SCHEDULE 13D/A 0000019617 XXXXXXXX LIVE 1 VARIABLE RATE MUNI TERM PREFERRED SHARES 02/23/2026 false 0000894242 09247D600 BLACKROCK INVESTMENT QUALITY MUNICIPAL TRUST, INC.

100 Bellevue Parkway Wilmington DE 19809

Michael Lees (212) 270-6000 JPMorgan Chase & Co. 270 Park Avenue New York NY 10017 0000019617 N JPMorgan Chase & Co. OO Y DE 0 0 0 0 0 N 0 HC CO 0002005954 N DNT Asset Trust OO N DE 0 0 0 0 0 N 0 OO VARIABLE RATE MUNI TERM PREFERRED SHARES BLACKROCK INVESTMENT QUALITY MUNICIPAL TRUST, INC. 100 Bellevue Parkway Wilmington DE 19809 This Amendment No. 1 (this "Amendment") amends, as set forth below, the statement on Schedule 13D, dated December 20, 2023 and filed with the SEC on January 2, 2024 (the "Original Schedule 13D"), for JPMorgan Chase & Co. ("JPMC") and DNT Asset Trust ("DNT Trust") (collectively, the "Reporting Persons") with respect to certain Variable Rate Muni Term Preferred Shares ("Preferred Shares") of BLACKROCK INVESTMENT QUALITY MUNICIPAL TRUST, INC. (the "Issuer"). This Amendment is being filed as a result of the reorganization of the Issuer into BlackRock MuniYield Quality Fund, Inc. ("MQT") on February 23, 2026 (the "Reorganization") pursuant to which DNT Trust exchanged its 678 Preferred Shares of the Issuer (CUSIP No. 09247D600) for an equal number of Series W-7B Variable Rate Demand Preferred Shares of MQT. This information is not changed by this Amendment. This information is not changed by this Amendment. Item 2 of the Original Schedule 13D is hereby amended by deleting Schedule A and Schedule B referenced therein and replacing them with Schedule A and Schedule B included with this Amendment and attached as an Exhibit hereto. Item 2 of the Original Schedule 13D is hereby amended by deleting Schedule A and Schedule B referenced therein and replacing them with Schedule A and Schedule B included with this Amendment and attached as an Exhibit hereto. Item 2 of the Original Schedule 13D is hereby amended by deleting Schedule A and Schedule B referenced therein and replacing them with Schedule A and Schedule B included with this Amendment and attached as an Exhibit hereto. Item 2 of the Original Schedule 13D is hereby amended by deleting Schedule A and Schedule B referenced therein and replacing them with Schedule A and Schedule B included with this Amendment and attached as an Exhibit hereto. Item 3 of the Original Schedule 13D is hereby amended by adding the following paragraph at the end thereof: "In connection with the Reorganization of the Issuer into MQT, DNT Trust exchanged its 678 Preferred Shares of the Issuer (CUSIP No. 09247D600) for an equal number of Series W-7B Variable Rate Demand Preferred Shares of MQT. As a result of the Reorganization, the Reporting Persons no longer own any Preferred Shares Item 4 of the Original Schedule 13D is hereby amended by adding the following paragraph at the end thereof: "As a result of the Reorganization, the Reporting Persons no longer own any Preferred Shares of the Issuer." This information is not changed by this Amendment. This information is not changed by this Amendment. This information is not changed by this Amendment. Item 5(d) of the Original Schedule 13D is hereby amended by deleting paragraph (d) therein and replacing it in its entirety with the following: "(d) Not applicable." Item 5(e) of the Original Schedule 13D is hereby amended by deleting paragraph (e) therein and replacing it in its entirety with the following: "(e) On February 23, 2026, as a result of the Reorganization, the Reporting Persons ceased to be the beneficial owner of more than five percent of the class of securities." Item 6 of the Original Schedule 13D is hereby deleted and replaced in its entirety with the following: "The responses of the Reporting Persons under Item 3 and Item 4 hereof are incorporated herein by reference. All voting arrangements and financing arrangements relating to the Issuer's Preferred Shares have been terminated as a result of the exchange of the Preferred Shares." Item 7 of the Original Schedule 13D is hereby amended by deleting Exhibit 99.1 thereto and inserting the following exhibits in its place: "Exhibit Description of Exhibit 99.1 Joint Filing Agreement" Item 7 of the Original Schedule 13D is hereby further amended by adding the following Exhibit to the listings of exhibits to be attached to this Schedule 13D: "Exhibit Description of Exhibit 99.5 Amended and Restated Schedule A and Schedule B" JPMorgan Chase & Co. /s/ Michael Lees 02/26/2026 DNT Asset Trust /s/ Tim A. Self 02/26/2026 Please note that Item 2 of the Original Schedule 13D is hereby amended by deleting Schedule A and Schedule B referenced therein and replacing them with the amended and restated Schedule A and Schedule B attached to this Amendment.