# BlackRock Municipal Income Investment Trust

BlackRock Municipal Income Investment Trust (CIK 1137392) is an SEC-registered fund company and $149.9M in net assets as of 2021-01-31.

## Registrant

- CIK: 1137392
- File number: 811-10333
- LEI: A2HHML4IABXGDVD17F46
- Address: 100 Bellevue Parkway, Wilmington, US-DE, 19809
- Phone: 800-441-7762
- Net assets: $149.9M
- Total assets: $238.5M
- Latest report: 2021-01-31

## Fund series (1)

| Series | Net assets |
| --- | --- |
| BlackRock Municipal Income Investment Trust | $149.9M |

## Largest reported holdings (across all series)

| Holding | Value |
| --- | --- |
| [County of Miami-Dade Seaport Department](https://search.stillhousedata.com/security/59335KAT4) | $6.5M |
| [New York City Transitional Finance Authority Future Tax Secured Revenue](https://search.stillhousedata.com/security/64971XNN4) | $5.9M |
| [County of Lehigh PA](https://search.stillhousedata.com/security/52480GDW1) | $5.8M |
| [Metropolitan Washington Airports Authority Dulles Toll Road Revenue](https://search.stillhousedata.com/security/592643DH0) | $5.8M |
| [Main Street Natural Gas Inc](https://search.stillhousedata.com/security/56035DBW1) | $3.6M |
| [New York Liberty Development Corp](https://search.stillhousedata.com/security/649519BV6) | $3.5M |
| [Puerto Rico Sales Tax Financing Corp Sales Tax Revenue](https://search.stillhousedata.com/security/74529JPX7) | $3.4M |
| [New York City Housing Development Corp](https://search.stillhousedata.com/security/64972ETT6) | $3.4M |
| [Michigan State Housing Development Authority](https://search.stillhousedata.com/security/59465M4N2) | $3.2M |
| [Tobacco Settlement Financing Corp/RI](https://search.stillhousedata.com/security/888809BF6) | $3.1M |
| [BlackRock Liquidity Funds](https://search.stillhousedata.com/security/09248U841) | $3.0M |
| [Duluth Economic Development Authority](https://search.stillhousedata.com/security/26444CHB1) | $3.0M |
| [Port Authority of New York & New Jersey](https://search.stillhousedata.com/security/73358W3M4) | $2.9M |
| [Tobacco Settlement Financing Corp](https://search.stillhousedata.com/security/888808HT2) | $2.9M |
| [Cook County Community College District No 508](https://search.stillhousedata.com/security/213187CL9) | $2.9M |

## More

- [CIK 1137392 on SEC EDGAR (source of record)](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=1137392&type=&dateb=&owner=include&count=40)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/registrant/1137392.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

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Source: public SEC filing data via Adviser Search (https://search.stillhousedata.com).
Agents: this data is also queryable via MCP tools and read-only SQL — see https://search.stillhousedata.com/llms.txt.