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

Rhea-AI Filing Summary

RiverNorth Capital Management, LLC reports beneficial ownership of 752,523 common shares of Pioneer Municipal High Income Opportunities Fund, Inc., representing 4.46% of the class. The filing shows RiverNorth holds sole voting and dispositive power over the reported shares and classifies the filer as an investment adviser organized in Delaware. The statement affirms the shares were acquired in the ordinary course of business and not to influence control of the issuer. The filing identifies the issuer's principal executive office in Boston and provides issuer CUSIP 723760104.

Positive

• Clear disclosure of beneficial ownership: 752,523 shares reported
• Sole voting and dispositive power confirmed for the reporting person
• Position below 5% (4.46%), indicating passive reporting status under Rule 13d-1(b)

Negative

• None.

Insights

Securities Analyst

TL;DR: A routine Schedule 13G/A discloses a 4.46% stake, with sole voting and dispositive power; this is informational and not control-seeking.

RiverNorth, an investment adviser, reports ownership of 752,523 shares of Pioneer Municipal High Income Opportunities Fund, Inc. The position represents under 5% of the class, which typically signals a passive investment for reporting purposes. The filing affirms ordinary-course acquisition and absence of intent to influence control, consistent with Rule 13d-1(b) disclosures. For investors, this record provides transparency about a notable institutional holder without indicating strategic change at the issuer.

Compliance/Risk Analyst

TL;DR: Filing meets disclosure requirements: identity, share count, percent ownership, and certification that holdings are passive.

The Schedule 13G/A includes required elements: reporting person identity and address, issuer details, CUSIP, classification as an investment adviser, and certification of ordinary-course holdings. Sole voting and dispositive power over the reported shares is explicitly stated. No exhibits or additional parties are identified. From a compliance perspective, the statement appears complete for a passive investor under the 13d-1(b) framework.

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Pioneer Municipal High Income Opportunities Fund, Inc.

(Name of Issuer)

Common Shares, $0.001 par value

(Title of Class of Securities)

723760104

(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. 723760104

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 752,523.15
6	Shared Voting Power 0.00
7	Sole Dispositive Power 752,523.15
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

752,523.15

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)

4.46 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Pioneer Municipal High Income Opportunities 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 Shares, $0.001 par value
(e)	CUSIP No.: 723760104
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: 752,523
(b)	Percent of class: 4.46 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 752,523
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 752,523
	(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 froim 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

Comments accompanying 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.

FAQ

What stake does RiverNorth (MIO) report in Pioneer Municipal High Income Opportunities Fund?

RiverNorth reports beneficial ownership of 752,523 shares, equal to 4.46% of the class.

Does RiverNorth have voting control over the reported shares?

Yes. The filing states RiverNorth has sole voting power and sole dispositive power over the 752,523 shares.

Is the RiverNorth position intended to influence control of the issuer?

No. The filing certifies the securities were acquired in the ordinary course of business and not to change or influence control.

Under what classification was the filer reported?

RiverNorth is classified as an Investment Adviser (IA) organized in Delaware.

What CUSIP and class are covered by this filing?

The filing covers common shares, $0.001 par value, CUSIP 723760104.