BlackRock (MVF) merges six municipal CEFs into three survivors; DMP set for 2026

Rhea-AI Filing Summary

BlackRock completed reorganizations that merged six municipal closed-end funds into three survivor funds and each Survivor Fund adopted a Discount Management Program.

The Reorganizations exchanged common shares based on relative NAV as of February 20, 2026, with cash paid for fractional shares; preferred shareholders received one-for-one Survivor Fund preferred shares. Each Survivor Fund's DMP measures an average daily discount from January 1, 2026 to September 30, 2026, and if the average discount exceeds 10.00% the Fund intends a tender offer to repurchase a minimum of 5% of outstanding common shares at 98% of NAV.

Insights

Corporate Actions Specialist

Completed mergers consolidate six municipal CEFs into three survivor funds; terms tied to NAVs.

The filing states six Acquired Funds were reorganized into three Survivor Funds with common-share exchange ratios derived from each Acquired Fund’s NAV at the close of business on February 20, 2026. Fractional shares were settled in cash, and preferred shareholders received Survivor Fund preferred shares one-for-one.

These are reorganizations based on relative NAVs and are described as expected to be non-taxable events. Timing for any liquidity from fractional-share cash distributions is not specified in the excerpt.

Closed-End Fund Governance Expert

Each Survivor Fund adopted a 2026 Discount Management Program with a single measurement period and a repurchase trigger.

Each DMP uses a Measurement Period from January 1, 2026 to September 30, 2026. If a Fund’s shares trade at an average daily discount to NAV of greater than 10.00% during that period, the Fund intends to offer to repurchase a minimum of 5% of outstanding common shares at 98% of NAV.

The filing notes the DMPs operate if certain conditions are met and cautions there is no guarantee shareholders can tender all shares desired or that the DMP will affect trading discounts. Subsequent filings may disclose operational details and tender timing.

Filed by BlackRock MuniYield Quality Fund III, Inc.

pursuant to Rule 425 under the Securities Act of 1933

and deemed filed pursuant to Rule 14a-6

under the Securities Exchange Act of 1934

Subject Company: BlackRock MuniVest Fund, Inc.

File No.: 811-05611

Date: February 23, 2026

Contact:

1-800-882-0052

BlackRock Announces Completion of Certain Municipal CEF Reorganizations and Adoption of Discount Management Programs

New York, February 23, 2026 – BlackRock Advisors, LLC announced today each of the closed-end funds named below (each, a “Fund” and collectively, the “Funds”) have completed their reorganizations (each, a “Reorganization” and collectively, the “Reorganizations”). Additionally, each of the Survivor Funds, as identified below, adopted a Discount Management Program that seeks to enhance long-term shareholder value via periodic liquidity events if certain conditions are met (see below for details).

• Reorganization of BlackRock Long-Term Municipal Advantage Trust (BTA) with and into BlackRock MuniAssets Fund, Inc. (MUA)

• Reorganizations of BlackRock MuniVest Fund, Inc. (MVF) and BlackRock MuniVest Fund II, Inc. (MVT) with and into BlackRock MuniYield Quality Fund III, Inc. (MYI)

• Reorganizations of BlackRock MuniYield Fund, Inc. (MYD), BlackRock MuniYield Quality Fund II, Inc. (MQT) and BlackRock Investment Quality Municipal Trust, Inc. (BKN) with and into BlackRock MuniYield Quality Fund, Inc. (MQY)

Six Muni CEFs have been reorganized into three acquiring funds:

BlackRock Municipal CEF Reorganizations Summary
Survivor Funds		Acquired Funds
MUA		BTA

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MYI		MVF		MVT
MQY		MYD		MQT		BKN

Fund		Ticker		Net Asset Value / Share ($)		Share Conversion Ratio
BlackRock Long-Term Municipal Advantage Trust		BTA		10.0395		0.88368101
BlackRock MuniAssets Fund, Inc.		MUA		11.3610		-

Fund		Ticker		Net Asset Value / Share ($)		Share Conversion Ratio
BlackRock MuniVest Fund, Inc.		MVF		7.5919		0.63218946
BlackRock MuniVest Fund II, Inc.		MVT		11.7926		0.98198836
BlackRock MuniYield Quality Fund III, Inc.		MYI		12.0089		-

Fund		Ticker		Net Asset Value / Share ($)		Share Conversion Ratio
BlackRock MuniYield Fund, Inc.		MYD		11.5454		0.92029684
BlackRock MuniYield Quality Fund II, Inc.		MQT		11.0544		0.88115868
BlackRock Investment Quality Municipal Trust, Inc.		BKN		12.3868		0.98736579
BlackRock MuniYield Quality Fund, Inc.		MQY		12.5453		-

The Reorganizations were based on the relative net asset values of each Fund’s common shares at the time of the applicable Reorganization.

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In the Reorganizations, common shareholders of each Acquired Fund received an amount of its respective Survivor Fund’s common shares equal to the aggregate NAV of their holdings of the Acquired Fund’s common shares as determined at the close of business on February 20, 2026. Fractional shares of each Survivor Fund’s common shares were not issued in the Reorganizations and consequently cash will be distributed for any such fractional shares.

In addition, each Acquired Fund’s preferred shareholders received on a one-for-one basis Survivor Fund preferred shares in an amount equal to the aggregate preferred share liquidation preference held by the Acquired Fund’s preferred shareholders immediately prior to the Reorganizations.

The Reorganizations are expected to be non-taxable events.

Discount Management Program (DMP)

Each of the Survivor Funds will participate in a DMP for 2026. Under the terms of each Fund’s DMP, each Fund intends to offer to repurchase a portion of its outstanding common shares via tender offer if certain conditions are met during the specified time period, as detailed below.

If a Fund’s common shares trade at an average daily discount to net asset value (“NAV”) of greater than 10.00% during the 9-month measurement period (the “Measurement Period”), the Fund intends to offer to repurchase, as soon as practicable following the Measurement Period end date, a minimum of 5% of its outstanding common shares at a price equal to 98% of the Fund’s NAV, as determined on the trading day after the tender offer expires.

Each DMP will be comprised of one Measurement Period, as detailed below, unless continued by a Fund’s Board of Directors/Trustees (each a “Board”). The Measurement Period start and end dates are currently expected to be as indicated below.

Measurement Period Start		Measurement Period End		Discount to NAV Trigger		Repurchase Amount		Price
January 1, 2026		September 30, 2026		More than -10.00%		Minimum of 5% of outstanding shares		98% of NAV

Each DMP is intended to enhance long-term shareholder value. However, even if a tender offer is triggered under a DMP, there is no guarantee that shareholders will be able to sell all of the shares that they desire to sell in any particular tender offer and there can be no assurances as to the effect that a DMP will have on the market for a Fund’s shares or the discount at which a Fund’s shares may trade relative to its NAV.

This communication is not intended to, and shall not, constitute an offer to purchase or sell shares of any of the Funds, including each Survivor Fund. Investors should consider a Survivor Fund’s investment objective, risks, charges and expenses carefully and consider in its entirety the applicable Joint Proxy Statement/Prospectus relating to a Reorganization, which contains important information regarding the investment objectives and policies, risks, charges, expenses and other important information about the applicable Survivor Fund.

About BlackRock

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BlackRock’s purpose is to help more and more people experience financial well-being. As a fiduciary to investors and a leading provider of financial technology, we help millions of people build savings that serve them throughout their lives by making investing easier and more affordable. For additional information on BlackRock, please visit www.blackrock.com/corporate.

Availability of Fund Updates

BlackRock will update performance and certain other data for the Funds on a monthly basis on its website in the “Closed-end Funds” section of www.blackrock.com as well as certain other material information as necessary from time to time. Investors and others are advised to check the website for updated performance information and the release of other material information about the Funds. This reference to BlackRock’s website is intended to allow investors public access to information regarding the Funds and does not, and is not intended to, incorporate BlackRock’s website in this release.

Forward-Looking Statements

This press release, and other statements that BlackRock or the Funds may make, may contain forward-looking statements within the meaning of the Private Securities Litigation Reform Act, with respect to the Funds or BlackRock’s future financial or business performance, strategies or expectations. Forward-looking statements are typically identified by words or phrases such as “trend,” “potential,” “opportunity,” “pipeline,” “believe,” “comfortable,” “expect,” “anticipate,” “current,” “intention,” “estimate,” “position,” “assume,” “outlook,” “continue,” “remain,” “maintain,” “sustain,” “seek,” “achieve,” and similar expressions, or future or conditional verbs such as “will,” “would,” “should,” “could,” “may” or similar expressions.

BlackRock cautions that forward-looking statements are subject to numerous assumptions, risks and uncertainties, which change over time. Forward-looking statements speak only as of the date they are made, and BlackRock assumes no duty to and does not undertake to update forward-looking statements. Actual results could differ materially from those anticipated in forward-looking statements and future results could differ materially from historical performance.

With respect to the Funds, the following factors, among others, could cause actual events to differ materially from forward-looking statements or historical performance: (1) changes and volatility in political, economic or industry conditions, the interest rate environment, foreign exchange rates or financial and capital markets, which could result in changes in demand for the Funds or a Fund’s net asset value; (2) the relative and absolute investment performance of the Funds and its investments; (3) the impact of increased competition; (4) the unfavorable resolution of any legal proceedings; (5) the extent and timing of any distributions or share repurchases; (6) the impact, extent and timing of technological changes; (7) the impact of legislative and regulatory actions and reforms, and regulatory, supervisory or enforcement actions of government agencies relating to the Funds or BlackRock, as applicable; (8) terrorist activities, international hostilities, health epidemics and/or pandemics and natural disasters, which may adversely affect the general economy, domestic and local financial and capital markets, specific industries or BlackRock; (9) BlackRock’s ability to attract and

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retain highly talented professionals; (10) the impact of BlackRock electing to provide support to its products from time to time; and (11) the impact of problems at other financial institutions or the failure or negative performance of products at other financial institutions.

Annual and Semi-Annual Reports and other regulatory filings of the Funds with the SEC are accessible on the SEC’s website at www.sec.gov and on BlackRock’s website at www.blackrock.com, and may discuss these or other factors that affect the Funds. The information contained on BlackRock’s website is not a part of this press release.

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FAQ

What funds were reorganized and into how many Survivor Funds (MVF)?

BlackRock reorganized six municipal closed-end funds into three Survivor Funds. The transaction matched common shares to Survivor Fund shares based on each Acquired Fund’s NAV as of February 20, 2026 with cash for fractional shares.

How were share conversion terms determined for the reorganizations (MVF)?

Conversion ratios were based on the relative net asset values of each Fund’s common shares at the time of each Reorganization. The filing lists NAV per share and share conversion ratios for each Acquired and Survivor Fund.

What triggers the Discount Management Program tender offer (MVF)?

A tender offer is intended if a Fund’s average daily discount to NAV exceeds 10.00% during the Measurement Period January 1–September 30, 2026. The Fund would then intend to repurchase at least 5% of outstanding shares at 98% of NAV.

Will preferred shareholders be affected by the reorganizations (MVF)?

Yes. Each Acquired Fund’s preferred shareholders received Survivor Fund preferred shares on a one-for-one basis equal to the aggregate preferred share liquidation preference they held immediately prior to the Reorganizations.

Are the reorganizations taxable events (MVF)?

The filing states the Reorganizations are expected to be non-taxable events. Tax consequences, if any, would depend on individual circumstances and the full Joint Proxy Statement/Prospectus referenced in the filing.