Morgan Stanley joint filing shows 11.4% stake in Guggenheim trust (GBAB)

Rhea-AI Filing Summary

Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust ownership reported by Morgan Stanley entities as holding 11.4% of the fund's Common Shares of Beneficial Interest. The Schedule 13G/A (Amendment No. 3) lists 3,168,127 shares (Morgan Stanley) and 3,165,995 shares (Morgan Stanley Smith Barney LLC) in shared dispositive power. The filing is a joint disclosure by the two entities and includes Exhibits 99.1 (Joint Filing Agreement) and 99.2 (Item 7 subsidiary information).

Key Figures

Percent of class: 11.4% Shares beneficially owned (MS Reporting Units): 3,168,127 shares Shares beneficially owned (MS Smith Barney): 3,165,995 shares +2 more

5 metrics

Percent of class 11.4% Beneficial ownership reported on Schedule 13G/A

Shares beneficially owned (MS Reporting Units) 3,168,127 shares Shared dispositive power reported for Morgan Stanley

Shares beneficially owned (MS Smith Barney) 3,165,995 shares Shared dispositive power reported for Morgan Stanley Smith Barney LLC

Form type Schedule 13G/A (Amendment No. 3) Ownership disclosure under SEC rules

Signatures date 05/12/2026 Authorized signatories executed the amendment

Key Terms

Schedule 13G/A, Beneficial ownership, Shared Dispositive Power, Joint Filing Agreement

4 terms

Schedule 13G/A regulatory

"This document is an amendment to a Schedule 13G/A (Amendment No. 3)"

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.

Beneficial ownership financial

"Amount beneficially owned: See the response(s) to Item 9 on the attached cover page(s)."

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.

Shared Dispositive Power financial

"Shared Dispositive Power 3,168,127.00 is listed for Morgan Stanley"

Joint Filing Agreement regulatory

"Exhibit 99.1 Joint Filing Agreement"

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Accepted by SEC EDGAR 05/12/2026 - 12:39 PM Learn about SEC filing dates

FAQ

What stake does Morgan Stanley report in GBAB?

Morgan Stanley entities report holding 11.4% of GBAB common shares. The filing attributes 3,168,127 shares to Morgan Stanley and 3,165,995 shares to Morgan Stanley Smith Barney LLC as shared dispositive power.

Is this filing an initial disclosure or an amendment for GBAB?

This document is an Amendment No. 3 to a Schedule 13G/A. It updates prior Schedule 13G information and includes a joint filing agreement and Item 7 subsidiary exhibit.

Do the Morgan Stanley entities claim sole voting power over GBAB shares?

No; the filing shows 0 sole voting and sole dispositive power and reports shared voting and dispositive power amounts instead, indicating collective control among reporting units.

Who signed the amended Schedule 13G/A for GBAB?

The amendment is signed by Claire Gordon for Morgan Stanley and David Galasso for Morgan Stanley Smith Barney LLC, each as an authorized signatory, dated 05/12/2026.

What exhibits accompany the GBAB Schedule 13G/A amendment?

The filing includes Exhibit 99.1 (Joint Filing Agreement) and Exhibit 99.2 (Item 7 subsidiary identification and classification) as attachments to the amendment.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

Guggenheim Taxable Municipal Bond & Investment Grade Debt Trust

(Name of Issuer)

Common Shares of Beneficial Interest

(Title of Class of Securities)

401664107

(CUSIP Number)

03/31/2026

(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 3,168,127.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,168,127.00

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)

11.4 %

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 3,165,995.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

3,165,995.00

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)

11.4 %

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: 11.4 %
(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:	05/12/2026

Morgan Stanley Smith Barney LLC

Signature:	David Galasso
Name/Title:	Authorized Signatory, Morgan Stanley Smith Barney LLC
Date:	05/12/2026

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).