# US TREASURY N/B United States Treasury Note/Bond

US TREASURY N/B United States Treasury Note/Bond is a security (CUSIP 912810SF6) tracked across SEC portfolio filings. 20 registered fund positions totaling $414.6M via N-PORT as of 2026-05-31.

## Summary

- Issuer: US TREASURY N/B
- Class: United States Treasury Note/Bond
- CUSIP: 912810SF6
- Asset category: DBT
- 13F holders: 0
- N-PORT fund positions: 20
- N-PORT value: $414.6M
- N-PORT report: 2026-05-31

## Top fund holders (N-PORT)

_Showing 15 of 20 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [Master Total Return Portfolio](https://search.stillhousedata.com/fund/S000004067) | Master Bond LLC | $87.7M | 46.52% |
| [Capital Income Builder](https://search.stillhousedata.com/fund/S000009000) | Capital Income Builder | $81.6M | 6.43% |
| [Calvert Bond Fund](https://search.stillhousedata.com/fund/S000008718) | Calvert Social Investment Fund | $79.6M | 187.80% |
| [BlackRock Total Return Fund](https://search.stillhousedata.com/fund/S000004071) | BlackRock Bond Fund, Inc. | $39.2M | 22.04% |
| [VANGUARD BALANCED INDEX FUND](https://search.stillhousedata.com/fund/S000002560) | VANGUARD VALLEY FORGE FUNDS | $28.6M | 4.86% |
| [Select Bond Portfolio](https://search.stillhousedata.com/fund/S000000047) | NORTHWESTERN MUTUAL SERIES FUND INC | $24.7M | 87.13% |
| [Allspring Core Plus Bond Fund](https://search.stillhousedata.com/fund/S000007418) | ALLSPRING FUNDS TRUST | $23.8M | 21.77% |
| [AB Core Bond Portfolio](https://search.stillhousedata.com/fund/S000011057) | BERNSTEIN SANFORD C FUND INC | $19.7M | 44.03% |
| [George Putnam Balanced Fund](https://search.stillhousedata.com/fund/S000005597) | George Putnam Balanced Fund | $12.2M | 52.04% |
| [Putnam Multi-Asset Income Fund](https://search.stillhousedata.com/fund/S000067964) | Putnam Asset Allocation Funds | $3.6M | 40.58% |
| [Six Circles Global Bond Fund](https://search.stillhousedata.com/fund/S000068181) | SIX CIRCLES TRUST | $3.2M | 1.86% |
| [PGIM Absolute Return Bond Fund](https://search.stillhousedata.com/fund/S000031707) | Prudential Investment Portfolios 9 | $2.9M | 8.49% |
| [College Retirement Equities Fund - Responsible Balanced Account](https://search.stillhousedata.com/fund/S000005086) | College Retirement Equities Fund | $1.8M | 0.89% |
| [AB UNCONSTRAINED BOND FUND, INC.](https://search.stillhousedata.com/fund/S000010071) | AB UNCONSTRAINED BOND FUND, INC. | $1.5M | 238.35% |
| [Bond Fund of America](https://search.stillhousedata.com/fund/S000009231) | Bond Fund of America | $1.4M | 0.14% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/912810SF6.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.