# United States Treasury Inflation Indexed Bonds TSY INFL IX N/B

United States Treasury Inflation Indexed Bonds TSY INFL IX N/B is a security (CUSIP 9128285W6) tracked across SEC portfolio filings. 17 registered fund positions totaling $2.8B via N-PORT as of 2026-05-31.

## Summary

- Issuer: United States Treasury Inflation Indexed Bonds
- Class: TSY INFL IX N/B
- CUSIP: 9128285W6
- Asset category: SN
- 13F holders: 0
- N-PORT fund positions: 17
- N-PORT value: $2.8B
- N-PORT report: 2026-05-31

## Top fund holders (N-PORT)

_Showing 15 of 17 fund positions by value._

| Fund | Registrant | Value | % of fund |
| --- | --- | --- | --- |
| [VANGUARD SHORT-TERM INFLATION-PROTECTED SECURITIES INDEX FUND](https://search.stillhousedata.com/fund/S000038501) | VANGUARD MALVERN FUNDS | $2.1B | 325.32% |
| [T. Rowe Price Limited-Duration Inflation Focused Bond Fund, Inc.](https://search.stillhousedata.com/fund/S000013369) | T. ROWE PRICE LIMITED-DURATION INFLATION FOCUSED BOND FUND, INC. | $302.3M | 295.06% |
| [T. Rowe Price U.S. Limited Duration TIPS Index Fund](https://search.stillhousedata.com/fund/S000069930) | T. ROWE PRICE INDEX TRUST, INC. | $107.2M | 400.35% |
| [American Funds Inflation Linked Bond Fund](https://search.stillhousedata.com/fund/S000039115) | American Funds Inflation Linked Bond Fund | $88.3M | 66.91% |
| [Short Duration Inflation Protection Bond Fund](https://search.stillhousedata.com/fund/S000006581) | American Century Investment Trust | $23.5M | 198.90% |
| [Loomis Sayles Inflation Protected Securities Fund](https://search.stillhousedata.com/fund/S000006643) | LOOMIS SAYLES FUNDS I | $21.8M | 2051.52% |
| [Fidelity Inflation-Protected Bond Index Central Fund](https://search.stillhousedata.com/fund/S000036933) | Fidelity Central Investment Portfolios II LLC | $20.2M | 256.30% |
| [Short Duration Inflation-Protected Income Portfolio](https://search.stillhousedata.com/fund/S000077078) | Short Duration Inflation-Protected Income Portfolio | $20.2M | 480.04% |
| Western Asset Inflation-Linked Opportunities & Income Fund | Western Asset Inflation-Linked Opportunities & Income Fund | $18.1M | 308.73% |
| [T. Rowe Price Inflation Protected Bond Fund, Inc.](https://search.stillhousedata.com/fund/S000002133) | T. ROWE PRICE INFLATION PROTECTED BOND FUND, INC. | $13.9M | 241.61% |
| Western Asset Inflation-Linked Income Fund | Western Asset Inflation-Linked Income Fund | $7.7M | 366.21% |
| [SIMT Multi-Asset Accumulation Fund](https://search.stillhousedata.com/fund/S000035779) | SEI INSTITUTIONAL MANAGED TRUST | $6.0M | 52.13% |
| [VP Inflation Protection Fund](https://search.stillhousedata.com/fund/S000006680) | American Century Variable Portfolios II, Inc. | $5.2M | 94.22% |
| [PGIM TIPS Fund](https://search.stillhousedata.com/fund/S000055767) | Prudential Investment Portfolios 2 | $4.2M | 798.87% |
| [Timothy Plan Defensive Strategies Fund](https://search.stillhousedata.com/fund/S000026812) | TIMOTHY PLAN | $1.3M | 119.96% |

## More

- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/security/9128285W6.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.