# EDGAR Filing Document

**Accession Number:** 0001392417
**File Stem:** 0001868488-23-000012
**Filing Date:** 2023-3
**Character Count:** 30233
**Document Hash:** ebff6972345968c19096379cfed84991
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001868488-23-000012.hdr.sgml**: 20230307

**ACCESSION NUMBER**: 0001868488-23-000012

**CONFORMED SUBMISSION TYPE**: N-MFP2

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20230228

**FILED AS OF DATE**: 20230307

**DATE AS OF CHANGE**: 20230307

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS INSTITUTIONAL MONEY MARKET PORTFOLIO, A SERIES OF THE MFS SERIES TRUST XIV
- **CENTRAL INDEX KEY:** 0001392417
- **IRS NUMBER:** 208538605
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0831

**FILING VALUES:**
- **FORM TYPE:** N-MFP2
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-22033
- **FILM NUMBER:** 23711480

**BUSINESS ADDRESS:**
- **STREET 1:** 111 HUNTINGTON AVENUE
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199
- **BUSINESS PHONE:** 617-954-5000

**MAIL ADDRESS:**
- **STREET 1:** 111 HUNTINGTON AVENUE
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS Institutional Money Market Portfolio, a series of the MFS Series Trust XIV
- **DATE OF NAME CHANGE:** 20090313

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS Series Trust XIV
- **DATE OF NAME CHANGE:** 20070308

## Series and Classes Contracts Data

### MFS Institutional Money Market Portfolio (Series ID: S000017728)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000048969 | Class A      |  |

# 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):** 2023-02-28

**EDGAR Series Identifier:** S000017728

**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                 | MASSACHUSETTS FINANCIAL SERVICES COMPANY           |  |
| A.4    | Independent Public Accountant | DELOITTE & TOUCHE LLP<br>City: BOSTON<br>State: MA |  |
| A.6    | Transfer Agent                | MFS SERVICE CENTER, INC.<br>CIK: 0000769188        | 084-01316         |

### Fund Characteristics & Assets

- **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:** Prime

- **A.11 - WAM:** 12 days

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

- **Total Value of Portfolio Securities:** $6451609757.00

- **Amortized Cost of Portfolio Securities:** $261757000.00

- **Cash:** $463.31

- **Total Other Assets:** $50460.64

- **Total Liabilities:** $21803793.76

- **Net Assets of Series:** $6429856887.19

- **Number of Shares Outstanding (Series):** 6429545543.91

- **7-Day Gross Yield:** 4.5600%

### Weekly Liquid Assets
| Period         | Daily Liquid Assets ($)   | Weekly Liquid Assets ($)   | Daily Liquid Assets (%)   | Weekly Liquid Assets (%)   |
|:---|:---|:---|:---|:---|
| Friday, Week 1 |  | $5079678190.88             |  | 84.8900%                   |
| Friday, Week 2 |  | $4963735717.49             |  | 83.0000%                   |
| Friday, Week 3 |  | $5304373590.77             |  | 82.0000%                   |
| Friday, Week 4 |  | $5373860401.79             |  | 81.1200%                   |

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

### Class: Unknown Class (—)

- **B.2 - Minimum Initial Investment:** $1.00

- **B.3 - Net Assets of Class:** $6429856887.19

- **B.4 - Shares Outstanding:** 6429545543.91

- **B.7.7 - 7-Day Net Yield:** 4.5500%

- **Person Paying for Fund Expenses?:** No

**Weekly Flows:**

| Period   | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| Week 1   | $1006178710.25            | $990231151.55           |
| Week 2   | $1206222099.97            | $1214909426.40          |
| Week 3   | $1412265555.21            | $929478603.26           |
| Week 4   | $752974542.55             | $602895821.22           |

**Monthly Shareholder Flow Activity:**

- **Gross Subscriptions for month:** $4451244697.23

- **Gross Redemptions for month:** $3924754438.20

## Part C: Schedule of Portfolio Securities

### Security 1: Apple, Inc.

- **C.1 - Title:** Apple, Inc. 4.453
- **C.6 - Investment Category:** Non-Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 03785EQ64, C.4 - ISIN: US03785EQ647, C.3 - LEI: HWUPKR0MPOU8FGXBT394
- **C.18 - Value (incl. sponsor support):** $224830275.75
- **C.18.a - Value (excl. sponsor support):** $224830275.75
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.5000%
- **C.17 - Yield as of Reporting Date:** 4.4500%
- **C.11 - Maturity Date (WAM):** 2023-03-06
- **C.12 - Maturity Date (WAL):** 2023-03-06
- **C.13 - Final Legal Maturity Date:** 2023-03-06
- **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.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 2: Australia & New Zealand Banking Group Ltd.

- **C.1 - Title:** Australia & New Zealand Banking Group Ltd. 4.655
- **C.6 - Investment Category:** Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 05253CRB4, C.4 - ISIN: US05253CRB45, C.3 - LEI: JHE42UYNWWTJB8YTTU19
- **C.18 - Value (incl. sponsor support):** $184063946.24
- **C.18.a - Value (excl. sponsor support):** $184063946.24
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 2.8600%
- **C.17 - Yield as of Reporting Date:** 4.6600%
- **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.21 Is a Weekly Liquid Asset? No, C.23 Categorized at Level 3? No

### Security 3: BOFA Securities Repurchase Agreement

- **C.1 - Title:** BOFA Securities Repurchase Agreement 4.51
- **C.6 - Investment Category:** U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash
- **Identifiers:** C.3 - CUSIP: 5H6493D, C.3 - LEI: 549300HN4UKV1E2R3U73, CIK: 0000065100
- **C.18 - Value (incl. sponsor support):** $117757000.00
- **C.18.a - Value (excl. sponsor support):** $117757000.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.8300%
- **C.17 - Yield as of Reporting Date:** 4.5100%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-03-01
- **C.13 - Final Legal Maturity Date:** 2023-03-01
- **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: Coca-Cola Co.

- **C.1 - Title:** Coca-Cola Co. 4.743
- **C.6 - Investment Category:** Non-Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 19121BS91, C.4 - ISIN: US19121BS912, C.3 - LEI: UWJKFUJFZ02DKWI3RY53
- **C.18 - Value (incl. sponsor support):** $49549180.50
- **C.18.a - Value (excl. sponsor support):** $49549180.50
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.7700%
- **C.17 - Yield as of Reporting Date:** 4.7400%
- **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.21 Is a Weekly Liquid Asset? No, C.23 Categorized at Level 3? No

### Security 5: Federal Home Loan Banks

- **C.1 - Title:** Federal Home Loan Banks 0.000
- **C.6 - Investment Category:** U.S. Government Agency Debt
- **Identifiers:** C.3 - CUSIP: 313384CM9, C.4 - ISIN: US313384CM96, C.3 - LEI: 2549001DPIFGXC1TOL40
- **C.18 - Value (incl. sponsor support):** $1655500000.00
- **C.18.a - Value (excl. sponsor support):** $1655500000.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 25.7500%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-03-01
- **C.13 - Final Legal Maturity Date:** 2023-03-01
- **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: Federal Home Loan Banks

- **C.1 - Title:** Federal Home Loan Banks 4.499
- **C.6 - Investment Category:** U.S. Government Agency Debt
- **Identifiers:** C.3 - CUSIP: 313384CU1, C.4 - ISIN: US313384CU13, C.3 - LEI: 2549001DPIFGXC1TOL40
- **C.18 - Value (incl. sponsor support):** $499559420.00
- **C.18.a - Value (excl. sponsor support):** $499559420.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 7.7700%
- **C.17 - Yield as of Reporting Date:** 4.5000%
- **C.11 - Maturity Date (WAM):** 2023-03-08
- **C.12 - Maturity Date (WAL):** 2023-03-08
- **C.13 - Final Legal Maturity Date:** 2023-03-08
- **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.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 7: Federal Home Loan Mortgage Corp.

- **C.1 - Title:** Federal Home Loan Mortgage Corp. 0.000
- **C.6 - Investment Category:** U.S. Government Agency Debt
- **Identifiers:** C.3 - CUSIP: 313396CM3, C.4 - ISIN: US313396CM35, C.3 - LEI: S6XOOCT0IEG5ABCC6L87
- **C.18 - Value (incl. sponsor support):** $712808000.00
- **C.18.a - Value (excl. sponsor support):** $712808000.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 11.0900%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-03-01
- **C.13 - Final Legal Maturity Date:** 2023-03-01
- **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: Goldman Sachs Repurchase Agreement

- **C.1 - Title:** Goldman Sachs Repurchase Agreement 4.49
- **C.6 - Investment Category:** U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash
- **Identifiers:** C.3 - CUSIP: 5H6495D, C.3 - LEI: FOR8UP27PHTHYVLBNG30, CIK: 0000042352
- **C.18 - Value (incl. sponsor support):** $50000000.00
- **C.18.a - Value (excl. sponsor support):** $50000000.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.7800%
- **C.17 - Yield as of Reporting Date:** 4.4900%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-03-01
- **C.13 - Final Legal Maturity Date:** 2023-03-01
- **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: J.P. Morgan Repurchase Agreement

- **C.1 - Title:** J.P. Morgan Repurchase Agreement 4.51
- **C.6 - Investment Category:** U.S. Treasury Repurchase Agreement, if collateralized only by U.S. Treasuries (including Strips) and cash
- **Identifiers:** C.3 - CUSIP: 5H6494D, C.3 - LEI: ZBUT11V806EZRVTWT807, CIK: 0000782124
- **C.18 - Value (incl. sponsor support):** $94000000.00
- **C.18.a - Value (excl. sponsor support):** $94000000.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.4600%
- **C.17 - Yield as of Reporting Date:** 4.5100%
- **C.11 - Maturity Date (WAM):** 2023-03-01
- **C.12 - Maturity Date (WAL):** 2023-03-01
- **C.13 - Final Legal Maturity Date:** 2023-03-01
- **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: Johnson & Johnson

- **C.1 - Title:** Johnson & Johnson 4.457
- **C.6 - Investment Category:** Non-Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 47816GQD4, C.4 - ISIN: US47816GQD42, C.3 - LEI: 549300G0CFPGEF6X2043
- **C.18 - Value (incl. sponsor support):** $149757766.50
- **C.18.a - Value (excl. sponsor support):** $149757766.50
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 2.3300%
- **C.17 - Yield as of Reporting Date:** 4.4600%
- **C.11 - Maturity Date (WAM):** 2023-03-13
- **C.12 - Maturity Date (WAL):** 2023-03-13
- **C.13 - Final Legal Maturity Date:** 2023-03-13
- **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.21 Is a Weekly Liquid Asset? No, C.23 Categorized at Level 3? No

### Security 11: Johnson & Johnson

- **C.1 - Title:** Johnson & Johnson 4.776
- **C.6 - Investment Category:** Non-Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 47816GSF7, C.4 - ISIN: US47816GSF71, C.3 - LEI: 549300G0CFPGEF6X2043
- **C.18 - Value (incl. sponsor support):** $99029100.00
- **C.18.a - Value (excl. sponsor support):** $99029100.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.5400%
- **C.17 - Yield as of Reporting Date:** 4.7800%
- **C.11 - Maturity Date (WAM):** 2023-05-15
- **C.12 - Maturity Date (WAL):** 2023-05-15
- **C.13 - Final Legal Maturity Date:** 2023-05-15
- **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.21 Is a Weekly Liquid Asset? No, C.23 Categorized at Level 3? No

### Security 12: Mizuho Bank Ltd.

- **C.1 - Title:** Mizuho Bank Ltd. 4.708
- **C.6 - Investment Category:** Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 60689GRQ1, C.4 - ISIN: US60689GRQ19, C.3 - LEI: RB0PEZSDGCO3JS6CEU02
- **C.18 - Value (incl. sponsor support):** $99292486.00
- **C.18.a - Value (excl. sponsor support):** $99292486.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.5400%
- **C.17 - Yield as of Reporting Date:** 4.7100%
- **C.11 - Maturity Date (WAM):** 2023-04-24
- **C.12 - Maturity Date (WAL):** 2023-04-24
- **C.13 - Final Legal Maturity Date:** 2023-04-24
- **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.21 Is a Weekly Liquid Asset? No, C.23 Categorized at Level 3? No

### Security 13: National Bank of Canada

- **C.1 - Title:** National Bank of Canada 4.660
- **C.6 - Investment Category:** Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 63307MR35, C.4 - ISIN: US63307MR358
- **C.18 - Value (incl. sponsor support):** $149348191.50
- **C.18.a - Value (excl. sponsor support):** $149348191.50
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 2.3200%
- **C.17 - Yield as of Reporting Date:** 4.6600%
- **C.11 - Maturity Date (WAM):** 2023-04-03
- **C.12 - Maturity Date (WAL):** 2023-04-03
- **C.13 - Final Legal Maturity Date:** 2023-04-03
- **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.21 Is a Weekly Liquid Asset? No, C.23 Categorized at Level 3? No

### Security 14: Novartis Finance Corp.

- **C.1 - Title:** Novartis Finance Corp. 4.522
- **C.6 - Investment Category:** Non-Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 6698M5Q36, C.4 - ISIN: US6698M5Q368
- **C.18 - Value (incl. sponsor support):** $19992568.40
- **C.18.a - Value (excl. sponsor support):** $19992568.40
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.3100%
- **C.17 - Yield as of Reporting Date:** 4.5200%
- **C.11 - Maturity Date (WAM):** 2023-03-03
- **C.12 - Maturity Date (WAL):** 2023-03-03
- **C.13 - Final Legal Maturity Date:** 2023-03-03
- **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.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 15: Novartis Finance Corp.

- **C.1 - Title:** Novartis Finance Corp. 4.551
- **C.6 - Investment Category:** Non-Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 6698M5QL6, C.4 - ISIN: US6698M5QL64
- **C.18 - Value (incl. sponsor support):** $45884437.88
- **C.18.a - Value (excl. sponsor support):** $45884437.88
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.7100%
- **C.17 - Yield as of Reporting Date:** 4.5500%
- **C.11 - Maturity Date (WAM):** 2023-03-20
- **C.12 - Maturity Date (WAL):** 2023-03-20
- **C.13 - Final Legal Maturity Date:** 2023-03-20
- **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.21 Is a Weekly Liquid Asset? No, C.23 Categorized at Level 3? No

### Security 16: Siemens Capital Co. LLC

- **C.1 - Title:** Siemens Capital Co. LLC 4.521
- **C.6 - Investment Category:** Non-Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 82619UQ23, C.4 - ISIN: US82619UQ234, C.3 - LEI: EOSCVWUER252U910GR08
- **C.18 - Value (incl. sponsor support):** $53986631.76
- **C.18.a - Value (excl. sponsor support):** $53986631.76
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.8400%
- **C.17 - Yield as of Reporting Date:** 4.5200%
- **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.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

### Security 17: Toronto-Dominion Bank

- **C.1 - Title:** Toronto-Dominion Bank 4.567
- **C.6 - Investment Category:** Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 89119BQW9, C.4 - ISIN: US89119BQW99, C.3 - LEI: PT3QB789TSUIDF371261
- **C.18 - Value (incl. sponsor support):** $99619667.00
- **C.18.a - Value (excl. sponsor support):** $99619667.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.5500%
- **C.17 - Yield as of Reporting Date:** 4.5700%
- **C.11 - Maturity Date (WAM):** 2023-03-30
- **C.12 - Maturity Date (WAL):** 2023-03-30
- **C.13 - Final Legal Maturity Date:** 2023-03-30
- **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.21 Is a Weekly Liquid Asset? No, C.23 Categorized at Level 3? No

### Security 18: Toyota Motor Credit Corp.

- **C.1 - Title:** Toyota Motor Credit Corp. 4.654
- **C.6 - Investment Category:** Non-Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 89233HRA4, C.4 - ISIN: US89233HRA40, C.3 - LEI: Z2VZBHUMB7PWWJ63I008
- **C.18 - Value (incl. sponsor support):** $74606742.00
- **C.18.a - Value (excl. sponsor support):** $74606742.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.1600%
- **C.17 - Yield as of Reporting Date:** 4.6500%
- **C.11 - Maturity Date (WAM):** 2023-04-10
- **C.12 - Maturity Date (WAL):** 2023-04-10
- **C.13 - Final Legal Maturity Date:** 2023-04-10
- **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.21 Is a Weekly Liquid Asset? No, C.23 Categorized at Level 3? No

### Security 19: Toyota Motor Credit Corp.

- **C.1 - Title:** Toyota Motor Credit Corp. 4.506
- **C.6 - Investment Category:** Non-Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 89233HQA5, C.4 - ISIN: US89233HQA58, C.3 - LEI: Z2VZBHUMB7PWWJ63I008
- **C.18 - Value (incl. sponsor support):** $124842603.75
- **C.18.a - Value (excl. sponsor support):** $124842603.75
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 1.9400%
- **C.17 - Yield as of Reporting Date:** 4.5100%
- **C.11 - Maturity Date (WAM):** 2023-03-10
- **C.12 - Maturity Date (WAL):** 2023-03-10
- **C.13 - Final Legal Maturity Date:** 2023-03-10
- **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.21 Is a Weekly Liquid Asset? No, C.23 Categorized at Level 3? No

### Security 20: United States Treasury Bill

- **C.1 - Title:** United States Treasury Bill 4.468
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796YL7, C.4 - ISIN: US912796YL76, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $204618167.00
- **C.18.a - Value (excl. sponsor support):** $204618167.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.1800%
- **C.17 - Yield as of Reporting Date:** 4.4700%
- **C.11 - Maturity Date (WAM):** 2023-03-16
- **C.12 - Maturity Date (WAL):** 2023-03-16
- **C.13 - Final Legal Maturity Date:** 2023-03-16
- **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: United States Treasury Bill

- **C.1 - Title:** United States Treasury Bill 4.478
- **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):** $327673685.92
- **C.18.a - Value (excl. sponsor support):** $327673685.92
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 5.1000%
- **C.17 - Yield as of Reporting Date:** 4.4800%
- **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 22: United States Treasury Bill

- **C.1 - Title:** United States Treasury Bill 4.462
- **C.6 - Investment Category:** U.S. Treasury Debt
- **Identifiers:** C.3 - CUSIP: 912796U31, C.4 - ISIN: US912796U310, C.3 - LEI: 254900HROIFWPRGM1V77
- **C.18 - Value (incl. sponsor support):** $240365859.11
- **C.18.a - Value (excl. sponsor support):** $240365859.11
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.7400%
- **C.17 - Yield as of Reporting Date:** 4.4600%
- **C.11 - Maturity Date (WAM):** 2023-03-23
- **C.12 - Maturity Date (WAL):** 2023-03-23
- **C.13 - Final Legal Maturity Date:** 2023-03-23
- **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 23: United States Treasury Bill

- **C.1 - Title:** United States Treasury Bill 4.403
- **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):** $174978671.00
- **C.18.a - Value (excl. sponsor support):** $174978671.00
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 2.7200%
- **C.17 - Yield as of Reporting Date:** 4.4000%
- **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 24: United States Treasury Bill

- **C.1 - Title:** United States Treasury Bill 4.486
- **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):** $252813306.24
- **C.18.a - Value (excl. sponsor support):** $252813306.24
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.9300%
- **C.17 - Yield as of Reporting Date:** 4.4900%
- **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 25: United States Treasury Bill

- **C.1 - Title:** United States Treasury Bill 4.550
- **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):** $248157523.44
- **C.18.a - Value (excl. sponsor support):** $248157523.44
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.8600%
- **C.17 - Yield as of Reporting Date:** 4.5500%
- **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 26: United States Treasury Bill

- **C.1 - Title:** United States Treasury Bill 4.513
- **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):** $220948710.87
- **C.18.a - Value (excl. sponsor support):** $220948710.87
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.4400%
- **C.17 - Yield as of Reporting Date:** 4.5100%
- **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 27: United States Treasury Bill

- **C.1 - Title:** United States Treasury Bill 4.483
- **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):** $217648176.34
- **C.18.a - Value (excl. sponsor support):** $217648176.34
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 3.3800%
- **C.17 - Yield as of Reporting Date:** 4.4800%
- **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 28: Walmart, Inc.

- **C.1 - Title:** Walmart, Inc. 4.502
- **C.6 - Investment Category:** Non-Financial Company Commercial Paper
- **Identifiers:** C.3 - CUSIP: 93114FQ31, C.4 - ISIN: US93114FQ317, C.3 - LEI: Y87794H0US1R65VBXU25
- **C.18 - Value (incl. sponsor support):** $59977639.80
- **C.18.a - Value (excl. sponsor support):** $59977639.80
- **Principal Amount:** —
- **Amortized Cost:** —
- **Fair Value:** —
- **C.19 - Percentage of Net Assets:** 0.9300%
- **C.17 - Yield as of Reporting Date:** 4.5000%
- **C.11 - Maturity Date (WAM):** 2023-03-03
- **C.12 - Maturity Date (WAL):** 2023-03-03
- **C.13 - Final Legal Maturity Date:** 2023-03-03
- **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.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

## N-MFP: Signatures

**Registrant:** MFS INSTITUTIONAL MONEY MARKET PORTFOLIO, A SERIES OF THE MFS SERIES TRUST XIV

**Date:** 2023-03-06

**By:** Kino Clark

**Name of Signing Officer:** Kino Clark

**Title of Signing Officer:** Assistant Treasurer