# EDGAR Filing Document

**Accession Number:** 0000917286
**File Stem:** 0000035402-25-003019
**Filing Date:** 2025-12
**Character Count:** 10453
**Document Hash:** 0c28a60d9d8376cafe7da3039f1a6730
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000035402-25-003019.hdr.sgml**: 20251223

**ACCESSION NUMBER**: 0000035402-25-003019

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251031

**FILED AS OF DATE**: 20251223

**DATE AS OF CHANGE**: 20251223

**PERIOD START**: 20260430

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIDELITY HEREFORD STREET TRUST
- **CENTRAL INDEX KEY:** 0000917286

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-07139
- **FILM NUMBER:** 251600001

**BUSINESS ADDRESS:**
- **STREET 1:** 245 SUMMER STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210
- **BUSINESS PHONE:** 617-563-7000

**MAIL ADDRESS:**
- **STREET 1:** 245 SUMMER STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02210

## Series and Classes Contracts Data

### Fidelity Series Treasury Bill Index Fund (Series ID: S000062807)

| Class ID   | Class Name                               | Ticker Symbol   |
|:---|:---|:---|
| C000203454 | Fidelity Series Treasury Bill Index Fund | FHQFX           |

## Form NPORT-P: Monthly Portfolio Investments Report

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

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

- **a. Name of Registrant:** Fidelity Hereford Street Trust

- **b. Investment Company Act file number:** 811-07139

- **c. CIK number of Registrant:** 0000917286

- **d. LEI of Registrant:** 549300KQI5JTFSYJTM18

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

  - **Street Address 1:** 245 Summer Street

  - **City:** Boston

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02210

  - **Telephone number:** 1-800-FIDELITY

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

- **a. Name of Series:** Fidelity Series Treasury Bill Index Fund

- **b. EDGAR series identifier (if any):** S000062807

- **c. LEI of Series:** 5493000RGG57MG2DSB62

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

- **a. Date of fiscal year-end:** 2026-04-30

- **b. Date as of which information is reported:** 2025-10-31

**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:** $1706504377.85

**Total Liabilities:** $6286207.88

**Net Assets:** $1700218169.97

**Cash Not Reported:** $57497.37

**Currency Risk Metrics (dv01):**

- 

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

- **3-Month:** 42271.66682000 | **1-Year:** 3151.31844600 | **5-Year:** 11355.75601600 | **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 C000203454 | 0.46%                | 0.34%                | 0.34%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-236586.17              | $1167453.10                                |
| Month 2  | $226453.73               | $258921.78                                 |
| Month 3  | $409221.68               | $-502156.64                                |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| UST BILLS                    | UST BILLS 0% 02/19/2026    | CUSIP: 912797PM3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 161000000 | PA      | $159192952.10 | 9.36%             | 2026-02-19      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 01/13/2026    | CUSIP: 912797SF5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  86280000 | PA      | $85648013.67  | 5.04%             | 2026-01-13      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 03/26/2026    | CUSIP: 912797SC2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  96480000 | PA      | $95053963.85  | 5.59%             | 2026-03-26      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 01/20/2026    | CUSIP: 912797SG3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  86280000 | PA      | $85582993.92  | 5.03%             | 2026-01-20      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 03/12/2026    | CUSIP: 912797SB4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  97140000 | PA      | $95838335.66  | 5.64%             | 2026-03-12      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 01/22/2026    | CUSIP: 912797PD3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 161000000 | PA      | $159655650.00 | 9.39%             | 2026-01-22      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 01/29/2026    | CUSIP: 912797RK5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  96860000 | PA      | $95986981.45  | 5.65%             | 2026-01-29      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 01/02/2026    | CUSIP: 912797RA7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   2760000 | PA      | $2742344.06   | 0.16%             | 2026-01-02      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 03/05/2026    | CUSIP: 912797RV1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  97140000 | PA      | $95909352.77  | 5.64%             | 2026-03-05      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 02/05/2026    | CUSIP: 912797RL3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  95820000 | PA      | $94881387.52  | 5.58%             | 2026-02-05      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 01/06/2026    | CUSIP: 912797SE8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  86280000 | PA      | $85696191.56  | 5.04%             | 2026-01-06      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 01/27/2026    | CUSIP: 912797SH1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  86280000 | PA      | $85515858.59  | 5.03%             | 2026-01-27      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 01/15/2026    | CUSIP: 912797RJ8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  94860000 | PA      | $94135321.77  | 5.54%             | 2026-01-15      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| Fidelity Revere Street Trust | Fidelity Cash Central Fund | CUSIP: 31635A105<br>LEI: 549300BDV45LJNXBZC55 | Long             | STIV             | RF                | US        |  25346103 | NS      | $25351171.92  | 1.49%             |  |  |  | No            |                  1 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 03/19/2026    | CUSIP: 912797PV3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 160280000 | PA      | $158028035.55 | 9.29%             | 2026-03-19      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 02/12/2026    | CUSIP: 912797RT6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  95800000 | PA      | $94796431.77  | 5.58%             | 2026-02-12      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 02/26/2026    | CUSIP: 912797RU3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  97140000 | PA      | $95979756.93  | 5.65%             | 2026-02-26      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 01/08/2026    | CUSIP: 912797RH2<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  97120000 | PA      | $96446513.59  | 5.67%             | 2026-01-08      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2025-11-30

**Name of Applicant:** Laura M. Del Prato

**Signature:** Laura M. Del Prato

**Name of Signer:** Laura M. Del Prato

**Title:** President and Treasurer