# UMBS, TBA Uniform Mortgage-Backed Security, TBA

UMBS, TBA Uniform Mortgage-Backed Security, TBA is a security (CUSIP 01F032641) tracked across SEC portfolio filings. 24 registered fund positions totaling $1.7B via N-PORT as of 2026-03-31.

## Summary

- Issuer: UMBS, TBA
- Class: Uniform Mortgage-Backed Security, TBA
- CUSIP: 01F032641
- Asset category: ABS-MBS
- 13F holders: 0
- N-PORT fund positions: 24
- N-PORT value: $1.7B
- N-PORT report: 2026-03-31

## Top fund holders (N-PORT)

_Showing 15 of 24 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [TCW METWEST TOTAL RETURN BOND FUND](https://search.stillhousedata.com/fund/S000001147) | TCW Metropolitan West Funds | $830.4M | 279.63% |
| [BlackRock Total Return Fund](https://search.stillhousedata.com/fund/S000004071) | BlackRock Bond Fund, Inc. | $575.1M | 323.29% |
| [Capital World Bond Fund](https://search.stillhousedata.com/fund/S000009240) | Capital World Bond Fund | $98.0M | 99.96% |
| [Pioneer Bond Fund](https://search.stillhousedata.com/fund/S000003927) | Pioneer Bond Fund /DE/ | $89.3M | 180.16% |
| BlackRock Capital Allocation Term Trust | BlackRock Capital Allocation Term Trust | $69.2M | 462.80% |
| [BlackRock Total Return V.I. Fund](https://search.stillhousedata.com/fund/S000062377) | BlackRock Variable Series Funds II, Inc. | $28.2M | 287.82% |
| [Putnam Mortgage Securities Fund](https://search.stillhousedata.com/fund/S000006570) | Putnam Mortgage Securities Fund | $22.0M | 569.20% |
| [BlackRock Strategic Global Bond Fund, Inc.](https://search.stillhousedata.com/fund/S000002866) | BlackRock Strategic Global Bond Fund, Inc. | $20.5M | 233.78% |
| BlackRock ESG Capital Allocation Term Trust | BlackRock ESG Capital Allocation Term Trust | $13.6M | 93.81% |
| [DoubleLine Mortgage ETF](https://search.stillhousedata.com/fund/S000080055) | DoubleLine ETF Trust | $10.3M | 147.82% |
| TCW STRATEGIC INCOME FUND INC | TCW STRATEGIC INCOME FUND INC | $9.9M | 318.44% |
| [Putnam Diversified Income Trust](https://search.stillhousedata.com/fund/S000005529) | Putnam Diversified Income Trust | $6.4M | 69.77% |
| [BATS: High Income Taxable Series](https://search.stillhousedata.com/fund/S000084041) | BlackRock Allocation Target Shares | $6.3M | 665.02% |
| [HARTFORD TOTAL RETURN BOND HLS FUND](https://search.stillhousedata.com/fund/S000003222) | HARTFORD SERIES FUND INC | $4.1M | 30.43% |
| [T. Rowe Price Balanced Fund, Inc.](https://search.stillhousedata.com/fund/S000002068) | T. Rowe Price Balanced Fund, Inc. | $3.5M | 6.98% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/01F032641.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.