# EDGAR Filing Document

**Accession Number:** 0000356682
**File Stem:** 0001752724-25-207504
**Filing Date:** 2025-8
**Character Count:** 30806
**Document Hash:** cb089932ed21c892d5326c40248cf361
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-25-207504.hdr.sgml**: 20250827

**ACCESSION NUMBER**: 0001752724-25-207504

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20250630

**FILED AS OF DATE**: 20250827

**DATE AS OF CHANGE**: 20250827

**PERIOD START**: 20250930

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Calvert Social Investment Fund
- **CENTRAL INDEX KEY:** 0000356682

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-03334
- **FILM NUMBER:** 251261536

**BUSINESS ADDRESS:**
- **STREET 1:** 2050 M STREET NW
- **CITY:** WASHINGTON
- **STATE:** DC
- **ZIP:** 20036
- **BUSINESS PHONE:** 8002256265

**MAIL ADDRESS:**
- **STREET 1:** 2050 M STREET NW
- **CITY:** WASHINGTON
- **STATE:** DC
- **ZIP:** 20036

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** CALVERT SOCIAL INVESTMENT FUND
- **DATE OF NAME CHANGE:** 19920703

## Series and Classes Contracts Data

### Calvert Moderate Allocation Fund (Series ID: S000008722)

| Class ID   | Class Name                                | Ticker Symbol   |
|:---|:---|:---|
| C000023772 | Class A                                   | CMAAX           |
| C000023773 | Class C                                   | CMACX           |
| C000099327 | Class I                                   | CLAIX           |
| C000235279 | Calvert Moderate Allocation Fund Class R6 | CAMRX           |

## Nport-Ex

Calvert

Moderate Allocation Fund

June 30, 2025

Schedule of Investments (Unaudited)

------

Mutual Funds — 98.9%<sup>(1)</sup>

---

| | | |
|:---|:---|:---|
| **Security** | **Shares** | **Value** |
| Equity Funds — 65.7% | Equity Funds — 65.7% |  |
| Calvert Impact Fund, Inc.: |  |  |
| &nbsp;&nbsp;&nbsp;Calvert Small-Cap Fund, Class R6 | &nbsp;&nbsp;&nbsp;&nbsp;266758 | $9645983 |
| Calvert Responsible Index Series, Inc.: |  |  |
| &nbsp;&nbsp;&nbsp;Calvert International Responsible Index Fund, Class R6 | &nbsp;&nbsp;&nbsp;&nbsp;724953 | &nbsp;&nbsp; 25474837 |
| &nbsp;&nbsp;&nbsp;Calvert US Large-Cap Core Responsible Index Fund, Class R6 | &nbsp;&nbsp;978665 | &nbsp;&nbsp; 52123675 |
| &nbsp;&nbsp;&nbsp;Calvert US Large-Cap Growth Responsible Index Fund, Class R6 | &nbsp;&nbsp;433421 | &nbsp;&nbsp; 30499814 |
| &nbsp;&nbsp;&nbsp;Calvert US Large-Cap Value Responsible Index Fund, Class R6 | &nbsp;&nbsp;748118 | &nbsp;&nbsp; 25533268 |
| &nbsp;&nbsp;&nbsp;Calvert US Mid-Cap Core Responsible Index Fund, Class R6 | &nbsp;&nbsp;204246 | &nbsp;&nbsp; 8713151 |
| Calvert Social Investment Fund: |  |  |
| &nbsp;&nbsp;&nbsp;Calvert Equity Fund, Class R6 | &nbsp;&nbsp;197793 | &nbsp;&nbsp;&nbsp;&nbsp;19261089 |
| &nbsp;&nbsp;&nbsp;Calvert Focused Value Fund, Class R6 | 1730032 | &nbsp;&nbsp;&nbsp;&nbsp;20327873 |
| Calvert World Values Fund, Inc.: |  |  |
| &nbsp;&nbsp;&nbsp;Calvert Emerging Markets Advancement Fund, Class I | 1226058 | &nbsp;&nbsp;&nbsp;&nbsp;16674389 |
| &nbsp;&nbsp;&nbsp;Calvert Emerging Markets Equity Fund, Class R6 | &nbsp;&nbsp;389436 | &nbsp;&nbsp;&nbsp;&nbsp;7827659 |
| &nbsp;&nbsp;&nbsp;Calvert International Equity Fund, Class R6 | &nbsp;&nbsp;859943 | &nbsp;&nbsp;&nbsp;&nbsp;23304461 |
| &nbsp;&nbsp;&nbsp;Calvert International Opportunities Fund, Class R6 | &nbsp;&nbsp;574586 | &nbsp;&nbsp;&nbsp;&nbsp;10716032 |
| &nbsp;&nbsp;&nbsp;Calvert Mid-Cap Fund, Class I | &nbsp;&nbsp;&nbsp;&nbsp;82616 | &nbsp;&nbsp;&nbsp;&nbsp;3816051 |
|  |  | **$253918282** |
| Income Funds — 33.2% | Income Funds — 33.2% |  |
| Calvert Management Series: |  |  |
| &nbsp;&nbsp;&nbsp;Calvert Flexible Bond Fund, Class R6 | &nbsp;&nbsp;773956 | &nbsp;&nbsp;$11462288 |
| &nbsp;&nbsp;&nbsp;Calvert Floating-Rate Advantage Fund, Class R6 | &nbsp;&nbsp;873736 | &nbsp;&nbsp;&nbsp;&nbsp;7645190 |
| Calvert Social Investment Fund: |  |  |
| &nbsp;&nbsp;&nbsp;Calvert Bond Fund, Class R6 | 3734121 | &nbsp;&nbsp;&nbsp;&nbsp;54630196 |
| The Calvert Fund: |  |  |
| &nbsp;&nbsp;&nbsp;Calvert Core Bond Fund, Class I | 1573579 | &nbsp;&nbsp;&nbsp;&nbsp;24909758 |
| &nbsp;&nbsp;&nbsp;Calvert High Yield Bond Fund, Class R6 | &nbsp;&nbsp;348180 | &nbsp;&nbsp;&nbsp;&nbsp;8631384 |

---

---

| | | |
|:---|:---|:---|
| **Security** | **Shares** | **Value** |
| Income Funds (continued) | Income Funds (continued) |  |
| The Calvert Fund: (continued) |  |  |
| &nbsp;&nbsp;&nbsp;Calvert Mortgage Access Fund, Class I | 1561512 | $15396503 |
| &nbsp;&nbsp;&nbsp;Calvert Short Duration Income Fund, Class R6 | &nbsp;&nbsp;244501 | &nbsp;&nbsp; 3882680 |
| &nbsp;&nbsp;&nbsp;Calvert Ultra-Short Duration Income Fund, Class R6 | &nbsp;&nbsp;192837 | &nbsp;&nbsp; 1909081 |
|  |  | **$128467080** |
| Total Mutual Funds<br> (identified cost $304,223,790) |  | **$382385362** |

---

Short-Term Investments — 0.9%

---

| | | |
|:---|:---|:---|
| **Security** | **Shares** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Value** |
| Morgan Stanley Institutional Liquidity Funds - Government Portfolio, Institutional Class, 4.23%<sup>(2)</sup> | 3509536 | $3509536 |
| Total Short-Term Investments<br> (identified cost $3,509,536) |  | **$3509536** |
| Total Investments — 99.8%<br> (identified cost $307,733,326) |  | **$385894898** |

---

---

| | |
|:---|:---|
| Other Assets, Less Liabilities — 0.2% | **$765528** |
| Net Assets — 100.0% | **$386660426** |

---

---

| | |
|:---|:---|
| The percentage shown for each investment category in the Schedule of Investments is based on net assets. | The percentage shown for each investment category in the Schedule of Investments is based on net assets. |
| <sup>(1)</sup> | Affiliated fund. |
| <sup>(2)</sup> | May be deemed to be an affiliated investment company. The rate shown is the annualized seven-day yield as of June 30, 2025. |

---

#### Futures Contracts

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **Description** | &nbsp;&nbsp;&nbsp;&nbsp;**Number of<br> Contracts** | &nbsp;&nbsp;&nbsp;&nbsp;**Position** | &nbsp;&nbsp;&nbsp;&nbsp;**Expiration<br> Date** | &nbsp;&nbsp;&nbsp;&nbsp;**Notional<br> Amount** | &nbsp;&nbsp;&nbsp;&nbsp;**Value/<br> Unrealized<br> Appreciation<br> (Depreciation)** |
| **Interest Rate Futures** |  |  |  |  |  |
| U.S. Long Treasury Bond | &nbsp;&nbsp;&nbsp;&nbsp;20 | &nbsp;&nbsp;&nbsp;&nbsp;Long | &nbsp;&nbsp;&nbsp;&nbsp;9/19/25 | &nbsp;&nbsp;&nbsp;&nbsp;$2309375 | &nbsp;&nbsp;&nbsp;&nbsp;$57807 |
| U.S. Ultra-Long Treasury Bond | &nbsp;&nbsp;&nbsp;&nbsp;23 | &nbsp;&nbsp;&nbsp;&nbsp;Long | &nbsp;&nbsp;&nbsp;&nbsp;9/19/25 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2739875 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;70406 |
|  |  |  |  |  | &nbsp;&nbsp;&nbsp;&nbsp;**$128213** |

---

During the fiscal year to date ended June 30, 2025, the Fund used futures contracts to facilitate the periodic rebalancing of its portfolio to maintain its target asset allocation and to make tactical asset allocations.

At June 30, 2025, the Fund had sufficient cash and/or securities to cover commitments under open derivative contracts.

------

Calvert

Moderate Allocation Fund

June 30, 2025

Schedule of Investments (Unaudited) — continued

------

Affiliated Investments

At June 30, 2025, the value of the Fund's investment in affiliated funds, including funds that may be deemed to be affiliated, was $385,894,898, which represents 99.8% of the Fund's net assets. Transactions in such investments by the Fund for the fiscal year to date ended June 30, 2025 were as follows:

---

| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Name of<br> Calvert Fund** | **Value,<br> beginning<br> of period** | **Purchases** | **Sales<br> proceeds** | **Net<br> realized<br> gain<br> (loss)** | **Change in<br> unrealized<br> appreciation<br> (depreciation)** | **Value,<br> end of<br> period** | **Dividend<br> income** | **Capital gains<br> distributions<br> received** | **Shares,<br> end of period** |
| Bond Fund, Class R6 | $36175482 | $27714075 | $(8684777) | $(116705) | $(457879) | $54630196 | $1740783 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$— | 3734121 |
| Core Bond Fund, Class I | &nbsp;&nbsp;&nbsp;16312233 | &nbsp;&nbsp;&nbsp;14555382 | &nbsp;&nbsp;&nbsp; (5659002) | &nbsp;&nbsp;&nbsp;&nbsp; (92156) | &nbsp;&nbsp;&nbsp;&nbsp; (206699) | &nbsp;&nbsp;&nbsp; 24909758 | &nbsp;&nbsp;&nbsp; 677832 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | 1573579 |
| Emerging Markets Advancement Fund, Class I | &nbsp;&nbsp;&nbsp;16246537 | &nbsp;&nbsp;&nbsp; 3376005 | &nbsp;&nbsp;&nbsp; (5001996) | &nbsp;&nbsp;&nbsp; 146779 | &nbsp;&nbsp;&nbsp; 1907064 | &nbsp;&nbsp;&nbsp; 16674389 | &nbsp;&nbsp;&nbsp; 248019 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | 1226058 |
| Emerging Markets Equity Fund, Class R6 | &nbsp;&nbsp;&nbsp; 7474633 | &nbsp;&nbsp;&nbsp; 1231196 | &nbsp;&nbsp;&nbsp; (1474869) | &nbsp;&nbsp;&nbsp; 112870 | &nbsp;&nbsp;&nbsp; 483829 | &nbsp;&nbsp;&nbsp; 7827659 | &nbsp;&nbsp;&nbsp; 42481 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;389436 |
| Equity Fund, Class R6 | &nbsp;&nbsp;&nbsp;20229043 | &nbsp;&nbsp;&nbsp; 1354654 | &nbsp;&nbsp;&nbsp; (1349600) | &nbsp;&nbsp;&nbsp; 14219 | &nbsp;&nbsp;&nbsp;&nbsp; (987227) | &nbsp;&nbsp;&nbsp; 19261089 | &nbsp;&nbsp;&nbsp; 75358 | &nbsp;&nbsp;&nbsp;1279296 | &nbsp;&nbsp;&nbsp;&nbsp;197793 |
| Flexible Bond Fund, Class R6 | &nbsp;&nbsp;&nbsp;12076185 | &nbsp;&nbsp;&nbsp; 949430 | &nbsp;&nbsp;&nbsp; (1534378) | &nbsp;&nbsp;&nbsp;&nbsp; (29284) | &nbsp;&nbsp;&nbsp; 335 | &nbsp;&nbsp;&nbsp; 11462288 | &nbsp;&nbsp;&nbsp; 456217 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;773956 |
| Floating-Rate Advantage Fund, Class R6 | &nbsp;&nbsp;&nbsp;13182736 | &nbsp;&nbsp;&nbsp; 539232 | &nbsp;&nbsp;&nbsp; (5880974) | &nbsp;&nbsp;&nbsp;&nbsp; (528739) | &nbsp;&nbsp;&nbsp; 332935 | &nbsp;&nbsp;&nbsp; 7645190 | &nbsp;&nbsp;&nbsp; 539162 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;873736 |
| Focused Value Fund, Class R6 | &nbsp;&nbsp;&nbsp;21579119 | &nbsp;&nbsp;&nbsp; 1528287 | &nbsp;&nbsp;&nbsp; (2230505) | &nbsp;&nbsp;&nbsp; 266787 | &nbsp;&nbsp;&nbsp;&nbsp; (815815) | &nbsp;&nbsp;&nbsp; 20327873 | &nbsp;&nbsp;&nbsp; 247427 | &nbsp;&nbsp;&nbsp; 578545 | 1730032 |
| High Yield Bond Fund, Class R6 | &nbsp;&nbsp;&nbsp;13249014 | &nbsp;&nbsp;&nbsp; 4230624 | &nbsp;&nbsp;&nbsp; (8871354) | &nbsp;&nbsp;&nbsp;&nbsp; (438607) | &nbsp;&nbsp;&nbsp; 461707 | &nbsp;&nbsp;&nbsp; 8631384 | &nbsp;&nbsp;&nbsp; 305711 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;348180 |
| International Equity Fund, Class R6 | &nbsp;&nbsp;&nbsp;24688445 | &nbsp;&nbsp;&nbsp;&nbsp;1323123 | &nbsp;&nbsp;&nbsp;&nbsp;(2993220) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;43012 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;243101 | &nbsp;&nbsp;&nbsp;&nbsp;23304461 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;317760 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;859943 |
| International Opportunities Fund, Class R6 | &nbsp;&nbsp;&nbsp;14307153 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;662701 | &nbsp;&nbsp;&nbsp;&nbsp;(4180128) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;283767 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(357461) | &nbsp;&nbsp;&nbsp;&nbsp;10716032 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;342267 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;574586 |
| International Responsible Index Fund, Class R6 | &nbsp;&nbsp;&nbsp;20527180 | &nbsp;&nbsp;&nbsp;&nbsp;5969637 | &nbsp;&nbsp;&nbsp;&nbsp;(2643101) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;70130 | &nbsp;&nbsp;&nbsp;&nbsp;1550991 | &nbsp;&nbsp;&nbsp;&nbsp;25474837 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;558770 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;724953 |
| Liquidity Fund, Institutional Class<sup>(1)</sup> | &nbsp;&nbsp;&nbsp; 976096 | &nbsp;&nbsp;&nbsp;21741116 | &nbsp;&nbsp;&nbsp;(19207676) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3509536 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;35539 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | 3509536 |
| Mid-Cap Fund, Class I | &nbsp;&nbsp;&nbsp; 4114314 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;178840 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(317300) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;53827 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(213630) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3816051 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;8831 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;130691 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;82616 |
| Mortgage Access Fund, Class I | &nbsp;&nbsp;&nbsp;11963914 | &nbsp;&nbsp;&nbsp;&nbsp;5757958 | &nbsp;&nbsp;&nbsp;&nbsp;(2178426) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(24579) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(122364) | &nbsp;&nbsp;&nbsp;&nbsp;15396503 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;661435 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | 1561511 |
| Short Duration Income Fund, Class R6 | &nbsp;&nbsp;&nbsp; 6215707 | &nbsp;&nbsp;&nbsp;12422239 | &nbsp;&nbsp;&nbsp;(14740269) | &nbsp;&nbsp;&nbsp;&nbsp;(154456) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;139459 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3882680 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;213151 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;244501 |
| Small-Cap Fund, Class R6 | &nbsp;&nbsp;&nbsp;11121015 | &nbsp;&nbsp;&nbsp;&nbsp;2555138 | &nbsp;&nbsp;&nbsp;&nbsp;(3695507) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;480539 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(815202) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;9645983 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;23344 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;89177 | &nbsp;&nbsp;&nbsp;&nbsp;266758 |
| Ultra-Short Duration Income Fund, Class R6 | &nbsp;&nbsp;&nbsp;26118174 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;377433 | &nbsp;&nbsp;&nbsp;(24556648) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;185597 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(215475) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1909081 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;377134 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;192836 |
| US Large-Cap Core Responsible Index Fund, Class R6 | &nbsp;&nbsp;&nbsp;57166515 | &nbsp;&nbsp;&nbsp;19238764 | &nbsp;&nbsp;&nbsp;(24977196) | &nbsp;&nbsp;&nbsp;1393203 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(697611) | &nbsp;&nbsp;&nbsp;&nbsp;52123675 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;637795 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;538972 | &nbsp;&nbsp;&nbsp;&nbsp;978665 |

---

------

Calvert

Moderate Allocation Fund

June 30, 2025

Schedule of Investments (Unaudited) — continued

------

---

| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Name of<br> Calvert Fund** | **Value,<br> beginning<br> of period** | **Purchases** | **Sales<br> proceeds** | **Net<br> realized<br> gain<br> (loss)** | **Change in<br> unrealized<br> appreciation<br> (depreciation)** | **Value,<br> end of<br> period** | **Dividend<br> income** | **Capital gains<br> distributions<br> received** | **Shares,<br> end of period** |
| US Large-Cap Growth Responsible Index Fund, Class R6 | $29444529 | $4432152 | $(5391005) | $388635 | $1625503 | $30499814 | $186464 | $454691 | &nbsp;&nbsp;&nbsp;&nbsp;433421 |
| US Large-Cap Value Responsible Index Fund, Class R6 | 28897392 | &nbsp;&nbsp;&nbsp; 1699604 | &nbsp;&nbsp;&nbsp; (4953503) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;912470 | &nbsp;&nbsp;&nbsp;&nbsp;(1022695) | &nbsp;&nbsp;&nbsp; 25533268 | &nbsp;&nbsp;&nbsp; 520562 | &nbsp;&nbsp;&nbsp; 943136 | &nbsp;&nbsp;&nbsp;&nbsp;748118 |
| US Mid-Cap Core Responsible Index Fund, Class R6 | &nbsp;&nbsp;&nbsp;&nbsp;9207011 | &nbsp;&nbsp;&nbsp; 2399040 | &nbsp;&nbsp;&nbsp; (2977573) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;633004 | &nbsp;&nbsp;&nbsp;&nbsp; (548331) | &nbsp;&nbsp;&nbsp; 8713151 | &nbsp;&nbsp;&nbsp; 77817 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;204246 |
| **Total** |  |  |  | **$3600313** | **$284535** | **$385894898** | **$8293859** | **$4014508** |  |

---

<sup>(1)</sup> Represents investment in Morgan Stanley Institutional Liquidity Funds - Government Portfolio.

Fair Value Measurements

U.S. generally accepted accounting principles (U.S. GAAP) establishes a disclosure hierarchy that categorizes the inputs to valuation techniques used to value assets and liabilities at measurement date. These inputs are summarized in the three broad levels listed below:

Level 1 - quoted prices in active markets for identical securities

Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risk, etc.)

Level 3 - significant unobservable inputs (including the Fund's own assumptions in determining the fair value of investments)

The inputs or methodologies used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

The following table summarizes the market value of the Fund's holdings as of June 30, 2025, based on the inputs used to value them:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Asset Description** | &nbsp;&nbsp;**Level 1** | &nbsp;&nbsp;**Level 2** | &nbsp;&nbsp;**Level 3** | &nbsp;&nbsp;**Total** |
| Mutual Funds | &nbsp;&nbsp;$382385362 | &nbsp;&nbsp;$— | &nbsp;&nbsp;$— | &nbsp;&nbsp;$382385362 |
| Short-Term Investments | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3509536 | &nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;3509536 |
| **Total Investments** | &nbsp;&nbsp;**$385894898** | &nbsp;&nbsp;**$—** | &nbsp;&nbsp;**$—** | &nbsp;&nbsp;**$385894898** |
| Futures Contracts | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$128213 | &nbsp;&nbsp;$— | &nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$128213 |
| **Total** | &nbsp;&nbsp;**$386023111** | &nbsp;&nbsp;**$—** | &nbsp;&nbsp;**$—** | &nbsp;&nbsp;**$386023111** |

---

For information on the Fund's policy regarding the valuation of investments and other significant accounting policies, please refer to the Fund's most recent annual or semi-annual financial statements.

## Form NPORT-P: Monthly Portfolio Investments Report

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

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

- **a. Name of Registrant:** Calvert Social Investment Fund

- **b. Investment Company Act file number:** 811-03334

- **c. CIK number of Registrant:** 0000356682

- **d. LEI of Registrant:** 549300V0NY9G3Y5OI796

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

  - **Street Address 1:** 2050 M Street NW

  - **City:** Washington

  - **State:** DC

  - **Foreign country:** US

  - **Zip / Postal Code:** 20036

  - **Telephone number:** 202-238-2200

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

- **a. Name of Series:** Calvert Moderate Allocation Fund

- **b. EDGAR series identifier (if any):** S000008722

- **c. LEI of Series:** 549300ORTNKBKFWWD569

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

- **a. Date of fiscal year-end:** 2025-09-30

- **b. Date as of which information is reported:** 2025-06-30

**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:** $387264495.00

**Total Liabilities:** $368595.27

**Net Assets:** $386895899.73

**Cash Not Reported:** $1055078.04

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000023773 | -0.05%               | 3.12%                | 2.95%                |
| Class ID C000099327 | 0.05%                | 3.18%                | 3.02%                |
| Class ID C000023772 | 0.05%                | 3.14%                | 3.01%                |
| Class ID C000235279 | 0.09%                | 3.18%                | 3.04%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-1573155.27             | $1257838.07                                |
| Month 2  | $2945079.69              | $8743912.96                                |
| Month 3  | $400574.04               | $10422421.11                               |

**Designated Index Information**

- **Index Name:** 45% Russell 3000/ 35% Bloomberg US Agg/ 20% MSCI ACWI ex USA IMI

- **Index Identifier:** LEHRSMSCW

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Calvert Core Bond Fund                             | Calvert Core Bond Fund                                              | CUSIP: 131582330<br>LEI: 549300HEFY2HHDRM0E11 | Long             | EC               | RF                | US        |   1567746 | NS      | $24817423.04  | 6.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Bond Fund                                  | Calvert Bond Fund                                                   | CUSIP: 131582322<br>LEI: 549300T75TF7NTCFI791 | Long             | EC               | RF                | US        |   3719441 | NS      | $54415426.47  | 14.06%            |  |  |  | No            |                  1 | On Loan: No      |
| Calvert US Mid Cap Core Responsible Index Fund     | Calvert US Mid Cap Core Responsible Index Fund                      | CUSIP: 131618456<br>LEI: 549300I74Z158YTBPO44 | Long             | EC               | RF                | US        |    204246 | NS      | $8713151.21   | 2.25%             |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                             | US ULTRA BOND CBT SEP25                                             | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |        23 | NC      | $70405.99     | 0.02%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert International Opportunities Fund           | Calvert International Opportunities Fund                            | CUSIP: 131649758<br>LEI: 549300125QOYCBC7IB51 | Long             | EC               | RF                | US        |    574586 | NS      | $10716032.16  | 2.77%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert US Large Cap Core Responsible Index Fund   | Calvert US Large Cap Core Responsible Index Fund                    | CUSIP: 131582298<br>LEI: 549300PO0F0AV64IR605 | Long             | EC               | RF                | US        |    978665 | NS      | $52123674.57  | 13.47%            |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Mortgage Access Fund                       | Calvert Mortgage Access Fund                                        | CUSIP: 131582231<br>LEI: 549300O2JSVSVL35QD76 | Long             | EC               | RF                | US        |   1553741 | NS      | $15319883.92  | 3.96%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert High Yield Bond Fund                       | Calvert High Yield Bond Fund                                        | CUSIP: 131582272<br>LEI: 549300CCIV46L1T22Z08 | Long             | EC               | RF                | US        |    346530 | NS      | $8590484.08   | 2.22%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Focused Value Fund                         | Calvert Focused Value Fund                                          | CUSIP: 131582132<br>LEI: 549300Z5XUUT6OW4YT43 | Long             | EC               | RF                | US        |   1730032 | NS      | $20327872.78  | 5.25%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert US Large Cap Growth Responsible Index Fund | Calvert US Large Cap Growth Responsible Index Fund                  | CUSIP: 131618472<br>LEI: 5493000179G37BJVLO31 | Long             | EC               | RF                | US        |    433421 | NS      | $30499814.03  | 7.88%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Emerging Markets Advancement Fund          | Calvert Emerging Markets Advancement Fund                           | CUSIP: 131649717<br>LEI: 549300OOWWGW13TF0P06 | Long             | EC               | RF                | US        |   1226058 | NS      | $16674388.92  | 4.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Emerging Markets Equity Fund               | Calvert Emerging Markets Equity Fund                                | CUSIP: 131649766<br>LEI: 549300L4S5NY62FOKA38 | Long             | EC               | RF                | US        |    389436 | NS      | $7827659.52   | 2.02%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Flexible Bond Fund                         | Calvert Flexible Bond Fund                                          | CUSIP: 13161X840<br>LEI: 549300HDLJYKTU171023 | Long             | EC               | RF                | US        |    770776 | NS      | $11415193.05  | 2.95%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert US Large Cap Value Responsible Index Fund  | Calvert US Large Cap Value Responsible Index Fund                   | CUSIP: 131618464<br>LEI: 5493005WGBW1GHF4CG37 | Long             | EC               | RF                | US        |    748118 | NS      | $25533268.50  | 6.60%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Floating-Rate Advantage Fund               | Calvert Floating-Rate Advantage Fund                                | CUSIP: 13161X865<br>LEI: 549300GG1YFY0YH1UJ86 | Long             | EC               | RF                | US        |    868659 | NS      | $7600763.28   | 1.96%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Mid-Cap Fund                               | Calvert Mid-Cap Fund                                                | CUSIP: 131649709<br>LEI: 549300Y1UC9HCBUDKZ85 | Long             | EC               | RF                | US        |     82616 | NS      | $3816051.01   | 0.99%             |  |  |  | No            |                  1 | On Loan: No      |
| Morgan Stanley & Co. LLC                           | Morgan Stanley Institutional Liquidity Funds - Government Portfolio | CUSIP: 61747C707<br>LEI: 549300BI6Y5SI6BYPB26 | Long             | STIV             | RF                | US        |   3509536 | NS      | $3509535.95   | 0.91%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Small Cap Fund                             | Calvert Small Cap Fund                                              | CUSIP: 13161P672<br>LEI: 549300MIJR64EECJ6M85 | Long             | EC               | RF                | US        |    266758 | NS      | $9645982.98   | 2.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Equity Fund                                | Calvert Equity Fund                                                 | CUSIP: 131582280<br>LEI: 5493008KHIQHXPKPLB89 | Long             | EC               | RF                | US        |    197793 | NS      | $19261088.57  | 4.98%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert International Responsible Index Fund       | Calvert International Responsible Index Fund                        | CUSIP: 13161Y848<br>LEI: 5493002R7L7YSTUULM88 | Long             | EC               | RF                | US        |    724953 | NS      | $25474837.39  | 6.58%             |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                             | US LONG BOND(CBT) SEP25                                             | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |        20 | NC      | $57806.94     | 0.01%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert International Equity Fund                  | Calvert International Equity Fund                                   | CUSIP: 131649741<br>LEI: 549300DYXGATLWKZ1990 | Long             | EC               | RF                | US        |    859943 | NS      | $23304460.64  | 6.02%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Ultra-Short Duration Income Fund           | Calvert Ultra-Short Duration Income Fund                            | CUSIP: 131582314<br>LEI: 549300IXKXR5NQT6M528 | Long             | EC               | RF                | US        |    192084 | NS      | $1901629.91   | 0.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Calvert Short-Duration Income Fund                 | Calvert Short-Duration Income Fund                                  | CUSIP: 131582264<br>LEI: 549300KRHGOWQEB8SR45 | Long             | EC               | RF                | US        |    243441 | NS      | $3865849.40   | 1.00%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2025-07-25

**Name of Applicant:** Calvert Social Investment Fund

**Signature:** James Kirchner

**Name of Signer:** James Kirchner

**Title:** Treasurer