# EDGAR Filing Document

**Accession Number:** 0001174520
**File Stem:** 0001752724-23-038328
**Filing Date:** 2023-2
**Character Count:** 29288
**Document Hash:** 22af607cdbf146a67af909c33e8aecb0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-23-038328.hdr.sgml**: 20230224

**ACCESSION NUMBER**: 0001752724-23-038328

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20221230

**FILED AS OF DATE**: 20230224

**DATE AS OF CHANGE**: 20230224

**PERIOD START**: 20230331

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PIONEER SERIES TRUST X
- **CENTRAL INDEX KEY:** 0001174520
- **IRS NUMBER:** 030460956
- **FISCAL YEAR END:** 0331

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-21108
- **FILM NUMBER:** 23664188

**BUSINESS ADDRESS:**
- **STREET 1:** 60 STATE STREET
- **STREET 2:** 5TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109
- **BUSINESS PHONE:** 617-742-7825

**MAIL ADDRESS:**
- **STREET 1:** 60 STATE STREET
- **STREET 2:** 5TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PIONEER FUNDAMENTAL GROWTH FUND
- **DATE OF NAME CHANGE:** 20051213

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PIONEER LARGE CAP GROWTH FUND
- **DATE OF NAME CHANGE:** 20020530

## Series and Classes Contracts Data

### Pioneer Fundamental Growth Fund (Series ID: S000004137)

| Class ID   | Class Name                               | Ticker Symbol   |
|:---|:---|:---|
| C000011600 | Pioneer Fundamental Growth Fund: Class A | PIGFX           |
| C000011602 | Pioneer Fundamental Growth Fund: Class C | FUNCX           |
| C000075918 | Pioneer Fundamental Growth Fund: Class Y | FUNYX           |
| C000115405 | Pioneer Fundamental Growth Fund: Class R | PFGRX           |
| C000121111 | Pioneer Fundamental Growth Fund: Class K | PFGKX           |

## Nport-Ex

## Pioneer Fundamental Growth Fund
Schedule of Investments \| December 31, 2022

---

| | | | | |
|:---|:---|:---|:---|:---|
| **A: PIGFX** | **C: FUNCX** | **K: PFGKX** | **R: PFGRX** | **Y: FUNYX** |

---

------

### Schedule of Investments \| 12/31/22
(unaudited)

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Shares** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**UNAFFILIATED ISSUERS — 100.2%** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Common Stocks — 99.0% of Net Assets** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Beverages — 3.3%** |  |
| 925257 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PepsiCo., Inc. | $167156930 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Beverages** | &nbsp;&nbsp; **$** **167156930** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Capital Markets — 8.4%** |  |
| 2701469 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Charles Schwab Corp. | $224924309 |
| 180196 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;FactSet Research Systems, Inc. | &nbsp;&nbsp; 72296437 |
| 1230807 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Intercontinental Exchange, Inc. | &nbsp;&nbsp; 126268490 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Capital Markets** | &nbsp;&nbsp; **$** **423489236** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Commercial Services & Supplies — 0.8%** |  |
| 690,368(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Copart, Inc. | $42036508 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Commercial Services & Supplies** | &nbsp;&nbsp;&nbsp;&nbsp; **$** **42036508** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Communications Equipment — 2.4%** |  |
| 463508 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Motorola Solutions, Inc. | $119450647 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Communications Equipment** | &nbsp;&nbsp; **$** **119450647** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Electrical Equipment — 2.1%** |  |
| 400974 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Eaton Corp. Plc | $62932869 |
| 171528 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Rockwell Automation, Inc. | &nbsp;&nbsp; 44180467 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Electrical Equipment** | &nbsp;&nbsp; **$** **107113336** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Electronic Equipment, Instruments & Components<br> — 6.2%** |  |
| 2220213 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Amphenol Corp., Class A | $169047018 |
| 820552 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;CDW Corp. | &nbsp;&nbsp; 146534176 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Electronic Equipment, Instruments & Components** | &nbsp;&nbsp; **$** **315581194** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Energy Equipment & Services — 3.0%** |  |
| 2824969 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Schlumberger, Ltd. | $151022843 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Energy Equipment & Services** | &nbsp;&nbsp; **$** **151022843** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Entertainment — 1.6%** |  |
| 682833 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Electronic Arts, Inc. | $83428536 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Entertainment** | &nbsp;&nbsp;&nbsp;&nbsp; **$** **83428536** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Health Care Equipment & Supplies — 3.1%** |  |
| 1,260,712(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Edwards Lifesciences Corp. | $94061722 |
| 241,403(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Intuitive Surgical, Inc. | &nbsp;&nbsp; 64056286 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Health Care Equipment & Supplies** | &nbsp;&nbsp; **$** **158118008** |

---

1Pioneer Fundamental Growth Fund \| \| 12/31/22

------

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Shares** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Hotels, Restaurants & Leisure — 3.4%** |  |
| 58,310(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Booking Holdings, Inc. | $117510977 |
| 444667 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Hilton Worldwide Holdings, Inc. | &nbsp;&nbsp; 56188122 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Hotels, Restaurants & Leisure** | &nbsp;&nbsp; **$** **173699099** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Insurance — 2.9%** |  |
| 1125783 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Progressive Corp. | $146025313 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Insurance** | &nbsp;&nbsp; **$** **146025313** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Interactive Media & Services — 5.9%** |  |
| 3,386,735(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Alphabet, Inc., Class C | $300504996 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Interactive Media & Services** | &nbsp;&nbsp; **$** **300504996** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Internet & Direct Marketing Retail — 3.9%** |  |
| 2,333,042(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Amazon.com, Inc. | $195975528 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Internet & Direct Marketing Retail** | &nbsp;&nbsp; **$** **195975528** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**IT Services — 9.5%** |  |
| 744964 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Mastercard, Inc., Class A | $259046332 |
| 1,064,411(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;PayPal Holdings, Inc. | &nbsp;&nbsp; 75807352 |
| 693536 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Visa, Inc., Class A | &nbsp;&nbsp; 144089039 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total IT Services** | &nbsp;&nbsp; **$** **478942723** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Life Sciences Tools & Services — 6.2%** |  |
| 460366 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Danaher Corp. | $122190344 |
| 345979 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Thermo Fisher Scientific, Inc. | &nbsp;&nbsp; 190527175 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Life Sciences Tools & Services** | &nbsp;&nbsp; **$** **312717519** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Machinery — 1.5%** |  |
| 346936 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Illinois Tool Works, Inc. | $76430001 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Machinery** | &nbsp;&nbsp;&nbsp;&nbsp; **$** **76430001** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Pharmaceuticals — 5.5%** |  |
| 552179 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Eli Lilly & Co. | $202009165 |
| 1483706 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Pfizer, Inc. | &nbsp;&nbsp; 76025096 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Pharmaceuticals** | &nbsp;&nbsp; **$** **278034261** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Professional Services — 1.6%** |  |
| 446091 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Verisk Analytics, Inc. | $78699374 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Professional Services** | &nbsp;&nbsp;&nbsp;&nbsp; **$** **78699374** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Semiconductors & Semiconductor Equipment —<br> 5.7%** |  |
| 1,016,852(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Advanced Micro Devices, Inc. | $65861504 |
| 377586 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;NVIDIA Corp. | &nbsp;&nbsp; 55180418 |
| 1548032 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;QUALCOMM, Inc. | &nbsp;&nbsp; 170190638 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Semiconductors & Semiconductor Equipment** | &nbsp;&nbsp; **$** **291232560** |

---

Pioneer Fundamental Growth Fund \| \| 12/31/222

------

(unaudited) (continued)

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;**Shares** |  | **Value** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Software — 10.7%** |  |
| 283,762(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Adobe, Inc. | $95494426 |
| 1534566 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Microsoft Corp. | &nbsp;&nbsp; 368019618 |
| 591,255(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Salesforce, Inc. | &nbsp;&nbsp; 78394500 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Software** | &nbsp;&nbsp;&nbsp; **$** **541908544** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Specialty Retail — 7.3%** |  |
| 148,876(a) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;O'Reilly Automotive, Inc. | $125655810 |
| 1085111 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Ross Stores, Inc. | &nbsp;&nbsp; 125948834 |
| 1480402 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;TJX Cos., Inc. | &nbsp;&nbsp; 117839999 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Specialty Retail** | &nbsp;&nbsp;&nbsp; **$** **369444643** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Technology Hardware, Storage & Peripherals —<br> 4.0%** |  |
| 1564237 | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Apple, Inc. | $203241313 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Technology Hardware, Storage & Peripherals** | &nbsp;&nbsp;&nbsp; **$** **203241313** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Total Common Stocks<br> (Cost $2,795,418,811)** | **$5014253112** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**SHORT TERM INVESTMENTS — 1.2% of Net<br> Assets** |  |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**Open-End Fund — 1.2%** |  |
| 62,015,694(b) | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Dreyfus Government Cash Management,<br> Institutional Shares, 4.19% | $62015694 |
|  |  | &nbsp;&nbsp;&nbsp;&nbsp; $62015694 |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**TOTAL SHORT TERM INVESTMENTS<br> (Cost $62,015,694)** | &nbsp;&nbsp;&nbsp;&nbsp; **$** **62015694** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**TOTAL INVESTMENTS IN UNAFFILIATED ISSUERS — 100.2%<br> (Cost $2,857,434,505)** | **$5076268806** |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**OTHER ASSETS AND LIABILITIES — (0.2)%** | &nbsp;&nbsp;&nbsp; $(11817229) |
|  | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;**net assets — 100.0%** | **$5064451577** |

---

(a) Non-income producing security.

(b) Rate periodically changes. Rate disclosed is the 7-day yield at December 31, 2022.

3Pioneer Fundamental Growth Fund \| \| 12/31/22

------

Various inputs are used in determining the value of the Fund's investments. These inputs are summarized in the three broad levels below.

---

| |
|:---|
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Level 1 – unadjusted quoted prices in active markets for identical securities. |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Level 2 – other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.). |
| &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Level 3 – significant unobservable inputs (including the Adviser's own assumptions in determining fair value of investments). |

---

The following is a summary of the inputs used as of December 31, 2022, in valuing the Fund's investments:

---

| | | | | |
|:---|:---|:---|:---|:---|
|  | **Level 1** | &nbsp;&nbsp;**Level 2** | &nbsp;&nbsp;**Level 3** | &nbsp;&nbsp;**Total** |
| Common Stocks | $5014253112 | &nbsp;&nbsp;$— | &nbsp;&nbsp;$— | &nbsp;&nbsp;$5014253112 |
| Open-End Fund | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;62015694 | &nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;— | &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;62015694 |
| **Total Investments in Securities** | **$5076268806** | &nbsp;&nbsp;**$—** | &nbsp;&nbsp;**$—** | &nbsp;&nbsp;**$5076268806** |

---

During the period ended December 31, 2022, there were no transfers in or out of Level 3.

Pioneer Fundamental Growth Fund \| \| 12/31/224

## Form NPORT-P: Monthly Portfolio Investments Report

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

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

- **a. Name of Registrant:** Pioneer Series Trust X

- **b. Investment Company Act file number:** 811-21108

- **c. CIK number of Registrant:** 0001174520

- **d. LEI of Registrant:** 549300OT70Y6XDA91822

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

  - **Street Address 1:** 60 State Street

  - **City:** Boston

  - **State:** MA

  - **Foreign country:** US

  - **Zip / Postal Code:** 02109

  - **Telephone number:** 617-422-4947

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

- **a. Name of Series:** Pioneer Fundamental Growth Fund

- **b. EDGAR series identifier (if any):** S000004137

- **c. LEI of Series:** 549300YST2IRKGKOMC34

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

- **a. Date of fiscal year-end:** 2023-03-31

- **b. Date as of which information is reported:** 2022-12-30

**Item A.4. Final filing**

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

### Fund Information

**Total Assets:** $5125924492.42

**Total Liabilities:** $49558865.57

**Net Assets:** $5076365626.85

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000121111 | 7.94%                | 5.94%                | -5.61%               |
| Class ID C000011602 | 7.86%                | 5.87%                | -5.69%               |
| Class ID C000075918 | 7.94%                | 5.96%                | -5.66%               |
| Class ID C000115405 | 7.87%                | 5.89%                | -5.69%               |
| Class ID C000011600 | 7.91%                | 5.94%                | -5.69%               |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $-76007434.46            | $462571724.72                              |
| Month 2  | $7613116.73              | $291213783.42                              |
| Month 3  | $15289935.56             | $-318756052.72                             |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Electronic Arts Inc                | Electronic Arts Inc                | CUSIP: 285512109<br>LEI: 549300O7A67PUEYKDL45 | Long             | EC               | CORP              | US        |    682833 | NS      | $83428535.94  | 1.64%             |  |  |  | No            |                  1 | On Loan: No      |
| Intercontinental Exchange Inc      | Intercontinental Exchange Inc      | CUSIP: 45866F104<br>LEI: 5493000F4ZO33MV32P92 | Long             | EC               | CORP              | US        |   1230807 | NS      | $126268490.13 | 2.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Apple Inc                          | Apple Inc                          | CUSIP: 037833100<br>LEI: HWUPKR0MPOU8FGXBT394 | Long             | EC               | CORP              | US        |   1564237 | NS      | $203241313.41 | 4.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Eaton Corp PLC                     | Eaton Corp PLC                     | CUSIP: 000000000<br>LEI: 549300VDIGTMXUNT7H71 | Long             | EC               | CORP              | US        |    400974 | NS      | $62932869.30  | 1.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Thermo Fisher Scientific Inc       | Thermo Fisher Scientific Inc       | CUSIP: 883556102<br>LEI: HCHV7422L5HDJZCRFL38 | Long             | EC               | CORP              | US        |    345979 | NS      | $190527175.51 | 3.75%             |  |  |  | No            |                  1 | On Loan: No      |
| QUALCOMM Inc                       | QUALCOMM Inc                       | CUSIP: 747525103<br>LEI: H1J8DDZKZP6H7RWC0H53 | Long             | EC               | CORP              | US        |   1548032 | NS      | $170190638.08 | 3.35%             |  |  |  | No            |                  1 | On Loan: No      |
| O'Reilly Automotive Inc            | O'Reilly Automotive Inc            | CUSIP: 67103H107<br>LEI: 549300K2RLMQL149Q332 | Long             | EC               | CORP              | US        |    148876 | NS      | $125655810.28 | 2.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Alphabet Inc                       | Alphabet Inc                       | CUSIP: 02079K107<br>LEI: 5493006MHB84DD0ZWV18 | Long             | EC               | CORP              | US        |   3386735 | NS      | $300504996.55 | 5.92%             |  |  |  | No            |                  1 | On Loan: No      |
| FactSet Research Systems Inc       | FactSet Research Systems Inc       | CUSIP: 303075105<br>LEI: 549300ZSJE7NBK6K9P30 | Long             | EC               | CORP              | US        |    180196 | NS      | $72296437.16  | 1.42%             |  |  |  | No            |                  1 | On Loan: No      |
| Progressive Corp/The               | Progressive Corp/The               | CUSIP: 743315103<br>LEI: 529900TACNVLY9DCR586 | Long             | EC               | CORP              | US        |   1125783 | NS      | $146025312.93 | 2.88%             |  |  |  | No            |                  1 | On Loan: No      |
| Advanced Micro Devices Inc         | Advanced Micro Devices Inc         | CUSIP: 007903107<br>LEI: R2I72C950HOYXII45366 | Long             | EC               | CORP              | US        |   1016852 | NS      | $65861504.04  | 1.30%             |  |  |  | No            |                  1 | On Loan: No      |
| Booking Holdings Inc               | Booking Holdings Inc               | CUSIP: 09857L108<br>LEI: FXM8FAOHMYDIPD38UZ17 | Long             | EC               | CORP              | US        |     58310 | NS      | $117510976.80 | 2.31%             |  |  |  | No            |                  1 | On Loan: No      |
| Hilton Worldwide Holdings Inc      | Hilton Worldwide Holdings Inc      | CUSIP: 43300A203<br>LEI: 549300HVGPK36ICB0B89 | Long             | EC               | CORP              | US        |    444667 | NS      | $56188122.12  | 1.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Ross Stores Inc                    | Ross Stores Inc                    | CUSIP: 778296103<br>LEI: 549300ENZFLPGRDFZQ60 | Long             | EC               | CORP              | US        |   1085111 | NS      | $125948833.77 | 2.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Mastercard Inc                     | Mastercard Inc                     | CUSIP: 57636Q104<br>LEI: AR5L2ODV9HN37376R084 | Long             | EC               | CORP              | US        |    744964 | NS      | $259046331.72 | 5.10%             |  |  |  | No            |                  1 | On Loan: No      |
| NVIDIA Corp                        | NVIDIA Corp                        | CUSIP: 67066G104<br>LEI: 549300S4KLFTLO7GSQ80 | Long             | EC               | CORP              | US        |    377586 | NS      | $55180418.04  | 1.09%             |  |  |  | No            |                  1 | On Loan: No      |
| Amazon.com Inc                     | Amazon.com Inc                     | CUSIP: 023135106<br>LEI: ZXTILKJKG63JELOEG630 | Long             | EC               | CORP              | US        |   2333042 | NS      | $195975528.00 | 3.86%             |  |  |  | No            |                  1 | On Loan: No      |
| Adobe Inc                          | Adobe Inc                          | CUSIP: 00724F101<br>LEI: FU4LY2G4933NH2E1CP29 | Long             | EC               | CORP              | US        |    283762 | NS      | $95494425.86  | 1.88%             |  |  |  | No            |                  1 | On Loan: No      |
| Microsoft Corp                     | Microsoft Corp                     | CUSIP: 594918104<br>LEI: INR2EJN1ERAN0W5ZP974 | Long             | EC               | CORP              | US        |   1534566 | NS      | $368019618.12 | 7.25%             |  |  |  | No            |                  1 | On Loan: No      |
| Charles Schwab Corp/The            | Charles Schwab Corp/The            | CUSIP: 808513105<br>LEI: 549300VSGCJ7E698NM85 | Long             | EC               | CORP              | US        |   2701469 | NS      | $224924308.94 | 4.43%             |  |  |  | No            |                  1 | On Loan: No      |
| Copart Inc                         | Copart Inc                         | CUSIP: 217204106<br>LEI: 549300KVYX3JWMYEHU61 | Long             | EC               | CORP              | US        |    690368 | NS      | $42036507.52  | 0.83%             |  |  |  | No            |                  1 | On Loan: No      |
| PayPal Holdings Inc                | PayPal Holdings Inc                | CUSIP: 70450Y103<br>LEI: 5493005X2GO78EFZ3E94 | Long             | EC               | CORP              | US        |   1064411 | NS      | $75807351.42  | 1.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Salesforce Inc                     | Salesforce Inc                     | CUSIP: 79466L302<br>LEI: RCGZFPDMRW58VJ54VR07 | Long             | EC               | CORP              | US        |    591255 | NS      | $78394500.45  | 1.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Amphenol Corp                      | Amphenol Corp                      | CUSIP: 032095101<br>LEI: 549300D3L3G0R4U4VT04 | Long             | EC               | CORP              | US        |   2220213 | NS      | $169047017.82 | 3.33%             |  |  |  | No            |                  1 | On Loan: No      |
| Visa Inc                           | Visa Inc                           | CUSIP: 92826C839<br>LEI: 549300JZ4OKEHW3DPJ59 | Long             | EC               | CORP              | US        |    693536 | NS      | $144089039.36 | 2.84%             |  |  |  | No            |                  1 | On Loan: No      |
| CDW Corp/DE                        | CDW Corp/DE                        | CUSIP: 12514G108<br>LEI: 9845001B052ABF0B6755 | Long             | EC               | CORP              | US        |    820552 | NS      | $146534176.16 | 2.89%             |  |  |  | No            |                  1 | On Loan: No      |
| Danaher Corp                       | Danaher Corp                       | CUSIP: 235851102<br>LEI: S4BKK9OTCEWQ3YHPFM11 | Long             | EC               | CORP              | US        |    460366 | NS      | $122190343.72 | 2.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Dreyfus Government Cash Management | Dreyfus Government Cash Management | CUSIP: 262006208<br>LEI: 5493000Q69I5Q3QZIA91 | Long             | STIV             | RF                | US        |  82653037 | NS      | $82653037.24  | 1.63%             |  |  |  | No            |                  1 | On Loan: No      |
| Pfizer Inc                         | Pfizer Inc                         | CUSIP: 717081103<br>LEI: 765LHXWGK1KXCLTFYQ30 | Long             | EC               | CORP              | US        |   1483706 | NS      | $76025095.44  | 1.50%             |  |  |  | No            |                  1 | On Loan: No      |
| Schlumberger Ltd                   | Schlumberger Ltd                   | CUSIP: 806857108<br>LEI: 213800ZUA17OK3QLGM62 | Long             | EC               | CORP              | US        |   2824969 | NS      | $151022842.74 | 2.98%             |  |  |  | No            |                  1 | On Loan: No      |
| Edwards Lifesciences Corp          | Edwards Lifesciences Corp          | CUSIP: 28176E108<br>LEI: YA13X31F3V31L8TMPR58 | Long             | EC               | CORP              | US        |   1260712 | NS      | $94061722.32  | 1.85%             |  |  |  | No            |                  1 | On Loan: No      |
| Rockwell Automation Inc            | Rockwell Automation Inc            | CUSIP: 773903109<br>LEI: VH3R4HHBHH12O0EXZJ88 | Long             | EC               | CORP              | US        |    171528 | NS      | $44180466.96  | 0.87%             |  |  |  | No            |                  1 | On Loan: No      |
| Illinois Tool Works Inc            | Illinois Tool Works Inc            | CUSIP: 452308109<br>LEI: 76NA4I14SZCFAYMNSV04 | Long             | EC               | CORP              | US        |    346936 | NS      | $76430000.80  | 1.51%             |  |  |  | No            |                  1 | On Loan: No      |
| Eli Lilly & Co                     | Eli Lilly & Co                     | CUSIP: 532457108<br>LEI: FRDRIPF3EKNDJ2CQJL29 | Long             | EC               | CORP              | US        |    552179 | NS      | $202009165.36 | 3.98%             |  |  |  | No            |                  1 | On Loan: No      |
| Verisk Analytics Inc               | Verisk Analytics Inc               | CUSIP: 92345Y106<br>LEI: 549300I1YSWNIRKBWP67 | Long             | EC               | CORP              | US        |    446091 | NS      | $78699374.22  | 1.55%             |  |  |  | No            |                  1 | On Loan: No      |
| PepsiCo Inc                        | PepsiCo Inc                        | CUSIP: 713448108<br>LEI: FJSUNZKFNQ5YPJ5OT455 | Long             | EC               | CORP              | US        |    925257 | NS      | $167156929.62 | 3.29%             |  |  |  | No            |                  1 | On Loan: No      |
| Intuitive Surgical Inc             | Intuitive Surgical Inc             | CUSIP: 46120E602<br>LEI: 54930052SRG011710797 | Long             | EC               | CORP              | US        |    241403 | NS      | $64056286.05  | 1.26%             |  |  |  | No            |                  1 | On Loan: No      |
| Motorola Solutions Inc             | Motorola Solutions Inc             | CUSIP: 620076307<br>LEI: 6S552MUG6KGJVEBSEC55 | Long             | EC               | CORP              | US        |    463508 | NS      | $119450646.68 | 2.35%             |  |  |  | No            |                  1 | On Loan: No      |
| TJX Cos Inc/The                    | TJX Cos Inc/The                    | CUSIP: 872540109<br>LEI: V167QI9I69W364E2DY52 | Long             | EC               | CORP              | US        |   1480402 | NS      | $117839999.20 | 2.32%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2023-02-22

**Name of Applicant:** Pioneer Series Trust X

**Signature:** Anthony J. Koenig, Jr

**Name of Signer:** Anthony J. Koenig, Jr

**Title:** Managing Director, Chief Operations Officer & Treasurer of the Funds