# EDGAR Filing Document

**Accession Number:** 0000822632
**File Stem:** 0001410368-26-013321
**Filing Date:** 2026-2
**Character Count:** 20388
**Document Hash:** cb7e57f7f798b38609ca6d64c41899c5
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001410368-26-013321.hdr.sgml**: 20260218

**ACCESSION NUMBER**: 0001410368-26-013321

**CONFORMED SUBMISSION TYPE**: NPORT-P

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260218

**DATE AS OF CHANGE**: 20260218

**PERIOD START**: 20251231

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** WILLIAM BLAIR FUNDS
- **CENTRAL INDEX KEY:** 0000822632

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** NPORT-P
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-05344
- **FILM NUMBER:** 26646321

**BUSINESS ADDRESS:**
- **STREET 1:** 150 NORTH RIVERSIDE PLAZA
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606
- **BUSINESS PHONE:** 3123648000

**MAIL ADDRESS:**
- **STREET 1:** 150 NORTH RIVERSIDE PLAZA
- **CITY:** CHICAGO
- **STATE:** IL
- **ZIP:** 60606

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** WILLIAM BLAIR MUTUAL FUNDS INC
- **DATE OF NAME CHANGE:** 19960112

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** BLAIR WILLIAM READY RESERVES INC
- **DATE OF NAME CHANGE:** 19920316

## Series and Classes Contracts Data

### William Blair Growth Fund (Series ID: S000008594)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000023523 | Class N      | WBGSX           |
| C000023524 | Class I      | BGFIX           |
| C000211716 | Class R6     | BGFRX           |

## Form NPORT-P: Monthly Portfolio Investments Report

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

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

- **a. Name of Registrant:** WILLIAM BLAIR FUNDS

- **b. Investment Company Act file number:** 811-05344

- **c. CIK number of Registrant:** 0000822632

- **d. LEI of Registrant:** SNQR0U5FDV8EZZX4W051

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

  - **Street Address 1:** 150 NORTH RIVERSIDE PLAZA

  - **City:** CHICAGO

  - **State:** IL

  - **Foreign country:** US

  - **Zip / Postal Code:** 60606

  - **Telephone number:** 312-364-8000

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

- **a. Name of Series:** William Blair Growth Fund

- **b. EDGAR series identifier (if any):** S000008594

- **c. LEI of Series:** 549300CN8MT9K8UCDE27

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

- **a. Date of fiscal year-end:** 2025-12-31

- **b. Date as of which information is reported:** 2025-12-31

**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:** $228635753.17

**Total Liabilities:** $230455.37

**Net Assets:** $228405297.80

**Monthly Return Information**

| Class               | Month 1 Return (%)   | Month 2 Return (%)   | Month 3 Return (%)   |
|:---|:---|:---|:---|
| Class ID C000023523 | 4.00%                | -2.66%               | -1.87%               |
| Class ID C000023524 | 4.08%                | -2.68%               | -1.77%               |
| Class ID C000211716 | 4.05%                | -2.73%               | -1.69%               |

**Monthly Gains & Losses**

| Period   | Net Realized Gain/Loss   | Net Unrealized Appreciation/Depreciation   |
|:---|:---|:---|
| Month 1  | $2090878.74              | $8050327.57                                |
| Month 2  | $3258820.02              | $-10014947.29                              |
| Month 3  | $3559168.25              | $-7798256.74                               |

### 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   |
|:---|:---|:---|:---|:---|:---|:---|---:|:---|:---|:---|:---|:---|:---|:---|---:|:---|
| ACV Auctions Inc                 | ACV Auctions Inc                 | CUSIP: 00091G104<br>LEI: N/A                  | Long             | EC               | CORP              | US        |    151775 | NS      | $1217235.50   | 0.53%             |  |  |  | No            |                  1 | On Loan: No      |
| Abbott Laboratories              | Abbott Laboratories              | CUSIP: 002824100<br>LEI: HQD377W2YR662HK5JX27 | Long             | EC               | CORP              | US        |     21011 | NS      | $2632468.19   | 1.15%             |  |  |  | No            |                  1 | On Loan: No      |
| Advanced Micro Devices Inc       | Advanced Micro Devices Inc       | CUSIP: 007903107<br>LEI: R2I72C950HOYXII45366 | Long             | EC               | CORP              | US        |     41438 | NS      | $8874362.08   | 3.89%             |  |  |  | No            |                  1 | On Loan: No      |
| Agilent Technologies Inc         | Agilent Technologies Inc         | CUSIP: 00846U101<br>LEI: QUIX8Y7A2WP0XRMW7G29 | Long             | EC               | CORP              | US        |     43146 | NS      | $5870876.22   | 2.57%             |  |  |  | No            |                  1 | On Loan: No      |
| Agilysys Inc                     | Agilysys Inc                     | CUSIP: 00847J105<br>LEI: 5299001XWB5V3B5IPN93 | Long             | EC               | CORP              | US        |     10717 | NS      | $1273608.28   | 0.56%             |  |  |  | No            |                  1 | On Loan: No      |
| Alphabet Inc                     | Alphabet Inc                     | CUSIP: 02079K305<br>LEI: 5493006MHB84DD0ZWV18 | Long             | EC               | CORP              | US        |     36053 | NS      | $11284589.00  | 4.94%             |  |  |  | No            |                  1 | On Loan: No      |
| Amazon.com Inc                   | Amazon.com Inc                   | CUSIP: 023135106<br>LEI: ZXTILKJKG63JELOEG630 | Long             | EC               | CORP              | US        |     43437 | NS      | $10026128.34  | 4.39%             |  |  |  | No            |                  1 | On Loan: No      |
| Apple Inc                        | Apple Inc                        | CUSIP: 037833100<br>LEI: HWUPKR0MPOU8FGXBT394 | Long             | EC               | CORP              | US        |     53309 | NS      | $14492584.74  | 6.35%             |  |  |  | No            |                  1 | On Loan: No      |
| Baldwin Insurance Group Inc/The  | Baldwin Insurance Group Inc/The  | CUSIP: 05589G102<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     63750 | NS      | $1531912.50   | 0.67%             |  |  |  | No            |                  1 | On Loan: No      |
| Blue Owl Capital Inc             | Blue Owl Capital Inc             | CUSIP: 09581B103<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     87187 | NS      | $1302573.78   | 0.57%             |  |  |  | No            |                  1 | On Loan: No      |
| Broadcom Inc                     | Broadcom Inc                     | CUSIP: 11135F101<br>LEI: 549300WV6GIDOZJTV909 | Long             | EC               | CORP              | US        |     26559 | NS      | $9192069.90   | 4.02%             |  |  |  | No            |                  1 | On Loan: No      |
| CH Robinson Worldwide Inc        | CH Robinson Worldwide Inc        | CUSIP: 12541W209<br>LEI: 529900WNWN5L0OVDHA79 | Long             | EC               | CORP              | US        |      6993 | NS      | $1124194.68   | 0.49%             |  |  |  | No            |                  1 | On Loan: No      |
| Cameco Corp                      | Cameco Corp                      | CUSIP: 13321L108<br>LEI: N4BHALMXL3GMZKCUON55 | Long             | EC               | CORP              | CA        |     50826 | NS      | $4650070.74   | 2.04%             |  |  |  | No            |                  1 | On Loan: No      |
| Carlyle Group Inc/The            | Carlyle Group Inc/The            | CUSIP: 14316J108<br>LEI: 529900NGGVF94UK6PG95 | Long             | EC               | CORP              | US        |     67715 | NS      | $4002633.65   | 1.75%             |  |  |  | No            |                  1 | On Loan: No      |
| Chipotle Mexican Grill Inc       | Chipotle Mexican Grill Inc       | CUSIP: 169656105<br>LEI: 529900REP5VGTPCP1J71 | Long             | EC               | CORP              | US        |     77892 | NS      | $2882004.00   | 1.26%             |  |  |  | No            |                  1 | On Loan: No      |
| Copart Inc                       | Copart Inc                       | CUSIP: 217204106<br>LEI: 549300KVYX3JWMYEHU61 | Long             | EC               | CORP              | US        |     69179 | NS      | $2708357.85   | 1.19%             |  |  |  | No            |                  1 | On Loan: No      |
| Doximity Inc                     | Doximity Inc                     | CUSIP: 26622P107<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     31807 | NS      | $1408413.96   | 0.62%             |  |  |  | No            |                  1 | On Loan: No      |
| Dynatrace Inc                    | Dynatrace Inc                    | CUSIP: 268150109<br>LEI: 6488T0Z33CE9L61EX904 | Long             | EC               | CORP              | US        |     59499 | NS      | $2578686.66   | 1.13%             |  |  |  | No            |                  1 | On Loan: No      |
| elf Beauty Inc                   | elf Beauty Inc                   | CUSIP: 26856L103<br>LEI: 549300U2K9TCON25C029 | Long             | EC               | CORP              | US        |     10788 | NS      | $820319.52    | 0.36%             |  |  |  | No            |                  1 | On Loan: No      |
| Evercore Inc                     | Evercore Inc                     | CUSIP: 29977A105<br>LEI: 529900P6KLPT95DW3W58 | Long             | EC               | CORP              | US        |      7030 | NS      | $2391957.50   | 1.05%             |  |  |  | No            |                  1 | On Loan: No      |
| Meta Platforms Inc               | Meta Platforms Inc               | CUSIP: 30303M102<br>LEI: BQ4BKCS1HXDV9HN80Z93 | Long             | EC               | CORP              | US        |     14337 | NS      | $9463710.33   | 4.14%             |  |  |  | No            |                  1 | On Loan: No      |
| Hammond Power Solutions Inc      | Hammond Power Solutions Inc      | CUSIP: 408549103<br>LEI: 549300OLI26OOKEG5V73 | Long             | EC               | CORP              | CA        |     10451 | NS      | $1208344.62   | 0.53%             |  |  |  | No            |                  1 | On Loan: No      |
| HealthEquity Inc                 | HealthEquity Inc                 | CUSIP: 42226A107<br>LEI: 529900LRJU1RAFQHM467 | Long             | EC               | CORP              | US        |     13041 | NS      | $1194686.01   | 0.52%             |  |  |  | No            |                  1 | On Loan: No      |
| IDEXX Laboratories Inc           | IDEXX Laboratories Inc           | CUSIP: 45168D104<br>LEI: OGMTXK0LUU1HKV2P0J84 | Long             | EC               | CORP              | US        |      3812 | NS      | $2578932.36   | 1.13%             |  |  |  | No            |                  1 | On Loan: No      |
| Inspire Medical Systems Inc      | Inspire Medical Systems Inc      | CUSIP: 457730109<br>LEI: 549300XQQCQ7HCJKTW25 | Long             | EC               | CORP              | US        |     11782 | NS      | $1086653.86   | 0.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Intuit Inc                       | Intuit Inc                       | CUSIP: 461202103<br>LEI: VI90HBPH7XSFMB9E4M29 | Long             | EC               | CORP              | US        |     10355 | NS      | $6859359.10   | 3.00%             |  |  |  | No            |                  1 | On Loan: No      |
| Lincoln Electric Holdings Inc    | Lincoln Electric Holdings Inc    | CUSIP: 533900106<br>LEI: BIMGBY40SIN95O01BN93 | Long             | EC               | CORP              | US        |      5569 | NS      | $1334555.16   | 0.58%             |  |  |  | No            |                  1 | On Loan: No      |
| Mastercard Inc                   | Mastercard Inc                   | CUSIP: 57636Q104<br>LEI: AR5L2ODV9HN37376R084 | Long             | EC               | CORP              | US        |     17917 | NS      | $10228456.96  | 4.48%             |  |  |  | No            |                  1 | On Loan: No      |
| Microsoft Corp                   | Microsoft Corp                   | CUSIP: 594918104<br>LEI: INR2EJN1ERAN0W5ZP974 | Long             | EC               | CORP              | US        |     34214 | NS      | $16546574.68  | 7.24%             |  |  |  | No            |                  1 | On Loan: No      |
| Modine Manufacturing Co          | Modine Manufacturing Co          | CUSIP: 607828100<br>LEI: Z35SZFYJR8GZZRSIUU09 | Long             | EC               | CORP              | US        |     13303 | NS      | $1776083.53   | 0.78%             |  |  |  | No            |                  1 | On Loan: No      |
| Motorola Solutions Inc           | Motorola Solutions Inc           | CUSIP: 620076307<br>LEI: 6S552MUG6KGJVEBSEC55 | Long             | EC               | CORP              | US        |      8482 | NS      | $3251320.24   | 1.42%             |  |  |  | No            |                  1 | On Loan: No      |
| Mueller Industries Inc           | Mueller Industries Inc           | CUSIP: 624756102<br>LEI: 5493005IZFE4VJLLYG84 | Long             | EC               | CORP              | US        |     15530 | NS      | $1782844.00   | 0.78%             |  |  |  | No            |                  1 | On Loan: No      |
| NVIDIA Corp                      | NVIDIA Corp                      | CUSIP: 67066G104<br>LEI: 549300S4KLFTLO7GSQ80 | Long             | EC               | CORP              | US        |    137681 | NS      | $25677506.50  | 11.24%            |  |  |  | No            |                  1 | On Loan: No      |
| Oracle Corp                      | Oracle Corp                      | CUSIP: 68389X105<br>LEI: 1Z4GXXU7ZHVWFCD8TV52 | Long             | EC               | CORP              | US        |     26404 | NS      | $5146403.64   | 2.25%             |  |  |  | No            |                  1 | On Loan: No      |
| PDF Solutions Inc                | PDF Solutions Inc                | CUSIP: 693282105<br>LEI: 549300GMSP6MROFBI160 | Long             | EC               | CORP              | US        |     63569 | NS      | $1813623.57   | 0.79%             |  |  |  | No            |                  1 | On Loan: No      |
| Primo Brands Corp                | Primo Brands Corp                | CUSIP: 741623102<br>LEI: 254900J0WS4AXV2LAX55 | Long             | EC               | CORP              | US        |     78890 | NS      | $1289851.50   | 0.56%             |  |  |  | No            |                  1 | On Loan: No      |
| Pure Storage Inc                 | Pure Storage Inc                 | CUSIP: 74624M102<br>LEI: 549300NPDB0BZTK3WO90 | Long             | EC               | CORP              | US        |     44218 | NS      | $2963048.18   | 1.30%             |  |  |  | No            |                  1 | On Loan: No      |
| Quaker Chemical Corp             | Quaker Chemical Corp             | CUSIP: 747316107<br>LEI: 549300PJQ1R3WCWCPS54 | Long             | EC               | CORP              | US        |     13655 | NS      | $1874968.05   | 0.82%             |  |  |  | No            |                  1 | On Loan: No      |
| Q2 Holdings Inc                  | Q2 Holdings Inc                  | CUSIP: 74736L109<br>LEI: 549300M9RKR9DZXWS696 | Long             | EC               | CORP              | US        |     25564 | NS      | $1844698.24   | 0.81%             |  |  |  | No            |                  1 | On Loan: No      |
| Regal Rexnord Corp               | Regal Rexnord Corp               | CUSIP: 758750103<br>LEI: QH78R09VCJGQKPBPYU33 | Long             | EC               | CORP              | US        |      8219 | NS      | $1153290.08   | 0.50%             |  |  |  | No            |                  1 | On Loan: No      |
| Rush Street Interactive Inc      | Rush Street Interactive Inc      | CUSIP: 782011100<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     72808 | NS      | $1414659.44   | 0.62%             |  |  |  | No            |                  1 | On Loan: No      |
| ServiceNow Inc                   | ServiceNow Inc                   | CUSIP: 81762P102<br>LEI: 549300HJTQM36M0E1G39 | Long             | EC               | CORP              | US        |     39618 | NS      | $6069081.42   | 2.66%             |  |  |  | No            |                  1 | On Loan: No      |
| Simply Good Foods Co/The         | Simply Good Foods Co/The         | CUSIP: 82900L102<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     57512 | NS      | $1154840.96   | 0.51%             |  |  |  | No            |                  1 | On Loan: No      |
| Champion Homes Inc               | Champion Homes Inc               | CUSIP: 830830105<br>LEI: N/A                  | Long             | EC               | CORP              | US        |     19672 | NS      | $1662284.00   | 0.73%             |  |  |  | No            |                  1 | On Loan: No      |
| Snowflake Inc                    | Snowflake Inc                    | CUSIP: 833445109<br>LEI: 254900CJNSY1K7T53Z16 | Long             | EC               | CORP              | US        |     18005 | NS      | $3949576.80   | 1.73%             |  |  |  | No            |                  1 | On Loan: No      |
| Fixed Income Clearing Corp       | FIXED INC CLEARING CORP.REPO     | CUSIP: 000000000<br>LEI: 549300H47WTHXPU08X20 | Long             | RA               | CORP              | US        |   3702662 | PA      | $3702661.61   | 1.62%             |  |  |  | No            |                  2 | On Loan: No      |
| TransUnion                       | TransUnion                       | CUSIP: 89400J107<br>LEI: 549300ZS772LUNUMRB03 | Long             | EC               | CORP              | US        |     29641 | NS      | $2541715.75   | 1.11%             |  |  |  | No            |                  1 | On Loan: No      |
| Twist Bioscience Corp            | Twist Bioscience Corp            | CUSIP: 90184D100<br>LEI: 549300T23BL59LCOH584 | Long             | EC               | CORP              | US        |     36199 | NS      | $1148232.28   | 0.50%             |  |  |  | No            |                  1 | On Loan: No      |
| Tyler Technologies Inc           | Tyler Technologies Inc           | CUSIP: 902252105<br>LEI: 25490040SMU4Z8LBCW70 | Long             | EC               | CORP              | US        |      4864 | NS      | $2208012.80   | 0.97%             |  |  |  | No            |                  1 | On Loan: No      |
| UnitedHealth Group Inc           | UnitedHealth Group Inc           | CUSIP: 91324P102<br>LEI: 549300GHBMY8T5GXDE41 | Long             | EC               | CORP              | US        |     14051 | NS      | $4638375.61   | 2.03%             |  |  |  | No            |                  1 | On Loan: No      |
| Walmart Inc                      | Walmart Inc                      | CUSIP: 931142103<br>LEI: Y87794H0US1R65VBXU25 | Long             | EC               | CORP              | US        |     67833 | NS      | $7557274.53   | 3.31%             |  |  |  | No            |                  1 | On Loan: No      |
| West Pharmaceutical Services Inc | West Pharmaceutical Services Inc | CUSIP: 955306105<br>LEI: 5493007NKRGM1RJQ1P16 | Long             | EC               | CORP              | US        |     11668 | NS      | $3210333.52   | 1.41%             |  |  |  | No            |                  1 | On Loan: No      |

### Signature

**Date Signed:** 2026-01-15

**Name of Applicant:** WILLIAM BLAIR FUNDS

**Signature:** John Raczek

**Name of Signer:** John Raczek

**Title:** Principal Financial Officer