| 4 | Statement of changes in beneficial owner... | | Blackrock Municipal Credit Alpha Portfolio, Inc. | 05/12/2026 | |
| 4 | Statement of changes in beneficial owner... | | Blackrock Municipal Credit Alpha Portfolio, Inc. | 05/04/2026 | |
| N-23C3A | Notification of periodic repurchase offe... | Blackrock Municipal Credit Alpha Portfolio, Inc. | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 04/08/2026 | |
| N-CSRS | Certified semi-annual shareholder report... | Blackrock Municipal Credit Alpha Portfolio, Inc. | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 04/07/2026 | |
| NPORT-P | Monthly Portfolio Investments Report on ... | | State Street Bank & Trust CO Fund Admin Dept. /fa | 03/26/2026 | |
| N-23C-2 | Notice by closed-end investment companie... | | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 02/27/2026 | |
| N-23C3A | Notification of periodic repurchase offe... | Blackrock Municipal Credit Alpha Portfolio, Inc. | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 01/08/2026 | |
| NPORT-P | Monthly Portfolio Investments Report on ... | | State Street Bank & Trust CO Fund Admin Dept. /fa | 12/29/2025 | |
| 486BPOS | Post-effective amendment to filing filed... | BlackRock Municipal Credit Alpha Portfolio, Inc. , BlackRock Municipal Credit Alpha Portfolio, Inc. | DONNELLEY FINANCIAL SOLUTIONS /FA/ | 11/26/2025 | |
| 4 | Statement of changes in beneficial owner... | | Blackrock Municipal Credit Alpha Portfolio, Inc. | 11/12/2025 | |
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