# EDGAR Filing Document

**Accession Number:** 0000356173
**File Stem:** 0000035402-26-003589
**Filing Date:** 2026-6
**Character Count:** 7188
**Document Hash:** e328ca6b6aa3bce4ac35fe09d20978c8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000035402-26-003589.hdr.sgml**: 20260623

**ACCESSION NUMBER**: 0000035402-26-003589

**CONFORMED SUBMISSION TYPE**: 24F-2NT

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260623

**DATE AS OF CHANGE**: 20260623

**EFFECTIVENESS DATE**: 20260623

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Fidelity Colchester Street Trust
- **CENTRAL INDEX KEY:** 0000356173

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** 24F-2NT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 002-74808
- **FILM NUMBER:** 261109550

**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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** COLCHESTER STREET TRUST
- **DATE OF NAME CHANGE:** 19980324

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY INSTITUTIONAL CASH PORTFOLIOS
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CASH INVESTMENT FUND
- **DATE OF NAME CHANGE:** 19850414

## Series and Classes Contracts Data

### Treasury Only Portfolio (Series ID: S000004818)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Class I             | FSIXX         | C000013037 |
| Class II            | FOXXX         | C000013074 |
| Class III           | FOIXX         | C000013075 |
| Select Class        | FTYXX         | C000013076 |
| Class IV            | FOPXX         | C000056567 |
| Institutional Class | FRSXX         | C000141702 |

---

### Treasury Portfolio (Series ID: S000004819)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Class I             | FISXX         | C000013038 |
| Class II            | FCEXX         | C000013077 |
| Class III           | FCSXX         | C000013078 |
| Select Class        | FTUXX         | C000013079 |
| Class IV            | FTVXX         | C000056568 |
| Institutional Class | FRBXX         | C000141703 |

---

### Government Portfolio (Series ID: S000004820)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Class I             | FIGXX         | C000013039 |
| Class II            | FCVXX         | C000013080 |
| Class III           | FCGXX         | C000013081 |
| Select Class        | FGEXX         | C000013082 |
| Institutional Class | FRGXX         | C000141704 |

---

### Money Market Portfolio (Series ID: S000004822)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Class I             | FMPXX         | C000013041 |
| Class II            | FCIXX         | C000013086 |
| Class III           | FCOXX         | C000013087 |
| Select Class        | FMYXX         | C000013088 |
| Institutional Class | FNSXX         | C000056571 |

---

### Tax-Exempt Portfolio (Series ID: S000004823)

---

|  |  |  |
|:---|:---|:---|
| Class Name   | Ticker Symbol | Class ID   |
| Class I      | FTCXX         | C000013042 |
| Class II     | FEXXX         | C000013089 |
| Class III    | FETXX         | C000013090 |
| Select Class | FSXXX         | C000013091 |

---

## Series and Classes Contracts Data

### Treasury Only Portfolio (Series ID: S000004818)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000013037 | Class I             | FSIXX           |
| C000013074 | Class II            | FOXXX           |
| C000013075 | Class III           | FOIXX           |
| C000013076 | Select Class        | FTYXX           |
| C000056567 | Class IV            | FOPXX           |
| C000141702 | Institutional Class | FRSXX           |

### Treasury Portfolio (Series ID: S000004819)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000013038 | Class I             | FISXX           |
| C000013077 | Class II            | FCEXX           |
| C000013078 | Class III           | FCSXX           |
| C000013079 | Select Class        | FTUXX           |
| C000056568 | Class IV            | FTVXX           |
| C000141703 | Institutional Class | FRBXX           |

### Government Portfolio (Series ID: S000004820)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000013039 | Class I             | FIGXX           |
| C000013080 | Class II            | FCVXX           |
| C000013081 | Class III           | FCGXX           |
| C000013082 | Select Class        | FGEXX           |
| C000141704 | Institutional Class | FRGXX           |

### Money Market Portfolio (Series ID: S000004822)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000013041 | Class I             | FMPXX           |
| C000013086 | Class II            | FCIXX           |
| C000013087 | Class III           | FCOXX           |
| C000013088 | Select Class        | FMYXX           |
| C000056571 | Institutional Class | FNSXX           |

### Tax-Exempt Portfolio (Series ID: S000004823)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000013042 | Class I      | FTCXX           |
| C000013089 | Class II     | FEXXX           |
| C000013090 | Class III    | FETXX           |
| C000013091 | Select Class | FSXXX           |

## FORM 24F-2NT: Annual Notice of Securities Sold Pursuant to Rule 24f-2

### 24F-2NT: Filer Information

**Filer CIK:** 0000356173

**Is this a LIVE or TEST Filing?:** LIVE

**Filer Investment Company Type:** N-1A

### 24F-2NT: Annual Filing Information

**1. Name and address of issuer:**

- **Name of Issuer:** Fidelity Colchester Street Trust

- **Address:** 245 Summer Street, Boston, MA 02210

**2. The Name and EDGAR Identifier of each series or class of securities for which this Form is filed:**

- [ ] Check box if the Form is being filed for all series and classes of the issuer.

**3. Investment Company Act File Number:** 811-03320

   **Securities Act File Number:** 002-74808

**4(a). Last day of fiscal year for which this Form is filed:** 03/31/2026

**4(b). Check box if this Form is being filed late:** [ ]

**4(c). Check box if this is the last time the issuer will be filing this Form:** [ ]

**5. Calculation of registration fee:**

- **(i) Aggregate sale price of securities sold during the fiscal year:** $2095302592675.00

- **(ii) Aggregate price of securities redeemed or repurchased during the fiscal year:** $2016027561641.00

- **(iii) Aggregate price of securities redeemed or repurchased during any prior fiscal year:** $0.00

- **(iv) Total available redemption credits [add Items 5(ii) and 5(iii)]:** $2016027561641.00

- **(v) Net sales:** $79275031034.00

- **(vi) Redemption credits available for use in future years:** $0.00

- **(vii) Multiplier for determining registration fee:** 0.0001381

- **(viii) Registration fee due:** $10947881.79

**Explanatory Notes (if any):**
0

**Signatures**

**Name and Title:** President and Treasurer

**Date:** 03/31/2026

**Signature:** Laura M. Del Prato