIA") is an investment adviser registered under section 203 of the Investment Advisers Act of 1940. Sit Fixed Income Advisors II, LLC ("SFI") is an investment adviser registered under section 203 of the Investment Advisers Act of 1940 and a subsidiary of SIA. SIA and SFI provide investment management services to client accounts ("Accounts"). In their roles as investment advisers SIA and SFI possess shared voting and investment power over securities of the Issuer described in this schedule 13G owned by the Accounts and may be deemed to be the beneficial owner of such shares of the Issuer owned by the Accounts. All securities reported in this schedule 13G are owned by the Accounts. Pursuant to Rule 13d-4 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), SIA and SFI disclaim beneficial ownership of such securities.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Sit Investment Associates, Inc.

Signature:	/s/ Paul E. Rasmussen
Name/Title:	Paul Rasmussen / Vice President
Date:	06/05/2026

Sit Fixed Income Advisors II, LLC

Signature:	/s/ Paul E. Rasmussen
Name/Title:	Paul Rasmussen / Vice President
Date:	06/05/2026