Firm profile

Nxg Investment Management

DALLAS, TXCRD 131517Registration Status: ApprovedEffective since June 17, 2004SEC # 801-63255Latest ADV August 6, 2026

Nxg Investment Management is an SEC registered investment adviser organized as a limited partnership with a primary office location in Dallas, TX. Its latest Form ADV filing, dated August 6, 2026, reports $1.8B in regulatory assets under management, 10 employees, 1 office, and 6 accounts.

Assets Under Management
$1.8B
Employees
10
Offices
1 office
Total Clients
6

Associated firm names

6 names listed
  • CUSHING ASSET MANAGEMENT, LP
  • SWANK ENERGY INCOME ADVISORS, LP
  • NXG INVESTMENT MANAGEMENT
  • FORMERLY, SWANK ENERGY INCOME ADVISORS, L.P.

Leadership

5 roles identified
CEOJohn M. Musgrave
CCOBrad B. Mead
CFOBlake R. Nelson

Advisory services offered

3 types reported
Portfolio management for individuals and small businesses
Portfolio management for investment companies
Portfolio management for pooled investment vehicles

Fee models offered

2 types reported
Asset based fees
Performance-based fees

Offices & Contact

Primary office

DALLAS, Texas, United States

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Primary office regionOther reported regions

Shading shows states and countries with reported offices. Cities are listed below; shading does not indicate service coverage.

Texas

DALLASPrimary office

1 office records listed · 1 total offices reported. Counts can use different reporting dates. SEC filers may list only their largest 25 additional offices.

Contact and digital presence

ADV profile links

Regulatory Assets Under Management Breakdown

Total regulatory assets under management$1.8Bas of August 6, 2026
Discretionary99.9%
$1.7B
100% of total RAUM99.9%
Non-discretionary0.1%
$952K
0% of total RAUM0.1%
Regulatory assets under management are split between discretionary and non-discretionary assets.

Client Coverage Demographics

Top client segmentInvestment Cos. represent 50.0% of total clients.
Top client categories% of clientsClients
1
Investment Cos.
50.0%
3
2
Pooled Investment Vehicles
33.3%
2
3
Pension Plans
16.7%
1

Assets under management Growth by Quarter

Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.

Total AUM$1.8B
Total Accounts6
10Y AUM Change$-2.0B (-53.3%)

Private Funds

Private funds reported by Nxg Investment Management

Loading private fund disclosures…

Employee Growth by Quarter

Quarterly points use the latest ADV filing or SEC roster snapshot available in each quarter.

Total Employees10
Clients per Employee1:1
10Y Employee Change-28 (-73.7%)

Historical AUM and employee figures reflect available SEC Form ADV filings under this CRD. Filing gaps may reflect registration status changes, dormant periods, state registration periods, firm restructuring, or other reporting changes. Rialytix does not interpolate missing periods.


Ownership

Reported direct and indirect ownership ranges

Each range applies to a separate reported relationship and should not be added together.

Reported ownership ranges

Highlighted bands show the percentage range reported in Form ADV.

0%25%50%75%100%
NXG CUSHING, LLCDirect owner · Schedule AInterest in NXG INVESTMENT MANAGEMENT
50% to < 75%
JERRY VANE SWANKDirect owner · Schedule AInterest in NXG INVESTMENT MANAGEMENT
25% to < 50%
JOHN MARSHALL MUSGRAVEDirect owner · Schedule AInterest in NXG INVESTMENT MANAGEMENT
< 5%
JOHN MARSHALL MUSGRAVEIndirect owner · Schedule BInterest in NXG CUSHING, LLC
25% to < 50%
TODD WILLIAM SUNDERLANDIndirect owner · Schedule BInterest in NXG CUSHING, LLC
25% to < 50%
BLAKE ROBERT NELSONIndirect owner · Schedule BInterest in NXG CUSHING, LLC
25% to < 50%

Bars represent the reported range at that individual ownership step, not an estimated percentage of the advisory firm. Indirect relationships may refer to intermediate entities rather than directly to Nxg Investment Management.

Reported ownership and control details

Form ADV · Filing date 2026-08-06 · Schedules A and B

9 entries
#Owner / person & roleInterest in entityReported interestControl personTitle / status acquiredSource
1JERRY VANE SWANKLIMITED PARTNERIndividualNXG INVESTMENT MANAGEMENT25% to less than 50%Code CYesLIMITED PARTNER10/2003Schedule APDF page 25
2BLAKE ROBERT NELSONCHIEF FINANCIAL OFFICERIndividualNXG INVESTMENT MANAGEMENTLess than 5%Code NAYesCHIEF FINANCIAL OFFICER02/2021Schedule APDF page 25
3JOHN MARSHALL MUSGRAVEPRESIDENT AND CEO (10/2023) MANAGING PARTNER (12/2022) AND CO-CHIEF INVESTMENT OFFICER (09/2019)IndividualNXG INVESTMENT MANAGEMENTLess than 5%Code NAYesPRESIDENT AND CEO (10/2023) MANAGING PARTNER (12/2022) AND CO-CHIEF INVESTMENT OFFICER (09/2019)09/2019Schedule APDF page 25
4TODD WILLIAM SUNDERLANDCHIEF OPERATING OFFICER AND CHIEF RISK OFFICERIndividualNXG INVESTMENT MANAGEMENTLess than 5%Code NAYesCHIEF OPERATING OFFICER AND CHIEF RISK OFFICER12/2022Schedule APDF page 25
5BRAD BENJAMIN MEADCHIEF COMPLIANCE OFFICERIndividualNXG INVESTMENT MANAGEMENTLess than 5%Code NAYesCHIEF COMPLIANCE OFFICER10/2024Schedule APDF page 25
6NXG CUSHING, LLCGENERAL PARTNERDomestic entityNXG INVESTMENT MANAGEMENT50% to less than 75%Code DYesGENERAL PARTNER07/2026Schedule APDF page 25
7JOHN MARSHALL MUSGRAVEMANAGING MEMBERIndividualNXG CUSHING, LLC25% to less than 50%Code CYesMANAGING MEMBER06/2024Schedule BPDF page 25
8TODD WILLIAM SUNDERLANDMANAGING MEMBERIndividualNXG CUSHING, LLC25% to less than 50%Code CYesMANAGING MEMBER06/2024Schedule BPDF page 26
9BLAKE ROBERT NELSONMANAGING MEMBERIndividualNXG CUSHING, LLC25% to less than 50%Code CYesMANAGING MEMBER06/2024Schedule BPDF page 26

Less than 5% may include zero. Code F identifies a role without specifying a percentage. Reported interests may overlap and may not include every owner. Total indirect ownership is not calculated.

Compliance & Disclosures

Filing dated 8/6/2026 3:50:14 PM

Responses were selected by the RIA in its filing. Questions are shortened for readability; “you” refers to the reporting firm, and some questions also cover advisory affiliates.

RIA or supervised-person involvementThe RIA reported that none of the events below involve the firm or its supervised persons.RIA responseNo
AFelonies2 No

In the past ten years, have you or any advisory affiliate:

  • A1Been convicted of or pleaded guilty or no contest to a felony?No
  • A2Been charged with a felony?No
BMisdemeanors2 No

In the past ten years, have you or any advisory affiliate:

  • B1Been convicted of or pleaded guilty or no contest to a misdemeanor involving investments, an investment-related business, fraud, false statements or omissions, wrongful taking of property, bribery, perjury, forgery, counterfeiting, or extortion?No
  • B2Been charged with a misdemeanor of the kind listed above?No
CSEC or CFTC actions3 Yes2 No

Has the SEC or CFTC ever:

  • C1Found you or an advisory affiliate made a false statement or omission?No
  • C2Found you or an advisory affiliate violated SEC or CFTC regulations or statutes?Yes
  • C3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
  • C4Entered an order against you or an advisory affiliate in connection with investment-related activity?Yes
  • C5Imposed a civil money penalty on you or an advisory affiliate, or ordered you or an advisory affiliate to cease and desist from any activity?Yes
DOther regulatory actions5 No

Has any other federal regulatory agency, state regulatory agency, or foreign financial regulatory authority ever:

  • D1Found you or an advisory affiliate made a false statement or omission, or was dishonest, unfair, or unethical?No
  • D2Found you or an advisory affiliate violated investment-related regulations or statutes?No
  • D3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
  • D4In the past ten years, entered an order against you or an advisory affiliate in connection with investment-related activity?No
  • D5Denied, suspended, or revoked your or an advisory affiliate’s registration or license, or otherwise prevented association with an investment-related business or restricted activities?No
ESelf-regulatory organization actions4 No

Has a self-regulatory organization or commodities exchange ever:

  • E1Found you or an advisory affiliate made a false statement or omission?No
  • E2Found you or an advisory affiliate violated its rules, other than a violation designated as a minor rule violation under an SEC-approved plan?No
  • E3Found you or an advisory affiliate caused an investment-related business to have its authorization to do business denied, suspended, revoked, or restricted?No
  • E4Disciplined you or an advisory affiliate by expulsion, suspension, barring association with other members, or otherwise restricting activities?No
FProfessional authorizations1 No
  • FHas an authorization to act as an attorney, accountant, or federal contractor granted to you or an advisory affiliate ever been revoked or suspended?No
GPending regulatory proceedings1 No
  • GAre you or any advisory affiliate now the subject of a regulatory proceeding that could result in a “Yes” answer to any part of C, D, or E?No
HCivil judicial actions and proceedings4 No

(1) Court actions

Has a domestic or foreign court:

  • H(1)(a)In the past ten years, enjoined you or an advisory affiliate in connection with investment-related activity?No
  • H(1)(b)Found that you or an advisory affiliate violated investment-related statutes or regulations?No
  • H(1)(c)Dismissed, pursuant to a settlement agreement, an investment-related civil action brought against you or an advisory affiliate by a state or foreign financial regulatory authority?No

(2) Pending civil proceedings

  • H(2)Are you or any advisory affiliate now the subject of a civil proceeding that could result in a “Yes” answer to any part of H(1)?No
Additional DRP filings 1 source block

Verbatim excerpts from supporting DRP filings, which may concern the firm or advisory affiliates. Amounts retain their filed labels; no total or attribution is inferred.

regulatory · block 1PDF pages 26–28
Regulator name — filed text
U.S. SECURITIES AND EXCHANGE COMMISSION
Monetary/Fine Amount — filed text
$ 100,000.00
How was matter resolved — filed text
Settled

Action status / disposition — filed text

SOLELY FOR THE PURPOSE OF SETTLING THESE PROCEEDINGS, CUSHING CONSENTED TO THE ORDER WITHOUT ADMITTING OR DENYING THE MATTERS THEREIN (EXCEPT THE SEC'S JURISDICTION). THE ALLEGATIONS, DISPOSITIONS, FINDINGS AND SANCTIONS OF THE ORDER ARE DESCRIBED IN ITEMS 7 AND 12 ABOVE.
Other filed details

Description of allegations — filed text

ON AUGUST 28, 2018, CUSHING ASSET MANAGEMENT, LP ("CUSHING") ENTERED INTO A SETTLEMENT WITH THE SECURITIES AND EXCHANGE COMMISSION ("SEC"), WHICH RESULTED IN AN ORDER ISSUED BY THE SEC. THE ORDER RESOLVES THE SEC'S ALLEGATIONS THAT CUSHING CAUSED ITS CLIENT'S VIOLATIONS OF SECTION 17(A) OF THE INVESTMENT COMPANY ACT OF 1940 ("INVESTMENT COMPANY ACT") IN CONNECTION WITH TWO UNDISCLOSED CROSS TRADES ON DECEMBER 20, 2012.

Sanction detail — filed text

THE ORDER REQUIRES CUSHING TO CEASE AND DESIST FROM COMMITTING OR CAUSING ANY VIOLATIONS AND ANY FUTURE VIOLATIONS OF SECTION 17(A)(1) OF THE INVESTMENT COMPANY ACT AND REQUIRES CUSHING TO PAY A CIVIL MONETARY PENALTY OF $100,000, WHICH CUSHING PAID ON SEPTEMBER 14, 2018.
Full extracted filing text

Includes form instructions and options. Options shown in this text do not identify which boxes were selected.

GENERAL INSTRUCTIONS
This Disclosure Reporting Page (DRP ADV) is an 
INITIAL OR
AMENDED response used to report details for affirmative responses to Items 11.C., 11.D.,
11.E., 11.F. or 11.G. of Form ADV.
Regulatory Action
Check item(s) being responded to:
11.C(1)
11.C(2)
11.C(3)
11.C(4)
11.C(5)
11.D(1)
11.D(2)
11.D(3)
11.D(4)
11.D(5)
11.E(1)
11.E(2)
11.E(3)
11.E(4)
11.F.
11.G.
Use a separate DRP for each event or proceeding . The same event or proceeding may be reported for more than one person or entity using one DRP. File with
a completed Execution Page. 
One event may result in more than one affirmative answer to Items 11.C., 11.D., 11.E., 11.F. or 11.G. Use only one DRP to report details related to the same
event. If an event gives rise to actions by more than one regulator, provide details for each action on a separate DRP.
PART I
A.  The person(s) or entity(ies) for whom this DRP is being filed is (are):
You (the advisory firm)
You and one or more of your advisory affiliates
One or more of your advisory affiliates
If this DRP is being filed for an advisory affiliate, give the full name of the advisory affiliate below (for individuals, Last name, First name, Middle name). 
If the advisory affiliate has a CRD number, provide that number. If not, indicate "non-registered" by checking the appropriate box.
ADV DRP - ADVISORY AFFILIATE
No Information Filed
This DRP should be removed from the ADV record because the advisory affiliate(s) is no longer associated with the adviser.
This DRP should be removed from the ADV record because: (1) the event or proceeding occurred more than ten years ago or (2) the adviser is
registered or applying for registration with the SEC or reporting as an exempt reporting adviser with the SEC and the event was resolved in the
adviser's or advisory affiliate's favor.
If you are registered or registering with a state securities authority , you may remove a DRP for an event you reported only in response to Item
11.D(4), and only if that event occurred more than ten years ago. If you are registered or registering with the SEC, you may remove a DRP for any

event listed in Item 11 that occurred more than ten years ago.
This DRP should be removed from the ADV record because it was filed in error, such as due to a clerical or data-entry mistake. Explain the
circumstances: 
B.
If the advisory affiliate is registered through the IARD system or CRD system, has the advisory affiliate submitted a DRP (with Form ADV, BD or U-4) to the
IARD or CRD for the event? If the answer is "Yes," no other information on this DRP must be provided.
 Yes
 No
NOTE: The completion of this form does not relieve the advisory affiliate of its obligation to update its IARD or CRD records.
PART II
1.  Regulatory Action initiated by:
SEC   
Other Federal   
State   
SRO
Foreign
(Full name of regulator, foreign financial regulatory authority, federal, state, or SRO) 
U.S. SECURITIES AND EXCHANGE COMMISSION
2.
Principal Sanction:
Cease and Desist
Other Sanctions: 
CIVIL AND ADMINISTRATIVE PENALTY(IES)/FINE(S).
3.
Date Initiated (MM/DD/YYYY): 
09/14/2018
 Exact
 Explanation
If not exact, provide explanation:
4.
Docket/Case Number:
ADMINISTRATIVE PROCEEDING FILE NO. 3-18767
5.
Advisory Affiliate Employing Firm when activity occurred which led to the regulatory action (if applicable):
6.
Principal Product Type:
No Product
Other Product Types: 
7.
Describe the allegations related to this regulatory action (your response must fit within the space provided):
ON AUGUST 28, 2018, CUSHING ASSET MANAGEMENT, LP ("CUSHING") ENTERED INTO A SETTLEMENT WITH THE SECURITIES AND EXCHANGE
COMMISSION ("SEC"), WHICH RESULTED IN AN ORDER ISSUED BY THE SEC. THE ORDER RESOLVES THE SEC'S ALLEGATIONS THAT CUSHING CAUSED ITS
CLIENT'S VIOLATIONS OF SECTION 17(A) OF THE INVESTMENT COMPANY ACT OF 1940 ("INVESTMENT COMPANY ACT") IN CONNECTION WITH TWO
UNDISCLOSED CROSS TRADES ON DECEMBER 20, 2012.
8.
Current Status?      
 Pending
 On Appeal
 Final
9.
If on appeal, regulatory action appealed to (SEC, SRO, Federal or State Court) and Date Appeal Filed:
If Final or On Appeal, complete all items below. For Pending Actions, complete Item 13 only.
10. How was matter resolved:
Settled
11. Resolution Date (MM/DD/YYYY):
09/14/2018
 Exact
 Explanation
If not exact, provide explanation:
12. Resolution Detail:
A.  Were any of the following Sanctions Ordered (check all appropriate items)?
 Monetary/Fine Amount: $ 100,000.00
 Revocation/Expulsion/Denial
 Disgorgement/Restitution
 Censure
 Cease and Desist/Injunction
 Bar
 Suspension
B.
Other Sanctions Ordered:
NONE

Sanction detail: if suspended, enjoined or barred, provide duration including start date and capacities affected (General Securities Principal,
Financial Operations Principal, etc.). If requalification by exam/retraining was a condition of the sanction, provide length of time given to
requalify/retrain, type of exam required and whether condition has been satisfied. If disposition resulted in a fine, penalty, restitution,
disgorgement or monetary compensation, provide total amount, portion levied against you or an advisory affiliate, date paid and if any portion of
penalty was waived: 
THE ORDER REQUIRES CUSHING TO CEASE AND DESIST FROM COMMITTING OR CAUSING ANY VIOLATIONS AND ANY FUTURE VIOLATIONS OF
SECTION 17(A)(1) OF THE INVESTMENT COMPANY ACT AND REQUIRES CUSHING TO PAY A CIVIL MONETARY PENALTY OF $100,000, WHICH
CUSHING PAID ON SEPTEMBER 14, 2018.
13. Provide a brief summary of details related to the action status and (or) disposition and include relevant terms, conditions and dates (your response
must fit within the space provided).
SOLELY FOR THE PURPOSE OF SETTLING THESE PROCEEDINGS, CUSHING CONSENTED TO THE ORDER WITHOUT ADMITTING OR DENYING THE MATTERS
THEREIN (EXCEPT THE SEC'S JURISDICTION). THE ALLEGATIONS, DISPOSITIONS, FINDINGS AND SANCTIONS OF THE ORDER ARE DESCRIBED IN ITEMS 7
AND 12 ABOVE.

* Metrics are based on the latest available data, including Form ADV filings, brochures, and relationship summaries pulled from the SEC IAPD, and may be subject to change. Learn what is included in the Rialytix data. Please refer to the firm's official disclosures for the most accurate information using their CRD number. This is not investment advice.