[SCHEDULE 13D/A] Pioneer Municipal High Income Fund, Inc. SEC Filing

Rhea-AI Filing Summary

Amendment No. 7 to a Schedule 13D/A for Pioneer Municipal High Income Fund, Inc. (ticker MHI) updates Item 5 and reiterates that the filing is being made jointly by Saba Capital Management, L.P., Saba Capital Management GP, LLC and Boaz R. Weinstein. The filing states the reporting persons' business addresses and roles and discloses that approximately $34,167,884 was paid to acquire the Common Shares reported in the statement. The filing also states that the aggregate amount beneficially owned by each reporting person is 0 shares (0%), using a share base of 22,771,349 common shares outstanding as of April 30, 2025. The amendment notes there have been no transactions in the common shares since the Schedule 13D/A filed on February 3, 2025.

Positive

• Disclosure of source of funds used to acquire the reported shares (investor subscriptions, capital appreciation and margin borrowings)
• Specific acquisition cost provided: approximately $34,167,884 paid to acquire the reported Common Shares
• Clear calculation basis for percentages using 22,771,349 shares outstanding as of April 30, 2025

Negative

• Aggregate beneficial ownership reported as 0 shares (0%), offering no current stake disclosure for investors
• No transactions since 2/3/25 are reported, limiting insight into recent activity or intent
• Amendment updates Item 5 only and does not provide additional materially new holdings or strategic information

Insights

Financial Analyst

TL;DR The filing discloses acquisition cost but reports no beneficial ownership, producing limited actionable investor impact.

The Schedule 13D/A identifies Saba Capital, Saba GP and Boaz Weinstein as the reporting persons and clarifies the source of funds as investor subscriptions, capital appreciation and margin borrowings. It states approximately $34.17 million was paid to acquire the shares referenced, and uses 22,771,349 shares outstanding to calculate percentages. Notably, the filing's tabular disclosure shows an aggregate beneficial ownership of 0 shares (0%)

Corporate Governance Expert

TL;DR The amendment updates Item 5 but does not disclose an active beneficial stake, limiting governance implications.

The filing formally amends Item 5 and reaffirms the reporting group's identities and control relationships. It documents procedural items such as address, citizenship and power-of-attorney details for signature execution. Because the reported aggregate beneficial ownership is 0%, there is no disclosed change in voting influence or control rights from these reporting persons. The lack of disclosed holdings means there are no immediate corporate governance effects described in this filing.

09/02/2025 - 06:05 AM

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 7)

PIONEER MUNICIPAL HIGH INCOME FUND, INC.

(Name of Issuer)

Common Shares, $0.001 par value

(Title of Class of Securities)

723763108

(CUSIP Number)

Saba Capital Management, L.P.
405 Lexington Avenue, 58th Floor, Attention: Michael D'Angelo
New York, NY, 10174
(212) 542-4635

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

08/27/2025

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

SCHEDULE 13D

CUSIP No. 723763108

1

Name of reporting person

Saba Capital Management, L.P.

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

0.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0 %

14

Type of Reporting Person (See Instructions)

PN, IA

Comment for Type of Reporting Person:

The percentages used herein are calculated based upon 22,771,349 shares of common stock outstanding as of 4/30/25, as disclosed in the company's N-CSRS filed 7/9/25

SCHEDULE 13D

CUSIP No. 723763108

1

Name of reporting person

Boaz R. Weinstein

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

NEW YORK

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

0.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

The percentages used herein are calculated based upon 22,771,349 shares of common stock outstanding as of 4/30/25, as disclosed in the company's N-CSRS filed 7/9/25

SCHEDULE 13D

CUSIP No. 723763108

1

Name of reporting person

Saba Capital Management GP, LLC

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 0.00
8	Shared Voting Power 0.00
9	Sole Dispositive Power 0.00
10	Shared Dispositive Power 0.00

11

Aggregate amount beneficially owned by each reporting person

0.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

0 %

14

Type of Reporting Person (See Instructions)

OO

Comment for Type of Reporting Person:

The percentages used herein are calculated based upon 22,771,349 shares of common stock outstanding as of 4/30/25, as disclosed in the company's N-CSRS filed 7/9/25

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Shares, $0.001 par value
(b)	Name of Issuer: PIONEER MUNICIPAL HIGH INCOME FUND, INC.
(c)	Address of Issuer's Principal Executive Offices: 60 State Street, 5th Floor, Boston, MASSACHUSETTS , 2109.
Item 1 Comment: This Amendment No. 7 amends Item 5.
Item 2.	Identity and Background
(a)	This Schedule 13D/A is being jointly filed by: (i) Saba Capital Management, L.P., a Delaware limited partnership ("Saba Capital"); (ii) Saba Capital Management GP, LLC, a Delaware limited liability company ("Saba GP"); and (iii) Mr. Boaz R. Weinstein ("Mr. Weinstein"), (together, the "Reporting Persons"). Any disclosures herein with respect to persons other than the Reporting Persons are made on information and belief after making inquiry to the appropriate party. The filing of this statement should not be construed as an admission that any Reporting Person is, for the purposes of Sections 13 of the Securities Exchange Act of 1934, the beneficial owner of the Common Shares reported herein.
(b)	The address of the business office of each of the Reporting Persons is 405 Lexington Avenue, 58th Floor, New York, New York 10174.
(c)	The principal business of: (i) Saba Capital is to serve as investment manager to private and public investment funds and/or accounts, (ii) Saba GP is to serve as general partner of the Saba Capital and other affiliated entities, and (iii) Mr. Weinstein, an individual, is managing member of the general partner of Saba Capital and other affiliated entities.
(d)	The Reporting Persons have not, during the last five years, been convicted in a criminal proceeding (excluding traffic violations or similar misdemeanors).
(e)	The Reporting Persons have not, during the last five years, been a party to a civil proceeding of a judicial or administrative body of competent jurisdiction and, as a result of such proceeding, was, or is subject to, a judgment, decree or final order enjoining future violations of, or prohibiting or mandating activities subject to, Federal or State securities laws or finding any violation with respect to such laws.
(f)	Saba Capital is organized as a limited partnership under the laws of the State of Delaware. Saba GP is organized as a limited liability company under the laws of the State of Delaware. Mr. Weinstein is a citizen of the United States.
Item 3.	Source and Amount of Funds or Other Consideration
	Funds for the purchase of the Common Shares were derived from the subscription proceeds from investors and the capital appreciation thereon and margin account borrowings made in the ordinary course of business. In such instances, the positions held in the margin accounts are pledged as collateral security for the repayment of debit balances in the account, which may exist from time to time. Since other securities are held in the margin accounts, it is not possible to determine the amounts, if any, of margin used to purchase the Common Shares reported herein. A total of approximately $34,167,884 was paid to acquire the Common Shares reported herein.
Item 5.	Interest in Securities of the Issuer
(a)	See the Reporting Persons section of this Schedule 13D/A for the aggregate number of Common Shares and percentages of the Common Shares beneficially owned by each of the Reporting Persons. The percentages used herein are calculated based upon 22,771,349 shares of common stock outstanding as of 4/30/25, as disclosed in the company's N-CSRS filed 7/9/25
(b)	See the Reporting Persons section of this Schedule 13D/A for the number of Common Shares as to which each Reporting Person has the sole or shared power to vote or direct the vote and sole or shared power to dispose or to direct the disposition.
(c)	No transactions in the Common Shares since the filing of the Schedule 13D/A on 2/3/25.
(d)	The funds and accounts advised by Saba Capital have the right to receive the dividends and proceeds of sales from the Common Shares.
(e)	Not Applicable

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.

Saba Capital Management, L.P.

Signature:	/s/ Michael D'Angelo
Name/Title:	General Counsel
Date:	08/29/2025

Boaz R. Weinstein

Signature:	/s/ Michael D'Angelo
Name/Title:	Authorized Signatory
Date:	08/29/2025

Saba Capital Management GP, LLC

Signature:	/s/ Michael D'Angelo
Name/Title:	Attorney-in-fact*
Date:	08/29/2025

Comments accompanying signature:

Pursuant to a power of attorney dated as of November 16, 2015, which is incorporated herein by reference to Exhibit 2 to the Schedule 13G filed by the Reporting Persons on December 28, 2015, accession number: 0001062993-15-006823