Insider transactions

Other acquisition or disposition (describe transaction)

• F1 The 1,536 Variable Rate Muni Term Preferred Shares (Shares) reported as disposed of in Table I represent shares that were beneficially owned by Toronto Dominion InvestmentsLLC (TDI). In connection with the reorganization of the Issuer into BlackRock MuniYield Quality Fund III, Inc. (MYI), the Shares were exchanged for an equal number of Variable Rate Demand Preferred Shares of MYI in a cashless transaction. TDI is a wholly owned indirect subsidiary of The Toronto-Dominion Bank (TD Bank).
• F2 This statement is jointly filed by TD Bank, TDI, Toronto Dominion Holdings (U.S.A.), Inc. (TDH), and TD Group US Holdings LLC (TD GUS). The Shares were owned directly by TDI. Toronto Dominion Holdings (U.S.A.), Inc. (TDH) is the sole owner of TDI and TD Group US Holdings LLC (TD GUS) is the sole owner of TDH. TD Bank is the sole owner of TD GUS. TD Bank, TDH, and TD GUS held an indirect interest in the Shares by virtue of their ownership of TDI.
• F3 Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) of the US Securities Exchange Act of 1934 or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer.

Other acquisition or disposition (describe transaction)

• F1 Effective as of February 23, 2026, BlackRock MuniVest Fund, Inc. (the Target Fund) was reorganized into BlackRock MuniYield Quality Fund III, Inc. (the Acquiring Fund). In the reorganization, common shareholders of the Target Fund received common shares of the Acquiring Fund having a value equal to the aggregate NAV of the Target Fund common shares surrendered as determined at the close of business on February 20, 2026, less the costs of the reorganization. As of February 20, 2026, the Target Fund reported a NAV per share of $7.5919 and the Acquiring Fund reported a NAV per share of $12.0089. The conversion ratio for the Target Fund's common shares was 0.63218946. In the reorganization, Michael Kalinoski received 1 common share (and cash for fractional shares, if any) of the Acquiring Fund in exchange for his 2.2247 common shares of the Target Fund.

Other acquisition or disposition (describe transaction)

• F1 A phantom share is the economic equivalent of one share of common stock and, subject to the applicable vesting requirements, becomes payable in cash.
• F2 Effective as of February 23, 2026, BlackRock MuniVest Fund, Inc. (the Target Fund) was reorganized into BlackRock MuniYield Quality Fund III, Inc. (the Acquiring Fund). In connection with this reorganization, phantom stock units previously awarded to Phillip Soccio in the Target Fund were reallocated to the Acquiring Fund, converted at the exchange ratio used in the reorganization.

Open market or private sale of non-derivative or derivative security

• F1 The variable rate muni term preferred shares reported as disposed of in Table I (the VMTP Shares) represent shares that were beneficially owned by DNT Asset Trust (DNT Trust). The VMTP Shares were disposed of as a result of a sale of the VMTP Shares in an open market transaction for a price of $100,173.1232878 per share. The 1,536 shares reported as disposed of in Table I represent shares that were beneficially owned by DNT Trust.
• F2 This statement is jointly filed by JPMorgan Chase Co. and DNT Trust. JPMorgan Chase Co. holds an indirect interest in the securities listed in Table I by virtue of its indirect ownership of its subsidiary DNT Trust.
• F3 Each reporting person declares that neither the filing of this statement nor anything herein shall be construed as an admission that such person is, for the purposes of Section 13(d) of the US Securities Exchange Act of 1934 or any other purpose, (i) acting (or has agreed or is agreeing to act together with any other person) as a partnership, limited partnership, syndicate or other group for the purpose of acquiring, holding or disposing of securities of the Issuer or otherwise with respect to the Issuer or any securities of the Issuer or (ii) a member of any group with respect to the Issuer or any securities of the Issuer.

Exercise or conversion of derivative security exempted pursuant to Rule 16b-3

• F1 A phantom share is the economic equivalent of one share of common stock and, subject to the applicable vesting requirements, becomes payable in cash.
• F2 As previously reported on a Form 4 dated February 4, 2025, the Reporting Person was granted phantom shares on January 31, 2025 payable in cash on vesting, which occurs in equal installments on each of the first three anniversaries of the grant date.

Disposition to the issuer of issuer equity securities pursuant to Rule 16b-3(e)

• F1 A phantom share is the economic equivalent of one share of common stock and, subject to the applicable vesting requirements, becomes payable in cash.
• F2 As previously reported on a Form 4 dated February 4, 2025, the Reporting Person was granted phantom shares on January 31, 2025 payable in cash on vesting, which occurs in equal installments on each of the first three anniversaries of the grant date.

Exercise or conversion of derivative security exempted pursuant to Rule 16b-3

• F1 A phantom share is the economic equivalent of one share of common stock and, subject to the applicable vesting requirements, becomes payable in cash.
• F2 As previously reported on a Form 4 dated February 4, 2025, the Reporting Person was granted phantom shares on January 31, 2025 payable in cash on vesting, which occurs in equal installments on each of the first three anniversaries of the grant date.