# UMBS, TBA Uniform Mortgage-Backed Security, TBA

UMBS, TBA Uniform Mortgage-Backed Security, TBA is a security (CUSIP 01F042442) tracked across SEC portfolio filings. 10 registered fund positions totaling $133.3M via N-PORT as of 2026-03-31.

## Summary

- Issuer: UMBS, TBA
- Class: Uniform Mortgage-Backed Security, TBA
- CUSIP: 01F042442
- Asset category: ABS-MBS
- 13F holders: 0
- N-PORT fund positions: 10
- N-PORT value: $133.3M
- 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 | $40.5M | 17.71% |
| [BlackRock Total Return Fund](https://search.stillhousedata.com/fund/S000004071) | BlackRock Bond Fund, Inc. | $39.0M | 21.90% |
| [Select Bond Portfolio](https://search.stillhousedata.com/fund/S000000047) | NORTHWESTERN MUTUAL SERIES FUND INC | $18.7M | 65.79% |
| [MML Managed Bond Fund](https://search.stillhousedata.com/fund/S000003834) | MML Series Investment Fund II | $15.7M | 225.10% |
| [TCW METWEST LOW DURATION BOND FUND](https://search.stillhousedata.com/fund/S000001146) | TCW Metropolitan West Funds | $10.2M | 113.74% |
| [Six Circles Global Bond Fund](https://search.stillhousedata.com/fund/S000068181) | SIX CIRCLES TRUST | $6.7M | 3.97% |
| [THRIVENT CONSERVATIVE ALLOCATION PORTFOLIO](https://search.stillhousedata.com/fund/S000001434) | Thrivent Series Fund, Inc. | $1.4M | 24.63% |
| [BlackRock Strategic Global Bond Fund, Inc.](https://search.stillhousedata.com/fund/S000002866) | BlackRock Strategic Global Bond Fund, Inc. | $817K | 9.33% |
| [Short Duration Income Portfolio](https://search.stillhousedata.com/fund/S000045029) | LORD ABBETT SERIES FUND INC | $383K | 24.39% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | — | 0.00% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/01F042442.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.