# EDGAR Filing Document

**Accession Number:** 0000063075
**File Stem:** 0001410368-26-032759
**Filing Date:** 2026-3
**Character Count:** 87037
**Document Hash:** f72805174d1d4aeaeb850769d52d9676
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-032759.hdr.sgml**: 20260327

**ACCESSION NUMBER**: 0001410368-26-032759

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 4

**CONFORMED PERIOD OF REPORT**: 20260131

**FILED AS OF DATE**: 20260327

**DATE AS OF CHANGE**: 20260327

**PERIOD START**: 20261031

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** MFS SERIES TRUST IX
- **CENTRAL INDEX KEY:** 0000063075

**ORGANIZATION NAME:**
- **EIN:** 042535629
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0430

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-02464
- **FILM NUMBER:** 26802276

**BUSINESS ADDRESS:**
- **STREET 1:** 111 HUNTINGTON AVENUE
- **STREET 2:** 21ST FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199
- **BUSINESS PHONE:** 18006372929

**MAIL ADDRESS:**
- **STREET 1:** 111 HUNTINGTON AVENUE
- **STREET 2:** 21ST FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02199

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS SERIES TRUST IX /MA/
- **DATE OF NAME CHANGE:** 19951218

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS SERIES TRUST IX
- **DATE OF NAME CHANGE:** 19950207

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** MFS BOND FUND
- **DATE OF NAME CHANGE:** 19930408

## Series and Classes Contracts Data

### MFS Inflation-Adjusted Bond Fund (Series ID: S000002493)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000006724 | A            | MIAAX           |
| C000006725 | R4           | MIAJX           |
| C000006726 | B            | MIABX           |
| C000006727 | C            | MIACX           |
| C000006728 | I            | MIAIX           |
| C000006730 | R1           | MIALX           |
| C000006732 | R2           | MIATX           |
| C000006733 | R3           | MIAHX           |
| C000126364 | R6           | MIAKX           |

## Nport-Ex

IAB-Q1

![](imgcb97bf2f1.gif)

**Quarterly Report**

January 31, 2026

MFS<sup>®</sup> Inflation-Adjusted <br>Bond Fund

![](img7055dd692.gif)

------

**Portfolio of Investments**

1/31/26 (unaudited)

The Portfolio of Investments is a complete list of all securities owned by your fund. It is categorized by broad-based asset classes.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Bonds – 99.2%  | Bonds – 99.2%  | Bonds – 99.2%  |
| Asset-Backed & Securitized – 2.9% | Asset-Backed & Securitized – 2.9% | Asset-Backed & Securitized – 2.9% |
| 3650R Commercial Mortgage Trust, 2021-PF1, "XA", 0.992%, 11/15/2054 (i) | $14376349 | &nbsp;&nbsp;&nbsp; $498759 |
| AREIT 2022-CRE6 Trust, "AS", FLR, 5.352% (SOFR - 30 day + 1.65%), 1/20/2037 (n) | 2462500 | &nbsp;&nbsp;&nbsp; 2453257 |
| ARI Fleet Lease Trust, 2025-A, "A2", 4.38%, 1/17/2034 (n) | 1327528 | &nbsp;&nbsp;&nbsp; 1331895 |
| Babson CLO Ltd., 2021-3A, "B1R", FLR, 5.297% (SOFR - 3mo. + 1.63%), 1/18/2035 (n) | 3000000 | &nbsp;&nbsp;&nbsp; 3005931 |
| BBCMS Mortgage Trust, 2021-C10, "XA", 1.206%, 7/15/2054 (i) | 11925168 | &nbsp;&nbsp;&nbsp; 571504 |
| BBCMS Mortgage Trust, 2021-C9, "XA", 1.544%, 2/15/2054 (i) | 7675800 | &nbsp;&nbsp;&nbsp; 466000 |
| Benchmark 2021-B23 Mortgage Trust, "XA", 1.255%, 2/15/2054 (i) | 25052028 | &nbsp;&nbsp;&nbsp; 1117887 |
| Benchmark 2021-B24 Mortgage Trust, "XA", 1.128%, 3/15/2054 (i) | 15314270 | &nbsp;&nbsp;&nbsp; 604491 |
| Benchmark 2021-B27 Mortgage Trust, "XA", 1.232%, 7/15/2054 (i) | 20328867 | &nbsp;&nbsp;&nbsp; 931753 |
| Benchmark 2021-B28 Mortgage Trust, "XA", 1.238%, 8/15/2054 (i) | 24635590 | &nbsp;&nbsp;&nbsp; 1174657 |
| Bridgecrest Lending Auto Securitization Trust, 2025-1, "A2", 4.71%, 9/15/2027  | 228159 | &nbsp;&nbsp;&nbsp; 228221 |
| Commercial Mortgage Pass-Through Certificates, 2021-BN31, "XA", 1.279%, 2/15/2054 (i) | 18833312 | &nbsp;&nbsp;&nbsp; 938601 |
| GreatAmerica Leasing Receivables Funding LLC, 2025-1, "A2", 4.52%, 10/15/2027 (n) | 2310095 | &nbsp;&nbsp;&nbsp; 2317539 |
| JP Morgan Trust, 2026-NQM1, "A1", 4.745%, 6/25/2066 (n) | 1265018 | &nbsp;&nbsp;&nbsp; 1265339 |
| LAD Auto Receivables Trust, 2024-3A, "A2", 4.64%, 11/15/2027 (n) | 211544 | &nbsp;&nbsp;&nbsp; 211638 |
| Morgan Stanley Capital I Trust, 2021-L5, "XA", 1.26%, 5/15/2054 (i) | 10029237 | &nbsp;&nbsp;&nbsp; 431994 |
| Morgan Stanley Capital I Trust, 2021-L6, "XA", 1.14%, 6/15/2054 (i) | 11568035 | &nbsp;&nbsp;&nbsp; 431878 |
| Morgan Stanley Capital I Trust, 2021-L7, "XA", 1.07%, 10/15/2054 (i) | 27071890 | &nbsp;&nbsp;&nbsp; 1034476 |
| Morgan Stanley Residential Mortgage Loan Trust, 2025-NQM3, "A1", 5.53%, 5/25/2070 (n) | 1269854 | &nbsp;&nbsp;&nbsp; 1284914 |
| OBX Trust, 2025-NQM8, "A1", 5.472%, 3/25/2065 (n) | 918424 | &nbsp;&nbsp;&nbsp; 929124 |
| Palmer Square Loan Funding Ltd., 2024-3A, "A2R", FLR, 4.81% (SOFR - 3mo. + 1.15%), 8/08/2032 (n) | 969388 | &nbsp;&nbsp;&nbsp; 969388 |
| Palmer Square Loan Funding, 2025-1A Ltd., "A2", FLR, 5.051% (SOFR - 3mo. + 1.2%), 2/15/2033 (n) | 4300000 | &nbsp;&nbsp;&nbsp; 4300060 |
| Palmer Square Loan Funding, 2025-2A Ltd., "A2", FLR, 5.072% (SOFR - 3mo. + 1.4%), 7/15/2033 (n) | 5700000 | &nbsp;&nbsp;&nbsp; 5703283 |
| PFS Financing Corp., 2025-A, "A", FLR, 4.357% (SOFR - 1mo. + 0.65%), 1/15/2029 (n) | 3476000 | &nbsp;&nbsp;&nbsp; 3480304 |
| PMT Loan Trust, 2025-INV10, "A36", FLR, 5.047% (SOFR - 1mo. + 1.35%), 10/01/2056 (n) | 1658093 | &nbsp;&nbsp;&nbsp; 1664848 |
| PMT Loan Trust, 2026-CNF1, "A26", FLR, 4.889% (SOFR - 1mo. + 1.2%), 1/25/2057 (n) | 1438428 | &nbsp;&nbsp;&nbsp; 1438328 |
| Santander Drive Auto Receivables Trust, 2025-1, "A2", 4.76%, 8/16/2027  | 128579 | &nbsp;&nbsp;&nbsp; 128618 |
| Santander Drive Auto Receivables Trust, 2025-1, "A3", 4.74%, 1/16/2029  | 1200000 | &nbsp;&nbsp;&nbsp; 1202841 |
| SBNA Auto Receivables Trust, 2025-SF1, "B", 5.12%, 3/17/2031 (n) | 99946 | &nbsp;&nbsp;&nbsp; 99980 |
| Shackleton 2019-14A CLO Ltd., "BRR", FLR, 5.217% (SOFR - 3mo. + 1.55%), 7/20/2034 (n) | 3996016 | &nbsp;&nbsp;&nbsp; 3997610 |
| Wells Fargo Commercial Mortgage Trust, 2021-C60, "XA", 1.491%, 8/15/2054 (i) | 9184179 | &nbsp;&nbsp;&nbsp; 542178 |
|  |  | &nbsp;&nbsp;&nbsp; $44757296 |
| Consumer Services – 0.1% | Consumer Services – 0.1% | Consumer Services – 0.1% |
| Conservation Fund, 3.474%, 12/15/2029  | $1438000 | &nbsp;&nbsp;&nbsp; $1379412 |
| Medical & Health Technology & Services – 0.1% | Medical & Health Technology & Services – 0.1% | Medical & Health Technology & Services – 0.1% |
| ProMedica Toledo Hospital, "B", AGM, 5.325%, 11/15/2028  | $2421000 | &nbsp;&nbsp;&nbsp; $2478516 |
| Mortgage-Backed – 5.3% | Mortgage-Backed – 5.3% |  |
| Fannie Mae, 2%, 9/25/2050 (i) | $1036117 | &nbsp;&nbsp;&nbsp; $138063 |
| Fannie Mae, 4%, 9/25/2050 (i) | 2064899 | &nbsp;&nbsp;&nbsp; 396690 |
| Fannie Mae, 2.5%, 2/25/2051 (i) | 1378627 | &nbsp;&nbsp;&nbsp; 197106 |
| Fannie Mae, 5.147%, 11/25/2053  | 1708762 | &nbsp;&nbsp;&nbsp; 1734812 |
| Fannie Mae, 5.697%, 11/25/2053  | 3978774 | &nbsp;&nbsp;&nbsp; 4068564 |
| Fannie Mae, 5.097%, 12/25/2054  | 1146174 | &nbsp;&nbsp;&nbsp; 1158786 |
| Freddie Mac, 0.413%, 5/25/2029 (i) | 25393101 | &nbsp;&nbsp;&nbsp; 335801 |
| Freddie Mac, 1.005%, 7/25/2029 (i) | 28847080 | &nbsp;&nbsp;&nbsp; 761326 |
| Freddie Mac, 0.558%, 1/25/2030 (i) | 7350232 | &nbsp;&nbsp;&nbsp; 154545 |
| Freddie Mac, 1.797%, 4/25/2030 (i) | 3519182 | &nbsp;&nbsp;&nbsp; 234121 |
| Freddie Mac, 1.665%, 5/25/2030 (i) | 6326494 | &nbsp;&nbsp;&nbsp; 406799 |
| Freddie Mac, 1.369%, 6/25/2030 (i) | 9636424 | &nbsp;&nbsp;&nbsp; 474631 |
| Freddie Mac, 1.168%, 9/25/2030 (i) | 3529812 | &nbsp;&nbsp;&nbsp; 170470 |
| Freddie Mac, 0.714%, 12/25/2030 (i) | 1830558 | &nbsp;&nbsp;&nbsp; 53487 |
| Freddie Mac, 0.319%, 1/25/2031 (i) | 29524216 | &nbsp;&nbsp;&nbsp; 362699 |
| Freddie Mac, 0.535%, 1/25/2031 (i) | 54980294 | &nbsp;&nbsp;&nbsp; 1359531 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Bonds – continued  | Bonds – continued  | Bonds – continued  |
| Mortgage-Backed – continued | Mortgage-Backed – continued |  |
| Freddie Mac, 0.779%, 1/25/2031 (i) | $11388256 | &nbsp;&nbsp;&nbsp; $410477 |
| Freddie Mac, 0.935%, 1/25/2031 (i) | 8529316 | &nbsp;&nbsp;&nbsp; 349731 |
| Freddie Mac, 0.509%, 3/25/2031 (i) | 36090532 | &nbsp;&nbsp;&nbsp; 767678 |
| Freddie Mac, 1.213%, 5/25/2031 (i) | 4421663 | &nbsp;&nbsp;&nbsp; 246481 |
| Freddie Mac, 0.938%, 7/25/2031 (i) | 7521262 | &nbsp;&nbsp;&nbsp; 347627 |
| Freddie Mac, 0.536%, 9/25/2031 (i) | 32486236 | &nbsp;&nbsp;&nbsp; 872515 |
| Freddie Mac, 0.854%, 9/25/2031 (i) | 9783880 | &nbsp;&nbsp;&nbsp; 404625 |
| Freddie Mac, 0.348%, 11/25/2031 (i) | 49721062 | &nbsp;&nbsp;&nbsp; 905202 |
| Freddie Mac, 0.495%, 12/25/2031 (i) | 50485813 | &nbsp;&nbsp;&nbsp; 1262827 |
| Freddie Mac, 0.567%, 12/25/2031 (i) | 8215224 | &nbsp;&nbsp;&nbsp; 228827 |
| Freddie Mac, 0.265%, 5/25/2033 (i) | 29100000 | &nbsp;&nbsp;&nbsp; 590887 |
| Freddie Mac, 0.905%, 9/25/2034 (i) | 7419164 | &nbsp;&nbsp;&nbsp; 501515 |
| Freddie Mac, 0.246%, 1/25/2035 (i) | 35704535 | &nbsp;&nbsp;&nbsp; 802602 |
| Freddie Mac, 2.5%, 11/25/2050 - 3/25/2051 (i) | 4978897 | &nbsp;&nbsp;&nbsp; 802111 |
| Freddie Mac, 4.517%, 9/25/2052  | 2675499 | &nbsp;&nbsp;&nbsp; 2667251 |
| Freddie Mac, 3%, 10/25/2052 (i) | 923223 | &nbsp;&nbsp;&nbsp; 151066 |
| Freddie Mac, 4.647%, 2/25/2055  | 3850976 | &nbsp;&nbsp;&nbsp; 3873927 |
| Ginnie Mae, 5.003%, 10/20/2053  | 8241571 | &nbsp;&nbsp;&nbsp; 8315102 |
| Ginnie Mae, 5.053%, 10/20/2053  | 8052763 | &nbsp;&nbsp;&nbsp; 8132036 |
| Ginnie Mae, 4.803%, 11/20/2053  | 6895461 | &nbsp;&nbsp;&nbsp; 6950136 |
| Ginnie Mae, 4.903%, 12/20/2053  | 8162769 | &nbsp;&nbsp;&nbsp; 8222214 |
| Ginnie Mae, 4.653%, 3/20/2054  | 7396387 | &nbsp;&nbsp;&nbsp; 7440562 |
| Ginnie Mae, 4.753%, 10/20/2054  | 1694918 | &nbsp;&nbsp;&nbsp; 1702022 |
| Ginnie Mae, 7.653%, 5/20/2055  | 1455453 | &nbsp;&nbsp;&nbsp; 1482486 |
| Ginnie Mae, 6.02%, 6/20/2055  | 2818804 | &nbsp;&nbsp;&nbsp; 2845720 |
| Ginnie Mae, 6.095%, 6/20/2055  | 2458655 | &nbsp;&nbsp;&nbsp; 2405828 |
| Ginnie Mae, 4.54%, 1/20/2067  | 1229805 | &nbsp;&nbsp;&nbsp; 1239878 |
| Ginnie Mae, 4.153%, 5/20/2067  | 3827956 | &nbsp;&nbsp;&nbsp; 3826310 |
| Ginnie Mae, 4.353%, 8/20/2074  | 1302282 | &nbsp;&nbsp;&nbsp; 1304533 |
|  |  | &nbsp;&nbsp;&nbsp; $81059607 |
| Municipals – 0.0% | Municipals – 0.0% | Municipals – 0.0% |
| Colorado Health Facilities Authority Rev., Taxable (Covenant Living Communities and Services), "B", 2.8%, 12/01/2026  | $380000 | &nbsp;&nbsp;&nbsp; $374020 |
| U.S. Treasury Inflation Protected Securities – 90.8% | U.S. Treasury Inflation Protected Securities – 90.8% | U.S. Treasury Inflation Protected Securities – 90.8% |
| U.S. Treasury Bonds, 3.625%, 4/15/2028  | $68052138 | &nbsp;&nbsp;&nbsp; $71902791 |
| U.S. Treasury Bonds, 1.125%, 1/15/2033  | 77094605 | &nbsp;&nbsp;&nbsp; 74674110 |
| U.S. Treasury Bonds, 1.75%, 1/15/2034  | 115833309 | &nbsp;&nbsp;&nbsp; 116075240 |
| U.S. Treasury Bonds, 0.75%, 2/15/2042  | 106156381 | &nbsp;&nbsp;&nbsp; 82847431 |
| U.S. Treasury Bonds, 0.625%, 2/15/2043  | 37241630 | &nbsp;&nbsp;&nbsp; 27809725 |
| U.S. Treasury Bonds, 0.75%, 2/15/2045  | 54665499 | &nbsp;&nbsp;&nbsp; 39888928 |
| U.S. Treasury Bonds, 1%, 2/15/2048  | 25426488 | &nbsp;&nbsp;&nbsp; 18559114 |
| U.S. Treasury Bonds, 0.125%, 2/15/2052  | 42212784 | &nbsp;&nbsp;&nbsp; 22231364 |
| U.S. Treasury Bonds, 2.125%, 2/15/2054  | 35069913 | &nbsp;&nbsp;&nbsp; 31433186 |
| U.S. Treasury Notes, 0.375%, 7/15/2027  | 17274025 | &nbsp;&nbsp;&nbsp; 17219294 |
| U.S. Treasury Notes, 0.5%, 1/15/2028  | 57909294 | &nbsp;&nbsp;&nbsp; 57430373 |
| U.S. Treasury Notes, 0.75%, 7/15/2028  | 5164920 | &nbsp;&nbsp;&nbsp; 5154752 |
| U.S. Treasury Notes, 0.875%, 1/15/2029 (f) | 115241734 | &nbsp;&nbsp;&nbsp; 114627941 |
| U.S. Treasury Notes, 0.125%, 1/15/2030  | 12272777 | &nbsp;&nbsp;&nbsp; 11773579 |
| U.S. Treasury Notes, 1.625%, 4/15/2030  | 57701133 | &nbsp;&nbsp;&nbsp; 58566397 |
| U.S. Treasury Notes, 0.125%, 7/15/2030  | 148993897 | &nbsp;&nbsp;&nbsp; 142317687 |
| U.S. Treasury Notes, 1.125%, 10/15/2030  | 62125240 | &nbsp;&nbsp;&nbsp; 61829872 |
| U.S. Treasury Notes, 0.125%, 1/15/2031  | 189654877 | &nbsp;&nbsp;&nbsp; 178936744 |
| U.S. Treasury Notes, 0.125%, 1/15/2032 (f) | 104860211 | &nbsp;&nbsp;&nbsp; 96938831 |
| U.S. Treasury Notes, 0.625%, 7/15/2032  | 11713170 | &nbsp;&nbsp;&nbsp; 11101649 |
| U.S. Treasury Notes, 1.375%, 7/15/2033  | 70010043 | &nbsp;&nbsp;&nbsp; 68852388 |
| U.S. Treasury Notes, 1.875%, 7/15/2034  | 40336307 | &nbsp;&nbsp;&nbsp; 40800861 |

---

------

*Portfolio of Investments (unaudited) – continued*

---

| | | |
|:---|:---|:---|
| **Issuer** | **Shares/Par** | **Value ($)** |
| Bonds – continued  | Bonds – continued  | Bonds – continued  |
| U.S. Treasury Inflation Protected Securities – continued | U.S. Treasury Inflation Protected Securities – continued | U.S. Treasury Inflation Protected Securities – continued |
| U.S. Treasury Notes, 1.875%, 1/15/2036  | 44735731 | &nbsp;&nbsp;&nbsp; $44566966 |
|  |  | &nbsp;&nbsp;&nbsp; $1395539223 |
| **Total Bonds**  |  | &nbsp;&nbsp; **$1525588074** |
| Mutual Funds (h) – 1.0%  | Mutual Funds (h) – 1.0%  | Mutual Funds (h) – 1.0%  |
| Money Market Funds – 1.0% | Money Market Funds – 1.0% |  |
| MFS Institutional Money Market Portfolio, 3.73% (v)  | 15244899 | &nbsp;&nbsp;&nbsp; $15247947 |
| Other Assets, Less Liabilities – (0.2)% |  | &nbsp;&nbsp;&nbsp; (3419281)<br>|
| **Net Assets – 100.0%** | **Net Assets – 100.0%** | &nbsp;&nbsp; **$1537416740** |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

&nbsp;&nbsp;&nbsp;&nbsp;(f) All or a portion of the security has been segregated as collateral for open futures
 contracts and cleared swap agreements.

&nbsp;&nbsp;&nbsp;&nbsp;(h) An affiliated issuer, which may be considered one in which the fund owns 5% or more
 of the outstanding voting securities, or a company which is under common control. At period end, the aggregate values of the fund's investments in affiliated
 issuers and in unaffiliated issuers were $15,247,947 and $1,525,588,074, respectively.

&nbsp;&nbsp;&nbsp;&nbsp;(i) Interest only security for which the fund receives interest on notional principal
 (Par amount). Par amount shown is the notional principal and does not reflect the cost of the security.

&nbsp;&nbsp;&nbsp;&nbsp;(n) Securities exempt from registration under Rule 144A of the Securities Act of 1933.
 These securities may be sold in the ordinary course of business in transactions exempt from registration, normally to qualified institutional buyers.
 At period end, the aggregate value of these securities was $34,453,438, representing 2.2% of net assets.

&nbsp;&nbsp;&nbsp;&nbsp;(v) Affiliated issuer that is available only to investment companies managed by MFS. The
 rate quoted for the MFS Institutional Money Market Portfolio is the annualized seven-day yield of the fund at period end.

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | |
|:---|:---|
| The following abbreviations are used in this report and are defined: | The following abbreviations are used in this report and are defined: |
| AGM | Assured Guaranty Municipal |
| CLO | Collateralized Loan Obligation |
| CPI-U | Consumer Price Index - Urban Consumers |
| FLR | Floating Rate. Interest rate resets periodically based on the parenthetically disclosed reference rate plus a spread (if any). The period-end rate <br> reported may not be the current rate. All reference rates are USD unless otherwise noted.<br>|
| SOFR | Secured Overnight Financing Rate |

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **Derivative Contracts at 1/31/26** | **Derivative Contracts at 1/31/26** | **Derivative Contracts at 1/31/26** | **Derivative Contracts at 1/31/26** | **Derivative Contracts at 1/31/26** | **Derivative Contracts at 1/31/26** | **Derivative Contracts at 1/31/26** |
| **Futures Contracts**  | **Futures Contracts**  | **Futures Contracts**  | **Futures Contracts**  | **Futures Contracts**  | **Futures Contracts**  | **Futures Contracts**  |
| **Description** | **Long/** <br>**Short**<br>| **Currency** | **Contracts** | &nbsp;&nbsp; **Notional** <br>**Amount**<br>| &nbsp;&nbsp; **Expiration** <br>**Date**<br>| **Value/Unrealized** <br>**Appreciation** <br>**(Depreciation)**<br>|
| **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** |
| ***Interest Rate Futures***  | ***Interest Rate Futures***  | ***Interest Rate Futures***  | ***Interest Rate Futures***  | ***Interest Rate Futures***  |  |  |
| U.S. Treasury Note 10 yr | &nbsp;&nbsp; Long | &nbsp;&nbsp; USD | &nbsp;&nbsp; 349 | $39028016 | March – 2026 | &nbsp;&nbsp; $4169 |
| U.S. Treasury Ultra Bond 30 yr | &nbsp;&nbsp; Short | &nbsp;&nbsp; USD | &nbsp;&nbsp; 164 | 19259750 | March – 2026 | &nbsp;&nbsp; 74965 |
|  |  |  |  |  |  | &nbsp;&nbsp; $79134 |
| **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** |
| ***Interest Rate Futures***  | ***Interest Rate Futures***  | ***Interest Rate Futures***  | ***Interest Rate Futures***  | ***Interest Rate Futures***  |  |  |
| U.S. Treasury Note 2 yr | &nbsp;&nbsp; Long | &nbsp;&nbsp; USD | &nbsp;&nbsp; 1528 | $318576063 | March – 2026 | &nbsp;&nbsp; $(384023)<br>|
| U.S. Treasury Note 5 yr | &nbsp;&nbsp; Long | &nbsp;&nbsp; USD | &nbsp;&nbsp; 512 | 55772000 | March – 2026 | &nbsp;&nbsp; (63315)<br>|
|  |  |  |  |  |  | &nbsp;&nbsp; $(447338)<br>|

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

------

*Portfolio of Investments (unaudited) – continued*

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Cleared Swap Agreements**  | **Cleared Swap Agreements**  | **Cleared Swap Agreements**  | **Cleared Swap Agreements**  | **Cleared Swap Agreements**  | **Cleared Swap Agreements**  | **Cleared Swap Agreements**  | **Cleared Swap Agreements**  | **Cleared Swap Agreements**  |
| **Maturity** <br>**Date** | **Maturity** <br>**Date** | &nbsp;&nbsp; **Notional** <br>**Amount**<br>| **Counterparty** | &nbsp;&nbsp; **Cash Flows** <br>**to Receive/** <br>**Frequency**<br>| &nbsp;&nbsp; **Cash Flows** <br>**to Pay/** <br>**Frequency**<br>| **Unrealized** <br>**Appreciation** <br>**(Depreciation)**<br>| **Net** <br>**Unamortized** <br>**Upfront** <br>**Payments** <br>**(Receipts)**<br>| **Value** |
| **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** |  |  |  |
| ***Interest Rate Swaps***  | ***Interest Rate Swaps***  | ***Interest Rate Swaps***  | ***Interest Rate Swaps***  | ***Interest Rate Swaps***  | ***Interest Rate Swaps***  |  |  |  |
| 1/14/31 | USD | 46157000  | centrally cleared | 1-day SOFR / Annually  | 3.511% / Annually  | &nbsp;&nbsp; $33781 | &nbsp;&nbsp; $(3065)<br>| &nbsp;&nbsp; $30716 |
| ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  |  |  |  |
| 4/15/26 | USD | 40400000  | centrally cleared | CPI-U / At Maturity  | 2.637% / At Maturity  | &nbsp;&nbsp; $60526 | &nbsp;&nbsp; $— | &nbsp;&nbsp; $60526 |
| 10/14/26 | USD | 84400000  | centrally cleared | 3.170% / At Maturity  | CPI-U / Annually  | &nbsp;&nbsp; 419003 | &nbsp;&nbsp; — | &nbsp;&nbsp; 419003 |
|  |  |  |  |  |  | &nbsp;&nbsp; $479529 | &nbsp;&nbsp; $— | &nbsp;&nbsp; $479529 |
|  |  |  |  |  |  | &nbsp;&nbsp; $513310 | &nbsp;&nbsp; $(3065)<br>| &nbsp;&nbsp; $510245 |
| **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** | **Liability Derivatives** |  |  |  |
| ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  |  |  |  |
| 2/05/27 | USD | 80400000  | centrally cleared | CPI-U / At Maturity  | 2.755% / At Maturity  | &nbsp;&nbsp; $(105345)<br>| &nbsp;&nbsp; $— | &nbsp;&nbsp; $(105345)<br>|
| 10/14/28 | USD | 84400000  | centrally cleared | CPI-U / At Maturity  | 2.740% / Annually  | &nbsp;&nbsp; (452531)<br>| &nbsp;&nbsp; — | &nbsp;&nbsp; (452532)<br>|
|  |  |  |  |  |  | &nbsp;&nbsp; $(557876)<br>| &nbsp;&nbsp; $— | &nbsp;&nbsp; $(557877)<br>|

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|:---|:---|
| **Uncleared Swap Agreements**  | **Uncleared Swap Agreements**  | **Uncleared Swap Agreements**  | **Uncleared Swap Agreements**  | **Uncleared Swap Agreements**  | **Uncleared Swap Agreements**  | **Uncleared Swap Agreements**  | **Uncleared Swap Agreements**  | **Uncleared Swap Agreements**  |
| **Maturity** <br>**Date** | **Maturity** <br>**Date** | &nbsp;&nbsp; **Notional** <br>**Amount**<br>| **Counterparty** | &nbsp;&nbsp; **Cash Flows** <br>**to Receive/** <br>**Frequency**<br>| &nbsp;&nbsp; **Cash Flows** <br>**to Pay/** <br>**Frequency**<br>| **Unrealized** <br>**Appreciation** <br>**(Depreciation)**<br>| **Net** <br>**Unamortized** <br>**Upfront** <br>**Payments** <br>**(Receipts)**<br>| **Value** |
| **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** | **Asset Derivatives** |  |  |  |
| ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  | ***Inflation Swaps***  |  |  |  |
| 3/19/26 | USD | 79900000  | &nbsp;&nbsp; Morgan Stanley Capital <br> Services, Inc.<br>| CPI-U / At Maturity  | 2.482% / Annually  | &nbsp;&nbsp; $464213 | &nbsp;&nbsp; $— | &nbsp;&nbsp; $464213 |

---

At January 31, 2026, the fund had liquid securities collateral with an aggregate value of $6,423,910 to cover any collateral or margin obligations for certain derivative contracts.

See attached supplemental information. For more information see notes to financial statements as disclosed in the most recent semiannual or annual report.

------

**Supplemental Information**

1/31/26 (unaudited)

The fund is an investment company and accordingly follows the investment company accounting and reporting guidance of the Financial

Accounting Standards Board (FASB) Accounting Standards Codification Topic 946 Financial Services - Investment Companies.

**(1) Investment Valuations**

Subject to its oversight, the fund's Board of Trustees has delegated primary responsibility for determining or causing to be determined the value of the fund's investments to MFS as the fund's adviser, pursuant to the fund's valuation policy and procedures which have been adopted by the adviser and approved by the Board. In accordance with Rule 2a-5 under the Investment Company Act of 1940, the Board of Trustees designated the adviser as the "valuation designee" of the fund. If the adviser, as valuation designee, determines that reliable market quotations are not readily available for an investment, the investment is valued at fair value as determined in good faith by the adviser in accordance with the adviser's fair valuation policy and procedures.

Under the fund's valuation policy and procedures, debt instruments and floating rate loans, including restricted debt instruments, are

generally valued at an evaluated or composite bid as provided by a third-party pricing service. Short-term instruments with a maturity at

issuance of 60 days or less may be valued at amortized cost, which approximates market value. Futures contracts are generally valued at last posted settlement price on their primary exchange as provided by a third-party pricing service. Futures contracts for which there were no trades that day for a particular position are generally valued at the closing bid quotation on their primary exchange as provided by a

third-party pricing service. Swap agreements are generally valued using valuations provided by a third-party pricing service, which for cleared

swaps includes an evaluation of any trading activity at the clearinghouses. Open-end investment companies are generally valued at net asset

value per share. The values of foreign securities and other assets and liabilities expressed in foreign currencies are converted to U.S. dollars using the mean of bid and asked prices for rates provided by a third-party pricing service.

Under the fund's valuation policy and procedures, market quotations are not considered to be readily available for debt instruments, floating rate loans, and many types of derivatives. These investments are generally valued at fair value based on information from third-party pricing services or otherwise determined by the adviser in accordance with the adviser's fair valuation policy and procedures. Securities and other assets generally valued on the basis of information from a third-party pricing service may also be valued at a broker/dealer bid quotation. In determining values, third-party pricing services can utilize both transaction data and market information such as yield, quality, coupon rate, maturity, type of issue, trading characteristics, spreads and other market data. Pricing services generally value debt instruments assuming orderly transactions of institutional round lot sizes, but a fund may hold or transact in such securities in smaller, odd lot sizes. In instances where a fund holds an odd lot size position in a debt instrument, such position will typically be valued using the pricing agent's institutional round lot price for the debt instrument. Odd lots may trade at lower prices than institutional round lots, and the fund may receive different prices when it sells odd lot positions than it would receive for sales of institutional round lot positions. An investment may also be valued at fair value if the adviser determines that the investment's value has been materially affected by events occurring after the close of the exchange or market on which the investment is principally traded (such as foreign exchange or market) and prior to the determination of the fund's net asset value, or after the halt of trading of a specific security where trading does not resume prior to the close of the exchange or market on which the security is principally traded. The adviser generally relies on third-party pricing services or other information (such as the correlation with price movements of similar securities in the same or other markets; the type, cost and investment characteristics of the security; the business and financial condition of the issuer; and trading and other market data) to assist in determining whether to fair value and at what value to fair value an investment. The value of an investment for purposes of calculating the fund's net asset value can differ depending on the source and method used to determine value. When fair valuation is used, the value of an investment used to determine the fund's net asset value may differ from quoted or published prices for the same investment. There can be no assurance that the fund could obtain the fair value assigned to an investment if it were to sell the investment at the same time at which the fund determines its net

asset value per share.

Various inputs are used in determining the value of the fund's assets or liabilities. These inputs are categorized into three broad levels. In certain cases, the inputs used to measure fair value may fall into different levels of the fair value hierarchy. In such cases, an investment's level within the fair value hierarchy is based on the lowest level of input that is significant to the fair value measurement. The fund's assessment of the significance of a particular input to the fair value measurement in its entirety requires judgment, and considers factors specific to the investment. Level 1 includes unadjusted quoted prices in active markets for identical assets or liabilities. Level 2 includes other significant observable market-based inputs (including quoted prices for similar securities, interest rates, prepayment speed, and credit risk).

------

*Supplemental Information (unaudited) – continued*

Level 3 includes significant unobservable inputs, which may include the adviser's own assumptions in determining the fair value of investments. Other financial instruments are derivative instruments, such as futures contracts and swap agreements. The following is a summary of the levels used as of January 31, 2026 in valuing the fund's assets and liabilities:

---

| | | | | |
|:---|:---|:---|:---|:---|
| **Financial Instruments** | **Level 1** | **Level 2** | **Level 3** | **Total** |
| U.S. Treasury Bonds & U.S. Government Agencies & Equivalents | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $1395539223 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $1395539223 |
| Municipal Bonds | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 374020 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 374020 |
| U.S. Corporate Bonds | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 3857928 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 3857928 |
| Residential Mortgage-Backed Securities | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 87642160 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 87642160 |
| Commercial Mortgage-Backed Securities | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 11197435 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 11197435 |
| Asset-Backed Securities (including CDOs) | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 26977308 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 26977308 |
| Investment Companies | &nbsp;&nbsp;&nbsp; 15247947 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 15247947 |
| Total | &nbsp;&nbsp;&nbsp; $15247947 | &nbsp;&nbsp;&nbsp; $1525588074 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $1540836021 |
| **Other Financial Instruments** |  |  |  |  |
| Futures Contracts – Assets | &nbsp;&nbsp;&nbsp; $79134 | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $— | &nbsp;&nbsp;&nbsp; $79134 |
| Futures Contracts – Liabilities | &nbsp;&nbsp;&nbsp; (447338)<br>| &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; (447338)<br>|
| Swap Agreements – Assets | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 974458 | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; 974458 |
| Swap Agreements – Liabilities | &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; (557877)<br>| &nbsp;&nbsp;&nbsp; — | &nbsp;&nbsp;&nbsp; (557877)<br>|

---

For further information regarding security characteristics, see the Portfolio of Investments.

**(2) Investments in Affiliated Issuers**

An affiliated issuer may be considered one in which the fund owns 5% or more of the outstanding voting securities, or a company which is under common control. The following were affiliated issuers for the period ended January 31, 2026:

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **Affiliated Issuers** | **Beginning** <br>**Value**<br>| **Purchases** | **Sales** <br>**Proceeds**<br>| **Realized** <br>**Gain** <br>**(Loss)**<br>| **Change in** <br>**Unrealized** <br>**Appreciation or** <br>**Depreciation**<br>| **Ending** <br>**Value**<br>|
| MFS Institutional Money Market Portfolio  | &nbsp;&nbsp; $39079284 | &nbsp;&nbsp; $69306050 | &nbsp;&nbsp; $93130209 | &nbsp;&nbsp; $(6147)<br>| &nbsp;&nbsp; $(1031)<br>| &nbsp;&nbsp; $15247947<br>|

---

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;

---

| | | |
|:---|:---|:---|
| **Affiliated Issuers** | **Dividend** <br>**Income**<br>| **Capital Gain** <br>**Distributions**<br>|
| MFS Institutional Money Market Portfolio  | &nbsp;&nbsp; $219850 | &nbsp;&nbsp; $— |

---

------

## Form NPORT-P: Monthly Portfolio Investments Report

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

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

- **a. Name of Registrant:** MFS SERIES TRUST IX

- **b. Investment Company Act file number:** 811-02464

- **c. CIK number of Registrant:** 0000063075

- **d. LEI of Registrant:** 549300IJONSVWD5I9F62

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

  - **Street Address 1:** 111 HUNTINGTON AVENUE

  - **City:** BOSTON

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02199

  - **Telephone number:** 617-954-5000

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

- **a. Name of Series:** MFS Inflation-Adjusted Bond Fund

- **b. EDGAR series identifier (if any):** S000002493

- **c. LEI of Series:** VOHO802M9IKG3IZTEN75

**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:** $1540545252.43

**Total Liabilities:** $752593.35

**Net Assets:** $1539792659.08

**Cash Not Reported:** $544329.75

**Currency Risk Metrics (dv01):**

- 

**Credit Spread Risk - Investment Grade (dv01):**

- **3-Month:** -181.62000000 | **1-Year:** -4257.91000000 | **5-Year:** -2543.09000000 | **10-Year:** -7.51000000 | **30-Year:** 0.00000000

**Credit Spread Risk - Non-Investment Grade (dv01):**

- **3-Month:** -83.65000000 | **1-Year:** -1141.23000000 | **5-Year:** -1882.67000000 | **10-Year:** -442.49000000 | **30-Year:** -92.09000000

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000006724 | 0.22%                | -0.70%               | 0.44%                |
| Class ID C000006725 | 0.22%                | -0.76%               | 0.44%                |
| Class ID C000006726 | 0.11%                | -0.75%               | 0.33%                |
| Class ID C000006727 | 0.11%                | -0.73%               | 0.34%                |
| Class ID C000006728 | 0.22%                | -0.66%               | 0.44%                |
| Class ID C000006730 | 0.11%                | -0.73%               | 0.34%                |
| Class ID C000006732 | 0.22%                | -0.80%               | 0.45%                |
| Class ID C000006733 | 0.22%                | -0.73%               | 0.44%                |
| Class ID C000126364 | 0.22%                | -0.73%               | 0.55%                |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-2678922.90             | $491185.13                                 |
| Month 2  | $-2919118.25             | $-11969958.56                              |
| Month 3  | $-2075160.21             | $14254678.36                               |

**Designated Index Information**

- **Index Name:** BBG US Treasury Infl Prot Sec Idx

- **Index Identifier:** LBUTTRUU

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| AREIT CRE Trust                                  | AREIT 2022-CRE6 Trust                                                                                                                  | CUSIP: 04002VAC5<br>LEI: N/A                  | Long             | ABS-CBDO         | CORP              | KY        |   2462500 | PA      | $2453256.91   | 0.16%             | 2037-01-20      | Floating      | 5.35%                 | Yes           |                  2 | On Loan: No      |
| ARI Fleet Lease Trust                            | ARI Fleet Lease Trust 2025-A                                                                                                           | CUSIP: 04033CAB2<br>LEI: N/A                  | Long             | ABS-O            | CORP              | US        |   1327528 | PA      | $1331895.05   | 0.09%             | 2034-01-17      | Fixed         | 4.38%                 | Yes           |                  2 | On Loan: No      |
| Barclays Commercial Mortgage Securities LLC      | BBCMS Mortgage Trust 2021-C9                                                                                                           | CUSIP: 05493EAZ5<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |   7675800 | PA      | $466000.10    | 0.03%             | 2054-02-15      | Variable      | 1.54%                 | No            |                  2 | On Loan: No      |
| Barclays Commercial Mortgage Securities LLC      | BBCMS Trust 2021-C10                                                                                                                   | CUSIP: 05551VBK8<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |  11925168 | PA      | $571504.14    | 0.04%             | 2054-07-15      | Variable      | 1.21%                 | No            |                  2 | On Loan: No      |
| Bank                                             | BANK 2021-BNK31                                                                                                                        | CUSIP: 06541ABM1<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |  18833312 | PA      | $938601.42    | 0.06%             | 2054-02-15      | Variable      | 1.28%                 | No            |                  2 | On Loan: No      |
| Babson CLO Ltd                                   | Barings Clo Ltd 2021-III                                                                                                               | CUSIP: 06762TAN1<br>LEI: 549300V1VT2NXKFG0H98 | Long             | ABS-CBDO         | CORP              | KY        |   3000000 | PA      | $3005931.00   | 0.20%             | 2035-01-18      | Floating      | 5.30%                 | Yes           |                  2 | On Loan: No      |
| BENCHMARK Mortgage Trust                         | Benchmark 2021-B23 Mortgage Trust                                                                                                      | CUSIP: 08162RAF4<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |  25052028 | PA      | $1117886.63   | 0.07%             | 2054-02-15      | Variable      | 1.25%                 | No            |                  2 | On Loan: No      |
| BENCHMARK Mortgage Trust                         | Benchmark 2021-B24 Mortgage Trust                                                                                                      | CUSIP: 08163CBE8<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |  15314270 | PA      | $604490.98    | 0.04%             | 2054-03-15      | Variable      | 1.13%                 | No            |                  2 | On Loan: No      |
| BENCHMARK Mortgage Trust                         | Benchmark 2021-B28 Mortgage Trust                                                                                                      | CUSIP: 08163GAZ3<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |  24635590 | PA      | $1174656.97   | 0.08%             | 2054-08-15      | Variable      | 1.24%                 | No            |                  2 | On Loan: No      |
| BENCHMARK Mortgage Trust                         | Benchmark 2021-B27 Mortgage Trust                                                                                                      | CUSIP: 08163HAG3<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |  20328867 | PA      | $931753.28    | 0.06%             | 2054-07-15      | Variable      | 1.23%                 | No            |                  2 | On Loan: No      |
| Bridgecrest Lending Auto Securitization Trust    | Bridgecrest Lending Auto Securitization Trust 2025-1                                                                                   | CUSIP: 10806HAB3<br>LEI: N/A                  | Long             | ABS-O            | CORP              | US        |    228159 | PA      | $228220.78    | 0.01%             | 2027-09-15      | Fixed         | 4.71%                 | No            |                  2 | On Loan: No      |
| Colorado Health Facilities Authority             | COLORADO ST HLTH FACS AUTH REVENUE                                                                                                     | CUSIP: 19648FRX4<br>LEI: 5493002JB6DRFRZPEQ21 | Long             | DBT              | MUN               | US        |    380000 | PA      | $374020.28    | 0.02%             | 2026-12-01      | Fixed         | 2.80%                 | No            |                  2 | On Loan: No      |
| CONSERVATION FUND                                | Conservation Fund A Nonprofit Corp/The                                                                                                 | CUSIP: 20848FAA8<br>LEI: N/A                  | Long             | DBT              | CORP              | US        |   1438000 | PA      | $1379411.71   | 0.09%             | 2029-12-15      | Fixed         | 3.47%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                       | Fannie Mae REMICS                                                                                                                      | CUSIP: 3136BBP30<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |   1036117 | PA      | $138062.55    | 0.01%             | 2050-09-25      | Fixed         | 2.00%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                       | Fannie Mae REMICS                                                                                                                      | CUSIP: 3136BBTT9<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |   2064899 | PA      | $396689.64    | 0.03%             | 2050-09-25      | Fixed         | 4.00%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                       | Fannie Mae REMICS                                                                                                                      | CUSIP: 3136BDV96<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |   1378627 | PA      | $197106.23    | 0.01%             | 2051-02-25      | Fixed         | 2.50%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                       | Fannie Mae REMICS                                                                                                                      | CUSIP: 3136BQRD3<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |   1708762 | PA      | $1734812.38   | 0.11%             | 2053-11-25      | Floating      | 5.15%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                       | Fannie Mae REMICS                                                                                                                      | CUSIP: 3136BQUP2<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |   3978775 | PA      | $4068563.55   | 0.26%             | 2053-11-25      | Floating      | 5.70%                 | No            |                  2 | On Loan: No      |
| Fannie Mae                                       | Fannie Mae REMICS                                                                                                                      | CUSIP: 3136BT7D9<br>LEI: B1V7KEBTPIMZEU4LTD58 | Long             | ABS-MBS          | USGSE             | US        |   1146174 | PA      | $1158785.81   | 0.08%             | 2054-12-25      | Floating      | 5.10%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137F62R7<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   3529812 | PA      | $170470.15    | 0.01%             | 2030-09-25      | Variable      | 1.17%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                      | Freddie Mac REMICS                                                                                                                     | CUSIP: 3137F6JS7<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   2599530 | PA      | $423347.03    | 0.03%             | 2050-11-25      | Fixed         | 2.50%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137F9YZ8<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   1830558 | PA      | $53486.89     | 0.00%             | 2030-12-25      | Variable      | 0.71%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137F9Z38<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   8529316 | PA      | $349730.96    | 0.02%             | 2031-01-25      | Variable      | 0.94%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137F9ZC8<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  11388256 | PA      | $410477.16    | 0.03%             | 2031-01-25      | Variable      | 0.78%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137FTG43<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   3519182 | PA      | $234120.62    | 0.02%             | 2030-04-25      | Variable      | 1.80%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137FUZZ0<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   6326494 | PA      | $406799.26    | 0.03%             | 2030-05-25      | Variable      | 1.67%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137FV5Q1<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   9636424 | PA      | $474631.46    | 0.03%             | 2030-06-25      | Variable      | 1.37%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                      | Freddie Mac REMICS                                                                                                                     | CUSIP: 3137FXSE9<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   2379367 | PA      | $378763.51    | 0.02%             | 2051-03-25      | Fixed         | 2.50%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137FXYZ5<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  54980294 | PA      | $1359530.72   | 0.09%             | 2031-01-25      | Variable      | 0.54%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137FXZ50<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  29524216 | PA      | $362699.09    | 0.02%             | 2031-01-25      | Variable      | 0.32%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137FYUL8<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  36090533 | PA      | $767678.11    | 0.05%             | 2031-03-25      | Variable      | 0.51%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137H13T1<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   4421663 | PA      | $246481.18    | 0.02%             | 2031-05-25      | Variable      | 1.21%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137H2NA8<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   7521262 | PA      | $347626.71    | 0.02%             | 2031-07-25      | Variable      | 0.94%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137H3EZ1<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   9783880 | PA      | $404625.08    | 0.03%             | 2031-09-25      | Variable      | 0.85%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137H4BT6<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  32486236 | PA      | $872515.33    | 0.06%             | 2031-09-25      | Variable      | 0.54%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137H4CH1<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  49721062 | PA      | $905201.77    | 0.06%             | 2031-11-25      | Variable      | 0.35%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137H4SM3<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   8215224 | PA      | $228826.85    | 0.01%             | 2031-12-25      | Variable      | 0.57%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137H5DT1<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  50485813 | PA      | $1262826.88   | 0.08%             | 2031-12-25      | Variable      | 0.50%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                      | Freddie Mac REMICS                                                                                                                     | CUSIP: 3137H9AD1<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   2675499 | PA      | $2667250.75   | 0.17%             | 2052-09-25      | Floating      | 4.52%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137HAAL0<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  29100000 | PA      | $590887.14    | 0.04%             | 2033-05-25      | Variable      | 0.27%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137HDJK7<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  25393101 | PA      | $335800.90    | 0.02%             | 2029-05-25      | Variable      | 0.41%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137HFP33<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  28847080 | PA      | $761326.37    | 0.05%             | 2029-07-25      | Variable      | 1.01%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137HHJ44<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   7419164 | PA      | $501514.71    | 0.03%             | 2034-09-25      | Variable      | 0.91%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                      | Freddie Mac REMICS                                                                                                                     | CUSIP: 3137HJQL4<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   3850976 | PA      | $3873927.48   | 0.25%             | 2055-02-25      | Floating      | 4.65%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | FREMF 2025-K169 Mortgage Trust                                                                                                         | CUSIP: 3137HK2F0<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |  35704535 | PA      | $802602.24    | 0.05%             | 2035-01-25      | Variable      | 0.25%                 | No            |                  2 | On Loan: No      |
| FHLMC Multifamily Structured Pass Through Certs. | Freddie Mac Multifamily Structured Pass Through Certificates                                                                           | CUSIP: 3137HKSB1<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |   7350232 | PA      | $154545.25    | 0.01%             | 2030-01-25      | Variable      | 0.56%                 | No            |                  2 | On Loan: No      |
| Freddie Mac                                      | Freddie Mac REMICS                                                                                                                     | CUSIP: 3137HLJW3<br>LEI: S6XOOCT0IEG5ABCC6L87 | Long             | ABS-MBS          | USGSE             | US        |    923223 | PA      | $151066.16    | 0.01%             | 2052-10-25      | Fixed         | 3.00%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association         | Government National Mortgage Association                                                                                               | CUSIP: 38376RS56<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |   1229805 | PA      | $1239877.52   | 0.08%             | 2067-01-20      | Floating      | 4.54%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association         | Government National Mortgage Association                                                                                               | CUSIP: 38381NMU9<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |   2818804 | PA      | $2845720.04   | 0.18%             | 2055-06-20      | Floating      | 6.02%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association         | Government National Mortgage Association                                                                                               | CUSIP: 38382YLR2<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |   3827956 | PA      | $3826310.44   | 0.25%             | 2067-05-20      | Floating      | 4.15%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association         | Government National Mortgage Association                                                                                               | CUSIP: 38383KU42<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |   1302282 | PA      | $1304533.45   | 0.08%             | 2074-08-20      | Floating      | 4.35%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association         | Government National Mortgage Association                                                                                               | CUSIP: 38384GBV1<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |   6895461 | PA      | $6950135.66   | 0.45%             | 2053-11-20      | Floating      | 4.80%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association         | Government National Mortgage Association                                                                                               | CUSIP: 38384XSB0<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |   1694918 | PA      | $1702021.51   | 0.11%             | 2054-10-20      | Floating      | 4.75%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association         | Government National Mortgage Association                                                                                               | CUSIP: 38385G5H8<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |   2458655 | PA      | $2405828.03   | 0.16%             | 2055-06-20      | Floating      | 6.10%                 | No            |                  2 | On Loan: No      |
| Government National Mortgage Association         | Government National Mortgage Association                                                                                               | CUSIP: 38385GFS3<br>LEI: 549300M8ZYFG0OCMTT87 | Long             | ABS-MBS          | USGA              | US        |   1455453 | PA      | $1482485.68   | 0.10%             | 2055-05-20      | Floating      | 7.65%                 | No            |                  2 | On Loan: No      |
| GREAT AMERICA LEASING RECEIVABLES                | GreatAmerica Leasing Receivables Funding LLC                                                                                           | CUSIP: 39154GAH9<br>LEI: 549300JFP7GIDD4UWO79 | Long             | ABS-O            | CORP              | US        |   2310095 | PA      | $2317538.67   | 0.15%             | 2027-10-15      | Fixed         | 4.52%                 | Yes           |                  2 | On Loan: No      |
| JP Morgan Mortgage Trust                         | JP Morgan Mortgage Trust Series 2026-NQM1                                                                                              | CUSIP: 46660DAE5<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |   1265018 | PA      | $1265339.31   | 0.08%             | 2066-06-25      | Variable      | 4.75%                 | Yes           |                  2 | On Loan: No      |
| LAD Auto Receivables Trust                       | LAD Auto Receivables Trust 2024-3                                                                                                      | CUSIP: 505709AB1<br>LEI: N/A                  | Long             | ABS-O            | CORP              | US        |    211544 | PA      | $211637.89    | 0.01%             | 2027-11-15      | Fixed         | 4.64%                 | Yes           |                  2 | On Loan: No      |
| MFS Institutional Money Market Portfolio         | MFS Institutional Money Market Portfolio                                                                                               | CUSIP: 55291X109<br>LEI: 5L2W638H85N8T1136O07 | Long             | EC               | RF                | US        |  15157264 | NS      | $15160295.51  | 0.98%             |  |  |  | No            |                  1 | On Loan: No      |
| Morgan Stanley Capital I Trust                   | Morgan Stanley Capital I Trust 2021-L5                                                                                                 | CUSIP: 61691YAP6<br>LEI: 3IFG42XD94UUZ7FL2766 | Long             | ABS-MBS          | CORP              | US        |  10029238 | PA      | $431994.36    | 0.03%             | 2054-05-15      | Variable      | 1.26%                 | No            |                  2 | On Loan: No      |
| Morgan Stanley Capital I Trust                   | Morgan Stanley Capital I Trust 2021-L6                                                                                                 | CUSIP: 61692CBK3<br>LEI: 3IFG42XD94UUZ7FL2766 | Long             | ABS-MBS          | CORP              | US        |  11568035 | PA      | $431877.54    | 0.03%             | 2054-06-15      | Variable      | 1.14%                 | No            |                  2 | On Loan: No      |
| Morgan Stanley Capital I Trust                   | Morgan Stanley Capital I Trust 2021-L7                                                                                                 | CUSIP: 61772TBN3<br>LEI: 3IFG42XD94UUZ7FL2766 | Long             | ABS-MBS          | CORP              | US        |  27071890 | PA      | $1034476.46   | 0.07%             | 2054-10-15      | Variable      | 1.07%                 | No            |                  2 | On Loan: No      |
| Morgan Stanley Residential Mortgage Loan Trust   | Morgan Stanley Residential Mortgage Loan Trust 2025-NQM3                                                                               | CUSIP: 61778LAA3<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |   1269854 | PA      | $1284913.85   | 0.08%             | 2070-05-25      | Variable      | 5.53%                 | Yes           |                  2 | On Loan: No      |
| Onslow Bay Financial LLC                         | OBX 2025-NQM8 Trust                                                                                                                    | CUSIP: 67449AAA3<br>LEI: 2549006UJL1L84XG2C80 | Long             | ABS-MBS          | CORP              | US        |    918424 | PA      | $929123.52    | 0.06%             | 2065-03-25      | Variable      | 5.47%                 | Yes           |                  2 | On Loan: No      |
| PFS Financing Corp.                              | PFS Financing Corp                                                                                                                     | CUSIP: 69335PFS9<br>LEI: N/A                  | Long             | ABS-O            | CORP              | US        |   3476000 | PA      | $3480303.64   | 0.23%             | 2029-01-15      | Floating      | 4.36%                 | Yes           |                  2 | On Loan: No      |
| PMT Loan Trust                                   | PMT Loan Trust 2025-INV10                                                                                                              | CUSIP: 69383EBK6<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |   1658093 | PA      | $1664848.19   | 0.11%             | 2056-10-01      | Floating      | 5.05%                 | Yes           |                  2 | On Loan: No      |
| Palmer Square Loan Funding Ltd                   | Palmer Square Loan Funding 2025-2 Ltd                                                                                                  | CUSIP: 69704AAC5<br>LEI: N/A                  | Long             | ABS-CBDO         | CORP              | KY        |   5700000 | PA      | $5703283.20   | 0.37%             | 2033-07-15      | Floating      | 5.07%                 | Yes           |                  2 | On Loan: No      |
| Palmer Square Loan Funding Ltd                   | Palmer Square Loan Funding 2025-1 Ltd                                                                                                  | CUSIP: 69704CAC1<br>LEI: N/A                  | Long             | ABS-CBDO         | CORP              | KY        |   4300000 | PA      | $4300060.20   | 0.28%             | 2033-02-15      | Floating      | 5.05%                 | Yes           |                  2 | On Loan: No      |
| PMT Loan Trust                                   | PMT Loan Trust 2026-CNF1                                                                                                               | CUSIP: 729920BE7<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |   1438428 | PA      | $1438327.60   | 0.09%             | 2057-01-25      | Floating      | 4.89%                 | Yes           |                  2 | On Loan: No      |
| SBNA Auto Receivables Trust                      | SBNA Auto Receivables Trust 2025-SF1                                                                                                   | CUSIP: 78437XAB2<br>LEI: N/A                  | Long             | ABS-O            | CORP              | US        |     99946 | PA      | $99980.03     | 0.01%             | 2031-03-17      | Fixed         | 5.12%                 | Yes           |                  2 | On Loan: No      |
| Santander Drive Auto Receivables Trust           | Santander Drive Auto Receivables Trust 2025-1                                                                                          | CUSIP: 80288DAB2<br>LEI: N/A                  | Long             | ABS-O            | CORP              | US        |    128579 | PA      | $128617.71    | 0.01%             | 2027-08-16      | Fixed         | 4.76%                 | No            |                  2 | On Loan: No      |
| Santander Drive Auto Receivables Trust           | Santander Drive Auto Receivables Trust 2025-1                                                                                          | CUSIP: 80288DAC0<br>LEI: N/A                  | Long             | ABS-O            | CORP              | US        |   1200000 | PA      | $1202841.12   | 0.08%             | 2029-01-16      | Fixed         | 4.74%                 | No            |                  2 | On Loan: No      |
| Shackleton CLO LTD                               | Shackleton 2019-XIV Clo Ltd                                                                                                            | CUSIP: 81880XAY8<br>LEI: 549300HOHPZON6E4VH77 | Long             | ABS-CBDO         | CORP              | KY        |   3996016 | PA      | $3997610.41   | 0.26%             | 2034-07-20      | Floating      | 5.22%                 | Yes           |                  2 | On Loan: No      |
| 3650R Commercial Mortgage Trust                  | 3650R 2021-PF1 Commercial Mortgage Trust                                                                                               | CUSIP: 88581EAF8<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |  14376349 | PA      | $498758.69    | 0.03%             | 2054-11-15      | Variable      | 0.99%                 | No            |                  2 | On Loan: No      |
| TOLEDO HOSPITAL/THE                              | Toledo Hospital/The                                                                                                                    | CUSIP: 889184AF4<br>LEI: 5493009DCR7NWV6K4T34 | Long             | DBT              | CORP              | US        |   2421000 | PA      | $2478516.25   | 0.16%             | 2028-11-15      | Fixed         | 5.33%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Bonds                                                                                                  | CUSIP: 912810FD5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  68052138 | PA      | $71902790.70  | 4.67%             | 2028-04-15      | Fixed         | 3.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Bonds                                                                                                  | CUSIP: 912810QV3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 106156381 | PA      | $82847431.12  | 5.38%             | 2042-02-15      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Bonds                                                                                                  | CUSIP: 912810RA8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  37241630 | PA      | $27809725.35  | 1.81%             | 2043-02-15      | Fixed         | 0.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Bonds                                                                                                  | CUSIP: 912810RL4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  54665500 | PA      | $39888927.96  | 2.59%             | 2045-02-15      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Bonds                                                                                                  | CUSIP: 912810SB5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  25426488 | PA      | $18559114.47  | 1.21%             | 2048-02-15      | Fixed         | 1.00%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Bonds                                                                                                  | CUSIP: 912810TE8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  42212784 | PA      | $22231364.04  | 1.44%             | 2052-02-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Bonds                                                                                                  | CUSIP: 912810TY4<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  35069913 | PA      | $31433186.25  | 2.04%             | 2054-02-15      | Fixed         | 2.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 9128282L3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  90149025 | PA      | $89863398.63  | 5.84%             | 2027-07-15      | Fixed         | 0.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 9128283R9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  57909294 | PA      | $57430372.56  | 3.73%             | 2028-01-15      | Fixed         | 0.50%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 9128285W6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 115241734 | PA      | $114627940.53 | 7.44%             | 2029-01-15      | Fixed         | 0.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 912828Y38<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |   5164920 | PA      | $5154752.44   | 0.33%             | 2028-07-15      | Fixed         | 0.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 912828Z37<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  12272777 | PA      | $11773578.74  | 0.76%             | 2030-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 912828ZZ6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 148993898 | PA      | $142317686.66 | 9.24%             | 2030-07-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 91282CBF7<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 189654877 | PA      | $178936744.13 | 11.62%            | 2031-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 91282CDX6<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 104860211 | PA      | $96938831.39  | 6.30%             | 2032-01-15      | Fixed         | 0.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 91282CEZ0<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  11713170 | PA      | $11101648.70  | 0.72%             | 2032-07-15      | Fixed         | 0.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 91282CGK1<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  77094605 | PA      | $74674109.87  | 4.85%             | 2033-01-15      | Fixed         | 1.13%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 91282CHP9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  70010043 | PA      | $68852387.94  | 4.47%             | 2033-07-15      | Fixed         | 1.38%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 91282CJY8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        | 115833309 | PA      | $116075239.71 | 7.54%             | 2034-01-15      | Fixed         | 1.75%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 91282CLE9<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  40336307 | PA      | $40800861.05  | 2.65%             | 2034-07-15      | Fixed         | 1.88%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 91282CNB3<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  57701133 | PA      | $58566397.02  | 3.80%             | 2030-04-15      | Fixed         | 1.63%                 | No            |                  2 | On Loan: No      |
| United States Treasury                           | U.S. Treasury Inflation-Indexed Notes                                                                                                  | CUSIP: 91282CPH8<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  62125240 | PA      | $61829872.38  | 4.02%             | 2030-10-15      | Fixed         | 1.13%                 | No            |                  2 | On Loan: No      |
| Wells Fargo Commercial Mortgage Trust            | Wells Fargo Commercial Mortgage Trust 2021-C60                                                                                         | CUSIP: 95003DBP2<br>LEI: N/A                  | Long             | ABS-MBS          | CORP              | US        |   9184179 | PA      | $542177.90    | 0.04%             | 2054-08-15      | Variable      | 1.49%                 | No            |                  2 | On Loan: No      |
| Morgan Stanley & Co. LLC                         | Long: SM11576   IRS USD R V 12MUSCPI SM11576_FLO INFLATIONZERO / Short: SM11576   IRS USD P F  2.48200 SM11576_FIX INFLATIONZERO       | CUSIP: 000000000<br>LEI: 9R7GPTSO7KV3UQJZQ078 | N/A              | DIR              |  | US        |  79900000 | OU      | $464213.41    | 0.03%             |  |  |  | No            |                  2 | On Loan: No      |
| LCH Ltd.                                         | Long: BM11591   IRS USD R V 12MUSCPI SM11591_FLO CCPINFLATIONZERO / Short: BM11591   IRS USD P F  2.63650 SM11591_FIX CCPINFLATIONZERO | CUSIP: 000000000<br>LEI: F226TOH6YD6XJB17KS62 | N/A              | DIR              |  | US        |  40400000 | OU      | $60526.07     | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| LCH Ltd.                                         | Long: BM11746   IRS USD R V 12MUSCPI SM11746_FLO CCPINFLATIONZERO / Short: BM11746   IRS USD P F  2.75500 SM11746_FIX CCPINFLATIONZERO | CUSIP: 000000000<br>LEI: F226TOH6YD6XJB17KS62 | N/A              | DIR              |  | US        |  80400000 | OU      | $-105344.90   | -0.01%            |  |  |  | No            |                  2 | On Loan: No      |
| LCH Ltd.                                         | Long: BM11926   IRS USD R V 12MUSCPI SM11926_FLO CCPINFLATIONZERO / Short: BM11926   IRS USD P F  2.74000 SM11926_FIX CCPINFLATIONZERO | CUSIP: 000000000<br>LEI: F226TOH6YD6XJB17KS62 | N/A              | DIR              |  | US        |  84400000 | OU      | $-452531.70   | -0.03%            |  |  |  | No            |                  2 | On Loan: No      |
| LCH Ltd.                                         | Long: SM11925   IRS USD R F  3.17000 SM11925_FIX CCPINFLATIONZERO / Short: SM11925   IRS USD P V 12MUSCPI SM11925_FLO CCPINFLATIONZERO | CUSIP: 000000000<br>LEI: F226TOH6YD6XJB17KS62 | N/A              | DIR              |  | US        |  84400000 | OU      | $419002.96    | 0.03%             |  |  |  | No            |                  2 | On Loan: No      |
| LCH Ltd.                                         | Long: BM11994   IRS USD R V 00MSOFR SM11994_FLO CCPOIS / Short: BM11994   IRS USD P F  3.51050 SM11994_FIX CCPOIS                      | CUSIP: 000000000<br>LEI: F226TOH6YD6XJB17KS62 | N/A              | DIR              |  | US        |  46157000 | OU      | $30715.64     | 0.00%             |  |  |  | No            |                  2 | On Loan: No      |
| Chicago Board of Trade                           | US 10YR NOTE (CBT)MAR26                                                                                                                | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |       349 | NC      | $4168.81      | 0.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                           | US ULTRA BOND CBT MAR26                                                                                                                | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |      -164 | NC      | $74965.63     | 0.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                           | US 5YR NOTE (CBT) MAR26                                                                                                                | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |       512 | NC      | $-63314.67    | -0.00%            |  |  |  | No            |                  1 | On Loan: No      |
| Chicago Board of Trade                           | US 2YR NOTE (CBT) MAR26                                                                                                                | CUSIP: 000000000<br>LEI: 549300EX04Q2QBFQTQ27 | N/A              | DIR              |  | US        |      1528 | NC      | $-384023.52   | -0.02%            |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-02-27

**Name of Applicant:** MFS SERIES TRUST IX

**Signature:** James Byrne

**Name of Signer:** James Byrne

**Title:** Assistant Treasurer