# EDGAR Filing Document

**Accession Number:** 0000076721
**File Stem:** 0002071691-26-010460
**Filing Date:** 2026-5
**Character Count:** 7681
**Document Hash:** 7eef3ec117f709aaf3b1ed3772e97a0d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0002071691-26-010460.hdr.sgml**: 20260520

**ACCESSION NUMBER**: 0002071691-26-010460

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260331

**FILED AS OF DATE**: 20260520

**DATE AS OF CHANGE**: 20260520

**PERIOD START**: 20261231

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** IMPAX FUNDS SERIES TRUST I
- **CENTRAL INDEX KEY:** 0000076721

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-02064
- **FILM NUMBER:** 261003683

**BUSINESS ADDRESS:**
- **STREET 1:** 30 PENHALLOW STREET, SUITE 400
- **CITY:** PORTSMOUTH
- **STATE:** NH
- **ZIP:** 03801-3852
- **BUSINESS PHONE:** 800-767-1729

**MAIL ADDRESS:**
- **STREET 1:** 30 PENHALLOW STREET, SUITE 400
- **CITY:** PORTSMOUTH
- **STATE:** NH
- **ZIP:** 03801-3852

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PAX WORLD FUNDS SERIES TRUST I
- **DATE OF NAME CHANGE:** 20070831

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PAX WORLD BALANCED FUND
- **DATE OF NAME CHANGE:** 20061113

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PAX WORLD BALANCED FUND INC
- **DATE OF NAME CHANGE:** 20040624

## Series and Classes Contracts Data

### Impax Sustainable Allocation Fund (Series ID: S000011971)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000043250 | Investor Class      | PAXWX           |
| C000043251 | Institutional Class | PAXIX           |

## Form NPORT-P: Monthly Portfolio Investments Report

### NPORT-P: Part A: General Information

**Item A.1. Information about the Registrant.**

- **a. Name of Registrant:** IMPAX FUNDS SERIES TRUST I

- **b. Investment Company Act file number:** 811-02064

- **c. CIK number of Registrant:** 0000076721

- **d. LEI of Registrant:** 549300TD5R23SWU72456

- **e. Address and telephone number of Registrant.**

  - **Street Address 1:** 30 Penhallow St., Suite 100

  - **City:** Portsmouth

  - **State:** NH

  - **Foreign country:** US

  - **Zip / Postal Code:** 03801

  - **Telephone number:** 603-431-8022

**Item A.2. Information about the Series.**

- **a. Name of Series:** Impax Sustainable Allocation Fund

- **b. EDGAR series identifier (if any):** S000011971

- **c. LEI of Series:** 5493005QNFIONEGYS209

**Item A.3. Reporting period.**

- **a. Date of fiscal year-end:** 2026-12-31

- **b. Date as of which information is reported:** 2026-03-31

**Item A.4. Final filing**

Does the Fund anticipate that this will be its final filing on Form N-PORT? **No**

### Fund Information

**Total Assets:** $2274301276.01

**Total Liabilities:** $368092.80

**Net Assets:** $2273933183.21

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000043251 | 0.63%                | 0.37%                | -4.10%               |
| Class ID C000043250 | 0.61%                | 0.38%                | -4.14%               |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $0.00                    | $12324308.65                               |
| Month 2  | $23203253.13             | $-16971069.75                              |
| Month 3  | $0.00                    | $-101373870.31                             |

### Schedule of Portfolio Investments

| Name                                          | Title                                                             | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Impax Small Cap Fund                          | Impax Small Cap Fund, Class Institutional                         | CUSIP: 704223817<br>LEI: 549300GOOKRMB3XGNR17 | Long             |  | RF                | US        |   6410734 | NS      | $117508751.09 | 5.17%             |  |  |  | No            |                  1 | On Loan: No      |
| Impax International Sustainable Economy Fund  | Impax International Sustainable Economy Fund, Class Institutional | CUSIP: 704223742<br>LEI: 5493001G1B6NH621FW86 | Long             |  | RF                | US        |  11981588 | NS      | $145097029.81 | 6.38%             |  |  |  | No            |                  1 | On Loan: No      |
| JPMorgan U.S. Treasury Plus Money Market Fund | JPMorgan U.S. Treasury Plus Money Market Fund, Class IM           | CUSIP: 4812C2262<br>LEI: 549300WIC5LVF25Z1127 | Long             | STIV             | RF                | US        |  92770661 | NS      | $92770661.23  | 4.08%             |  |  |  | No            |                  1 | On Loan: No      |
| Impax Core Bond Fund                          | Impax Core Bond Fund, Class Institutional                         | CUSIP: 704223460<br>LEI: 549300Z901FIZVY05W78 | Long             |  | RF                | US        |  84298609 | NS      | $743513732.16 | 32.70%            |  |  |  | No            |                  1 | On Loan: No      |
| Impax Global Opportunities Fund               | Impax Global Opportunities Fund, Class Institutional              | CUSIP: 704223429<br>LEI: 5493008PKSO3C54ZXR37 | Long             |  | RF                | US        |   2854225 | NS      | $44725713.10  | 1.97%             |  |  |  | No            |                  1 | On Loan: No      |
| Impax High Yield Bond Fund                    | Impax High Yield Bond Fund, Class Institutional                   | CUSIP: 704223809<br>LEI: 549300XS1BN61UNERX35 | Long             |  | RF                | US        |  19575247 | NS      | $118038737.88 | 5.19%             |  |  |  | No            |                  1 | On Loan: No      |
| Impax Global Environmental Markets Fund       | Impax Global Environmental Markets Fund, Class Institutional      | CUSIP: 704223775<br>LEI: 5493004WSDJ280SE8M13 | Long             |  | RF                | US        |   2145175 | NS      | $44683992.33  | 1.97%             |  |  |  | No            |                  1 | On Loan: No      |
| Impax Global Infrastructure ETF               | Impax Global Infrastructure ETF                                   | CUSIP: 704223387<br>LEI: 529900IDZS1Q7NSUI796 | Long             |  | RF                | US        |   2755857 | NS      | $70675330.69  | 3.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Impax US Sustainable Economy Fund             | Impax US Sustainable Economy Fund, Class Institutional            | CUSIP: 704223502<br>LEI: 5493001FQOFD3O7VGQ38 | Long             |  | RF                | US        |  17309365 | NS      | $446062333.50 | 19.62%            |  |  |  | No            |                  1 | On Loan: No      |
| Impax Large Cap Fund                          | Impax Large Cap Fund, Class Institutional                         | CUSIP: 704223486<br>LEI: 549300NZ5W3SP8MQMW39 | Long             |  | RF                | US        |  44006438 | NS      | $448425602.78 | 19.72%            |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-04-30

**Name of Applicant:** IMPAX FUNDS SERIES TRUST I

**Signature:** Daniel Saltus

**Name of Signer:** Daniel Saltus

**Title:** Treasurer