Morgan Stanley reports 12.8% stake in GBAB

Morgan Stanley and Morgan Stanley Smith Barney LLC report beneficial ownership of common shares of beneficial interest of Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust.

Rhea-AI Filing Summary

Morgan Stanley and Morgan Stanley Smith Barney LLC report beneficial ownership of common shares of beneficial interest of Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust. Morgan Stanley reports beneficial ownership of 3,542,881 shares, representing 12.8% of the class, with shared dispositive power over these shares and shared voting power over 2,134 shares.

Morgan Stanley Smith Barney LLC reports beneficial ownership of 3,540,749 shares, also corresponding to 12.8% of the class, with shared dispositive power over these shares and shared voting power over 2 shares. The disclosure covers securities beneficially owned, or deemed beneficially owned, by certain Morgan Stanley reporting units, and excludes other disaggregated units.

Key Figures

Shares beneficially owned (Morgan Stanley): 3,542,881 shares Percent of class: 12.8 % Shared voting power (Morgan Stanley): 2,134 shares +3 more

6 metrics

Shares beneficially owned (Morgan Stanley) 3,542,881 shares Beneficial ownership reported for common shares of beneficial interest

Percent of class 12.8 % Percentage of GBAB common shares attributed to each reporting person

Shared voting power (Morgan Stanley) 2,134 shares Shares over which Morgan Stanley reports shared power to vote

Shared dispositive power (Morgan Stanley) 3,542,881 shares Shares over which Morgan Stanley reports shared power to dispose

Shared voting power (MSSB LLC) 2 shares Shares over which Morgan Stanley Smith Barney LLC has shared voting power

Shared dispositive power (MSSB LLC) 3,540,749 shares Shares over which Morgan Stanley Smith Barney LLC has shared dispositive power

Key Terms

beneficially owned, shared voting power, shared dispositive power, parent holding company, +1 more

5 terms

beneficially owned financial

"this filing reflects the securities beneficially owned, or that may be deemed to be beneficially owned"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

shared voting power financial

"6 | Shared Voting Power 2,134.00"

Shared voting power occurs when two or more parties jointly have the right to vote or decide how a block of company shares is cast, like co-owners who must agree before moving a piece of furniture. Investors care because who controls voting rights affects board elections, major corporate decisions and takeover outcomes, and shared control can alter regulatory disclosures and the practical influence any holder has over a company’s direction and value.

shared dispositive power financial

"8 | Shared Dispositive Power 3,542,881.00"

parent holding company financial

"If a parent holding company has filed this schedule, pursuant to (ii)(G)"

Joint Filing Agreement regulatory

"99.1 Joint Filing Agreement"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What stake in GBAB does Morgan Stanley report in this Schedule 13G/A?

Morgan Stanley reports beneficial ownership of 3,542,881 GBAB shares, representing 12.8% of the outstanding class. This ownership is primarily through shared dispositive power over the shares held by certain Morgan Stanley reporting units.

How many GBAB shares does Morgan Stanley Smith Barney LLC beneficially own?

Morgan Stanley Smith Barney LLC reports beneficial ownership of 3,540,749 GBAB shares, corresponding to 12.8% of the class. It has shared dispositive power over these shares and shared voting power over 2 shares specifically identified in the filing.

What voting power over GBAB shares does Morgan Stanley report?

Morgan Stanley reports shared voting power over 2,134 GBAB shares and no sole voting power. It also reports shared dispositive power over 3,542,881 shares, indicating influence over how those shares may be disposed.

What percentage of GBAB’s common shares is owned according to this filing?

Both Morgan Stanley and Morgan Stanley Smith Barney LLC each report beneficial ownership of 12.8% of GBAB’s common shares. This percentage reflects the portion of the class attributed to the reporting units covered in the disclosure.

Who signed the GBAB Schedule 13G/A on behalf of Morgan Stanley?

The Schedule 13G/A is signed by Claire Gordon as Authorized Signatory for Morgan Stanley and David Galasso as Authorized Signatory for Morgan Stanley Smith Barney LLC, each dated 08/13/2026.

Does the GBAB Schedule 13G/A include all Morgan Stanley units?

No. The disclosure states it reflects securities beneficially owned by certain Morgan Stanley reporting units. It specifically notes that units whose ownership is disaggregated under SEC guidance are not included in this reported beneficial ownership.

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

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Accepted by SEC EDGAR 08/13/2026 - 05:17 PM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 4)

Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust

(Name of Issuer)

Common Shares of Beneficial Interest

(Title of Class of Securities)

401664107

(CUSIP Number)

06/30/2026

(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): 401664107

1

Names of Reporting Persons

Morgan Stanley

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 2,134.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,542,881.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,542,881.00

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)

12.8 %

12

Type of Reporting Person (See Instructions)

HC, CO

SCHEDULE 13G

CUSIP Number(s): 401664107

1

Names of Reporting Persons

Morgan Stanley Smith Barney 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 2.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 3,540,749.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,540,749.00

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)

12.8 %

12

Type of Reporting Person (See Instructions)

BD, IA, CO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust
(b)	Address of issuer's principal executive offices: 227 WEST MONROE STREET, CHICAGO, IL, 60606
Item 2.
(a)	Name of person filing: 1: Morgan Stanley 2: Morgan Stanley Smith Barney LLC
(b)	Address or principal business office or, if none, residence: 1: 1585 Broadway, New York, NY 10036 ;2: 1585 Broadway, New York, NY 10036
(c)	Citizenship: 1: Delaware 2: Delaware
(d)	Title of class of securities: Common Shares of Beneficial Interest
(e)	CUSIP No.: 401664107
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 the response(s) to Item 9 on the attached cover page(s).
(b)	Percent of class: 12.8 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See the response(s) to Item 5 on the attached cover page(s).
	(ii) Shared power to vote or to direct the vote: See the response(s) to Item 6 on the attached cover page(s).
	(iii) Sole power to dispose or to direct the disposition of: See the response(s) to Item 7 on the attached cover page(s).
	(iv) Shared power to dispose or to direct the disposition of: See the response(s) to Item 8 on the attached cover page(s).
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
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.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99.2
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. * In Accordance with the Securities and Exchange Commission Release No. 34-39538 (January 12, 1998) (the "Release"), this filing reflects the securities beneficially owned, or that may be deemed to be beneficially owned, by certain operating units (collectively, the "MS Reporting Units") of Morgan Stanley and its subsidiaries and affiliates (collectively, "MS"). This filing does not reflect securities, if any, beneficially owned by any operating units of MS whose ownership of securities is disaggregated from that of the MS Reporting Units in accordance with the Release.

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.

Morgan Stanley

Signature:	Claire Gordon
Name/Title:	Authorized Signatory, Morgan Stanley
Date:	08/13/2026

Morgan Stanley Smith Barney LLC

Signature:	David Galasso
Name/Title:	Authorized Signatory, Morgan Stanley Smith Barney LLC
Date:	08/13/2026

Exhibit Information

EXHIBIT NO. EXHIBITS ------------------ ------------------------------------ 99.1 Joint Filing Agreement 99.2 Item 7 Information * Attention. Intentional misstatements or omissions of fact constitute federal criminal violations (see 18 U.S.C. 1001).