# EDGAR Filing Document

**Accession Number:** 0000917286
**File Stem:** 0000917286-25-000094
**Filing Date:** 2025-6
**Character Count:** 24077
**Document Hash:** c130692d1ff6215ef89eb01094f1417e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000917286-25-000094.hdr.sgml**: 20250627

**ACCESSION NUMBER**: 0000917286-25-000094

**CONFORMED SUBMISSION TYPE**: 497K

**PUBLIC DOCUMENT COUNT**: 5

**FILED AS OF DATE**: 20250627

**DATE AS OF CHANGE**: 20250627

**EFFECTIVENESS DATE**: 20250627

**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:** 497K
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-52577
- **FILM NUMBER:** 251083550

**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 Money Market Fund (Series ID: S000007052)

| Class ID   | Class Name                 | Ticker Symbol   |
|:---|:---|:---|
| C000019231 | Fidelity Money Market Fund | SPRXX           |
| C000154306 | Premium Class              | FZDXX           |

**Fidelity® Money Market Fund**

**<u>Class</u>**<u>/Ticker</u>

**Premium**/FZDXX

**Summary Prospectus**

**June 28, 2025**

Before you invest, you may want to review the fund's prospectus, which contains more information about the fund and its risks. You can find the fund's prospectus, reports to shareholders, and other information about the fund (including the fund's SAI) online at fundresearch.fidelity.com/prospectus/sec. You can also get this information at no cost by calling 1-800-FIDELITY or by sending an e-mail request to fidfunddocuments@fidelity.com. The fund's prospectus and SAI dated June 28, 2025 are incorporated herein by reference.

![](img109312_1.jpg)

245 Summer Street, Boston, MA 02210

**Fund Summary**

Fund**/Class:**

Fidelity® Money Market Fund**/Premium** 

**Investment Objective**

Fidelity® Money Market Fund seeks as high a level of current income as is consistent with preservation of capital and liquidity.

**Fee Table**

The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. **You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.**

**Shareholder fees**

---

| | |
|:---|:---|
| **(fees paid directly from your investment)** | **None** |

---

**Annual Operating Expenses**

**(expenses that you pay each year as a % of the value of your investment)**

---

| | |
|:---|:---|
| Management fee  | 0.25%  |
| Distribution and/or Service (12b-1) fees |  |
| Other expenses | 0.11%  |
| **Total annual operating expenses** | 0.36%  |
| Fee waiver and/or expense reimbursement | 0.06% A |
| **Total annual operating expenses after fee waiver and/or expense reimbursement** | 0.30%  |

---

AFidelity Management & Research Company LLC (FMR) has contractually agreed to reimburse Premium Class of the fund to the extent that total operating expenses (excluding interest, certain taxes, fees and expenses of the Independent Trustees, extraordinary expenses, and acquired fund fees and expenses (including fees and expenses associated with a wholly owned subsidiary), if any, as well as non-operating expenses such as brokerage commissions and fees and expenses associated with the fund's securities lending program, if applicable), as a percentage of its average net assets, exceed 0.30% (the Expense Cap). If at any time during the current fiscal year expenses for Premium Class of the fund fall below the Expense Cap, FMR reserves the right to recoup through the end of the fiscal year any expenses that were reimbursed during the current fiscal year up to, but not in excess of, the Expense Cap. This arrangement will remain in effect through August 31, 2026. FMR may not terminate this arrangement before the expiration date without the approval of the Board of Trustees and may extend it in its discretion after that date.

This **example** helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

---

| | |
|:---|:---|
| 1 year | $31 |
| 3 years | $107 |
| 5 years | $194 |
| 10 years | $448 |

---

**Principal Investment Strategies**

* Investing in U.S. dollar-denominated money market securities of domestic and foreign issuers and repurchase agreements.

* Investing more than 25% of total assets in the financial services industries.

* Investing in compliance with industry-standard regulatory requirements for money market funds for the quality, maturity, liquidity, and diversification of investments.

**Principal Investment Risks**

* *Interest Rate Changes.*

Interest rate increases can cause the price of a money market security to decrease.

* *Income Risk.*

A low or negative interest rate environment can adversely affect the fund's yield.

* *Foreign Exposure.*

Entities located in foreign countries can be affected by adverse political, regulatory, market, or economic developments in those countries.

* *Financial Services Concentration.*

Changes in government regulation and interest rates and economic downturns can have a significant negative effect on issuers in the financial services sector, including the price of their securities or their ability to meet their payment obligations.

* *Issuer-Specific Changes.*

A decline in the credit quality of an issuer or a provider of credit support (such as guarantees) or a maturity-shortening structure (such as demand and put features) for a security can cause the price of a money market security to decrease.

*You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The fund may impose a fee upon the sale of your shares. An investment in the fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Fidelity Investments and its affiliates, the fund's sponsor, is not required to reimburse the fund for losses, and you should not expect that the sponsor will provide financial support to the fund at any time, including during periods of market stress.*

**Performance**

The following information is intended to help you understand the risks of investing in the fund.

The information illustrates the changes in the performance of the fund's shares from year to year. Past performance is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

**Year-by-Year Returns** 

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
| 0.48%<br>| 1.01%<br>| 1.87%<br>| 2.13%<br>| 0.42%<br>| 0.01%<br>| 1.58%<br>| 5.00%<br>| 5.11%<br>|

---

![](img109312_4.jpg)

---

| | | |
|:---|:---|:---|
| *During the periods shown in the chart:* | *Returns* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*Quarter ended* |
| *Highest Quarter Return* | *1.32%* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*December 31, 2023* |
| *Lowest Quarter Return* | *0.00%* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*March 31, 2021* |
| *Year-to-Date Return* | *1.03%* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*March 31, 2025* |

---

**Average Annual Returns**

---

| | | | |
|:---|:---|:---|:---|
| <br> For the periods ended December 31, 2024 | &nbsp;&nbsp;Past 1<br> year  | &nbsp;&nbsp;Past 5<br> years  | &nbsp;&nbsp;Life of<br>class  |
| **Premium Class** | &nbsp;&nbsp;5.11% | &nbsp;&nbsp;2.40% | &nbsp;&nbsp;1.79%A |

---

A*From April 6, 2015.*

**Investment Adviser**

Fidelity Management & Research Company LLC (FMR) (the Adviser) is the fund's manager. Other investment advisers serve as sub-advisers for the fund.

**Purchase and Sale of Shares**

The fund is a retail money market fund. Shares of the fund are available only to accounts beneficially owned by natural persons.

The fund will involuntarily redeem accounts that are not beneficially owned by natural persons, as determined by the fund, in order to implement the fund's eligibility requirements as a retail money market fund. Shares held by these accounts will be sold at their net asset value per share calculated on the day that the fund closes the account position.

The fund's policies and procedures permit the fund to impose a discretionary liquidity fee on redemptions of up to 2% of the value of the shares redeemed if the Adviser, as the delegate of the fund's Board of Trustees, determines it is in the best interests of the fund.

You may buy or sell shares through a Fidelity® brokerage or mutual fund account, through a retirement account, or through an investment professional.

You may buy or sell shares in various ways:

**Internet**

**www.fidelity.com**

**Phone**

**Fidelity Automated Service Telephone (FAST®) 1-800-544-5555**

**To reach a Fidelity representative 1-800-544-6666**

**Mail**

---

| | |
|:---|:---|
| **Additional purchases:**<br> **Fidelity Investments**<br> **P.O. Box 770001**<br> **Cincinnati, OH 45277-0003** | **Redemptions:**<br> **Fidelity Investments**<br> **P.O. Box 770001**<br> **Cincinnati, OH 45277-0035** |

---

The price to buy one share is its net asset value per share (NAV). Shares will be bought at the NAV next calculated after an order is received in proper form.

The price to sell one share is its NAV. Shares will be sold at the NAV next calculated after an order is received in proper form.

The fund is open for business each day the New York Stock Exchange (NYSE) is open.

Even if the NYSE is closed, the fund will be open for business on those days on which the Federal Reserve Bank of New York (New York Fed) is open, the primary trading markets for the fund's portfolio instruments are open, and the fund's management believes there is an adequate market to meet purchase and redemption requests.

Premium Class shares have a minimum initial investment of $100,000 ($10,000 for Fidelity® Traditional IRA, Roth IRA, Rollover IRA, Simplified Employee-Pension IRA, Keogh, and Investment Only Retirement accounts). The fund may waive or lower purchase minimums in other circumstances.

**Tax Information**

Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account).

**Payments to Broker-Dealers and Other Financial Intermediaries**

The fund, the Adviser, Fidelity Distributors Company LLC (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary's web site for more information.

Current regulations allow Fidelity to send a single copy of shareholder documents for Fidelity® funds, such as prospectuses, annual and semi-annual reports, and proxy materials, to certain mutual fund customers whom we believe are members of the same family who share the same address. For certain types of accounts, we will not send multiple copies of these documents to you and members of your family who share the same address. Instead, we will send only a single copy of these documents. This will continue for as long as you are a shareholder, unless you notify us otherwise. If at any time you choose to receive individual copies of any documents, please call 1-800-544-8544. We will begin sending individual copies to you within 30 days of receiving your call.

Fidelity Distributors Company LLC (FDC) is a member of the Securities Investor Protection Corporation (SIPC). You may obtain information about SIPC, including the SIPC brochure, by visiting www.sipc.org or calling SIPC at 202-371-8300.

Fidelity, the Fidelity Investments Logo and all other Fidelity trademarks or service marks used herein are trademarks or service marks of FMR LLC. Any third-party marks that are used herein are trademarks or service marks of their respective owners.© 2025 FMR LLC. All rights reserved.

1.9863694.115 P14-SUM-0625

**Fidelity® Money Market Fund**

**<u>Class</u>**<u>/Ticker</u>

**Fidelity® Money Market Fund**/SPRXX

In this summary prospectus, the term "shares" (as it relates to the fund) means the class of shares offered through this summary prospectus.

**Summary Prospectus**

**June 28, 2025**

Before you invest, you may want to review the fund's prospectus, which contains more information about the fund and its risks. You can find the fund's prospectus, reports to shareholders, and other information about the fund (including the fund's SAI) online at fundresearch.fidelity.com/prospectus/sec. You can also get this information at no cost by calling 1-800-FIDELITY or by sending an e-mail request to fidfunddocuments@fidelity.com. The fund's prospectus and SAI dated June 28, 2025 are incorporated herein by reference.

![](img109311_1.jpg)

245 Summer Street, Boston, MA 02210

**Fund Summary**

Fund**/Class:**

Fidelity® Money Market Fund**/Fidelity® Money Market Fund** 

**Investment Objective**

Fidelity® Money Market Fund seeks as high a level of current income as is consistent with preservation of capital and liquidity.

**Fee Table**

The following table describes the fees and expenses that may be incurred when you buy, hold, and sell shares of the fund. **You may pay other fees, such as brokerage commissions and other fees to financial intermediaries, which are not reflected in the tables and examples below.**

**Shareholder fees**

---

| | |
|:---|:---|
| **(fees paid directly from your investment)** | **None** |

---

**Annual Operating Expenses**

**(expenses that you pay each year as a % of the value of your investment)**

---

| | |
|:---|:---|
| Management fee  | 0.25%  |
| Distribution and/or Service (12b-1) fees |  |
| Other expenses | 0.17%  |
| **Total annual operating expenses** | 0.42%  |

---

This **example** helps compare the cost of investing in the fund with the cost of investing in other funds.

Let's say, hypothetically, that the annual return for shares of the fund is 5% and that the fees and the annual operating expenses for shares of the fund are exactly as described in the fee table. This example illustrates the effect of fees and expenses, but is not meant to suggest actual or expected fees and expenses or returns, all of which may vary. For every $10,000 you invested, here's how much you would pay in total expenses if you sell all of your shares at the end of each time period indicated:

---

| | |
|:---|:---|
| 1 year | $43 |
| 3 years | $135 |
| 5 years | $235 |
| 10 years | $530 |

---

**Principal Investment Strategies**

* Investing in U.S. dollar-denominated money market securities of domestic and foreign issuers and repurchase agreements.

* Investing more than 25% of total assets in the financial services industries.

* Investing in compliance with industry-standard regulatory requirements for money market funds for the quality, maturity, liquidity, and diversification of investments.

**Principal Investment Risks**

* *Interest Rate Changes.*

Interest rate increases can cause the price of a money market security to decrease.

* *Income Risk.*

A low or negative interest rate environment can adversely affect the fund's yield.

* *Foreign Exposure.*

Entities located in foreign countries can be affected by adverse political, regulatory, market, or economic developments in those countries.

* *Financial Services Concentration.*

Changes in government regulation and interest rates and economic downturns can have a significant negative effect on issuers in the financial services sector, including the price of their securities or their ability to meet their payment obligations.

* *Issuer-Specific Changes.*

A decline in the credit quality of an issuer or a provider of credit support (such as guarantees) or a maturity-shortening structure (such as demand and put features) for a security can cause the price of a money market security to decrease.

*You could lose money by investing in the fund. Although the fund seeks to preserve the value of your investment at $1.00 per share, it cannot guarantee it will do so. The fund may impose a fee upon the sale of your shares. An investment in the fund is not a bank account and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. Fidelity Investments and its affiliates, the fund's sponsor, is not required to reimburse the fund for losses, and you should not expect that the sponsor will provide financial support to the fund at any time, including during periods of market stress.*

**Performance**

The following information is intended to help you understand the risks of investing in the fund.

The information illustrates the changes in the performance of the fund's shares from year to year. Past performance is not an indication of future performance.

Visit www.fidelity.com for more recent performance information.

**Year-by-Year Returns** 

---

| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 |
| 0.01%<br>| 0.36%<br>| 0.89%<br>| 1.75%<br>| 2.01%<br>| 0.36%<br>| 0.01%<br>| 1.49%<br>| 4.87%<br>| 4.98%<br>|

---

![](img109311_4.jpg)

---

| | | |
|:---|:---|:---|
| *During the periods shown in the chart:* | *Returns* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*Quarter ended* |
| *Highest Quarter Return* | *1.29%* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*December 31, 2023* |
| *Lowest Quarter Return* | *0.00%* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*March 31, 2022* |
| *Year-to-Date Return* | *1.00%* | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;*March 31, 2025* |

---

**Average Annual Returns**

---

| | | | |
|:---|:---|:---|:---|
| <br> For the periods ended December 31, 2024 | &nbsp;&nbsp;Past 1<br> year  | &nbsp;&nbsp;Past 5<br> years  | Past 10<br> years  |
| **Fidelity® Money Market Fund** | &nbsp;&nbsp;4.98% | &nbsp;&nbsp;2.32% | &nbsp;&nbsp;1.66% |

---

**Investment Adviser**

Fidelity Management & Research Company LLC (FMR) (the Adviser) is the fund's manager. Other investment advisers serve as sub-advisers for the fund.

**Purchase and Sale of Shares**

The fund is a retail money market fund. Shares of the fund are available only to accounts beneficially owned by natural persons.

The fund will involuntarily redeem accounts that are not beneficially owned by natural persons, as determined by the fund, in order to implement the fund's eligibility requirements as a retail money market fund. Shares held by these accounts will be sold at their net asset value per share calculated on the day that the fund closes the account position.

The fund's policies and procedures permit the fund to impose a discretionary liquidity fee on redemptions of up to 2% of the value of the shares redeemed if the Adviser, as the delegate of the fund's Board of Trustees, determines it is in the best interests of the fund.

You may buy or sell shares through a Fidelity® brokerage or mutual fund account, through a retirement account, or through an investment professional.

You may buy or sell shares in various ways:

**Internet**

**www.fidelity.com**

**Phone**

**Fidelity Automated Service Telephone (FAST®) 1-800-544-5555**

**To reach a Fidelity representative 1-800-544-6666**

**Mail**

---

| | |
|:---|:---|
| **Additional purchases:**<br> **Fidelity Investments**<br> **P.O. Box 770001**<br> **Cincinnati, OH 45277-0003** | **Redemptions:**<br> **Fidelity Investments**<br> **P.O. Box 770001**<br> **Cincinnati, OH 45277-0035** |

---

The price to buy one share is its net asset value per share (NAV). Shares will be bought at the NAV next calculated after an order is received in proper form.

The price to sell one share is its NAV. Shares will be sold at the NAV next calculated after an order is received in proper form.

The fund is open for business each day the New York Stock Exchange (NYSE) is open.

Even if the NYSE is closed, the fund will be open for business on those days on which the Federal Reserve Bank of New York (New York Fed) is open, the primary trading markets for the fund's portfolio instruments are open, and the fund's management believes there is an adequate market to meet purchase and redemption requests.

There is no purchase minimum for shares of the fund offered in this prospectus.

**Tax Information**

Distributions you receive from the fund are subject to federal income tax and generally will be taxed as ordinary income or capital gains, and may also be subject to state or local taxes, unless you are investing through a tax-advantaged retirement account (in which case you may be taxed later, upon withdrawal of your investment from such account).

**Payments to Broker-Dealers and Other Financial Intermediaries**

The fund, the Adviser, Fidelity Distributors Company LLC (FDC), and/or their affiliates may pay intermediaries, which may include banks, broker-dealers, retirement plan sponsors, administrators, or service-providers (who may be affiliated with the Adviser or FDC), for the sale of fund shares and related services. These payments may create a conflict of interest by influencing your intermediary and your investment professional to recommend the fund over another investment. Ask your investment professional or visit your intermediary's web site for more information.

Current regulations allow Fidelity to send a single copy of shareholder documents for Fidelity® funds, such as prospectuses, annual and semi-annual reports, and proxy materials, to certain mutual fund customers whom we believe are members of the same family who share the same address. For certain types of accounts, we will not send multiple copies of these documents to you and members of your family who share the same address. Instead, we will send only a single copy of these documents. This will continue for as long as you are a shareholder, unless you notify us otherwise. If at any time you choose to receive individual copies of any documents, please call 1-800-544-8544. We will begin sending individual copies to you within 30 days of receiving your call.

Fidelity Distributors Company LLC (FDC) is a member of the Securities Investor Protection Corporation (SIPC). You may obtain information about SIPC, including the SIPC brochure, by visiting www.sipc.org or calling SIPC at 202-371-8300.

Fidelity, the Fidelity Investments Logo and all other Fidelity trademarks or service marks used herein are trademarks or service marks of FMR LLC. Any third-party marks that are used herein are trademarks or service marks of their respective owners.© 2025 FMR LLC. All rights reserved.

1.927132.119 SPM-SUM-0625