# EDGAR Filing Document

**Accession Number:** 0000356173
**File Stem:** 0000356173-23-000019
**Filing Date:** 2023-2
**Character Count:** 36019
**Document Hash:** 3800661a032ef133efc26206011ea4ca
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0000356173-23-000019.hdr.sgml**: 20230207

**ACCESSION NUMBER**: 0000356173-23-000019

**CONFORMED SUBMISSION TYPE**: N-MFP2

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230131

**FILED AS OF DATE**: 20230207

**DATE AS OF CHANGE**: 20230207

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Fidelity Colchester Street Trust
- **CENTRAL INDEX KEY:** 0000356173
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** N-MFP2
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-03320
- **FILM NUMBER:** 23592924

**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 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           |

# Form N-MFP: Monthly Schedule of Portfolio Holdings

## N-MFP: Filer Information

**Submission Type:** N-MFP2

**Live/Test Flag:** —

**Is Electronic Copy of Paper Format:** —

**CIK:** —

### General Information

**Report for (YYYY-MM-DD):** 2023-01-31

**EDGAR Series Identifier:** S000004818

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

**Is this the fund's final filing on Form N-MFP?:** —

**Is Fund Liquidating?:** —

**Is Fund Merging/Being Acquired?:** —

**Has the fund acquired or merged with another fund during the reporting period?:** —

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

### Service Providers
| Item   | Role                          | Details                                                            | File/CIK Number   |
|:---|:---|:---|:---|
| A.5    | Administrator                 | None                                                               |  |
| A.4    | Independent Public Accountant | DELOITTE & TOUCHE LLP<br>City: BOSTON<br>State: MA                 |  |
| A.6    | Transfer Agent                | FIDELITY INVESTMENTS INSTIT. OPERATIONS CO. LLC<br>CIK: 0000862124 | 084-01839         |

### Fund Characteristics & Assets

- **A.1 - Securities Act File Number:** 002-74808

- **A.7 - Is this a Feeder Fund?:** No

- **A.8 - Is this a Master Fund?:** No

- **A.9 - Is this series primarily used to fund insurance company separate accounts?:** No

- **A.10 - Money Market Fund Category:** Exempt Government

- **A.11 - WAM:** 38 days

- **A.12 - WAL:** 56 days

- **Total Value of Portfolio Securities:** $36181063246.48

- **Amortized Cost of Portfolio Securities:** $36182895223.05

- **Cash:** $0.00

- **Total Other Assets:** $651911421.49

- **Total Liabilities:** $1308567511.44

- **Net Assets of Series:** $35526239133.10

- **Number of Shares Outstanding (Series):** 35525441563.57

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

- **7-Day Gross Yield:** 4.3800%

### Weekly Liquid Assets
| Period         | Daily Liquid Assets ($)   | Weekly Liquid Assets ($)   | Daily Liquid Assets (%)   | Weekly Liquid Assets (%)   |
|:---|:---|:---|:---|:---|
| Friday, Week 1 |  | $40395107887.64            |  | 99.0000%                   |
| Friday, Week 2 |  | $41353661995.14            |  | 99.0000%                   |
| Friday, Week 3 |  | $38457276426.87            |  | 99.0000%                   |
| Friday, Week 4 |  | $39035974217.46            |  | 99.0000%                   |

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

### Class: Unknown Class (—)

- **B.2 - Minimum Initial Investment:** $1000000.00

- **B.3 - Net Assets of Class:** $11213605372.90

- **B.4 - Shares Outstanding:** 11212249553.88

- **B.7.7 - 7-Day Net Yield:** 4.2000%

- **Person Paying for Fund Expenses?:** Yes

- **Expense Reimbursement/Waiver Description:** Fidelity Investments, Reimbursement Fees, -232699.01;

**Weekly Flows:**

| Period   | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| Week 1   | $350217377.19             | $443746055.61           |
| Week 2   | $331407701.62             | $406397207.09           |
| Week 3   | $313368791.05             | $216336365.97           |
| Week 4   | $228010753.22             | $278929722.51           |

**Monthly Shareholder Flow Activity:**

- **Gross Subscriptions for month:** $1427415277.74

- **Gross Redemptions for month:** $1543121280.89

### Class: Unknown Class (—)

- **B.2 - Minimum Initial Investment:** $1000000.00

- **B.3 - Net Assets of Class:** $1824958671.20

- **B.4 - Shares Outstanding:** 1825212324.84

- **B.7.7 - 7-Day Net Yield:** 4.0500%

- **Person Paying for Fund Expenses?:** Yes

- **Expense Reimbursement/Waiver Description:** Fidelity Investments, Reimbursement Fees, -28558.45;

**Weekly Flows:**

| Period   | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| Week 1   | $73399116.05              | $41980354.58            |
| Week 2   | $41725236.44              | $64254837.70            |
| Week 3   | $29851599.53              | $73686669.40            |
| Week 4   | $188530513.05             | $76405369.23            |

**Monthly Shareholder Flow Activity:**

- **Gross Subscriptions for month:** $421110913.39

- **Gross Redemptions for month:** $298033408.15

### Class: Unknown Class (—)

- **B.2 - Minimum Initial Investment:** $1000000.00

- **B.3 - Net Assets of Class:** $1729490493.82

- **B.4 - Shares Outstanding:** 1729219574.28

- **B.7.7 - 7-Day Net Yield:** 3.9500%

- **Person Paying for Fund Expenses?:** Yes

- **Expense Reimbursement/Waiver Description:** Fidelity Investments, Reimbursement Fees, -31567.44;

**Weekly Flows:**

| Period   | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| Week 1   | $52329606.06              | $153422691.62           |
| Week 2   | $293294929.29             | $169711886.09           |
| Week 3   | $48679921.56              | $28619803.82            |
| Week 4   | $530472411.89             | $794077291.70           |

**Monthly Shareholder Flow Activity:**

- **Gross Subscriptions for month:** $955887555.35

- **Gross Redemptions for month:** $1171472576.49

### Class: Unknown Class (—)

- **B.2 - Minimum Initial Investment:** $1000000.00

- **B.3 - Net Assets of Class:** $1006538892.94

- **B.4 - Shares Outstanding:** 1006599905.05

- **B.7.7 - 7-Day Net Yield:** 4.1500%

- **Person Paying for Fund Expenses?:** Yes

- **Expense Reimbursement/Waiver Description:** Fidelity Investments, Reimbursement Fees, -7240.66;

**Weekly Flows:**

| Period   | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| Week 1   | $23879336.31              | $25799825.49            |
| Week 2   | $66415818.91              | $59007361.74            |
| Week 3   | $10244216.57              | $8851676.91             |
| Week 4   | $27198096.66              | $40391858.54            |

**Monthly Shareholder Flow Activity:**

- **Gross Subscriptions for month:** $809110585.28

- **Gross Redemptions for month:** $136733897.15

### Class: Unknown Class (—)

- **B.2 - Minimum Initial Investment:** $1000000.00

- **B.3 - Net Assets of Class:** $452228492.63

- **B.4 - Shares Outstanding:** 452204292.71

- **B.7.7 - 7-Day Net Yield:** 3.7000%

- **Person Paying for Fund Expenses?:** Yes

- **Expense Reimbursement/Waiver Description:** Fidelity Investments, Reimbursement Fees, -6814.82;

**Weekly Flows:**

| Period   | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| Week 1   | $5387921.46               | $10022246.12            |
| Week 2   | $13447505.09              | $13509646.78            |
| Week 3   | $7744888.58               | $12574164.00            |
| Week 4   | $7219521.08               | $6220753.32             |

**Monthly Shareholder Flow Activity:**

- **Gross Subscriptions for month:** $40379342.53

- **Gross Redemptions for month:** $67922109.77

### Class: Unknown Class (—)

- **B.2 - Minimum Initial Investment:** $10000000.00

- **B.3 - Net Assets of Class:** $19299417209.61

- **B.4 - Shares Outstanding:** 19299955912.81

- **B.7.7 - 7-Day Net Yield:** 4.2400%

- **Person Paying for Fund Expenses?:** Yes

- **Expense Reimbursement/Waiver Description:** Fidelity Investments, Reimbursement Fees, -585765.21;

**Weekly Flows:**

| Period   | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| Week 1   | $1595025080.76            | $779426284.41           |
| Week 2   | $582841968.13             | $1975084941.14          |
| Week 3   | $725519174.38             | $1239032923.47          |
| Week 4   | $858802061.82             | $932237986.28           |

**Monthly Shareholder Flow Activity:**

- **Gross Subscriptions for month:** $4451701952.27

- **Gross Redemptions for month:** $5395542964.65

## Part C: Schedule of Portfolio Securities

### Security 1: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 2.04%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796XT1, C.4 - ISIN: US912796XT12, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $610135334.59
- **C.18.a - Value (excl. sponsor support):** $610135334.59
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.7200%
- **C.17 - Yield as of Reporting Date:** 2.0400%
- **C.11 - Maturity Date (WAM):** 2023-02-02
- **C.12 - Maturity Date (WAL):** 2023-02-02
- **C.13 - Final Legal Maturity Date:** 2023-02-02
- **Characteristics:** 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: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 3.64%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796ZT9, C.4 - ISIN: US912796ZT93, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $1953445225.35
- **C.18.a - Value (excl. sponsor support):** $1953445225.35
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 5.5000%
- **C.17 - Yield as of Reporting Date:** 3.6400%
- **C.11 - Maturity Date (WAM):** 2023-02-07
- **C.12 - Maturity Date (WAL):** 2023-02-07
- **C.13 - Final Legal Maturity Date:** 2023-02-07
- **Characteristics:** 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: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.08%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796ZU6, C.4 - ISIN: US912796ZU66, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $3659679777.93
- **C.18.a - Value (excl. sponsor support):** $3659679777.93
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 10.3000%
- **C.17 - Yield as of Reporting Date:** 4.0800%
- **C.11 - Maturity Date (WAM):** 2023-02-14
- **C.12 - Maturity Date (WAL):** 2023-02-14
- **C.13 - Final Legal Maturity Date:** 2023-02-14
- **Characteristics:** 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: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.31%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796Y60, C.4 - ISIN: US912796Y601, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $3256375880.79
- **C.18.a - Value (excl. sponsor support):** $3256375880.79
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 9.1700%
- **C.17 - Yield as of Reporting Date:** 4.3100%
- **C.11 - Maturity Date (WAM):** 2023-02-21
- **C.12 - Maturity Date (WAL):** 2023-02-21
- **C.13 - Final Legal Maturity Date:** 2023-02-21
- **Characteristics:** 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: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.31%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796YB9, C.4 - ISIN: US912796YB94, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $572953839.50
- **C.18.a - Value (excl. sponsor support):** $572953839.50
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.6100%
- **C.17 - Yield as of Reporting Date:** 4.3100%
- **C.11 - Maturity Date (WAM):** 2023-03-02
- **C.12 - Maturity Date (WAL):** 2023-03-02
- **C.13 - Final Legal Maturity Date:** 2023-03-02
- **Characteristics:** 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: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.32%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796Y78, C.4 - ISIN: US912796Y783, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $4214901571.25
- **C.18.a - Value (excl. sponsor support):** $4214901571.25
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 11.8600%
- **C.17 - Yield as of Reporting Date:** 4.3200%
- **C.11 - Maturity Date (WAM):** 2023-02-28
- **C.12 - Maturity Date (WAL):** 2023-02-28
- **C.13 - Final Legal Maturity Date:** 2023-02-28
- **Characteristics:** 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: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.37%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796T33, C.4 - ISIN: US912796T338, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $2646077957.10
- **C.18.a - Value (excl. sponsor support):** $2646077957.10
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 7.4500%
- **C.17 - Yield as of Reporting Date:** 4.3700%
- **C.11 - Maturity Date (WAM):** 2023-02-23
- **C.12 - Maturity Date (WAL):** 2023-02-23
- **C.13 - Final Legal Maturity Date:** 2023-02-23
- **Characteristics:** 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: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.39%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796YK9, C.4 - ISIN: US912796YK93, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $3271215861.41
- **C.18.a - Value (excl. sponsor support):** $3271215861.41
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 9.2100%
- **C.17 - Yield as of Reporting Date:** 4.3900%
- **C.11 - Maturity Date (WAM):** 2023-03-09
- **C.12 - Maturity Date (WAL):** 2023-03-09
- **C.13 - Final Legal Maturity Date:** 2023-03-09
- **Characteristics:** 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 9: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.39%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796Z69, C.4 - ISIN: US912796Z699, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $1314655875.93
- **C.18.a - Value (excl. sponsor support):** $1314655875.93
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.7000%
- **C.17 - Yield as of Reporting Date:** 4.3900%
- **C.11 - Maturity Date (WAM):** 2023-03-14
- **C.12 - Maturity Date (WAL):** 2023-03-14
- **C.13 - Final Legal Maturity Date:** 2023-03-14
- **Characteristics:** 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 10: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.42%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796Y86, C.4 - ISIN: US912796Y866, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $2470434884.79
- **C.18.a - Value (excl. sponsor support):** $2470434884.79
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 6.9500%
- **C.17 - Yield as of Reporting Date:** 4.4200%
- **C.11 - Maturity Date (WAM):** 2023-03-07
- **C.12 - Maturity Date (WAL):** 2023-03-07
- **C.13 - Final Legal Maturity Date:** 2023-03-07
- **Characteristics:** 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 11: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.45%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796Z77, C.4 - ISIN: US912796Z772, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $198802666.00
- **C.18.a - Value (excl. sponsor support):** $198802666.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.5600%
- **C.17 - Yield as of Reporting Date:** 4.4500%
- **C.11 - Maturity Date (WAM):** 2023-03-21
- **C.12 - Maturity Date (WAL):** 2023-03-21
- **C.13 - Final Legal Maturity Date:** 2023-03-21
- **Characteristics:** 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 12: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.48%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796Z85, C.4 - ISIN: US912796Z855, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $2631740758.00
- **C.18.a - Value (excl. sponsor support):** $2631740758.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 7.4100%
- **C.17 - Yield as of Reporting Date:** 4.4800%
- **C.11 - Maturity Date (WAM):** 2023-03-28
- **C.12 - Maturity Date (WAL):** 2023-03-28
- **C.13 - Final Legal Maturity Date:** 2023-03-28
- **Characteristics:** 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 13: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.48%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796CT4, C.4 - ISIN: US912796CT41, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $151911225.85
- **C.18.a - Value (excl. sponsor support):** $151911225.85
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.4300%
- **C.17 - Yield as of Reporting Date:** 4.4800%
- **C.11 - Maturity Date (WAM):** 2023-04-11
- **C.12 - Maturity Date (WAL):** 2023-04-11
- **C.13 - Final Legal Maturity Date:** 2023-04-11
- **Characteristics:** 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 14: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.49%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796YN3, C.4 - ISIN: US912796YN33, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $1095217061.76
- **C.18.a - Value (excl. sponsor support):** $1095217061.76
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.0800%
- **C.17 - Yield as of Reporting Date:** 4.4900%
- **C.11 - Maturity Date (WAM):** 2023-04-06
- **C.12 - Maturity Date (WAL):** 2023-04-06
- **C.13 - Final Legal Maturity Date:** 2023-04-06
- **Characteristics:** 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 15: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.54%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796YV5, C.4 - ISIN: US912796YV58, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $1187258496.00
- **C.18.a - Value (excl. sponsor support):** $1187258496.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.3400%
- **C.17 - Yield as of Reporting Date:** 4.5400%
- **C.11 - Maturity Date (WAM):** 2023-04-27
- **C.12 - Maturity Date (WAL):** 2023-04-27
- **C.13 - Final Legal Maturity Date:** 2023-04-27
- **Characteristics:** 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 16: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.55%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796YU7, C.4 - ISIN: US912796YU75, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $297323448.00
- **C.18.a - Value (excl. sponsor support):** $297323448.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.8400%
- **C.17 - Yield as of Reporting Date:** 4.5500%
- **C.11 - Maturity Date (WAM):** 2023-04-13
- **C.12 - Maturity Date (WAL):** 2023-04-13
- **C.13 - Final Legal Maturity Date:** 2023-04-13
- **Characteristics:** 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 17: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.57%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797FD4, C.4 - ISIN: US912797FD45, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $987769470.00
- **C.18.a - Value (excl. sponsor support):** $987769470.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 2.7800%
- **C.17 - Yield as of Reporting Date:** 4.5700%
- **C.11 - Maturity Date (WAM):** 2023-05-09
- **C.12 - Maturity Date (WAL):** 2023-05-09
- **C.13 - Final Legal Maturity Date:** 2023-05-09
- **Characteristics:** 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 18: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.59%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796YW3, C.4 - ISIN: US912796YW32, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $612776913.20
- **C.18.a - Value (excl. sponsor support):** $612776913.20
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.7200%
- **C.17 - Yield as of Reporting Date:** 4.5900%
- **C.11 - Maturity Date (WAM):** 2023-05-04
- **C.12 - Maturity Date (WAL):** 2023-05-04
- **C.13 - Final Legal Maturity Date:** 2023-05-04
- **Characteristics:** 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 19: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.59%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796ZE2, C.4 - ISIN: US912796ZE25, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $162934302.30
- **C.18.a - Value (excl. sponsor support):** $162934302.30
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.4600%
- **C.17 - Yield as of Reporting Date:** 4.5900%
- **C.11 - Maturity Date (WAM):** 2023-05-11
- **C.12 - Maturity Date (WAL):** 2023-05-11
- **C.13 - Final Legal Maturity Date:** 2023-05-11
- **Characteristics:** 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 20: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.61%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797FE2, C.4 - ISIN: US912797FE28, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $1282846500.00
- **C.18.a - Value (excl. sponsor support):** $1282846500.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.6100%
- **C.17 - Yield as of Reporting Date:** 4.6100%
- **C.11 - Maturity Date (WAM):** 2023-05-16
- **C.12 - Maturity Date (WAL):** 2023-05-16
- **C.13 - Final Legal Maturity Date:** 2023-05-16
- **Characteristics:** 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 21: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.64%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797FF9, C.4 - ISIN: US912797FF92, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $345049323.50
- **C.18.a - Value (excl. sponsor support):** $345049323.50
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.9700%
- **C.17 - Yield as of Reporting Date:** 4.6400%
- **C.11 - Maturity Date (WAM):** 2023-05-23
- **C.12 - Maturity Date (WAL):** 2023-05-23
- **C.13 - Final Legal Maturity Date:** 2023-05-23
- **Characteristics:** 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 22: U.S. Treasury Bills

- **C.1 - Title:** U.S. Treasury Bills, 4.65%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912797FG7, C.4 - ISIN: US912797FG75, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $344725647.00
- **C.18.a - Value (excl. sponsor support):** $344725647.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.9700%
- **C.17 - Yield as of Reporting Date:** 4.6500%
- **C.11 - Maturity Date (WAM):** 2023-05-30
- **C.12 - Maturity Date (WAL):** 2023-05-30
- **C.13 - Final Legal Maturity Date:** 2023-05-30
- **Characteristics:** 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 23: U.S. Treasury Notes

- **C.1 - Title:** U.S. Treasury Notes, 4.20%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CBN0, C.4 - ISIN: US91282CBN02, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $249169455.00
- **C.18.a - Value (excl. sponsor support):** $249169455.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.7000%
- **C.17 - Yield as of Reporting Date:** 4.4300%
- **C.11 - Maturity Date (WAM):** 2023-02-28
- **C.12 - Maturity Date (WAL):** 2023-02-28
- **C.13 - Final Legal Maturity Date:** 2023-02-28
- **Characteristics:** 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 24: U.S. Treasury Notes

- **C.1 - Title:** U.S. Treasury Notes, 4.26%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912828P79, C.4 - ISIN: US912828P790, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $457935074.10
- **C.18.a - Value (excl. sponsor support):** $457935074.10
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.2900%
- **C.17 - Yield as of Reporting Date:** 4.4800%
- **C.11 - Maturity Date (WAM):** 2023-02-28
- **C.12 - Maturity Date (WAL):** 2023-02-28
- **C.13 - Final Legal Maturity Date:** 2023-02-28
- **Characteristics:** 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 25: U.S. Treasury Notes

- **C.1 - Title:** U.S. Treasury Notes, 4.55%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CEL1, C.4 - ISIN: US91282CEL19, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $43943170.04
- **C.18.a - Value (excl. sponsor support):** $43943170.04
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.1200%
- **C.17 - Yield as of Reporting Date:** 4.6600%
- **C.11 - Maturity Date (WAM):** 2023-02-01
- **C.12 - Maturity Date (WAL):** 2024-04-30
- **C.13 - Final Legal Maturity Date:** 2024-04-30
- **Characteristics:** 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 26: U.S. Treasury Notes

- **C.1 - Title:** U.S. Treasury Notes, 4.66%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CDE8, C.4 - ISIN: US91282CDE84, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $724127605.00
- **C.18.a - Value (excl. sponsor support):** $724127605.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 2.0400%
- **C.17 - Yield as of Reporting Date:** 4.6300%
- **C.11 - Maturity Date (WAM):** 2023-02-01
- **C.12 - Maturity Date (WAL):** 2023-10-31
- **C.13 - Final Legal Maturity Date:** 2023-10-31
- **Characteristics:** 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 27: U.S. Treasury Notes

- **C.1 - Title:** U.S. Treasury Notes, 4.66%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CBY6, C.4 - ISIN: US91282CBY66, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $400215360.00
- **C.18.a - Value (excl. sponsor support):** $400215360.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.1300%
- **C.17 - Yield as of Reporting Date:** 4.3900%
- **C.11 - Maturity Date (WAM):** 2023-02-01
- **C.12 - Maturity Date (WAL):** 2023-04-30
- **C.13 - Final Legal Maturity Date:** 2023-04-30
- **Characteristics:** 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 28: U.S. Treasury Notes

- **C.1 - Title:** U.S. Treasury Notes, 4.66%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CCQ2, C.4 - ISIN: US91282CCQ24, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $404555295.15
- **C.18.a - Value (excl. sponsor support):** $404555295.15
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.1400%
- **C.17 - Yield as of Reporting Date:** 4.6300%
- **C.11 - Maturity Date (WAM):** 2023-02-01
- **C.12 - Maturity Date (WAL):** 2023-07-31
- **C.13 - Final Legal Maturity Date:** 2023-07-31
- **Characteristics:** 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 29: U.S. Treasury Notes

- **C.1 - Title:** U.S. Treasury Notes, 4.67%
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 91282CFD8, C.4 - ISIN: US91282CFD83, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $632885266.94
- **C.18.a - Value (excl. sponsor support):** $632885266.94
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.7800%
- **C.17 - Yield as of Reporting Date:** 4.6900%
- **C.11 - Maturity Date (WAM):** 2023-02-01
- **C.12 - Maturity Date (WAL):** 2024-07-31
- **C.13 - Final Legal Maturity Date:** 2024-07-31
- **Characteristics:** 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 Colchester Street Trust: Treasury Only Portfolio

**Date:** 2023-02-02

**By:** Laura M. Del Prato

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

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