# MASTR ADJUSTABLE RATE MORTGAGES TRUST 2004-12 MARM 2004-12 5A1

MASTR ADJUSTABLE RATE MORTGAGES TRUST 2004-12 MARM 2004-12 5A1 is a security (CUSIP 576433UC8) tracked across SEC portfolio filings. 1 registered fund positions totaling $2K via N-PORT as of 2026-03-31.

## Summary

- Issuer: MASTR ADJUSTABLE RATE MORTGAGES TRUST 2004-12
- Class: MARM 2004-12 5A1
- CUSIP: 576433UC8
- Asset category: ABS-O
- 13F holders: 0
- N-PORT fund positions: 1
- N-PORT value: $2K
- N-PORT report: 2026-03-31

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| Western Asset Mortgage Opportunity Fund Inc. | Western Asset Mortgage Opportunity Fund Inc. | $2K | 0.18% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/576433UC8.md)
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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.