{"url_path":"/sec/cik-0002049595/10-q/2026/cover-page","section_key":"cover-page","section_title":"Cover Page","topic":"sec","document":{"doc_type":"10-Q/A","doc_date":"2026-05-20","source_url":"https://www.sec.gov/Archives/edgar/data/2049595/0001193125-26-232634-index.html","accession_number":"0001193125-26-232634","cik":"0002049595","ticker":null,"issuer_name":"BlackRock Monticello Debt Real Estate Investment Trust","edgar_url":"https://www.sec.gov/Archives/edgar/data/2049595/0001193125-26-232634-index.html","primary_entity_key":"0002049595","primary_entity_name":"BlackRock Monticello Debt Real Estate Investment Trust"},"word_count":484,"has_tables":true,"body_markdown":"10-Q/A\n\ntrueQ1--12-310002049595NY 0002049595 2026-01-01 2026-03-31 0002049595 ck0002049595:CommonClassSMember 2026-05-05 0002049595 ck0002049595:CommonClassTMember 2026-05-05 0002049595 ck0002049595:CommonClassDMember 2026-05-05 0002049595 ck0002049595:CommonClassIMember 2026-05-05 0002049595 ck0002049595:CommonClassFDMember 2026-05-05 0002049595 ck0002049595:CommonClassEMember 2026-05-05 0002049595 ck0002049595:CommonClassFiMember 2026-05-05 0002049595 ck0002049595:CommonClassFsMember 2026-05-05 xbrli:shares\n\n \n\n \n\nUNITED STATES\n\nSECURITIES AND EXCHANGE COMMISSION\n\nWASHINGTON, D.C. 20549\n\n \n\n \n\nFORM\n10-Q/A\n\n(Amendment No. 1)\n\n \n\n \n\n(Mark One)\n\n☒\n\nQUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934\n\nFor the quarterly period ended March 31, 2026\n\nOR\n\n \n\n☐\n\nTRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934\n\nFor the Transition period from\n     \nto\n     \n.\n\nCommission file number\n000-56720\n\n \n\n \n\nBlackRock Monticello Debt Real Estate Investment Trust\n\n(Exact name of Registrant as specified in Its Charter)\n\n \n\n \n\n \n\nMaryland\n\n \n\n50 Hudson Yards\n\nNew York,\nNY\n10001\n\n \n\n33-6595754\n\n(State or other jurisdiction of\n\nincorporation or organization)\n\n \n\n(Address of principal executive offices) (Zip Code)\n\n \n\n(I.R.S. Employer\n\nIdentification No.)\n\nRegistrant’s telephone number, including area code: (212)\n810-5300\n\n \n\n \n\nSecurities registered pursuant to Section 12(b) of the Act: None\n\n \n\nTitle of each class\n\n \n\nTrading\n\nSymbol(s)\n\n \n\nName of each exchange\non which registered\n\n \n\n \n\n \n\n  \n\nIndicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes ☒ No ☐\n\nIndicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation\nS-T\n(§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒ No ☐\n\nIndicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a\nnon-accelerated\nfiler, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and “emerging growth company” in Rule\n12b-2\nof the Exchange Act.\n\n \n\nLarge accelerated filer\n \n☐\n  \nAccelerated filer\n \n☐\n\nNon-accelerated filer\n\n \n☒\n  \nSmaller reporting company\n \n☒\n\n \n\n  \nEmerging growth company\n \n☒\n\nIf an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐\n\nIndicate by check mark whether the registrant is a shell company (as defined in Rule\n12b-2\nof the Act). Yes ☐ No ☒\n\nAs of May 5, 2026, the registrant had the following shares outstanding: 347,110 Class E common shares, 5,600,925\nClass F-I\ncommon shares,\nand\n2,745,561\nClass F-S\ncommon shares. There are no outstanding Class S common shares, Class T common shares, Class D common shares, Class I common shares, or\nClass F-D\ncommon shares.\n\n \n\n \n\n \n\nTABLE OF CONTENTS\n\n \n\nEXPLANATORY NOTE\n\n  \n\nPART II.\n\n \n\n[OTHER INFORMATION](#toc112449_1)\n\n  \n \n2"}