# EDGAR Filing Document

**Accession Number:** 0000078713
**File Stem:** 0001752724-23-035873
**Filing Date:** 2023-2
**Character Count:** 18027
**Document Hash:** 31a163e775c99f0477e24e4ddbc379f4
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001752724-23-035873.hdr.sgml**: 20230223

**ACCESSION NUMBER**: 0001752724-23-035873

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20221230

**FILED AS OF DATE**: 20230223

**DATE AS OF CHANGE**: 20230223

**PERIOD START**: 20221231

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** PIONEER FUND /MA/
- **CENTRAL INDEX KEY:** 0000078713
- **IRS NUMBER:** 046013015
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-01466
- **FILM NUMBER:** 23657577

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

**MAIL ADDRESS:**
- **STREET 1:** 60 STATE ST
- **STREET 2:** 5TH FLOOR
- **CITY:** BOSTON
- **STATE:** MA
- **ZIP:** 02109-1820

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** PIONEER FUND INC
- **DATE OF NAME CHANGE:** 19920703

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** FIDELITY INVESTMENT ASSOCIATES INC
- **DATE OF NAME CHANGE:** 19680607

## Series and Classes Contracts Data

### Pioneer Fund (Series ID: S000003991)

| Class ID   | Class Name            | Ticker Symbol   |
|:---|:---|:---|
| C000011118 | Pioneer Fund: Class A | PIODX           |
| C000011120 | Pioneer Fund: Class C | PCODX           |
| C000011121 | Pioneer Fund: Class Y | PYODX           |
| C000011122 | Pioneer Fund: Class R | PIORX           |
| C000202421 | Pioneer Fund: Class K | PIOKX           |

## 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 FUND /MA/

- **b. Investment Company Act file number:** 811-01466

- **c. CIK number of Registrant:** 0000078713

- **d. LEI of Registrant:** HZUZDEH49POKNILHKM86

- **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 Fund

- **b. EDGAR series identifier (if any):** S000003991

- **c. LEI of Series:** HZUZDEH49POKNILHKM86

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

- **a. Date of fiscal year-end:** 2022-12-31

- **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:** $6547512414.98

**Total Liabilities:** $7026453.14

**Net Assets:** $6540485961.84

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000011118 | 7.69%                | 7.16%                | -5.99%               |
| Class ID C000011121 | 7.75%                | 7.17%                | -5.99%               |
| Class ID C000011120 | 7.66%                | 7.10%                | -6.08%               |
| Class ID C000011122 | 7.67%                | 7.07%                | -6.04%               |
| Class ID C000202421 | 7.71%                | 7.17%                | -5.95%               |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $2562495.78              | $475156003.17                              |
| Month 2  | $-33793343.41            | $499210604.31                              |
| Month 3  | $7209272.02              | $-436238619.31                             |

### Schedule of Portfolio Investments

| Name                               | Title                                  | Identifiers                                   | Payoff Profile   | Asset Category   | Issuer Category   | Country   |   Balance | Units   | Value (USD)   | % of Net Assets   | Maturity Date   | Coupon Type   | Annualized Rate (%)   | Restricted?   |   Fair Value Level | Lending Status   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| Live Nation Entertainment Inc      | Live Nation Entertainment Inc          | CUSIP: 538034109<br>LEI: 5493007B9BM9ZXJINO78 | Long             | EC               | CORP              | US        |   1607566 | NS      | $112111652.84 | 1.71%             |  |  |  | No            |                  1 | On Loan: No      |
| Regeneron Pharmaceuticals Inc      | Regeneron Pharmaceuticals Inc          | CUSIP: 75886F107<br>LEI: 549300RCBFWIRX3HYQ56 | Long             | EC               | CORP              | US        |    164476 | NS      | $118667789.24 | 1.81%             |  |  |  | No            |                  1 | On Loan: No      |
| Lam Research Corp                  | Lam Research Corp                      | CUSIP: 512807108<br>LEI: 549300I4GMO6D34U1T02 | Long             | EC               | CORP              | US        |    247856 | NS      | $104173876.80 | 1.59%             |  |  |  | No            |                  1 | On Loan: No      |
| Rockwell Automation Inc            | Rockwell Automation Inc                | CUSIP: 773903109<br>LEI: VH3R4HHBHH12O0EXZJ88 | Long             | EC               | CORP              | US        |    319929 | NS      | $82404112.53  | 1.26%             |  |  |  | No            |                  1 | On Loan: No      |
| Booking Holdings Inc               | Booking Holdings Inc                   | CUSIP: 09857L108<br>LEI: FXM8FAOHMYDIPD38UZ17 | Long             | EC               | CORP              | US        |        34 | NS      | $68519.52     | 0.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Costco Wholesale Corp              | Costco Wholesale Corp                  | CUSIP: 22160K105<br>LEI: 29DX7H14B9S6O3FD6V18 | Long             | EC               | CORP              | US        |    385255 | NS      | $175868907.50 | 2.69%             |  |  |  | No            |                  1 | On Loan: No      |
| Amazon.com Inc                     | Amazon.com Inc                         | CUSIP: 023135106<br>LEI: ZXTILKJKG63JELOEG630 | Long             | EC               | CORP              | US        |   1656785 | NS      | $139169940.00 | 2.13%             |  |  |  | No            |                  1 | On Loan: No      |
| Eli Lilly & Co                     | Eli Lilly & Co                         | CUSIP: 532457108<br>LEI: FRDRIPF3EKNDJ2CQJL29 | Long             | EC               | CORP              | US        |    431263 | NS      | $157773255.92 | 2.41%             |  |  |  | No            |                  1 | On Loan: No      |
| Elanco Animal Health Inc           | Elanco Animal Health Inc               | CUSIP: 28414H103<br>LEI: 549300SHPNDCE059M934 | Long             | EC               | CORP              | US        |   8871805 | NS      | $108413457.10 | 1.66%             |  |  |  | No            |                  1 | On Loan: No      |
| Martin Marietta Materials Inc      | Martin Marietta Materials Inc          | CUSIP: 573284106<br>LEI: 5299005MZ4WZECVATV08 | Long             | EC               | CORP              | US        |    631147 | NS      | $213308751.59 | 3.26%             |  |  |  | No            |                  1 | On Loan: No      |
| Akamai Technologies Inc            | Akamai Technologies Inc                | CUSIP: 00971T101<br>LEI: OC1LZNN2LF5WTJ5RIL89 | Long             | EC               | CORP              | US        |   1541363 | NS      | $129936900.90 | 1.99%             |  |  |  | No            |                  1 | On Loan: No      |
| Electronic Arts Inc                | Electronic Arts Inc                    | CUSIP: 285512109<br>LEI: 549300O7A67PUEYKDL45 | Long             | EC               | CORP              | US        |   1188310 | NS      | $145187715.80 | 2.22%             |  |  |  | No            |                  1 | On Loan: No      |
| TREASURY BILL                      | United States Treasury Bill            | CUSIP: 912796ZH5<br>LEI: 254900HROIFWPRGM1V77 | Long             | DBT              | UST               | US        |  28000000 | PA      | $28000000.00  | 0.43%             | 2023-01-03      | None          | 0.00%                 | No            |                  2 | On Loan: No      |
| Danaher Corp                       | Danaher Corp                           | CUSIP: 235851102<br>LEI: S4BKK9OTCEWQ3YHPFM11 | Long             | EC               | CORP              | US        |    669947 | NS      | $177817332.74 | 2.72%             |  |  |  | No            |                  1 | On Loan: No      |
| Union Pacific Corp                 | Union Pacific Corp                     | CUSIP: 907818108<br>LEI: 549300LMMRSZZCZ8CL11 | Long             | EC               | CORP              | US        |    468747 | NS      | $97063441.29  | 1.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Thermo Fisher Scientific Inc       | Thermo Fisher Scientific Inc           | CUSIP: 883556102<br>LEI: HCHV7422L5HDJZCRFL38 | Long             | EC               | CORP              | US        |    199746 | NS      | $109998124.74 | 1.68%             |  |  |  | No            |                  1 | On Loan: No      |
| Schlumberger Ltd                   | Schlumberger Ltd                       | CUSIP: 806857108<br>LEI: 213800ZUA17OK3QLGM62 | Long             | EC               | CORP              | US        |   1404143 | NS      | $75065484.78  | 1.15%             |  |  |  | No            |                  1 | On Loan: No      |
| EOG Resources Inc                  | EOG Resources Inc                      | CUSIP: 26875P101<br>LEI: XWTZDRYZPBUHIQBKDB46 | Long             | EC               | CORP              | US        |   2027647 | NS      | $262620839.44 | 4.02%             |  |  |  | No            |                  1 | On Loan: No      |
| Estee Lauder Cos Inc/The           | Estee Lauder Cos Inc/The               | CUSIP: 518439104<br>LEI: 549300VFZ8XJ9NUPU221 | Long             | EC               | CORP              | US        |    164651 | NS      | $40851559.61  | 0.62%             |  |  |  | No            |                  1 | On Loan: No      |
| Apple Inc                          | Apple Inc                              | CUSIP: 037833100<br>LEI: HWUPKR0MPOU8FGXBT394 | Long             | EC               | CORP              | US        |   2527716 | NS      | $328426139.88 | 5.02%             |  |  |  | No            |                  1 | On Loan: No      |
| NIKE Inc                           | NIKE Inc                               | CUSIP: 654106103<br>LEI: 787RXPR0UX0O0XUXPZ81 | Long             | EC               | CORP              | US        |   1055344 | NS      | $123485801.44 | 1.89%             |  |  |  | No            |                  1 | On Loan: No      |
| Home Depot Inc/The                 | Home Depot Inc/The                     | CUSIP: 437076102<br>LEI: QEKMOTMBBKA8I816DO57 | Long             | EC               | CORP              | US        |    526558 | NS      | $166318609.88 | 2.54%             |  |  |  | No            |                  1 | On Loan: No      |
| Alphabet Inc                       | Alphabet Inc                           | CUSIP: 02079K305<br>LEI: 5493006MHB84DD0ZWV18 | Long             | EC               | CORP              | US        |   5111056 | NS      | $450948470.88 | 6.89%             |  |  |  | No            |                  1 | On Loan: No      |
| Visa Inc                           | Visa Inc                               | CUSIP: 92826C839<br>LEI: 549300JZ4OKEHW3DPJ59 | Long             | EC               | CORP              | US        |    532422 | NS      | $110615994.72 | 1.69%             |  |  |  | No            |                  1 | On Loan: No      |
| Citizens Financial Group Inc       | Citizens Financial Group Inc           | CUSIP: 174610105<br>LEI: 2138004JDDA4ZQUPFW65 | Long             | EC               | CORP              | US        |   7085208 | NS      | $278944638.96 | 4.26%             |  |  |  | No            |                  1 | On Loan: No      |
| CME Group Inc                      | CME Group Inc                          | CUSIP: 12572Q105<br>LEI: LCZ7XYGSLJUHFXXNXD88 | Long             | EC               | CORP              | US        |    570519 | NS      | $95938475.04  | 1.47%             |  |  |  | No            |                  1 | On Loan: No      |
| Caterpillar Inc                    | Caterpillar Inc                        | CUSIP: 149123101<br>LEI: WRJR7GS4GTRECRRTVX92 | Long             | EC               | CORP              | US        |    962408 | NS      | $230554460.48 | 3.53%             |  |  |  | No            |                  1 | On Loan: No      |
| Planet Fitness Inc                 | Planet Fitness Inc                     | CUSIP: 72703H101<br>LEI: 549300LLE5HUPF6H8G33 | Long             | EC               | CORP              | US        |   1147643 | NS      | $90434268.40  | 1.38%             |  |  |  | No            |                  1 | On Loan: No      |
| IFF                                | International Flavors & Fragrances Inc | CUSIP: 459506101<br>LEI: BZLRL03D3GPGMOGFO832 | Long             | EC               | CORP              | US        |   2628465 | NS      | $275568270.60 | 4.21%             |  |  |  | No            |                  1 | On Loan: No      |
| KLA Corp                           | KLA Corp                               | CUSIP: 482480100<br>LEI: 549300H0BF5JCG96TJ81 | Long             | EC               | CORP              | US        |    569074 | NS      | $214557970.22 | 3.28%             |  |  |  | No            |                  1 | On Loan: No      |
| Truist Financial Corp              | Truist Financial Corp                  | CUSIP: 89832Q109<br>LEI: 549300DRQQI75D2JP341 | Long             | EC               | CORP              | US        |   6620259 | NS      | $284869744.77 | 4.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Adobe Inc                          | Adobe Inc                              | CUSIP: 00724F101<br>LEI: FU4LY2G4933NH2E1CP29 | Long             | EC               | CORP              | US        |    387079 | NS      | $130263695.87 | 1.99%             |  |  |  | No            |                  1 | On Loan: No      |
| Microsoft Corp                     | Microsoft Corp                         | CUSIP: 594918104<br>LEI: INR2EJN1ERAN0W5ZP974 | Long             | EC               | CORP              | US        |   1286643 | NS      | $308562724.26 | 4.72%             |  |  |  | No            |                  1 | On Loan: No      |
| Vertex Pharmaceuticals Inc         | Vertex Pharmaceuticals Inc             | CUSIP: 92532F100<br>LEI: 54930015RAQRRZ5ZGJ91 | Long             | EC               | CORP              | US        |    271747 | NS      | $78475098.66  | 1.20%             |  |  |  | No            |                  1 | On Loan: No      |
| Analog Devices Inc                 | Analog Devices Inc                     | CUSIP: 032654105<br>LEI: GYVOE5EZ4GDAVTU4CQ61 | Long             | EC               | CORP              | US        |   1844068 | NS      | $302482474.04 | 4.62%             |  |  |  | No            |                  1 | On Loan: No      |
| NVIDIA Corp                        | NVIDIA Corp                            | CUSIP: 67066G104<br>LEI: 549300S4KLFTLO7GSQ80 | Long             | EC               | CORP              | US        |    682465 | NS      | $99735435.10  | 1.52%             |  |  |  | No            |                  1 | On Loan: No      |
| Medtronic PLC                      | Medtronic PLC                          | CUSIP: 000000000<br>LEI: 549300GX3ZBSQWUXY261 | Long             | EC               | CORP              | IE        |    849056 | NS      | $65988632.32  | 1.01%             |  |  |  | No            |                  1 | On Loan: No      |
| PNC Financial Services Group I     | PNC Financial Services Group Inc/The   | CUSIP: 693475105<br>LEI: CFGNEKW0P8842LEUIA51 | Long             | EC               | CORP              | US        |    463689 | NS      | $73235040.66  | 1.12%             |  |  |  | No            |                  1 | On Loan: No      |
| UnitedHealth Group Inc             | UnitedHealth Group Inc                 | CUSIP: 91324P102<br>LEI: 549300GHBMY8T5GXDE41 | Long             | EC               | CORP              | US        |    289831 | NS      | $153662599.58 | 2.35%             |  |  |  | No            |                  1 | On Loan: No      |
| Freeport-McMoRan Inc               | Freeport-McMoRan Inc                   | CUSIP: 35671D857<br>LEI: 549300IRDTHJQ1PVET45 | Long             | EC               | CORP              | US        |   5006202 | NS      | $190235676.00 | 2.91%             |  |  |  | No            |                  1 | On Loan: No      |
| United Parcel Service Inc          | United Parcel Service Inc              | CUSIP: 911312106<br>LEI: D01LMJZU09ULLNCY6Z23 | Long             | EC               | CORP              | US        |   1049329 | NS      | $182415353.36 | 2.79%             |  |  |  | No            |                  1 | On Loan: No      |
| Dreyfus Government Cash Management | Dreyfus Government Cash Management     | CUSIP: 262006208<br>LEI: 5493000Q69I5Q3QZIA91 | Long             | STIV             | RF                | US        |  24064516 | NS      | $24064515.86  | 0.37%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

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

**Name of Applicant:** PIONEER FUND /MA/

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

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

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