UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 14A INFORMATION

Proxy Statement Pursuant to Section 14(a) of the

Securities Exchange Act of 1934

Filed by the Registrant  ☒
Filed by a Party other than the Registrant  ☐
Check the appropriate box:
☐   Preliminary Proxy Statement	☐	Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))
☐   Definitive Proxy Statement
☒   Definitive Additional Materials
☐   Soliciting Material Pursuant to § 240.14a-12

BLACKROCK MUNICIPAL INCOME QUALITY TRUST

(Name of Registrant as Specified In Its Charter)

(Name of Person(s) Filing Proxy Statement, if Other than the Registrant)

Payment of Filing Fee (Check the appropriate box):

☒	No fee required.
☐	Fee paid previously with preliminary materials.
☐	Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

Your Vote Matters BlackRock Municipal Closed - End Funds Vote now to reduce costs for your Fund and to stop receiving solicitation notices Why am I receiving this letter? You are a shareholder of one or more of the following funds and entitled to vote at the upcoming special shareholder meeting on October 15 , 2025 : BlackRock Municipal Income Trust II (BLE) BlackRock Municipal Income Quality Trust (BYM) BlackRock Municipal Income Trust (BFK) BlackRock MuniHoldings Quality Fund II, Inc. (MUE) BlackRock MuniHoldings Fund, Inc. (MHD) What am I voting on? Shareholders are being asked to approve combining the funds to realize potential benefits for you as a shareholder, including: Lower expenses, ranking in the 1st quartile among peers Enhanced trading on exchange Implem entation of a discount management program How do the Boards recommend that I vote ? The Board of each Fund unanimously recommends that you vote “FOR” each applicable Proposal . If you have any questions on how to vote or about the proposals to be voted on, please contact Georgeson LLC at 1-833-880-8840 . Theproxymaterialspreviouslysenttoyoucontainimportantinformation; pleasereadthem carefully.CopiesoftheProxyStatementareavailableforfreeontheSecuritiesandExchange Commission’swebsiteatwww.sec.govorbyvisitingWWW.PROXY-DIRECT.COM/BLK-34667 orbycallingGeorgesonLLC,theFunds’proxysolicitor,tollfreeat1-833-880-8840. Voting is simple Vote online By scanning the QR code orusing the website provided on the enclosed proxy card or voting instruction form Vote by phone By calling the toll-free number on theen closed proxy card or voting instruction form or downloading the ProxyVote app Vote b y mail By completing and returning the enclosed proxy card or voting instruction form in the pre-paid envelope provided BlackRock.