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

Rhea-AI Filing Summary

RiverNorth Capital Management reports beneficial ownership of 1,003,600 shares of Pioneer Municipal High Income Fund, Inc. common stock, representing 4.41% of the class. The filing states RiverNorth has sole voting and sole dispositive power over those shares.

The Schedule 13G/A indicates these holdings are held in the ordinary course of business and were not acquired to change or influence control of the issuer. The filing also notes that other persons have the right to receive proceeds from the sale of the reported securities.

Positive

• Transparent disclosure of beneficial ownership via an amended Schedule 13G/A
• Clear voting and dispositive authority reported: sole voting power and sole dispositive power over 1,003,600 shares
• Position certified as ordinary-course/passive, stating it was not acquired to influence control

Negative

• None.

Insights

Financial Analyst

TL;DR: RiverNorth holds a non-control, passive stake of 4.41% (1,003,600 shares) in MHI with sole voting and dispositive power.

RiverNorth's position at 4.41% is below the 5% threshold that typically signals a larger, potentially control-seeking stake. The report explicitly classifies the holdings as ordinary-course and not intended to influence control, which aligns with a passive investor profile. The declaration of sole voting and dispositive power over the shares is factual but does not, by itself, signal an intent to change governance given the sub-5% ownership level.

Corporate Governance Expert

TL;DR: Disclosure shows clear voting/dispositive authority but confirms passive intent; no governance change implied given the reported stake.

The Schedule 13G/A includes the required certification that the securities are held in the ordinary course of business and not for the purpose of influencing control, which is material for assessing investor intent. The filing also notes that other parties may be entitled to sale proceeds, indicating the position may be held on behalf of clients or accounts. From a governance standpoint, the filing raises no immediate control or takeover concerns.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 3)

PIONEER MUNICIPAL HIGH INCOME FUND, INC.

(Name of Issuer)

Common

(Title of Class of Securities)

723763108

(CUSIP Number)

06/30/2025

(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)

SCHEDULE 13G

CUSIP No. 723763108

1

Names of Reporting Persons

RIVERNORTH CAPITAL MANAGEMENT, 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 1,003,600.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 1,003,600.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

1,003,600.00

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)

4.41 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: PIONEER MUNICIPAL HIGH INCOME FUND, INC.
(b)	Address of issuer's principal executive offices: 60 STATE STREET, 5TH FLOOR, BOSTON, MA, 02109
Item 2.
(a)	Name of person filing: RiverNorth Capital Management, LLC
(b)	Address or principal business office or, if none, residence: 360 S. Rosemary Avenue, Ste. 1420 West Palm Beach, Florida 33401
(c)	Citizenship: Delaware
(d)	Title of class of securities: Common
(e)	CUSIP No.: 723763108
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: 1,003,600
(b)	Percent of class: 4.41 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,003,600
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 1,003,600
	(iv) Shared power to dispose or to direct the disposition of: 0
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.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Other persons have the right to receive the proceeds from the sale of the securities reported herein.
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. Not applicable.
Item 8.	Identification and Classification of Members of the Group.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(J), so indicate under Item 3(j) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. Not applicable.
Item 9.	Notice of Dissolution of Group.
	Notice of dissolution of a group may be furnished as an exhibit stating the date of the dissolution and that all further filings with respect to transactions in the security reported on will be filed, if required, by members of the group, in their individual capacity. See Item 5. 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.

RIVERNORTH CAPITAL MANAGEMENT, LLC

Signature:	/s/ Marcus Collins
Name/Title:	Marcus Collins, General Counsel and Chief Compliance Officer
Date:	08/14/2025

FAQ

How many MHI shares does RiverNorth own?

RiverNorth beneficially owns 1,003,600 shares of Pioneer Municipal High Income Fund common stock.

What percentage of MHI does RiverNorth hold?

The reported stake represents 4.41% of the outstanding class.

Does RiverNorth have voting power over the shares?

Yes. The filing reports sole voting power and sole dispositive power for the 1,003,600 shares.

Is this holding intended to influence control of MHI?

No. The filing includes a certification that the securities are held in the ordinary course of business and were not acquired to change or influence control.

Is RiverNorth’s ownership reported as more than 5%?

No. The filing indicates ownership of 5 percent or less of the class.

Who signed the Schedule 13G/A for RiverNorth?

The filing is signed by Marcus Collins, General Counsel and Chief Compliance Officer of RiverNorth Capital Management, LLC.