Welcome to our dedicated page for Pioneer Municipal High Income Opp Fund SEC filings (Ticker: MIO), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Pioneer Municipal High Income Opportunities Fund Inc. filings document corporate-status and listing matters for a closed-end municipal income fund. The Form 25 record identifies the fund’s common stock and the New York Stock Exchange notification to remove that class from listing and Section 12(b) registration.
These disclosures relate to MIO’s transition from an exchange-listed closed-end fund toward wind-down status after stockholders approved liquidation and dissolution. The filing record centers on security registration, exchange-listing status and the formal public-company steps tied to that transition.
Pioneer Municipal High Income Opportunities Fund, Inc. (MIO) insiders reported a large disposition. On 08/27/2025, Saba Capital Management, L.P. (through Boaz Weinstein) reported a sale of 2,161,352 shares of Common Stock at $11.23 per share under transaction code J(1), resulting in zero shares beneficially owned after the transaction. The filing states the fund was liquidated and shares were surrendered in exchange for cash. The Form 4 is signed by Saba Capital Management and Boaz Weinstein on 09/02/2025.
Amendment No. 6 to a Schedule 13D/A for Pioneer Municipal High Income Opportunities Fund, Inc. (MIO) updates Item 5 and reiterates the identities of the reporting persons as Saba Capital Management, L.P., Saba Capital Management GP, LLC and Boaz R. Weinstein. The filing states the Reporting Persons currently report 0 common shares beneficially owned, representing 0% of the class based on 16,885,273 shares outstanding as of April 30, 2025. The filing discloses that approximately $22,658,835 was paid to acquire the Common Shares reported herein and that funds and accounts advised by Saba Capital have the right to receive dividends and sale proceeds. The filing also states there have been no transactions in the common shares since the Schedule 13D/A filed on February 3, 2025.
Amendment No. 6 to a Schedule 13D/A for Pioneer Municipal High Income Opportunities Fund, Inc. (MIO) updates Item 5 and reiterates the identities of the reporting persons as Saba Capital Management, L.P., Saba Capital Management GP, LLC and Boaz R. Weinstein. The filing states the Reporting Persons currently report 0 common shares beneficially owned, representing 0% of the class based on 16,885,273 shares outstanding as of April 30, 2025. The filing discloses that approximately $22,658,835 was paid to acquire the Common Shares reported herein and that funds and accounts advised by Saba Capital have the right to receive dividends and sale proceeds. The filing also states there have been no transactions in the common shares since the Schedule 13D/A filed on February 3, 2025.
The New York Stock Exchange filed a Form 25 notifying removal of the class of securities of Pioneer Municipal High Income Opportunities Fund, Inc. (symbol MIO) from listing and/or registration under Section 12(b) of the Exchange Act. The filing lists the issuer's principal office at 60 State Street, 5th Floor, Boston, MA 02109 and a contact phone number. The form references compliance with withdrawal procedures under the cited SEC rules but the signature, name and date fields are blank in the provided content.
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.