# EDGAR Filing Document

**Accession Number:** 0001107414
**File Stem:** 0001410368-25-033482
**Filing Date:** 2025-12
**Character Count:** 42412
**Document Hash:** fc8869b1f80dc9cd47b2a419d4a11cb1
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-25-033482.hdr.sgml**: 20251205

**ACCESSION NUMBER**: 0001410368-25-033482

**CONFORMED SUBMISSION TYPE**: N-MFP3

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251130

**FILED AS OF DATE**: 20251205

**DATE AS OF CHANGE**: 20251205

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** STATE STREET INSTITUTIONAL INVESTMENT TRUST
- **CENTRAL INDEX KEY:** 0001107414

**ORGANIZATION NAME:**
- **EIN:** 046910804
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** N-MFP3
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-09819
- **FILM NUMBER:** 251551835

**BUSINESS ADDRESS:**
- **STREET 1:** ONE CONGRESS STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02114
- **BUSINESS PHONE:** 6176643920

**MAIL ADDRESS:**
- **STREET 1:** ONE CONGRESS STREET
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02114

## Series and Classes Contracts Data

### State Street Institutional Treasury Money Market Fund (Series ID: S000019117)

| Class ID   | Class Name                    | Ticker Symbol   |
|:---|:---|:---|
| C000052877 | Premier Class                 | TRIXX           |
| C000052878 | Investment Class              | TRVXX           |
| C000143780 | Administration Class          | SSKXX           |
| C000143781 | Institutional Class           | SSJXX           |
| C000143782 | Investor Class                | SSNXX           |
| C000230479 | Bancroft Capital Class        | VTTXX           |
| C000231445 | Cabrera Capital Markets Class | CSJXX           |
| C000231446 | Blaylock Van Class            |  |
| C000231964 | Opportunity Class             | OPRXX           |

# Form N-MFP3: Monthly Schedule of Portfolio Holdings

## N-MFP: Filer Information
**Submission Type:** N-MFP3
**CIK:** 0001107414

### General Information

**Report for (YYYY-MM-DD):** 2025-11-30

**Registrant Full Name:** STATE STREET INSTITUTIONAL INVESTMENT TRUST

**CIK Number of Registrant:** 0001107414

**LEI of Registrant:** 549300P1E098W6ES7M39

**Name of Series:** State Street Institutional Treasury Money Market Fund

**LEI of Series:** 549300Q3FHSMZ70NLT76

**EDGAR Series Identifier:** S000019117

**Total number of share classes in the series:** 9

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

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

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

### Service Providers
| Role                          | Details                                         | File/CIK Number   |
|:---|:---|:---|
| Investment Adviser            | SSGA Funds Management, Inc.                     | 801-60103         |
| Independent Public Accountant | Ernst & Young  LLP<br>City: Boston<br>State: MA |  |
| Administrator                 | SSGA Funds Management, Inc.                     |  |
| Transfer Agent                | SS&C GIDS, Inc.<br>CIK: 0000027048              | 084-00448         |

### Fund Characteristics & Assets

- **Securities Act File Number:** 333-30810

- **Is this a Feeder Fund?:** Yes

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

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

- **Money Market Fund Category:** Government

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

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

- **WAM:** 1 days

- **WAL:** 1 days

- **Total Value of Portfolio Securities:** $14515718196.75

- **Amortized Cost of Portfolio Securities:** $14515718196.75

- **Cash:** $0.00

- **Total Other Assets:** $0.00

- **Total Liabilities:** $43566917.90

- **Net Assets of Series:** $14472151278.85

- **Number of Shares Outstanding (Series):** 14471978468.6800

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

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

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

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

### Daily & Weekly Liquid Assets
| Date       | Daily Liquid Assets ($)   | Weekly Liquid Assets ($)   | Daily Liquid Assets (%)   | Weekly Liquid Assets (%)   |
|:---|:---|:---|:---|:---|
| 2025-11-03 | $14522838376.80           | $14522838376.80            | 99.9700%                  | 99.9700%                   |
| 2025-11-04 | $14590065724.45           | $14590065724.45            | 99.9700%                  | 99.9700%                   |
| 2025-11-05 | $14640754239.00           | $14640754239.00            | 99.9700%                  | 99.9700%                   |
| 2025-11-06 | $14226072486.67           | $14226072486.67            | 99.9600%                  | 99.9600%                   |
| 2025-11-07 | $14100514405.11           | $14100514405.11            | 99.9600%                  | 99.9600%                   |
| 2025-11-10 | $14906254726.07           | $14906254726.07            | 99.9500%                  | 99.9500%                   |
| 2025-11-11 | $0.00                     | $0.00                      | 0.0000%                   | 0.0000%                    |
| 2025-11-12 | $14713462113.43           | $14713462113.43            | 99.9500%                  | 99.9500%                   |
| 2025-11-13 | $14333836468.03           | $14333836468.03            | 99.9500%                  | 99.9500%                   |
| 2025-11-14 | $14337002751.79           | $14337002751.79            | 99.9400%                  | 99.9400%                   |
| 2025-11-17 | $14535284166.86           | $14535284166.86            | 99.9400%                  | 99.9400%                   |
| 2025-11-18 | $14585049818.97           | $14585049818.97            | 99.9400%                  | 99.9400%                   |
| 2025-11-19 | $15134269342.32           | $15134269342.32            | 99.9400%                  | 99.9400%                   |
| 2025-11-20 | $14866176283.55           | $14866176283.55            | 99.9300%                  | 99.9300%                   |
| 2025-11-21 | $15314643190.29           | $15314643190.29            | 99.9300%                  | 99.9300%                   |
| 2025-11-24 | $15193976243.17           | $15193976243.17            | 99.9300%                  | 99.9300%                   |
| 2025-11-25 | $15132227261.55           | $15132227261.55            | 99.9200%                  | 99.9200%                   |
| 2025-11-26 | $16494680492.88           | $16494680492.88            | 99.9300%                  | 99.9300%                   |
| 2025-11-28 | $15765740262.50           | $15765740262.50            | 99.9200%                  | 99.9200%                   |

### 7-Day Gross Yield
| Date       | 7-Day Gross Yield   |
|:---|:---|
| 2025-11-03 | 4.0400%             |
| 2025-11-04 | 4.0400%             |
| 2025-11-05 | 4.0300%             |
| 2025-11-06 | 4.0300%             |
| 2025-11-07 | 4.0200%             |
| 2025-11-10 | 4.0200%             |
| 2025-11-11 | 0.0000%             |
| 2025-11-12 | 4.0200%             |
| 2025-11-13 | 4.0200%             |
| 2025-11-14 | 4.0100%             |
| 2025-11-17 | 4.0100%             |
| 2025-11-18 | 4.0100%             |
| 2025-11-19 | 4.0000%             |
| 2025-11-20 | 4.0000%             |
| 2025-11-21 | 4.0000%             |
| 2025-11-24 | 4.0000%             |
| 2025-11-25 | 4.0000%             |
| 2025-11-26 | 3.9900%             |
| 2025-11-28 | 3.9900%             |

### Daily Net Asset Value per Share (Series)
| Date       | Net Asset Value per Share   |
|:---|:---|
| 2025-11-03 | 1.0001                      |
|  |  |
| 2025-11-04 | 1.0001                      |
|  |  |
| 2025-11-05 | 1.0001                      |
|  |  |
| 2025-11-06 | 1.0002                      |
|  |  |
| 2025-11-07 | 1.0002                      |
|  |  |
| 2025-11-10 | 1.0001                      |
|  |  |
| 2025-11-11 | 0.0000                      |
|  |  |
| 2025-11-12 | 1.0001                      |
|  |  |
| 2025-11-13 | 1.0001                      |
|  |  |
| 2025-11-14 | 1.0001                      |
|  |  |
| 2025-11-17 | 1.0001                      |
|  |  |
| 2025-11-18 | 1.0001                      |
|  |  |
| 2025-11-19 | 1.0001                      |
|  |  |
| 2025-11-20 | 1.0001                      |
|  |  |
| 2025-11-21 | 1.0001                      |
|  |  |
| 2025-11-24 | 1.0001                      |
|  |  |
| 2025-11-25 | 1.0001                      |
|  |  |
| 2025-11-26 | 1.0001                      |
|  |  |
| 2025-11-28 | 1.0001                      |
|  |  |

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

### Class: Premier Class

- **Minimum Initial Investment:** $250000000.00

- **Net Assets of Class:** $11303796997.84

- **Number of Shares Outstanding:** 11303665503.7500

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 1.0001          |
|  |  |
| 2025-11-04 | 1.0001          |
|  |  |
| 2025-11-05 | 1.0001          |
|  |  |
| 2025-11-06 | 1.0002          |
|  |  |
| 2025-11-07 | 1.0002          |
|  |  |
| 2025-11-10 | 1.0001          |
|  |  |
| 2025-11-11 | 0.0000          |
|  |  |
| 2025-11-12 | 1.0001          |
|  |  |
| 2025-11-13 | 1.0001          |
|  |  |
| 2025-11-14 | 1.0001          |
|  |  |
| 2025-11-17 | 1.0001          |
|  |  |
| 2025-11-18 | 1.0001          |
|  |  |
| 2025-11-19 | 1.0001          |
|  |  |
| 2025-11-20 | 1.0001          |
|  |  |
| 2025-11-21 | 1.0001          |
|  |  |
| 2025-11-24 | 1.0001          |
|  |  |
| 2025-11-25 | 1.0001          |
|  |  |
| 2025-11-26 | 1.0001          |
|  |  |
| 2025-11-28 | 1.0001          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-11-03 | $612099543.79             | $381858785.67           |
| 2025-11-04 | $637436924.29             | $614261248.56           |
| 2025-11-05 | $293421911.44             | $526312406.47           |
| 2025-11-06 | $387490376.06             | $340756835.68           |
| 2025-11-07 | $275398481.91             | $404319207.39           |
| 2025-11-10 | $413499350.16             | $152928596.78           |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $423284999.38             | $531582952.99           |
| 2025-11-13 | $410962550.23             | $353184778.74           |
| 2025-11-14 | $511740439.94             | $651319700.51           |
| 2025-11-17 | $379607423.52             | $284214325.79           |
| 2025-11-18 | $547472536.63             | $291966544.76           |
| 2025-11-19 | $383022031.42             | $178377723.35           |
| 2025-11-20 | $726288381.73             | $816916589.47           |
| 2025-11-21 | $630873912.32             | $245941574.25           |
| 2025-11-24 | $244681688.01             | $235619649.79           |
| 2025-11-25 | $386817925.85             | $237054474.48           |
| 2025-11-26 | $810525643.55             | $347866772.84           |
| 2025-11-28 | $290408034.11             | $271829714.67           |

**Total Gross Subscriptions (Month):** $8365032154.34

**Total Gross Redemptions (Month):** $6866311882.19

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 3.9300%           |
| 2025-11-04 | 3.9200%           |
| 2025-11-05 | 3.9200%           |
| 2025-11-06 | 3.9200%           |
| 2025-11-07 | 3.9100%           |
| 2025-11-10 | 3.9100%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 3.9100%           |
| 2025-11-13 | 3.9000%           |
| 2025-11-14 | 3.9000%           |
| 2025-11-17 | 3.9000%           |
| 2025-11-18 | 3.8900%           |
| 2025-11-19 | 3.8900%           |
| 2025-11-20 | 3.8900%           |
| 2025-11-21 | 3.8900%           |
| 2025-11-24 | 3.8900%           |
| 2025-11-25 | 3.8900%           |
| 2025-11-26 | 3.8800%           |
| 2025-11-28 | 3.8800%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Depository institution or other banking institution |  | 18.0800%         | 0.0000%              |
| Non-financial corporation                           |  | 53.0600%         | 0.0000%              |

### Class: Investment

- **Minimum Initial Investment:** $25000000.00

- **Net Assets of Class:** $192669970.27

- **Number of Shares Outstanding:** 192665787.9400

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 1.0001          |
|  |  |
| 2025-11-04 | 1.0002          |
|  |  |
| 2025-11-05 | 1.0001          |
|  |  |
| 2025-11-06 | 1.0002          |
|  |  |
| 2025-11-07 | 1.0002          |
|  |  |
| 2025-11-10 | 1.0001          |
|  |  |
| 2025-11-11 | 0.0000          |
|  |  |
| 2025-11-12 | 1.0001          |
|  |  |
| 2025-11-13 | 1.0001          |
|  |  |
| 2025-11-14 | 1.0001          |
|  |  |
| 2025-11-17 | 1.0001          |
|  |  |
| 2025-11-18 | 1.0001          |
|  |  |
| 2025-11-19 | 1.0001          |
|  |  |
| 2025-11-20 | 1.0001          |
|  |  |
| 2025-11-21 | 1.0002          |
|  |  |
| 2025-11-24 | 1.0001          |
|  |  |
| 2025-11-25 | 1.0002          |
|  |  |
| 2025-11-26 | 1.0001          |
|  |  |
| 2025-11-28 | 1.0001          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-11-03 | $385570.80                | $3951387.89             |
| 2025-11-04 | $48954163.11              | $389918.75              |
| 2025-11-05 | $856087.44                | $0.00                   |
| 2025-11-06 | $0.00                     | $578782.32              |
| 2025-11-07 | $435860.83                | $0.00                   |
| 2025-11-10 | $198944.55                | $188040.04              |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $50.46                    | $69430.84               |
| 2025-11-13 | $30654.57                 | $334130.12              |
| 2025-11-14 | $106832.47                | $0.00                   |
| 2025-11-17 | $1820748.92               | $0.00                   |
| 2025-11-18 | $192751.73                | $0.00                   |
| 2025-11-19 | $0.00                     | $1033911.57             |
| 2025-11-20 | $5886993.97               | $1188203.25             |
| 2025-11-21 | $136055.65                | $270342.28              |
| 2025-11-24 | $399818.31                | $1765404.59             |
| 2025-11-25 | $0.00                     | $48061201.48            |
| 2025-11-26 | $1936392.50               | $58762.23               |
| 2025-11-28 | $2550506.22               | $0.00                   |

**Total Gross Subscriptions (Month):** $63891431.53

**Total Gross Redemptions (Month):** $57889515.36

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 3.5800%           |
| 2025-11-04 | 3.5700%           |
| 2025-11-05 | 3.5700%           |
| 2025-11-06 | 3.5700%           |
| 2025-11-07 | 3.5600%           |
| 2025-11-10 | 3.5600%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 3.5600%           |
| 2025-11-13 | 3.5600%           |
| 2025-11-14 | 3.5500%           |
| 2025-11-17 | 3.5500%           |
| 2025-11-18 | 3.5400%           |
| 2025-11-19 | 3.5400%           |
| 2025-11-20 | 3.5400%           |
| 2025-11-21 | 3.5400%           |
| 2025-11-24 | 3.5400%           |
| 2025-11-25 | 3.5400%           |
| 2025-11-26 | 3.5300%           |
| 2025-11-28 | 3.5300%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Depository institution or other banking institution |  | 85.7400%         | 0.0000%              |
| Depository institution or other banking institution |  | 12.6100%         | 0.0000%              |

### Class: Administration Class

- **Minimum Initial Investment:** $50000.00

- **Net Assets of Class:** $575627075.25

- **Number of Shares Outstanding:** 575620438.1600

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 1.0001          |
|  |  |
| 2025-11-04 | 1.0001          |
|  |  |
| 2025-11-05 | 1.0001          |
|  |  |
| 2025-11-06 | 1.0002          |
|  |  |
| 2025-11-07 | 1.0002          |
|  |  |
| 2025-11-10 | 1.0001          |
|  |  |
| 2025-11-11 | 0.0000          |
|  |  |
| 2025-11-12 | 1.0001          |
|  |  |
| 2025-11-13 | 1.0001          |
|  |  |
| 2025-11-14 | 1.0001          |
|  |  |
| 2025-11-17 | 1.0001          |
|  |  |
| 2025-11-18 | 1.0001          |
|  |  |
| 2025-11-19 | 1.0001          |
|  |  |
| 2025-11-20 | 1.0001          |
|  |  |
| 2025-11-21 | 1.0001          |
|  |  |
| 2025-11-24 | 1.0001          |
|  |  |
| 2025-11-25 | 1.0001          |
|  |  |
| 2025-11-26 | 1.0001          |
|  |  |
| 2025-11-28 | 1.0001          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-11-03 | $1815382.65               | $0.00                   |
| 2025-11-04 | $0.00                     | $0.00                   |
| 2025-11-05 | $3613055.56               | $0.00                   |
| 2025-11-06 | $0.00                     | $0.07                   |
| 2025-11-07 | $0.00                     | $3.72                   |
| 2025-11-10 | $0.00                     | $0.00                   |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $212471.10                | $0.00                   |
| 2025-11-13 | $0.00                     | $590950.20              |
| 2025-11-14 | $0.00                     | $0.00                   |
| 2025-11-17 | $0.00                     | $0.00                   |
| 2025-11-18 | $0.00                     | $0.00                   |
| 2025-11-19 | $0.00                     | $0.00                   |
| 2025-11-20 | $309068.74                | $0.00                   |
| 2025-11-21 | $0.00                     | $294837.12              |
| 2025-11-24 | $0.00                     | $0.00                   |
| 2025-11-25 | $0.00                     | $1790159.10             |
| 2025-11-26 | $0.00                     | $0.00                   |
| 2025-11-28 | $0.00                     | $0.00                   |

**Total Gross Subscriptions (Month):** $5949978.05

**Total Gross Redemptions (Month):** $2675950.21

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 3.6800%           |
| 2025-11-04 | 3.6700%           |
| 2025-11-05 | 3.6700%           |
| 2025-11-06 | 3.6700%           |
| 2025-11-07 | 3.6600%           |
| 2025-11-10 | 3.6600%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 3.6600%           |
| 2025-11-13 | 3.6600%           |
| 2025-11-14 | 3.6500%           |
| 2025-11-17 | 3.6500%           |
| 2025-11-18 | 3.6400%           |
| 2025-11-19 | 3.6400%           |
| 2025-11-20 | 3.6400%           |
| 2025-11-21 | 3.6400%           |
| 2025-11-24 | 3.6400%           |
| 2025-11-25 | 3.6400%           |
| 2025-11-26 | 3.6300%           |
| 2025-11-28 | 3.6300%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Depository institution or other banking institution |  | 97.7200%         | 0.0000%              |

### Class: Institutional Class

- **Minimum Initial Investment:** $50000.00

- **Net Assets of Class:** $2042910962.63

- **Number of Shares Outstanding:** 2042889585.9500

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 1.0001          |
|  |  |
| 2025-11-04 | 1.0001          |
|  |  |
| 2025-11-05 | 1.0001          |
|  |  |
| 2025-11-06 | 1.0002          |
|  |  |
| 2025-11-07 | 1.0002          |
|  |  |
| 2025-11-10 | 1.0001          |
|  |  |
| 2025-11-11 | 0.0000          |
|  |  |
| 2025-11-12 | 1.0001          |
|  |  |
| 2025-11-13 | 1.0001          |
|  |  |
| 2025-11-14 | 1.0001          |
|  |  |
| 2025-11-17 | 1.0001          |
|  |  |
| 2025-11-18 | 1.0001          |
|  |  |
| 2025-11-19 | 1.0001          |
|  |  |
| 2025-11-20 | 1.0001          |
|  |  |
| 2025-11-21 | 1.0001          |
|  |  |
| 2025-11-24 | 1.0001          |
|  |  |
| 2025-11-25 | 1.0001          |
|  |  |
| 2025-11-26 | 1.0001          |
|  |  |
| 2025-11-28 | 1.0001          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-11-03 | $5081576.65               | $1656524.13             |
| 2025-11-04 | $4343403.43               | $11818889.14            |
| 2025-11-05 | $33501771.29              | $7507662.47             |
| 2025-11-06 | $101771053.09             | $88225828.07            |
| 2025-11-07 | $1193000.00               | $5403108.88             |
| 2025-11-10 | $3338070.40               | $31290100.44            |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $138891893.55             | $19643156.29            |
| 2025-11-13 | $31688111.87              | $108675000.00           |
| 2025-11-14 | $182201843.08             | $2542774.42             |
| 2025-11-17 | $42549269.29              | $4120209.04             |
| 2025-11-18 | $26637213.06              | $40000.00               |
| 2025-11-19 | $3095700.58               | $27340000.00            |
| 2025-11-20 | $102319479.33             | $7075874.12             |
| 2025-11-21 | $62277229.32              | $107440.25              |
| 2025-11-24 | $3317379.75               | $317547395.66           |
| 2025-11-25 | $61408000.00              | $85784236.65            |
| 2025-11-26 | $147466223.79             | $39461108.43            |
| 2025-11-28 | $23583681.77              | $21354257.60            |

**Total Gross Subscriptions (Month):** $974664900.25

**Total Gross Redemptions (Month):** $779593565.59

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 3.9000%           |
| 2025-11-04 | 3.8900%           |
| 2025-11-05 | 3.8900%           |
| 2025-11-06 | 3.8900%           |
| 2025-11-07 | 3.8800%           |
| 2025-11-10 | 3.8800%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 3.8800%           |
| 2025-11-13 | 3.8800%           |
| 2025-11-14 | 3.8700%           |
| 2025-11-17 | 3.8700%           |
| 2025-11-18 | 3.8600%           |
| 2025-11-19 | 3.8600%           |
| 2025-11-20 | 3.8600%           |
| 2025-11-21 | 3.8600%           |
| 2025-11-24 | 3.8600%           |
| 2025-11-25 | 3.8600%           |
| 2025-11-26 | 3.8500%           |
| 2025-11-28 | 3.8500%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Non-financial corporation                           |  | 5.2000%          | 0.0000%              |
| Depository institution or other banking institution |  | 49.5300%         | 0.0000%              |
| Depository institution or other banking institution |  | 33.0900%         | 0.0000%              |
| Broker-dealer                                       |  | 6.6900%          | 0.0000%              |

### Class: Investor Class

- **Minimum Initial Investment:** $10000000.00

- **Net Assets of Class:** $266896810.07

- **Number of Shares Outstanding:** 266890322.9400

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 1.0001          |
|  |  |
| 2025-11-04 | 1.0002          |
|  |  |
| 2025-11-05 | 1.0001          |
|  |  |
| 2025-11-06 | 1.0002          |
|  |  |
| 2025-11-07 | 1.0002          |
|  |  |
| 2025-11-10 | 1.0001          |
|  |  |
| 2025-11-11 | 0.0000          |
|  |  |
| 2025-11-12 | 1.0001          |
|  |  |
| 2025-11-13 | 1.0001          |
|  |  |
| 2025-11-14 | 1.0001          |
|  |  |
| 2025-11-17 | 1.0001          |
|  |  |
| 2025-11-18 | 1.0001          |
|  |  |
| 2025-11-19 | 1.0001          |
|  |  |
| 2025-11-20 | 1.0001          |
|  |  |
| 2025-11-21 | 1.0002          |
|  |  |
| 2025-11-24 | 1.0001          |
|  |  |
| 2025-11-25 | 1.0002          |
|  |  |
| 2025-11-26 | 1.0001          |
|  |  |
| 2025-11-28 | 1.0001          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-11-03 | $86585843.71              | $21086265.04            |
| 2025-11-04 | $2870820.22               | $2921316.31             |
| 2025-11-05 | $66341131.41              | $508442.99              |
| 2025-11-06 | $4159761.06               | $4453343.47             |
| 2025-11-07 | $86784024.00              | $83099361.31            |
| 2025-11-10 | $73850501.37              | $61105275.53            |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $3378499.95               | $19365018.53            |
| 2025-11-13 | $56165907.25              | $54672616.66            |
| 2025-11-14 | $113748015.41             | $169333157.34           |
| 2025-11-17 | $13893444.90              | $158417451.64           |
| 2025-11-18 | $3137897.32               | $10867464.13            |
| 2025-11-19 | $1620368.58               | $1887737.93             |
| 2025-11-20 | $2344712.96               | $17171676.44            |
| 2025-11-21 | $10207357.28              | $5014190.53             |
| 2025-11-24 | $225108.32                | $5139155.62             |
| 2025-11-25 | $4727418.40               | $671872.25              |
| 2025-11-26 | $12086759.78              | $8730087.88             |
| 2025-11-28 | $13513743.44              | $3688961.56             |

**Total Gross Subscriptions (Month):** $555641315.36

**Total Gross Redemptions (Month):** $628133395.16

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 3.8500%           |
| 2025-11-04 | 3.8400%           |
| 2025-11-05 | 3.8400%           |
| 2025-11-06 | 3.8400%           |
| 2025-11-07 | 3.8300%           |
| 2025-11-10 | 3.8300%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 3.8300%           |
| 2025-11-13 | 3.8200%           |
| 2025-11-14 | 3.8200%           |
| 2025-11-17 | 3.8200%           |
| 2025-11-18 | 3.8100%           |
| 2025-11-19 | 3.8100%           |
| 2025-11-20 | 3.8100%           |
| 2025-11-21 | 3.8100%           |
| 2025-11-24 | 3.8100%           |
| 2025-11-25 | 3.8100%           |
| 2025-11-26 | 3.8000%           |
| 2025-11-28 | 3.8000%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Non-financial corporation                           |  | 7.6900%          | 0.0000%              |
| Depository institution or other banking institution |  | 18.0400%         | 0.0000%              |
| Non-financial corporation                           |  | 74.2600%         | 0.0000%              |

### Class: Bancroft Capital Class

- **Minimum Initial Investment:** $25000000.00

- **Net Assets of Class:** $50017.28

- **Number of Shares Outstanding:** 50000.0000

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 1.0005          |
|  |  |
| 2025-11-04 | 1.0005          |
|  |  |
| 2025-11-05 | 1.0005          |
|  |  |
| 2025-11-06 | 1.0005          |
|  |  |
| 2025-11-07 | 1.0005          |
|  |  |
| 2025-11-10 | 1.0004          |
|  |  |
| 2025-11-11 | 0.0000          |
|  |  |
| 2025-11-12 | 1.0005          |
|  |  |
| 2025-11-13 | 1.0004          |
|  |  |
| 2025-11-14 | 1.0004          |
|  |  |
| 2025-11-17 | 1.0004          |
|  |  |
| 2025-11-18 | 1.0005          |
|  |  |
| 2025-11-19 | 1.0004          |
|  |  |
| 2025-11-20 | 1.0004          |
|  |  |
| 2025-11-21 | 1.0005          |
|  |  |
| 2025-11-24 | 1.0005          |
|  |  |
| 2025-11-25 | 1.0005          |
|  |  |
| 2025-11-26 | 1.0004          |
|  |  |
| 2025-11-28 | 1.0005          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-11-03 | $0.00                     | $0.00                   |
| 2025-11-04 | $0.00                     | $0.00                   |
| 2025-11-05 | $0.00                     | $0.00                   |
| 2025-11-06 | $0.00                     | $0.00                   |
| 2025-11-07 | $0.00                     | $0.00                   |
| 2025-11-10 | $0.00                     | $0.00                   |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $0.00                     | $0.00                   |
| 2025-11-13 | $0.00                     | $0.00                   |
| 2025-11-14 | $0.00                     | $0.00                   |
| 2025-11-17 | $0.00                     | $0.00                   |
| 2025-11-18 | $0.00                     | $0.00                   |
| 2025-11-19 | $0.00                     | $0.00                   |
| 2025-11-20 | $0.00                     | $0.00                   |
| 2025-11-21 | $0.00                     | $0.00                   |
| 2025-11-24 | $0.00                     | $0.00                   |
| 2025-11-25 | $0.00                     | $0.00                   |
| 2025-11-26 | $0.00                     | $0.00                   |
| 2025-11-28 | $0.00                     | $0.00                   |

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

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

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 3.9000%           |
| 2025-11-04 | 3.9000%           |
| 2025-11-05 | 3.9000%           |
| 2025-11-06 | 3.8900%           |
| 2025-11-07 | 3.8900%           |
| 2025-11-10 | 3.8900%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 3.8800%           |
| 2025-11-13 | 3.8800%           |
| 2025-11-14 | 3.8800%           |
| 2025-11-17 | 3.8700%           |
| 2025-11-18 | 3.8700%           |
| 2025-11-19 | 3.8700%           |
| 2025-11-20 | 3.8700%           |
| 2025-11-21 | 3.8700%           |
| 2025-11-24 | 3.8600%           |
| 2025-11-25 | 3.8600%           |
| 2025-11-26 | 3.8600%           |
| 2025-11-28 | 3.8500%           |

**Beneficial/Record Owner Categories**
| Category                  | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Non-financial corporation |  | 100.0000%        | 0.0000%              |

### Class: Cabrera Capital Markets Class

- **Minimum Initial Investment:** $25000000.00

- **Net Assets of Class:** $58008.60

- **Number of Shares Outstanding:** 57979.0500

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 1.0006          |
|  |  |
| 2025-11-04 | 1.0006          |
|  |  |
| 2025-11-05 | 1.0006          |
|  |  |
| 2025-11-06 | 1.0007          |
|  |  |
| 2025-11-07 | 1.0007          |
|  |  |
| 2025-11-10 | 1.0006          |
|  |  |
| 2025-11-11 | 0.0000          |
|  |  |
| 2025-11-12 | 1.0006          |
|  |  |
| 2025-11-13 | 1.0006          |
|  |  |
| 2025-11-14 | 1.0006          |
|  |  |
| 2025-11-17 | 1.0006          |
|  |  |
| 2025-11-18 | 1.0006          |
|  |  |
| 2025-11-19 | 1.0006          |
|  |  |
| 2025-11-20 | 1.0006          |
|  |  |
| 2025-11-21 | 1.0006          |
|  |  |
| 2025-11-24 | 1.0006          |
|  |  |
| 2025-11-25 | 1.0006          |
|  |  |
| 2025-11-26 | 1.0006          |
|  |  |
| 2025-11-28 | 1.0006          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-11-03 | $194.80                   | $0.00                   |
| 2025-11-04 | $0.00                     | $0.00                   |
| 2025-11-05 | $0.00                     | $0.00                   |
| 2025-11-06 | $0.00                     | $0.00                   |
| 2025-11-07 | $0.00                     | $0.00                   |
| 2025-11-10 | $0.00                     | $0.00                   |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $0.00                     | $0.00                   |
| 2025-11-13 | $0.00                     | $0.00                   |
| 2025-11-14 | $0.00                     | $0.00                   |
| 2025-11-17 | $0.00                     | $0.00                   |
| 2025-11-18 | $0.00                     | $0.00                   |
| 2025-11-19 | $0.00                     | $0.00                   |
| 2025-11-20 | $0.00                     | $0.00                   |
| 2025-11-21 | $0.00                     | $0.00                   |
| 2025-11-24 | $0.00                     | $0.00                   |
| 2025-11-25 | $0.00                     | $0.00                   |
| 2025-11-26 | $0.00                     | $0.00                   |
| 2025-11-28 | $0.00                     | $0.00                   |

**Total Gross Subscriptions (Month):** $194.80

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

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 3.9000%           |
| 2025-11-04 | 3.9000%           |
| 2025-11-05 | 3.8900%           |
| 2025-11-06 | 3.8900%           |
| 2025-11-07 | 3.8900%           |
| 2025-11-10 | 3.8800%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 3.8800%           |
| 2025-11-13 | 3.8800%           |
| 2025-11-14 | 3.8700%           |
| 2025-11-17 | 3.8700%           |
| 2025-11-18 | 3.8700%           |
| 2025-11-19 | 3.8700%           |
| 2025-11-20 | 3.8600%           |
| 2025-11-21 | 3.8600%           |
| 2025-11-24 | 3.8600%           |
| 2025-11-25 | 3.8600%           |
| 2025-11-26 | 3.8600%           |
| 2025-11-28 | 3.8500%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Depository institution or other banking institution |  | 99.9900%         | 0.0000%              |

### Class: Blaylock Van Class

- **Minimum Initial Investment:** $25000000.00

- **Net Assets of Class:** $0.00

- **Number of Shares Outstanding:** 0.0000

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 0.0000          |
|  |  |
| 2025-11-04 | 0.0000          |
|  |  |
| 2025-11-05 | 0.0000          |
|  |  |
| 2025-11-06 | 0.0000          |
|  |  |
| 2025-11-07 | 0.0000          |
|  |  |
| 2025-11-10 | 0.0000          |
|  |  |
| 2025-11-11 | 0.0000          |
|  |  |
| 2025-11-12 | 0.0000          |
|  |  |
| 2025-11-13 | 0.0000          |
|  |  |
| 2025-11-14 | 0.0000          |
|  |  |
| 2025-11-17 | 0.0000          |
|  |  |
| 2025-11-18 | 0.0000          |
|  |  |
| 2025-11-19 | 0.0000          |
|  |  |
| 2025-11-20 | 0.0000          |
|  |  |
| 2025-11-21 | 0.0000          |
|  |  |
| 2025-11-24 | 0.0000          |
|  |  |
| 2025-11-25 | 0.0000          |
|  |  |
| 2025-11-26 | 0.0000          |
|  |  |
| 2025-11-28 | 0.0000          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-11-03 | $0.00                     | $0.00                   |
| 2025-11-04 | $0.00                     | $0.00                   |
| 2025-11-05 | $0.00                     | $0.00                   |
| 2025-11-06 | $0.00                     | $0.00                   |
| 2025-11-07 | $0.00                     | $0.00                   |
| 2025-11-10 | $0.00                     | $0.00                   |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $0.00                     | $0.00                   |
| 2025-11-13 | $0.00                     | $0.00                   |
| 2025-11-14 | $0.00                     | $0.00                   |
| 2025-11-17 | $0.00                     | $0.00                   |
| 2025-11-18 | $0.00                     | $0.00                   |
| 2025-11-19 | $0.00                     | $0.00                   |
| 2025-11-20 | $0.00                     | $0.00                   |
| 2025-11-21 | $0.00                     | $0.00                   |
| 2025-11-24 | $0.00                     | $0.00                   |
| 2025-11-25 | $0.00                     | $0.00                   |
| 2025-11-26 | $0.00                     | $0.00                   |
| 2025-11-28 | $0.00                     | $0.00                   |

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

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

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 0.0000%           |
| 2025-11-04 | 0.0000%           |
| 2025-11-05 | 0.0000%           |
| 2025-11-06 | 0.0000%           |
| 2025-11-07 | 0.0000%           |
| 2025-11-10 | 0.0000%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 0.0000%           |
| 2025-11-13 | 0.0000%           |
| 2025-11-14 | 0.0000%           |
| 2025-11-17 | 0.0000%           |
| 2025-11-18 | 0.0000%           |
| 2025-11-19 | 0.0000%           |
| 2025-11-20 | 0.0000%           |
| 2025-11-21 | 0.0000%           |
| 2025-11-24 | 0.0000%           |
| 2025-11-25 | 0.0000%           |
| 2025-11-26 | 0.0000%           |
| 2025-11-28 | 0.0000%           |

### Class: Opportunity Class

- **Minimum Initial Investment:** $25000000.00

- **Net Assets of Class:** $90141436.91

- **Number of Shares Outstanding:** 90138850.8900

**Daily Net Asset Value per Share (Class)**
| Date       | NAV per Share   |
|:---|:---|
| 2025-11-03 | 1.0001          |
|  |  |
| 2025-11-04 | 1.0002          |
|  |  |
| 2025-11-05 | 1.0001          |
|  |  |
| 2025-11-06 | 1.0002          |
|  |  |
| 2025-11-07 | 1.0002          |
|  |  |
| 2025-11-10 | 1.0001          |
|  |  |
| 2025-11-11 | 0.0000          |
|  |  |
| 2025-11-12 | 1.0001          |
|  |  |
| 2025-11-13 | 1.0001          |
|  |  |
| 2025-11-14 | 1.0001          |
|  |  |
| 2025-11-17 | 1.0001          |
|  |  |
| 2025-11-18 | 1.0001          |
|  |  |
| 2025-11-19 | 1.0001          |
|  |  |
| 2025-11-20 | 1.0001          |
|  |  |
| 2025-11-21 | 1.0002          |
|  |  |
| 2025-11-24 | 1.0001          |
|  |  |
| 2025-11-25 | 1.0002          |
|  |  |
| 2025-11-26 | 1.0001          |
|  |  |
| 2025-11-28 | 1.0001          |
|  |  |

**Daily Shareholder Flows**
| Date       | Gross Subscriptions ($)   | Gross Redemptions ($)   |
|:---|:---|:---|
| 2025-11-03 | $234681.85                | $131869.03              |
| 2025-11-04 | $0.00                     | $0.00                   |
| 2025-11-05 | $24000000.00              | $0.00                   |
| 2025-11-06 | $0.00                     | $0.00                   |
| 2025-11-07 | $1000000.00               | $0.00                   |
| 2025-11-10 | $15500000.00              | $10000000.00            |
| 2025-11-11 | $0.00                     | $0.00                   |
| 2025-11-12 | $0.00                     | $0.00                   |
| 2025-11-13 | $0.00                     | $0.00                   |
| 2025-11-14 | $240000.00                | $5500000.00             |
| 2025-11-17 | $0.00                     | $0.00                   |
| 2025-11-18 | $0.00                     | $30000000.00            |
| 2025-11-19 | $10000000.00              | $0.00                   |
| 2025-11-20 | $9000000.00               | $0.00                   |
| 2025-11-21 | $0.00                     | $9000000.00             |
| 2025-11-24 | $0.00                     | $0.00                   |
| 2025-11-25 | $6000000.00               | $0.00                   |
| 2025-11-26 | $0.00                     | $0.00                   |
| 2025-11-28 | $0.00                     | $0.00                   |

**Total Gross Subscriptions (Month):** $65974681.85

**Total Gross Redemptions (Month):** $54631869.03

**7-Day Net Yield (Class)**
| Date       | 7-Day Net Yield   |
|:---|:---|
| 2025-11-03 | 3.9000%           |
| 2025-11-04 | 3.8900%           |
| 2025-11-05 | 3.8900%           |
| 2025-11-06 | 3.8900%           |
| 2025-11-07 | 3.8800%           |
| 2025-11-10 | 3.8800%           |
| 2025-11-11 | 0.0000%           |
| 2025-11-12 | 3.8800%           |
| 2025-11-13 | 3.8700%           |
| 2025-11-14 | 3.8700%           |
| 2025-11-17 | 3.8700%           |
| 2025-11-18 | 3.8600%           |
| 2025-11-19 | 3.8600%           |
| 2025-11-20 | 3.8600%           |
| 2025-11-21 | 3.8600%           |
| 2025-11-24 | 3.8600%           |
| 2025-11-25 | 3.8600%           |
| 2025-11-26 | 3.8500%           |
| 2025-11-28 | 3.8500%           |

**Beneficial/Record Owner Categories**
| Category                                            | Other Category   | Record Owner %   | Beneficial Owner %   |
|:---|:---|:---|:---|
| Depository institution or other banking institution |  | 13.6300%         | 0.0000%              |
| Depository institution or other banking institution |  | 86.3100%         | 0.0000%              |

## Part C: Schedule of Portfolio Securities

### Security 1: State Street Treasury Money Market Portfolio

- **C.1 - Title:** State Street Treasury Money Market Portfolio
- **C.6 - Investment Category:** Investment Company
- **Identifiers:** C.3 - CUSIP: FSSgAK171, C.3 - LEI: N/A, C.5 - Other ID: FSSgAK171
- **C.18 - Value (incl. sponsor support):** $14515718196.75
- **C.18.a - Value (excl. sponsor support):** $14515718196.75
- **C.19 - Percentage of Net Assets:** 100.0000%
- **C.17 - Yield as of Reporting Date:** 0.0000%
- **C.11 - Maturity Date (WAM):** 2025-12-01
- **C.12 - Maturity Date (WAL):** 2025-12-01
- **C.13 - Final Legal Maturity Date:** 2025-12-01
- **Characteristics:** C.9 Eligible Security? Yes, C.14 Has Demand Feature? No, C.15 Has Guarantee? No, C.16 Has Enhancement? No, C.22 Is an Illiquid Security? No, C.20 Is a Daily Liquid Asset? Yes, C.21 Is a Weekly Liquid Asset? Yes, C.23 Categorized at Level 3? No

## N-MFP: Signatures

**Registrant:** STATE STREET INSTITUTIONAL INVESTMENT TRUST

**Date:** 2025-12-05

**By:** /s/ Chad Hallett

**Name of Signing Officer:** Chad Hallett

**Title of Signing Officer:** Deputy Treasurer