# EDGAR Filing Document

**Accession Number:** 0000031266
**File Stem:** 0001410368-26-034154
**Filing Date:** 2026-3
**Character Count:** 30832
**Document Hash:** 97fe76f237b2c713ed5f58091d913014
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-034154.hdr.sgml**: 20260331

**ACCESSION NUMBER**: 0001410368-26-034154

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20260131

**FILED AS OF DATE**: 20260331

**DATE AS OF CHANGE**: 20260331

**PERIOD START**: 20261031

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Eaton Vance Special Investment Trust
- **CENTRAL INDEX KEY:** 0000031266

**ORGANIZATION NAME:**
- **EIN:** 046039283

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-01545
- **FILM NUMBER:** 26818219

**BUSINESS ADDRESS:**
- **STREET 1:** ONE POST OFFICE SQUARE
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109
- **BUSINESS PHONE:** 6174828260

**MAIL ADDRESS:**
- **STREET 1:** ONE POST OFFICE SQUARE
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** EATON VANCE SPECIAL INVESTMENT TRUST
- **DATE OF NAME CHANGE:** 19930301

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** EATON VANCE SPECIAL EQUITIES FUND
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** EATON VANCE SPECIAL EQUITIES FUND INC
- **DATE OF NAME CHANGE:** 19890619

## Series and Classes Contracts Data

### Eaton Vance Short Duration Inflation-Protected Income Fund (Series ID: S000028366)

| Class ID   | Class Name                                                         | Ticker Symbol   |
|:---|:---|:---|
| C000086684 | Eaton Vance Short Duration Inflation-Protected Income Fund Class A | EARRX           |
| C000086685 | Eaton Vance Short Duration Inflation-Protected Income Fund Class C | ECRRX           |
| C000086686 | Eaton Vance Short Duration Inflation-Protected Income Fund Class I | EIRRX           |

## Nport-Ex

Eaton Vance<br>

Short Duration Inflation-Protected Income Fund

January 31, 2026 (Unaudited)

------

Eaton Vance Short Duration Inflation-Protected Income Fund (the Fund) is a non-diversified series of Eaton Vance Special Investment Trust. The Fund seeks its investment objective by allocating its assets to certain registered investment companies (each a Portfolio) sponsored by the Eaton Vance organization. The Fund owns a pro rata interest in the net assets of each Portfolio in which it invests. At January 31, 2026, the Fund owned approximately 100% of Short Duration Inflation-Protected Income Portfolio's outstanding interests and 2.2% of Senior Debt Portfolio's outstanding interests. The Fund's Portfolio of Investments at January 31, 2026 is set forth below.

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Eaton Vance<br>

Short Duration Inflation-Protected Income Fund

January 31, 2026

Portfolio of Investments (Unaudited)

------

Investments in Affiliated Portfolios

---

| | | |
|:---|:---|:---|
| **Description** | **Value** | &nbsp;&nbsp;**% of Net<br> Assets** |
| Senior Debt Portfolio |  |  |
| &nbsp;&nbsp;&nbsp;(identified cost $111,467,769) | $111423155 | &nbsp;&nbsp;&nbsp;&nbsp;20.9% |
| Short Duration Inflation-Protected Income Portfolio |  |  |
| &nbsp;&nbsp;&nbsp;(identified cost $413,321,364) | &nbsp;&nbsp;420403268 | &nbsp;&nbsp;&nbsp;&nbsp;79.1 |
| Total Investments in Affiliated Portfolios<br> (identified cost $524,789,133) | **$531826423** | &nbsp;&nbsp;**100.0%** |
| Total Investments<br> (identified cost $524,789,133) | **$531826423** | &nbsp;&nbsp;**100.0%** |
| Other Assets, Less Liabilities | **$(43886)** | &nbsp;&nbsp;&nbsp;&nbsp;**(0.0)%<sup>†</sup>** |
| Net Assets | **$531782537** | &nbsp;&nbsp;**100.0%** |

---

---

| | |
|:---|:---|
| <sup>†</sup> | Amount is less than 0.05% or (0.05)%, as applicable. |

---

Fair Value Measurements

Under generally accepted accounting principles for fair value measurements, a three-tier hierarchy to prioritize the assumptions, referred to as inputs, is used in valuation techniques to measure fair value. The three-tier hierarchy of inputs is summarized in the three broad levels listed below.

• Level 1 – quoted prices in active markets for identical investments

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

• Level 3 – significant unobservable inputs (including a fund's own assumptions in determining the fair value of investments)

In cases where the inputs used to measure fair value fall in different levels of the fair value hierarchy, the level disclosed is determined based on the lowest level input that is significant to the fair value measurement in its entirety. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities. At January 31, 2026 and October 31, 2025, the Fund's investments in the Portfolios were valued based on Level 1 inputs.

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.

The Short Duration Inflation-Protected Income Portfolio's Portfolio of Investments is set forth below. A copy of Part F to Form N-PORT (containing a Portfolio of Investments) for Senior Debt Portfolio at January 31, 2026 is available by calling Eaton Vance at 1-800-262-1122 or in the EDGAR database on the Securities and Exchange Commission's website at www.sec.gov.

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Short Duration Inflation-Protected Income Portfolio<br>

January 31, 2026

Portfolio of Investments (Unaudited)

------

Asset-Backed Securities — 0.8%

---

| | | |
|:---|:---|:---|
| **<br>Security** | **Principal<br> Amount<br> (000's omitted)** | &nbsp;&nbsp;**Value** |
| Acacia LLC, Series 2025-1, Class A, 5.24%, 11/15/37<sup>(1)</sup> | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;661 | &nbsp;&nbsp;$661767 |
| Coinstar Funding LLC, Series 2017-1A, Class A2, 5.216%, 4/25/47<sup>(1)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;703 | &nbsp;&nbsp;&nbsp;&nbsp; 798101 |
| MVW LLC, Series 2020-1A, Class A, 1.74%, 10/20/37<sup>(1)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;16 | &nbsp;&nbsp;&nbsp;&nbsp; 15776 |
| Saluda Grade Alternative Mortgage Trust, Series 2025-LOC5, Class A1A, 5.273%, (1 mo. SOFR + 1.60%), 10/25/55<sup>(1)(2)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;729 | &nbsp;&nbsp;&nbsp;&nbsp; 734174 |
| SpringCastle America Funding LLC, Series 2020-AA, Class A, 1.97%, 9/25/37<sup>(1)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;291 | &nbsp;&nbsp;&nbsp;&nbsp; 275401 |
| Vantage Data Centers LLC, Series 2020-2A, Class A2, 1.992%, 9/15/45<sup>(1)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1105 | &nbsp;&nbsp;&nbsp;&nbsp; 1057318 |
| Total Asset-Backed Securities<br> (identified cost $3,511,627) |  | &nbsp;&nbsp;**$3542537** |

---

Commercial Mortgage-Backed Securities — 0.5%

---

| | | |
|:---|:---|:---|
| **<br>Security** | **Principal<br> Amount<br> (000's omitted)** | &nbsp;&nbsp;**Value** |
| COMM Mortgage Trust: |  |  |
| &nbsp;&nbsp;&nbsp;Series 2013-CR11, Class D, 4.468%, 8/10/50<sup>(1)(3)</sup> | $347 | &nbsp;&nbsp;$336132 |
| &nbsp;&nbsp;&nbsp;Series 2015-CR22, Class D, 3.699%, 3/10/48<sup>(1)(3)</sup> | &nbsp;&nbsp; 1000 | &nbsp;&nbsp;&nbsp;&nbsp; 800500 |
| DBC Mortgage Trust, Series 2025-DBC, Class A, 5.031%, (1 mo. SOFR + 1.35%), 11/15/42<sup>(1)(2)</sup> | &nbsp;&nbsp; 410 | &nbsp;&nbsp;&nbsp;&nbsp; 411336 |
| JP Morgan Mortgage Trust, Series 2023-HE2, Class A1, 5.402%, (30-day SOFR Average + 1.70%), 3/20/54<sup>(1)(2)</sup> | &nbsp;&nbsp; 631 | &nbsp;&nbsp;&nbsp;&nbsp; 633972 |
| Total Commercial Mortgage-Backed Securities<br> (identified cost $2,401,021) |  | &nbsp;&nbsp;**$2181940** |

---

Exchange-Traded Funds — 6.4%

---

| | | |
|:---|:---|:---|
| **Security** | **Shares** | &nbsp;&nbsp;**Value** |
| Fixed-Income Funds — 6.4% | Fixed-Income Funds — 6.4% | Fixed-Income Funds — 6.4% |
| Eaton Vance Short Duration Income ETF<sup>(4)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;401000 | &nbsp;&nbsp;$20635460 |
| Eaton Vance Ultra-Short Income ETF<sup>(4)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;119000 | &nbsp;&nbsp;&nbsp;&nbsp; 6067810 |
| Total Exchange-Traded Funds<br> (identified cost $26,529,480) |  | &nbsp;&nbsp;**$26703270** |

---

U.S. Treasury Obligations — 90.6%

---

| | | |
|:---|:---|:---|
| **<br>Security** | **Principal<br> Amount<br> (000's omitted)** | &nbsp;&nbsp;**Value** |
| U.S. Treasury Inflation-Indexed Bonds: |  |  |
| &nbsp;&nbsp;&nbsp;2.50%, 1/15/29<sup>(5)</sup> | $&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;18119 | &nbsp;&nbsp;$18879270 |
| &nbsp;&nbsp;&nbsp;3.625%, 4/15/28<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;22448 | &nbsp;&nbsp;&nbsp;&nbsp; 23730166 |
| &nbsp;&nbsp;&nbsp;3.875%, 4/15/29<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;35741 | &nbsp;&nbsp;&nbsp;&nbsp; 38824446 |
| U.S. Treasury Inflation-Indexed Notes: |  |  |
| &nbsp;&nbsp;&nbsp;0.125%, 4/15/27<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4 | &nbsp;&nbsp;&nbsp;&nbsp; 3564 |
| &nbsp;&nbsp;&nbsp;0.125%, 1/15/30<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;14704 | &nbsp;&nbsp;&nbsp;&nbsp; 14110937 |
| &nbsp;&nbsp;&nbsp;0.125%, 7/15/30<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;36388 | &nbsp;&nbsp;&nbsp;&nbsp; 34769854 |
| &nbsp;&nbsp;&nbsp;0.125%, 1/15/31<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;37976 | &nbsp;&nbsp;&nbsp;&nbsp; 35829404 |
| &nbsp;&nbsp;&nbsp;0.25%, 7/15/29<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;10645 | &nbsp;&nbsp;&nbsp;&nbsp; 10380784 |
| &nbsp;&nbsp;&nbsp;0.375%, 1/15/27<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;2 | &nbsp;&nbsp;&nbsp;&nbsp; 2152 |
| &nbsp;&nbsp;&nbsp;0.375%, 7/15/27<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;21998 | &nbsp;&nbsp;&nbsp;&nbsp; 21933942 |
| &nbsp;&nbsp;&nbsp;0.75%, 7/15/28<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;15497 | &nbsp;&nbsp;&nbsp;&nbsp; 15470285 |
| &nbsp;&nbsp;&nbsp;0.875%, 1/15/29<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;20066 | &nbsp;&nbsp;&nbsp;&nbsp; 19966834 |
| &nbsp;&nbsp;&nbsp;1.125%, 10/15/30<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;22198 | &nbsp;&nbsp;&nbsp;&nbsp; 22099582 |
| &nbsp;&nbsp;&nbsp;1.25%, 4/15/28<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;21804 | &nbsp;&nbsp;&nbsp;&nbsp; 21916194 |
| &nbsp;&nbsp;&nbsp;1.625%, 10/15/27<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;11961 | &nbsp;&nbsp;&nbsp;&nbsp; 12150761 |
| &nbsp;&nbsp;&nbsp;1.625%, 10/15/29<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;17617 | &nbsp;&nbsp;&nbsp;&nbsp; 17975357 |
| &nbsp;&nbsp;&nbsp;1.625%, 4/15/30<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;14257 | &nbsp;&nbsp;&nbsp;&nbsp; 14476260 |
| &nbsp;&nbsp;&nbsp;2.125%, 4/15/29<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;23581 | &nbsp;&nbsp;&nbsp;&nbsp; 24317955 |
| &nbsp;&nbsp;&nbsp;2.375%, 10/15/28<sup>(5)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;32809 | &nbsp;&nbsp;&nbsp;&nbsp; 34094256 |
| Total U.S. Treasury Obligations<br> (identified cost $376,167,889) |  | &nbsp;&nbsp;**$380932003** |

---

Short-Term Investments — 0.4%

---

| | | |
|:---|:---|:---|
| **Security** | **Shares** | &nbsp;&nbsp;**Value** |
| Morgan Stanley Institutional Liquidity Funds - Government Portfolio, Institutional Class, 3.61%<sup>(6)</sup> | &nbsp;&nbsp;&nbsp;&nbsp;1540930 | &nbsp;&nbsp;$1540930 |
| Total Short-Term Investments<br> (identified cost $1,540,930) |  | &nbsp;&nbsp;**$1540930** |
| Total Investments — 98.7%<br> (identified cost $410,150,947) |  | &nbsp;&nbsp;**$414900680** |
| Other Assets, Less Liabilities — 1.3% |  | &nbsp;&nbsp;**$5530703** |
| Net Assets — 100.0% |  | &nbsp;&nbsp;**$420431383** |

---

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Short Duration Inflation-Protected Income Portfolio<br>

January 31, 2026

Portfolio of Investments (Unaudited) — continued

------

---

| | |
|:---|:---|
| The percentage shown for each investment category in the Portfolio of Investments is based on net assets. | The percentage shown for each investment category in the Portfolio of Investments is based on net assets. |
| <sup>(1)</sup> | Security exempt from registration under Rule 144A of the Securities Act of 1933, as amended. These securities may be sold in certain transactions in reliance on an exemption from registration (normally to qualified institutional buyers). At January 31, 2026, the aggregate value of these securities is $5,724,477 or 1.4% of the Portfolio's net assets. |
| <sup>(2)</sup> | Variable rate security. The stated interest rate represents the rate in effect at January 31, 2026. |

---

<sup>(3)</sup> Weighted average fixed-rate coupon that changes/updates monthly. Rate shown is the rate at January 31, 2026.

<sup>(4)</sup> Affiliated fund.

<sup>(5)</sup> Inflation-linked security whose principal is adjusted for inflation based on changes in the U.S. Consumer Price Index. Interest is calculated based on the inflation-adjusted principal.

<sup>(6)</sup> May be deemed to be an affiliated investment company. The rate shown is the annualized seven-day yield as of January 31, 2026.

---

| | | | | | |
|:---|:---|:---|:---|:---|:---|
| **Futures Contracts** | **Futures Contracts** | **Futures Contracts** | **Futures Contracts** | **Futures Contracts** | **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/Unrealized<br> Appreciation<br> (Depreciation)** |
| **Interest Rate Futures** |  |  |  |  |  |
| U.S. 2-Year Treasury Note | &nbsp;&nbsp;&nbsp;&nbsp;100 | &nbsp;&nbsp;&nbsp;&nbsp;Long | &nbsp;&nbsp;&nbsp;&nbsp;3/31/26 | &nbsp;&nbsp;&nbsp;&nbsp;$20849219 | &nbsp;&nbsp;&nbsp;&nbsp;$(23209) |
| U.S. 5-Year Treasury Note | &nbsp;&nbsp;&nbsp;&nbsp;148 | &nbsp;&nbsp;&nbsp;&nbsp;Long | &nbsp;&nbsp;&nbsp;&nbsp;3/31/26 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;16121594 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 23950 |
|  |  |  |  |  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**$741** |

---

---

| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Inflation Swaps (Centrally Cleared)** | **Inflation Swaps (Centrally Cleared)** | **Inflation Swaps (Centrally Cleared)** | **Inflation Swaps (Centrally Cleared)** | **Inflation Swaps (Centrally Cleared)** | **Inflation Swaps (Centrally Cleared)** | **Inflation Swaps (Centrally Cleared)** |  |  |  |
| **Notional Amount<br> (000's omitted)** | **Notional Amount<br> (000's omitted)** | **Portfolio<br> Pays/Receives<br> Return on<br> Reference<br> Index** | **Reference Index** | **Portfolio<br> Pays/Receives<br> Rate** | **Annual<br> Rate** | **Termination<br> Date** | **Value** | **Unamortized<br> Upfront<br> Receipts<br> (Payments)** | **Unrealized<br> Appreciation<br> (Depreciation)** |
| USD | 20000 | Receives | Return on CPI-U (NSA)<br> (pays upon termination) | Pays | 2.82%<br> (pays upon termination) | 2/11/27 | $894422 | $— | &nbsp;&nbsp;&nbsp;$894422 |
| USD | 30000 | Receives | Return on CPI-U (NSA)<br> (pays upon termination) | Pays | 3.61%<br> (pays upon termination) | 3/23/27 | &nbsp;&nbsp;&nbsp;&nbsp; (131049) | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;(131049) |
| USD | 10000 | Receives | Return on CPI-U (NSA)<br> (pays upon termination) | Pays | 2.55%<br> (pays upon termination) | 4/19/27 | &nbsp;&nbsp;&nbsp;1083727 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;1083727 |
| USD | 15000 | Receives | Return on CPI-U (NSA)<br> (pays upon termination) | Pays | 3.24%<br> (pays upon termination) | 11/19/27 | &nbsp;&nbsp;&nbsp; 477131 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;477131 |
| USD | 11400 | Receives | Return on CPI-U (NSA)<br> (pays upon termination) | Pays | 2.41%<br> (pays upon termination) | 1/22/28 | &nbsp;&nbsp;&nbsp; 25764 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;25764 |
| USD | 15000 | Receives | Return on CPI-U (NSA)<br> (pays upon termination) | Pays | 2.64%<br> (pays upon termination) | 6/23/28 | &nbsp;&nbsp;&nbsp;&nbsp; (11369) | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;(11369) |
| USD | 10000 | Receives | Return on CPI-U (NSA)<br> (pays upon termination) | Pays | 2.51%<br> (pays upon termination) | 4/25/29 | &nbsp;&nbsp;&nbsp; 4373 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;4373 |

---

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Short Duration Inflation-Protected Income Portfolio<br>

January 31, 2026

Portfolio of Investments (Unaudited) — continued

------

---

| | | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Inflation Swaps (Centrally Cleared) (continued)** | **Inflation Swaps (Centrally Cleared) (continued)** | **Inflation Swaps (Centrally Cleared) (continued)** | **Inflation Swaps (Centrally Cleared) (continued)** | **Inflation Swaps (Centrally Cleared) (continued)** | **Inflation Swaps (Centrally Cleared) (continued)** | **Inflation Swaps (Centrally Cleared) (continued)** |  |  |  |
| **Notional Amount<br> (000's omitted)** | **Notional Amount<br> (000's omitted)** | **Portfolio<br> Pays/Receives<br> Return on<br> Reference<br> Index** | **Reference Index** | **Portfolio<br> Pays/Receives<br> Rate** | **Annual<br> Rate** | **Termination<br> Date** | **Value** | **Unamortized<br> Upfront<br> Receipts<br> (Payments)** | **Unrealized<br> Appreciation<br> (Depreciation)** |
| USD | 20000 | Receives | Return on CPI-U (NSA)<br> (pays upon termination) | Pays | 2.64%<br> (pays upon termination) | 2/13/30 | $(62114) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;$(62114) |
| USD | 15000 | Receives | Return on CPI-U (NSA)<br> (pays upon termination) | Pays | 2.36%<br> (pays upon termination) | 4/24/30 | &nbsp;&nbsp;&nbsp;&nbsp; 103470 | &nbsp;&nbsp;&nbsp;&nbsp;(35754) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;67716 |
|  |  |  |  |  |  |  | **$2384355** | **$(35754)** | **$2348601** |

---

---

| | |
|:---|:---|
| **Abbreviations:** | **Abbreviations:** |
| CPI-U (NSA) | – Consumer Price Index All Urban Non-Seasonally Adjusted |
| SOFR | – Secured Overnight Financing Rate |

---

---

| | |
|:---|:---|
| **Currency Abbreviations:** | **Currency Abbreviations:** |
| USD | – United States Dollar |

---

At January 31, 2026, the Portfolio had sufficient cash and/or securities to cover commitments under open derivative contracts.

The Portfolio is subject to interest rate risk in the normal course of pursuing its investment objective and its use of derivatives. The Portfolio entered into inflation swap contracts to swap nominal interest payments with respect to its investments in certain fixed or floating-rate debt (including floating-rate loans) for payments based on changes in the U.S. Consumer Price Index or other measures of inflation. The Portfolio utilized interest rate futures contracts to enhance total return, to seek to hedge against fluctuations in interest rates and/or to change the effective duration of its portfolio.

Affiliated Investments

At January 31, 2026, the value of the Portfolio's investments in funds that may be deemed to be affiliated was $28,244,200, which represents 6.8% of the Portfolio's net assets. Transactions in such investments by the Portfolio for the fiscal year to date ended January 31, 2026 were as follows:

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Name** | **Value,<br> beginning<br> of period** | **Purchases** | **Sales<br> proceeds** | **Net realized<br> gain (loss)** | **Change in<br> unrealized<br> appreciation<br> (depreciation)** | **Value, end<br> of period** | **Dividend<br> income** | **Shares,<br> end of period** |
| **Exchange-Traded Funds** | **Exchange-Traded Funds** | **Exchange-Traded Funds** | **Exchange-Traded Funds** | **Exchange-Traded Funds** | **Exchange-Traded Funds** | **Exchange-Traded Funds** | **Exchange-Traded Funds** | **Exchange-Traded Funds** |
| Eaton Vance Short Duration Income ETF | $21217875 | $— | $(617760) | $10920 | $24425 | $20635460 | $257115 | &nbsp;&nbsp;&nbsp;&nbsp;401000 |
| Eaton Vance Total Return Bond ETF | &nbsp;&nbsp;&nbsp; 4974575 | &nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; (4969750) | &nbsp;&nbsp;&nbsp;115231 | &nbsp;&nbsp;&nbsp;&nbsp;(120056) | &nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;339338 | &nbsp;&nbsp; — |
| Eaton Vance Ultra-Short Income ETF | &nbsp;&nbsp;&nbsp; 6620900 | &nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; (559570) | &nbsp;&nbsp;&nbsp; 880 | &nbsp;&nbsp;&nbsp; 5600 | &nbsp;&nbsp;&nbsp; 6067810 | &nbsp;&nbsp;&nbsp;&nbsp;82223 | &nbsp;&nbsp;&nbsp;&nbsp;119000 |
| **Short-Term Investments** | **Short-Term Investments** | **Short-Term Investments** | **Short-Term Investments** | **Short-Term Investments** | **Short-Term Investments** | **Short-Term Investments** | **Short-Term Investments** | **Short-Term Investments** |
| Liquidity Fund, Institutional Class<sup>(1)</sup> | &nbsp;&nbsp;&nbsp; 34202 | &nbsp;&nbsp;&nbsp;18261776 | &nbsp;&nbsp;&nbsp;(16755048) | &nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 1540930 | &nbsp;&nbsp;&nbsp;&nbsp;12175 | 1540930 |
| **Total** |  |  |  | **$127031** | &nbsp;&nbsp;**$(90031)** | **$28244200** | **$690851** |  |

---

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

Fair Value Measurements

Under generally accepted accounting principles for fair value measurements, a three-tier hierarchy to prioritize the assumptions, referred to as inputs, is used in valuation techniques to measure fair value. The three-tier hierarchy of inputs is summarized in the three broad levels listed below.

• Level 1 – quoted prices in active markets for identical investments

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

------

Short Duration Inflation-Protected Income Portfolio<br>

January 31, 2026

Portfolio of Investments (Unaudited) — continued

------

• Level 3 – significant unobservable inputs (including a fund's own assumptions in determining the fair value of investments)

In cases where the inputs used to measure fair value fall in different levels of the fair value hierarchy, the level disclosed is determined based on the lowest level input that is significant to the fair value measurement in its entirety. The inputs or methodology used for valuing securities are not necessarily an indication of the risk associated with investing in those securities.

At January 31, 2026, the hierarchy of inputs used in valuing the Portfolio's investments and open derivative instruments, which are carried at fair value, were as follows:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Asset Description** | &nbsp;&nbsp;**Level 1** | &nbsp;&nbsp;&nbsp;&nbsp;**Level 2** | &nbsp;&nbsp;&nbsp;&nbsp;**Level 3** | &nbsp;&nbsp;&nbsp;&nbsp;**Total** |
| Asset-Backed Securities | &nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;$3542537 | &nbsp;&nbsp;&nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;$3542537 |
| Commercial Mortgage-Backed Securities | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2181940 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2181940 |
| Exchange-Traded Funds | &nbsp;&nbsp;&nbsp;&nbsp;26703270 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 26703270 |
| U.S. Treasury Obligations | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;380932003 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;380932003 |
| Short-Term Investments | &nbsp;&nbsp;&nbsp;&nbsp; 1540930 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 1540930 |
| **Total Investments** | &nbsp;&nbsp;**$28244200** | &nbsp;&nbsp;&nbsp;&nbsp;**$386656480** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**$—** | &nbsp;&nbsp;&nbsp;&nbsp;**$414900680** |
| Futures Contracts | &nbsp;&nbsp;$23950 | &nbsp;&nbsp;&nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;$23950 |
| Swap Contracts | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2588887 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 2588887 |
| **Total** | &nbsp;&nbsp;**$28268150** | &nbsp;&nbsp;&nbsp;&nbsp;**$389245367** | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**$—** | &nbsp;&nbsp;&nbsp;&nbsp;**$417513517** |
| **Liability Description** |  |  |  |  |
| Futures Contracts | &nbsp;&nbsp;$(23209) | &nbsp;&nbsp;&nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;$— | &nbsp;&nbsp;&nbsp;&nbsp;$(23209) |
| Swap Contracts | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (204532) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; (204532) |
| **Total** | &nbsp;&nbsp;**$(23209)** | &nbsp;&nbsp;&nbsp;&nbsp;**$(204532)** | &nbsp;&nbsp;&nbsp;&nbsp;**$—** | &nbsp;&nbsp;&nbsp;&nbsp;**$(227741)** |

---

#### Derivatives . Futures contracts are valued at the closing settlement price established by the board of trade or exchange on which they are traded.
**Futures Contracts - Upon entering into a futures contract, the Fund is required to deposit with the broker, either in cash or securities, an amount equal to a certain percentage of the contract amount (initial margin). Subsequent payments, known as variation margin, are made or received by the Fund each business day, depending on the daily fluctuations in the value of the underlying security, and are recorded as unrealized gains or losses by the Fund. Gains (losses) are realized upon the expiration or closing of the futures contracts. Should market conditions change unexpectedly, the Fund may not achieve the anticipated benefits of the futures contracts and may realize a loss. Futures contracts have minimal counterparty risk as they are exchange traded and the clearinghouse for the exchange is substituted as the counterparty, guaranteeing counterparty performance.**

For additional information on the Portfolio's policy regarding the valuation of investments and other significant accounting policies, please refer to the Portfolio'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:** Eaton Vance Special Investment Trust

- **b. Investment Company Act file number:** 811-01545

- **c. CIK number of Registrant:** 0000031266

- **d. LEI of Registrant:** 5493003X08Y3GH1CDY86

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

  - **Street Address 1:** One Post Office Square

  - **City:** BOSTON

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02109

  - **Telephone number:** 617-482-8260

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

- **a. Name of Series:** Short Duration Inflation-Protected Income Fund

- **b. EDGAR series identifier (if any):** S000028366

- **c. LEI of Series:** IBHD9C1D7UVOUQU78532

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

- **a. Date of fiscal year-end:** 2026-10-31

- **b. Date as of which information is reported:** 2026-01-31

**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:** $531980146.51

**Total Liabilities:** $174868.07

**Net Assets:** $531805278.44

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000086684 | 0.10%                | -0.06%               | 0.50%                |
| Class ID C000086685 | 0.10%                | -0.15%               | 0.40%                |
| Class ID C000086686 | 0.10%                | 0.00%                | 0.50%                |

**Monthly Gains & Losses**

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

**Designated Index Information**

- **Index Name:** Securities Portfolio

- **Index Identifier:** Securities Portfolio

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| Short Duration Inflation-Protected Income Portfolio | Short Duration Inflation-Protected Income Portfolio | CUSIP: 000000000<br>LEI: 549300UOMB5ER6NIQJ37 | Long             | EC               | RF                | US        |  40273976 | NS      | $420460304.27 | 79.06%            |  |  |  | No            | N/A                | On Loan: No      |
| Senior Debt Portfolio (MA)                          | Senior Debt Portfolio (MA)                          | CUSIP: 000000000<br>LEI: 5493009DZ4DLQ0NAB757 | Long             | EC               | RF                | US        |  10957540 | NS      | $111438186.38 | 20.95%            |  |  |  | No            | N/A                | On Loan: No      |

### Signature

**Date Signed:** 2026-02-25

**Name of Applicant:** Eaton Vance Special Investment Trust

**Signature:** James Kirchner

**Name of Signer:** James Kirchner

**Title:** Treasurer