| NPORT-P | Monthly Portfolio Investments Report on ... | | State Street Bank & Trust CO Fund Admin Dept. /fa | 04/23/2026 | |
| N-CSRS | Certified semi-annual shareholder report... | Blackrock Municipal Series Trust | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 02/04/2026 | |
| NPORT-P | Monthly Portfolio Investments Report on ... | | State Street Bank & Trust CO Fund Admin Dept. /fa | 01/23/2026 | |
| 497 | Definitive materials filed under paragra... | Blackrock Municipal Series Trust | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 12/01/2025 | |
| NPORT-P | Monthly Portfolio Investments Report on ... | | State Street Bank & Trust CO Fund Admin Dept. /fa | 10/27/2025 | |
| 497K | Summary Prospectus for certain open-end ... | Blackrock Municipal Series Trust | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 10/01/2025 | |
| 497K | Summary Prospectus for certain open-end ... | Blackrock Municipal Series Trust | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 10/01/2025 | |
| 497K | Summary Prospectus for certain open-end ... | Blackrock Municipal Series Trust | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 10/01/2025 | |
| 497J | Certification of no change in definitive... | Blackrock Municipal Series Trust | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 09/29/2025 | |
| 485BPOS | Post-effective amendment filed pursuant ... | BLACKROCK MUNICIPAL SERIES TRUST , BLACKROCK MUNICIPAL SERIES TRUST | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 09/23/2025 | |
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