# VANGUARD 0-3 MONTH TREASURY BILL ETF

VANGUARD 0-3 MONTH TREASURY BILL ETF is a ETF series of VANGUARD INSTITUTIONAL INDEX FUNDS (series S000090172). Net assets $6.7B as of 2026-03-31. Index fund.

## Profile

- Series ID: S000090172
- Registrant: VANGUARD INSTITUTIONAL INDEX FUNDS
- LEI: 52990070DGBTWFWX8S21
- Net assets: $6.7B
- Total assets: $6.7B
- As of: 2026-03-31
- Type: ETF, Index

## Advisers

- [The Vanguard Group, Inc. (Advisor)](https://search.stillhousedata.com/firm/105958)

## Top holdings (27 reported)

_Showing 15 of 27 holdings by value._

| Holding | Ticker | Value | % of fund |
| --- | --- | --- | --- |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797QD2) | — | $425.5M | 637.92% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797TG2) | — | $380.9M | 570.98% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797TH0) | — | $369.8M | 554.45% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797TK3) | — | $365.6M | 548.11% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797TJ6) | — | $364.9M | 547.07% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797SM0) | — | $354.9M | 532.00% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797SN8) | — | $353.5M | 529.93% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797SD0) | — | $349.0M | 523.25% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797SL2) | — | $343.8M | 515.46% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797SP3) | — | $342.8M | 513.98% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797QN0) | — | $298.3M | 447.21% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797QX8) | — | $296.9M | 445.05% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797SW8) | — | $234.1M | 350.98% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797TE7) | — | $233.6M | 350.15% |
| [United States Treasury Bill](https://search.stillhousedata.com/security/912797SV0) | — | $231.2M | 346.57% |

## Net asset history

| Report date | Net assets |
| --- | --- |
| 2026-03-31 | $6.7B |
| 2025-12-31 | $4.6B |
| 2025-09-30 | $3.1B |
| 2025-06-30 | $1.9B |
| 2025-03-31 | $550.6M |

## More

- [Registrant: VANGUARD INSTITUTIONAL INDEX FUNDS](https://search.stillhousedata.com/registrant/862084)
- [This page as markdown (for LLM agents)](https://search.stillhousedata.com/fund/S000090172.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.