# UMBS, TBA Uniform Mortgage-Backed Security, TBA

UMBS, TBA Uniform Mortgage-Backed Security, TBA is a security (CUSIP 01F020448) tracked across SEC portfolio filings. 11 registered fund positions totaling $170.3M via N-PORT as of 2026-03-31.

## Summary

- Issuer: UMBS, TBA
- Class: Uniform Mortgage-Backed Security, TBA
- CUSIP: 01F020448
- Asset category: ABS-MBS
- 13F holders: 0
- N-PORT fund positions: 11
- N-PORT value: $170.3M
- N-PORT report: 2026-03-31

## Top fund holders (N-PORT)

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [GENERAL ELECTRIC RSP INCOME FUND](https://search.stillhousedata.com/fund/S000011837) | GENERAL ELECTRIC RSP INCOME FUND | $75.9M | 387.27% |
| [American Balanced Fund](https://search.stillhousedata.com/fund/S000008801) | American Balanced Fund | $66.1M | 2.50% |
| [Bond Fund of America](https://search.stillhousedata.com/fund/S000009231) | Bond Fund of America | $21.5M | 2.16% |
| [Putnam Mortgage Securities Fund](https://search.stillhousedata.com/fund/S000006570) | Putnam Mortgage Securities Fund | $16.6M | 428.42% |
| [Six Circles Global Bond Fund](https://search.stillhousedata.com/fund/S000068181) | SIX CIRCLES TRUST | $8.8M | 5.16% |
| [Pioneer Bond Fund](https://search.stillhousedata.com/fund/S000003927) | Pioneer Bond Fund /DE/ | $2.7M | 5.47% |
| [BlackRock Balanced Portfolio](https://search.stillhousedata.com/fund/S000003863) | BlackRock Series Fund, Inc. | $1.1M | 24.69% |
| [BlackRock Strategic Global Bond Fund, Inc.](https://search.stillhousedata.com/fund/S000002866) | BlackRock Strategic Global Bond Fund, Inc. | $1.1M | 12.37% |
| PIMCO Strategic Income Fund, Inc. | PIMCO Strategic Income Fund, Inc. | $-184K | -8.64% |
| [PIMCO Global Managed Asset Allocation Portfolio](https://search.stillhousedata.com/fund/S000024339) | PIMCO Variable Insurance Trust | $-3.2M | -116.55% |
| [BlackRock Total Return Fund](https://search.stillhousedata.com/fund/S000004071) | BlackRock Bond Fund, Inc. | $-20.1M | -11.32% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/01F020448.md)
- [Search all SEC filings, advisers and people on Adviser Search](https://search.stillhousedata.com/)

---

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.