# UMBS, TBA Uniform Mortgage-Backed Security, TBA

UMBS, TBA Uniform Mortgage-Backed Security, TBA is a security (CUSIP 01F050445) tracked across SEC portfolio filings. 4 registered fund positions totaling $47.0M via N-PORT as of 2026-03-31.

## Summary

- Issuer: UMBS, TBA
- Class: Uniform Mortgage-Backed Security, TBA
- CUSIP: 01F050445
- Asset category: ABS-MBS
- 13F holders: 0
- N-PORT fund positions: 4
- N-PORT value: $47.0M
- N-PORT report: 2026-03-31

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [LORD ABBETT BOND DEBENTURE FUND INC](https://search.stillhousedata.com/fund/S000006820) | LORD ABBETT BOND DEBENTURE FUND INC | $33.4M | 14.60% |
| [TCW METWEST LOW DURATION BOND FUND](https://search.stillhousedata.com/fund/S000001146) | TCW Metropolitan West Funds | $11.3M | 126.13% |
| [MML VIP Fidelity Institutional AM Core Plus Bond Fund](https://search.stillhousedata.com/fund/S000029642) | MML SERIES INVESTMENT FUND | $2.1M | 57.06% |
| [Short Duration Income Portfolio](https://search.stillhousedata.com/fund/S000045029) | LORD ABBETT SERIES FUND INC | $285K | 18.15% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/01F050445.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.