# EDGAR Filing Document

**Accession Number:** 0000917286
**File Stem:** 0001752724-25-160133
**Filing Date:** 2025-6
**Character Count:** 10449
**Document Hash:** 5e141bfc1654bae40a629a9fd77d440c
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-25-160133.hdr.sgml**: 20250626

**ACCESSION NUMBER**: 0001752724-25-160133

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250430

**FILED AS OF DATE**: 20250626

**DATE AS OF CHANGE**: 20250626

**PERIOD START**: 20250430

**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:** 251080069

**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:** 2025-04-30

- **b. Date as of which information is reported:** 2025-04-30

**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:** $1577237517.13

**Total Liabilities:** $5409208.49

**Net Assets:** $1571828308.64

**Cash Not Reported:** $0.49

**Currency Risk Metrics (dv01):**

- 

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

- **3-Month:** 39008.66928600 | **1-Year:** 2850.38643800 | **5-Year:** 10464.78175600 | **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 | 0.33%                | 0.36%                | 0.35%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $107158.60               | $-210265.93                                |
| Month 2  | $66175.52                | $-48324.17                                 |
| Month 3  | $-44720.40               | $-31924.76                                 |

### 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% 07/08/2025    | CUSIP: 912797PZ4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  71400000 | PA      | $70835549.44  | 4.51%             | 2025-07-08      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 09/25/2025    | CUSIP: 912797PY7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  79760000 | PA      | $78428267.22  | 4.99%             | 2025-09-25      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 07/29/2025    | CUSIP: 912797QC4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  71400000 | PA      | $70661652.60  | 4.50%             | 2025-07-29      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 07/31/2025    | CUSIP: 912797PG6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  84760000 | PA      | $83862702.67  | 5.34%             | 2025-07-31      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 07/10/2025    | CUSIP: 912797LW5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 140400000 | PA      | $139254710.87 | 8.86%             | 2025-07-10      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 07/15/2025    | CUSIP: 912797QA8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  71400000 | PA      | $70776886.49  | 4.50%             | 2025-07-15      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 07/03/2025    | CUSIP: 912797NX1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 145280000 | PA      | $144213463.20 | 9.17%             | 2025-07-03      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 09/18/2025    | CUSIP: 912797PX9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  80000000 | PA      | $78725611.20  | 5.01%             | 2025-09-18      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 08/14/2025    | CUSIP: 912797PN1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  85680000 | PA      | $84635605.35  | 5.38%             | 2025-08-14      | 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        |   6487187 | NS      | $6488484.12   | 0.41%             |  |  |  | No            |                  1 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 08/07/2025    | CUSIP: 912797MG9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 139660000 | PA      | $138070159.44 | 8.78%             | 2025-08-07      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 07/22/2025    | CUSIP: 912797QB6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  71400000 | PA      | $70718254.95  | 4.50%             | 2025-07-22      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 09/11/2025    | CUSIP: 912797PW1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  79760000 | PA      | $78546615.11  | 5.00%             | 2025-09-11      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 07/24/2025    | CUSIP: 912797PF8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  85680000 | PA      | $84846408.14  | 5.40%             | 2025-07-24      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 08/28/2025    | CUSIP: 912797PQ4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  79400000 | PA      | $78309129.75  | 4.98%             | 2025-08-28      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 08/21/2025    | CUSIP: 912797PP6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  82520000 | PA      | $81447098.07  | 5.18%             | 2025-08-21      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 07/17/2025    | CUSIP: 912797PE1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  85680000 | PA      | $84913698.64  | 5.40%             | 2025-07-17      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |
| UST BILLS                    | UST BILLS 0% 09/04/2025    | CUSIP: 912797MH7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 134420000 | PA      | $132471107.60 | 8.43%             | 2025-09-04      | Fixed         | 0.00%                 | No            |                  2 | On Loan: No      |

### Signature

**Date Signed:** 2025-05-30

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

**Signature:** Laura M. Del Prato

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

**Title:** President and Treasurer