# EDGAR Filing Document

**Accession Number:** 0000917286
**File Stem:** 0001752724-25-164947
**Filing Date:** 2025-7
**Character Count:** 19493
**Document Hash:** 447599909d740c90a6d8838308d78bc5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-25-164947.hdr.sgml**: 20250708

**ACCESSION NUMBER**: 0001752724-25-164947

**CONFORMED SUBMISSION TYPE**: N-MFP3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20250630

**FILED AS OF DATE**: 20250708

**DATE AS OF CHANGE**: 20250708

**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:** N-MFP3
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-07139
- **FILM NUMBER:** 251109754

**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 Treasury Digital Fund (Series ID: S000089156)

| Class ID   | Class Name      | Ticker Symbol   |
|:---|:---|:---|
| C000255665 | Liquidity Class | FYHXX           |

# Form N-MFP3: Monthly Schedule of Portfolio Holdings

## N-MFP: Filer Information
**Submission Type:** N-MFP3
**CIK:** 0000917286

### General Information

**Report for (YYYY-MM-DD):** 2025-06-30

**Registrant Full Name:** Fidelity Hereford Street Trust

**CIK Number of Registrant:** 0000917286

**LEI of Registrant:** 549300KQI5JTFSYJTM18

**Name of Series:** Fidelity Treasury Digital Fund

**LEI of Series:** 254900YKV8XBVW2K5V95

**EDGAR Series Identifier:** S000089156

**Total number of share classes in the series:** 1

**Is this the fund's final filing on Form N-MFP?:** No

**Has the fund acquired or merged with another fund?:** No

## Part A: Series-Level Information about the Fund

### Service Providers
| Role                          | Details                                                                      | File/CIK Number   |
|:---|:---|:---|
| Investment Adviser            | Fidelity Management & Research Company LLC                                   | 801-07884         |
| Independent Public Accountant | PricewaterhouseCoopers LLP<br>City: Boston<br>State: MA                      |  |
| Administrator                 | Fidelity Service Company                                                     |  |
| Transfer Agent                | Fidelity Investments Institutional Operations Company LLC<br>CIK: 0000862124 | 084-01839         |

### Fund Characteristics & Assets

- **Securities Act File Number:** 033-52577

- **Is this a Feeder Fund?:** No

- **Is this a Master Fund?:** No

- **Is this series for insurance company separate accounts?:** No

- **Money Market Fund Category:** Government

- **Is this a Retail Money Market Fund?:** No

- **Is this a Government Money Market Fund?:** Yes

- **WAM:** 37 days

- **WAL:** 37 days

- **Total Value of Portfolio Securities:** $213035658.66

- **Amortized Cost of Portfolio Securities:** $213035479.06

- **Cash:** $16.73

- **Total Other Assets:** $661329.02

- **Total Liabilities:** $690096.75

- **Net Assets of Series:** $213006728.06

- **Number of Shares Outstanding (Series):** 213005807.7000

- **Does the fund seek to maintain a stable price per share?:** Yes

- **Stable Price Per Share:** $1.00

- **Is cash management vehicle an affiliated fund?:** No

- **Does the fund apply liquidity fees?:** No

### Daily & Weekly Liquid Assets
| Date       | Daily Liquid Assets ($)   | Weekly Liquid Assets ($)   | Daily Liquid Assets (%)   | Weekly Liquid Assets (%)   |
|:---|:---|:---|:---|:---|
| 2025-06-02 | $180183182.24             | $180183182.24              | 100.0000%                 | 100.0000%                  |
| 2025-06-03 | $150371255.24             | $150371255.24              | 99.0000%                  | 99.0000%                   |
| 2025-06-04 | $150388906.27             | $150388906.27              | 99.0000%                  | 99.0000%                   |
| 2025-06-05 | $152393417.51             | $152393417.51              | 99.0000%                  | 99.0000%                   |
| 2025-06-06 | $169996521.45             | $169996521.45              | 99.0000%                  | 99.0000%                   |
| 2025-06-09 | $170016249.24             | $170016249.24              | 99.0000%                  | 99.0000%                   |
| 2025-06-10 | $168049123.75             | $168049123.75              | 99.0000%                  | 99.0000%                   |
| 2025-06-11 | $200519124.48             | $200519124.48              | 100.0000%                 | 100.0000%                  |
| 2025-06-12 | $200542616.62             | $200542616.62              | 100.0000%                 | 100.0000%                  |
| 2025-06-13 | $200613092.99             | $200613092.99              | 100.0000%                 | 100.0000%                  |
| 2025-06-16 | $251743350.12             | $251743350.12              | 100.0000%                 | 100.0000%                  |
| 2025-06-17 | $251768221.78             | $251768221.78              | 100.0000%                 | 100.0000%                  |
| 2025-06-18 | $251817965.11             | $251817965.11              | 100.0000%                 | 100.0000%                  |
| 2025-06-20 | $212651008.43             | $212651008.43              | 100.0000%                 | 100.0000%                  |
| 2025-06-23 | $212676023.85             | $212676023.85              | 100.0000%                 | 100.0000%                  |
| 2025-06-24 | $212885951.75             | $212885951.75              | 100.0000%                 | 100.0000%                  |
| 2025-06-25 | $212910879.09             | $212910879.09              | 100.0000%                 | 100.0000%                  |
| 2025-06-26 | $212935786.33             | $212935786.33              | 100.0000%                 | 100.0000%                  |
| 2025-06-27 | $213010568.40             | $213010568.40              | 99.0000%                  | 99.0000%                   |
| 2025-06-30 | $213035495.79             | $213035495.79              | 99.0000%                  | 99.0000%                   |

### 7-Day Gross Yield
| Date       | 7-Day Gross Yield   |
|:---|:---|
| 2025-06-02 | 4.2900%             |
| 2025-06-03 | 4.2900%             |
| 2025-06-04 | 4.2900%             |
| 2025-06-05 | 4.2900%             |
| 2025-06-06 | 4.2900%             |
| 2025-06-09 | 4.2900%             |
| 2025-06-10 | 4.2900%             |
| 2025-06-11 | 4.2900%             |
| 2025-06-12 | 4.2900%             |
| 2025-06-13 | 4.2900%             |
| 2025-06-16 | 4.2800%             |
| 2025-06-17 | 4.2800%             |
| 2025-06-18 | 4.2800%             |
| 2025-06-20 | 4.2900%             |
| 2025-06-23 | 4.3000%             |
| 2025-06-24 | 4.3000%             |
| 2025-06-25 | 4.3000%             |
| 2025-06-26 | 4.3000%             |
| 2025-06-27 | 4.2900%             |
| 2025-06-30 | 4.2900%             |

### Daily Net Asset Value per Share (Series)
| Date       | Net Asset Value per Share   |
|:---|:---|
| 2025-06-02 | 1.0000                      |
|  |  |
| 2025-06-03 | 1.0000                      |
|  |  |
| 2025-06-04 | 1.0000                      |
|  |  |
| 2025-06-05 | 1.0000                      |
|  |  |
| 2025-06-06 | 1.0000                      |
|  |  |
| 2025-06-09 | 1.0000                      |
|  |  |
| 2025-06-10 | 1.0000                      |
|  |  |
| 2025-06-11 | 1.0000                      |
|  |  |
| 2025-06-12 | 1.0000                      |
|  |  |
| 2025-06-13 | 1.0000                      |
|  |  |
| 2025-06-16 | 1.0000                      |
|  |  |
| 2025-06-17 | 1.0000                      |
|  |  |
| 2025-06-18 | 1.0000                      |
|  |  |
| 2025-06-20 | 1.0000                      |
|  |  |
| 2025-06-23 | 1.0001                      |
|  |  |
| 2025-06-24 | 1.0001                      |
|  |  |
| 2025-06-25 | 1.0001                      |
|  |  |
| 2025-06-26 | 1.0001                      |
|  |  |
| 2025-06-27 | 1.0000                      |
|  |  |
| 2025-06-30 | 1.0000                      |
|  |  |

## Part B: Class-Level Information about the Fund

### Class: Fidelity Treasury Digital Fund

- **Minimum Initial Investment:** $1000000.00

- **Net Assets of Class:** $213006728.06

- **Number of Shares Outstanding:** 213005807.7000

- **Expense Reimbursement/Waiver:** 11299.98

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-06-02 | 1.0000          |
|  |  |
| 2025-06-03 | 1.0000          |
|  |  |
| 2025-06-04 | 1.0000          |
|  |  |
| 2025-06-05 | 1.0000          |
|  |  |
| 2025-06-06 | 1.0000          |
|  |  |
| 2025-06-09 | 1.0000          |
|  |  |
| 2025-06-10 | 1.0000          |
|  |  |
| 2025-06-11 | 1.0000          |
|  |  |
| 2025-06-12 | 1.0000          |
|  |  |
| 2025-06-13 | 1.0000          |
|  |  |
| 2025-06-16 | 1.0000          |
|  |  |
| 2025-06-17 | 1.0000          |
|  |  |
| 2025-06-18 | 1.0000          |
|  |  |
| 2025-06-20 | 1.0000          |
|  |  |
| 2025-06-23 | 1.0001          |
|  |  |
| 2025-06-24 | 1.0001          |
|  |  |
| 2025-06-25 | 1.0001          |
|  |  |
| 2025-06-26 | 1.0001          |
|  |  |
| 2025-06-27 | 1.0000          |
|  |  |
| 2025-06-30 | 1.0000          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-06-02 | $455037.92                | $0.00                   |
| 2025-06-03 | $0.00                     | $0.00                   |
| 2025-06-04 | $0.00                     | $0.00                   |
| 2025-06-05 | $0.00                     | $0.00                   |
| 2025-06-06 | $17543920.48              | $0.00                   |
| 2025-06-09 | $0.00                     | $0.00                   |
| 2025-06-10 | $0.00                     | $0.00                   |
| 2025-06-11 | $32439319.88              | $0.00                   |
| 2025-06-12 | $0.00                     | $0.00                   |
| 2025-06-13 | $0.00                     | $0.00                   |
| 2025-06-16 | $11529419.31              | $0.00                   |
| 2025-06-17 | $0.00                     | $0.00                   |
| 2025-06-18 | $0.00                     | $0.00                   |
| 2025-06-20 | $333997.01                | $0.00                   |
| 2025-06-23 | $0.00                     | $0.00                   |
| 2025-06-24 | $183998.20                | $0.00                   |
| 2025-06-25 | $0.00                     | $0.00                   |
| 2025-06-26 | $0.00                     | $0.00                   |
| 2025-06-27 | $0.00                     | $0.00                   |
| 2025-06-30 | $0.00                     | $0.00                   |

**Total Gross Subscriptions (Month):** $62485692.80

**Total Gross Redemptions (Month):** $0.00

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-06-02 | 4.1100%           |
| 2025-06-03 | 4.1100%           |
| 2025-06-04 | 4.1100%           |
| 2025-06-05 | 4.1100%           |
| 2025-06-06 | 4.1100%           |
| 2025-06-09 | 4.1100%           |
| 2025-06-10 | 4.1100%           |
| 2025-06-11 | 4.1100%           |
| 2025-06-12 | 4.1100%           |
| 2025-06-13 | 4.1100%           |
| 2025-06-16 | 4.1000%           |
| 2025-06-17 | 4.1000%           |
| 2025-06-18 | 4.1000%           |
| 2025-06-20 | 4.1100%           |
| 2025-06-23 | 4.1200%           |
| 2025-06-24 | 4.1200%           |
| 2025-06-25 | 4.1200%           |
| 2025-06-26 | 4.1200%           |
| 2025-06-27 | 4.1200%           |
| 2025-06-30 | 4.1100%           |

**Beneficial/Record Owner Categories**
| Category   | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Other      | PARTNERSHIP      | 97.3000%         | 0.0000%              |

## Part C: Schedule of Portfolio Securities

### Security 1: US Treasury Bill

- **C.1 - Title:** UST BILLS 0% 07/01/2025
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797PU5, C.4 - ISIN: US912797PU59, C.3 - LEI: 254900HROIFWPRGM1V77, C.5 - Other ID: LAU992000
- **C.18 - Value (incl. sponsor support):** $266500.00
- **C.18.a - Value (excl. sponsor support):** $266500.00
- **C.19 - Percentage of Net Assets:** 0.1300%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2025-07-01
- **C.12 - Maturity Date (WAL):** 2025-07-01
- **C.13 - Final Legal Maturity Date:** 2025-07-01
- **C.10 - Ratings:** N/A: N/A
- **Characteristics:** C.9 Eligible Security? Yes, C.14 Has Demand Feature? No, C.15 Has Guarantee? No, C.16 Has Enhancement? No, C.22 Is an Illiquid Security? No, C.20 Is a Daily Liquid Asset? Yes, C.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 2: US Treasury Bill

- **C.1 - Title:** UST BILLS 0% 07/03/2025
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797NX1, C.4 - ISIN: US912797NX17, C.3 - LEI: 254900HROIFWPRGM1V77, C.5 - Other ID: KWT485000
- **C.18 - Value (incl. sponsor support):** $36148581.57
- **C.18.a - Value (excl. sponsor support):** $36148581.57
- **C.19 - Percentage of Net Assets:** 16.9700%
- **C.17 - Yield as of Reporting Date:** 2.8100%
- **C.11 - Maturity Date (WAM):** 2025-07-03
- **C.12 - Maturity Date (WAL):** 2025-07-03
- **C.13 - Final Legal Maturity Date:** 2025-07-03
- **C.10 - Ratings:** N/A: N/A
- **Characteristics:** C.9 Eligible Security? Yes, C.14 Has Demand Feature? No, C.15 Has Guarantee? No, C.16 Has Enhancement? No, C.22 Is an Illiquid Security? No, C.20 Is a Daily Liquid Asset? Yes, C.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 3: US Treasury Bill

- **C.1 - Title:** UST BILLS 0% 07/22/2025
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797QB6, C.4 - ISIN: US912797QB69, C.3 - LEI: 254900HROIFWPRGM1V77, C.5 - Other ID: LBY728000
- **C.18 - Value (incl. sponsor support):** $42567102.79
- **C.18.a - Value (excl. sponsor support):** $42567102.79
- **C.19 - Percentage of Net Assets:** 19.9800%
- **C.17 - Yield as of Reporting Date:** 4.0000%
- **C.11 - Maturity Date (WAM):** 2025-07-22
- **C.12 - Maturity Date (WAL):** 2025-07-22
- **C.13 - Final Legal Maturity Date:** 2025-07-22
- **C.10 - Ratings:** N/A: N/A
- **Characteristics:** C.9 Eligible Security? Yes, C.14 Has Demand Feature? No, C.15 Has Guarantee? No, C.16 Has Enhancement? No, C.22 Is an Illiquid Security? No, C.20 Is a Daily Liquid Asset? Yes, C.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 4: US Treasury Bill

- **C.1 - Title:** UST BILLS 0% 07/31/2025
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797PG6, C.4 - ISIN: US912797PG65, C.3 - LEI: 254900HROIFWPRGM1V77, C.5 - Other ID: KYF869000
- **C.18 - Value (incl. sponsor support):** $36871517.50
- **C.18.a - Value (excl. sponsor support):** $36871517.50
- **C.19 - Percentage of Net Assets:** 17.3100%
- **C.17 - Yield as of Reporting Date:** 4.0700%
- **C.11 - Maturity Date (WAM):** 2025-07-31
- **C.12 - Maturity Date (WAL):** 2025-07-31
- **C.13 - Final Legal Maturity Date:** 2025-07-31
- **C.10 - Ratings:** N/A: N/A
- **Characteristics:** C.9 Eligible Security? Yes, C.14 Has Demand Feature? No, C.15 Has Guarantee? No, C.16 Has Enhancement? No, C.22 Is an Illiquid Security? No, C.20 Is a Daily Liquid Asset? Yes, C.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 5: US Treasury Bill

- **C.1 - Title:** UST BILLS 0% 07/29/2025
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797QC4, C.4 - ISIN: US912797QC43, C.3 - LEI: 254900HROIFWPRGM1V77, C.5 - Other ID: LCX676000
- **C.18 - Value (incl. sponsor support):** $29903166.60
- **C.18.a - Value (excl. sponsor support):** $29903166.60
- **C.19 - Percentage of Net Assets:** 14.0400%
- **C.17 - Yield as of Reporting Date:** 4.0400%
- **C.11 - Maturity Date (WAM):** 2025-07-29
- **C.12 - Maturity Date (WAL):** 2025-07-29
- **C.13 - Final Legal Maturity Date:** 2025-07-29
- **C.10 - Ratings:** N/A: N/A
- **Characteristics:** C.9 Eligible Security? Yes, C.14 Has Demand Feature? No, C.15 Has Guarantee? No, C.16 Has Enhancement? No, C.22 Is an Illiquid Security? No, C.20 Is a Daily Liquid Asset? Yes, C.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 6: US Treasury Bill

- **C.1 - Title:** UST BILLS 0% 07/17/2025
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797PE1, C.4 - ISIN: US912797PE18, C.3 - LEI: 254900HROIFWPRGM1V77, C.5 - Other ID: KXM815000
- **C.18 - Value (incl. sponsor support):** $8032293.34
- **C.18.a - Value (excl. sponsor support):** $8032293.34
- **C.19 - Percentage of Net Assets:** 3.7700%
- **C.17 - Yield as of Reporting Date:** 3.9300%
- **C.11 - Maturity Date (WAM):** 2025-07-17
- **C.12 - Maturity Date (WAL):** 2025-07-17
- **C.13 - Final Legal Maturity Date:** 2025-07-17
- **C.10 - Ratings:** N/A: N/A
- **Characteristics:** C.9 Eligible Security? Yes, C.14 Has Demand Feature? No, C.15 Has Guarantee? No, C.16 Has Enhancement? No, C.22 Is an Illiquid Security? No, C.20 Is a Daily Liquid Asset? Yes, C.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 7: US Treasury Bill

- **C.1 - Title:** UST BILLS 0% 09/18/2025
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797PX9, C.4 - ISIN: US912797PX98, C.3 - LEI: 254900HROIFWPRGM1V77, C.5 - Other ID: LBR658000
- **C.18 - Value (incl. sponsor support):** $35035635.51
- **C.18.a - Value (excl. sponsor support):** $35035635.51
- **C.19 - Percentage of Net Assets:** 16.4500%
- **C.17 - Yield as of Reporting Date:** 4.3000%
- **C.11 - Maturity Date (WAM):** 2025-09-18
- **C.12 - Maturity Date (WAL):** 2025-09-18
- **C.13 - Final Legal Maturity Date:** 2025-09-18
- **C.10 - Ratings:** N/A: N/A
- **Characteristics:** C.9 Eligible Security? Yes, C.14 Has Demand Feature? No, C.15 Has Guarantee? No, C.16 Has Enhancement? No, C.22 Is an Illiquid Security? No, C.20 Is a Daily Liquid Asset? Yes, C.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 8: US Treasury Bill

- **C.1 - Title:** UST BILLS 0% 09/16/2025
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797QU4, C.4 - ISIN: US912797QU41, C.3 - LEI: 254900HROIFWPRGM1V77, C.5 - Other ID: LFP227000
- **C.18 - Value (incl. sponsor support):** $24210861.35
- **C.18.a - Value (excl. sponsor support):** $24210861.35
- **C.19 - Percentage of Net Assets:** 11.3700%
- **C.17 - Yield as of Reporting Date:** 4.3200%
- **C.11 - Maturity Date (WAM):** 2025-09-16
- **C.12 - Maturity Date (WAL):** 2025-09-16
- **C.13 - Final Legal Maturity Date:** 2025-09-16
- **C.10 - Ratings:** N/A: N/A
- **Characteristics:** C.9 Eligible Security? Yes, C.14 Has Demand Feature? No, C.15 Has Guarantee? No, C.16 Has Enhancement? No, C.22 Is an Illiquid Security? No, C.20 Is a Daily Liquid Asset? Yes, C.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

## N-MFP: Signatures

**Registrant:** Fidelity Treasury Digital Fund

**Date:** 2025-07-02

**By:** Laura M. Del Prato

**Name of Signing Officer:** Laura M. Del Prato

**Title of Signing Officer:** President and Treasurer