# EDGAR Filing Document

**Accession Number:** 0000862084
**File Stem:** 0000862084-25-000046
**Filing Date:** 2025-8
**Character Count:** 39029
**Document Hash:** 3e0cf90d1a37bed33e7ee8405174fb51
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000862084-25-000046.hdr.sgml**: 20250827

**ACCESSION NUMBER**: 0000862084-25-000046

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250630

**FILED AS OF DATE**: 20250827

**DATE AS OF CHANGE**: 20250827

**PERIOD START**: 20251231

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** VANGUARD INSTITUTIONAL INDEX FUNDS
- **CENTRAL INDEX KEY:** 0000862084

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-06093
- **FILM NUMBER:** 251264992

**BUSINESS ADDRESS:**
- **STREET 1:** PO BOX 2600
- **STREET 2:** V26
- **CITY:** VALLEY FORGE
- **STATE:** PA
- **ZIP:** 19482
- **BUSINESS PHONE:** 6106691000

**MAIL ADDRESS:**
- **STREET 1:** PO BOX 2600
- **STREET 2:** V26
- **CITY:** VALLEY FORGE
- **STATE:** PA
- **ZIP:** 19482

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** VANGUARD INSTITUTIONAL INDEX FUND
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** VANGUARD INSTITUTIONAL EQUITY INDEX FUND INC
- **DATE OF NAME CHANGE:** 19900701

## Series and Classes Contracts Data

### Vanguard Ultra-Short Treasury ETF (Series ID: S000090173)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000257084 | ETF Shares   | VGUS            |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** VANGUARD INSTITUTIONAL INDEX FUNDS

- **b. Investment Company Act file number:** 811-06093

- **c. CIK number of Registrant:** 0000862084

- **d. LEI of Registrant:** 549300HU31ENFT74XN04

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 100 Vanguard Boulevard

  - **City:** Malvern

  - **State:** PA

  - **Foreign country:** US

  - **Zip / Postal Code:** 19355

  - **Telephone number:** 610-669-1000

**Item A.2. Information about the Series.**

- **a. Name of Series:** VANGUARD ULTRA-SHORT TREASURY ETF

- **b. EDGAR series identifier (if any):** S000090173

- **c. LEI of Series:** 529900IZR0IZYR5N4F48

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2025-12-31

- **b. Date as of which information is reported:** 2025-06-30

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $247295402.23

**Total Liabilities:** $6684.21

**Net Assets:** $247288718.02

**Cash Not Reported:** $67208.49

**Currency Risk Metrics (dv01):**

- 

**Credit Spread Risk - Investment Grade (dv01):**

- **3-Month:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** 0.00000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

**Credit Spread Risk - Non-Investment Grade (dv01):**

- **3-Month:** 0.00000000 | **1-Year:** 0.00000000 | **5-Year:** 0.00000000 | **10-Year:** 0.00000000 | **30-Year:** 0.00000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000257084 | 0.35%                | 0.32%                | 0.35%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $180.72                  | $9683.21                                   |
| Month 2  | $965.84                  | $-46840.67                                 |
| Month 3  | $-145.30                 | $8889.50                                   |

### Schedule of Portfolio Investments

| Name                                              | Title                          | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CEY3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1745000 | PA      | $1743704.88   | 0.71%             | 2025-07-15      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 9128285C0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    904000 | PA      | $900963.12    | 0.36%             | 2025-09-30      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797NX1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   8820000 | PA      | $8817944.41   | 3.57%             | 2025-07-03      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797LW5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  10859000 | PA      | $10847611.68  | 4.39%             | 2025-07-10      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 9128285J5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    721000 | PA      | $717817.46    | 0.29%             | 2025-10-31      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QC4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   5110000 | PA      | $5093486.14   | 2.06%             | 2025-07-29      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CFP1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1599000 | PA      | $1598437.86   | 0.65%             | 2025-10-15      | Fixed         | 4.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 9128286X3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    991000 | PA      | $973812.34    | 0.39%             | 2026-05-31      | Fixed         | 2.12%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QB6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   5537000 | PA      | $5523515.08   | 2.23%             | 2025-07-22      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 9128285N6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    814000 | PA      | $809230.46    | 0.33%             | 2025-11-30      | Fixed         | 2.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PP6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   6009000 | PA      | $5972224.92   | 2.42%             | 2025-08-21      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PG6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   6067000 | PA      | $6045942.44   | 2.44%             | 2025-07-31      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CAT8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2091000 | PA      | $2063065.54   | 0.83%             | 2025-10-31      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CJV4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2423000 | PA      | $2422810.69   | 0.98%             | 2026-01-31      | Fixed         | 4.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CAB7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1643000 | PA      | $1637416.36   | 0.66%             | 2025-07-31      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CJE2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1896000 | PA      | $1899851.25   | 0.77%             | 2025-10-31      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 912828Y79<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    828000 | PA      | $826803.28    | 0.33%             | 2025-07-31      | Fixed         | 2.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QU4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2473000 | PA      | $2450546.23   | 0.99%             | 2025-09-16      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 9128286L9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1066000 | PA      | $1051509.06   | 0.43%             | 2026-03-31      | Fixed         | 2.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QP5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2784000 | PA      | $2742920.51   | 1.11%             | 2025-11-06      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CBT7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2236000 | PA      | $2180798.75   | 0.88%             | 2026-03-31      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CKB6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2494000 | PA      | $2500819.52   | 1.01%             | 2026-02-28      | Fixed         | 4.62%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PM3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1982000 | PA      | $1931650.32   | 0.78%             | 2026-02-19      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 9128286F2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1064000 | PA      | $1052196.25   | 0.43%             | 2026-02-28      | Fixed         | 2.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QV2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2473000 | PA      | $2448678.12   | 0.99%             | 2025-09-23      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 9128286A3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1026000 | PA      | $1016421.33   | 0.41%             | 2026-01-31      | Fixed         | 2.62%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PN1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   6068000 | PA      | $6036072.11   | 2.44%             | 2025-08-14      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CGV7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1677000 | PA      | $1672545.47   | 0.68%             | 2026-04-15      | Fixed         | 3.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CHN4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1459000 | PA      | $1459227.97   | 0.59%             | 2025-07-31      | Fixed         | 4.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QQ3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2784000 | PA      | $2740830.62   | 1.11%             | 2025-11-13      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797MG9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   7947000 | PA      | $7912205.38   | 3.20%             | 2025-08-07      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CKH3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2629000 | PA      | $2635983.28   | 1.07%             | 2026-03-31      | Fixed         | 4.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CJS1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2350000 | PA      | $2349908.21   | 0.95%             | 2025-12-31      | Fixed         | 4.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CKK6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2852000 | PA      | $2869825.00   | 1.16%             | 2026-04-30      | Fixed         | 4.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 9128284Z0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    897000 | PA      | $894301.99    | 0.36%             | 2025-08-31      | Fixed         | 2.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797NA1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   4745000 | PA      | $4678175.87   | 1.89%             | 2025-10-30      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QA8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   5537000 | PA      | $5528053.24   | 2.24%             | 2025-07-15      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CJL6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1942000 | PA      | $1946096.40   | 0.79%             | 2025-11-30      | Fixed         | 4.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CBW0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2322000 | PA      | $2258870.63   | 0.91%             | 2026-04-30      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CAJ0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1807000 | PA      | $1794223.95   | 0.73%             | 2025-08-31      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PV3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2002000 | PA      | $1945248.37   | 0.79%             | 2026-03-19      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Vanguard Cmt Funds-Vanguard Market Liquidity Fund | Vanguard Market Liquidity Fund | CUSIP: N/A<br>LEI: 1I6HV0TLSTR3A4XQ6L78       | Long             | STIV             | CORP              | US        |    169069 | NS      | $169051.89    | 0.07%             |  |  |  | No            |                  1 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QD2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2001000 | PA      | $1939074.88   | 0.78%             | 2026-04-16      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CCF6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2286000 | PA      | $2218312.96   | 0.90%             | 2026-05-31      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CBC4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2292000 | PA      | $2248308.75   | 0.91%             | 2025-12-31      | Fixed         | 0.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PW1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2787000 | PA      | $2763282.63   | 1.12%             | 2025-09-11      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CAM3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2145000 | PA      | $2123466.22   | 0.86%             | 2025-09-30      | Fixed         | 0.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 912828K74<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1992000 | PA      | $1985619.37   | 0.80%             | 2025-08-15      | Fixed         | 2.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797NU7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1985000 | PA      | $1944612.34   | 0.79%             | 2025-12-26      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QG5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2822000 | PA      | $2784512.07   | 1.13%             | 2025-10-23      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 912810EW4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    266000 | PA      | $268088.51    | 0.11%             | 2026-02-15      | Fixed         | 6.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CHV6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1757000 | PA      | $1758304.03   | 0.71%             | 2025-08-31      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PZ4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   5508000 | PA      | $5503544.62   | 2.23%             | 2025-07-08      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 912810EV6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    131000 | PA      | $130928.36    | 0.05%             | 2025-08-15      | Fixed         | 6.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CGE5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1678000 | PA      | $1675574.77   | 0.68%             | 2026-01-15      | Fixed         | 3.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PY7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2816000 | PA      | $2787779.80   | 1.13%             | 2025-09-25      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 912828M56<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2385000 | PA      | $2366460.35   | 0.96%             | 2025-11-15      | Fixed         | 2.25%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797NL7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   4754000 | PA      | $4672191.64   | 1.89%             | 2025-11-28      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CJB8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1954000 | PA      | $1956976.80   | 0.79%             | 2025-09-30      | Fixed         | 5.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QJ9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2418000 | PA      | $2405855.65   | 0.97%             | 2025-08-12      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CGR6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1616000 | PA      | $1621491.88   | 0.66%             | 2026-03-15      | Fixed         | 4.62%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797MH7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   4701000 | PA      | $4664799.11   | 1.89%             | 2025-09-04      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CBH3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2410000 | PA      | $2356622.26   | 0.95%             | 2026-01-31      | Fixed         | 0.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CFK2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1670000 | PA      | $1668238.67   | 0.67%             | 2025-09-15      | Fixed         | 3.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CGA3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1673000 | PA      | $1671562.26   | 0.68%             | 2025-12-15      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QN0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1971000 | PA      | $1904180.38   | 0.77%             | 2026-05-14      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CFE6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1502000 | PA      | $1499242.42   | 0.61%             | 2025-08-15      | Fixed         | 3.12%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CHB0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1456000 | PA      | $1450483.13   | 0.59%             | 2026-05-15      | Fixed         | 3.62%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QL4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2473000 | PA      | $2456362.18   | 0.99%             | 2025-08-26      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QK6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2418000 | PA      | $2403782.16   | 0.97%             | 2025-08-19      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 9128285T3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    914000 | PA      | $906787.96    | 0.37%             | 2025-12-31      | Fixed         | 2.62%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QH3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2418000 | PA      | $2407973.69   | 0.97%             | 2025-08-05      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QT7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2473000 | PA      | $2452659.65   | 0.99%             | 2025-09-09      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CKS9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2823000 | PA      | $2842959.49   | 1.15%             | 2026-05-31      | Fixed         | 4.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PD3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1993000 | PA      | $1947547.26   | 0.79%             | 2026-01-22      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QE0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2826000 | PA      | $2793069.25   | 1.13%             | 2025-10-09      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QM2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2473000 | PA      | $2454520.52   | 0.99%             | 2025-09-02      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 9128286S4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |    803000 | PA      | $791801.92    | 0.32%             | 2026-04-30      | Fixed         | 2.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CBQ3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2218000 | PA      | $2164542.74   | 0.88%             | 2026-02-28      | Fixed         | 0.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 912828P46<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1992000 | PA      | $1960485.94   | 0.79%             | 2026-02-15      | Fixed         | 1.62%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PX9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2816000 | PA      | $2789922.32   | 1.13%             | 2025-09-18      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QF7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2826000 | PA      | $2790722.13   | 1.13%             | 2025-10-16      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CAZ4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1954000 | PA      | $1922476.49   | 0.78%             | 2025-11-30      | Fixed         | 0.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797MS3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   4788000 | PA      | $4735617.14   | 1.92%             | 2025-10-02      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QR1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2784000 | PA      | $2738482.42   | 1.11%             | 2025-11-20      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PF8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   6067000 | PA      | $6050817.10   | 2.45%             | 2025-07-24      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 912828R36<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1995000 | PA      | $1953307.61   | 0.79%             | 2026-05-15      | Fixed         | 1.62%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CFW6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1660000 | PA      | $1660648.43   | 0.67%             | 2025-11-15      | Fixed         | 4.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797QW0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2473000 | PA      | $2446588.71   | 0.99%             | 2025-09-30      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PQ4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   5917000 | PA      | $5875626.97   | 2.38%             | 2025-08-28      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Note/Bond                  | US TREASURY N/B                | CUSIP: 91282CGL9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   1522000 | PA      | $1519919.14   | 0.61%             | 2026-02-15      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury Bill                       | TREASURY BILL                  | CUSIP: 912797PE1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   6067000 | PA      | $6055809.87   | 2.45%             | 2025-07-17      | None          | 0.00%                 | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2025-08-27

**Name of Applicant:** VANGUARD INSTITUTIONAL INDEX FUNDS

**Signature:** Ashley Grim

**Name of Signer:** Ashley Grim

**Title:** Treasurer