# EDGAR Filing Document

**Accession Number:** 0000822632
**File Stem:** 0001193125-26-226998
**Filing Date:** 2026-5
**Character Count:** 13028
**Document Hash:** 1c66ecf86e140b4dec20d083362006f0
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-26-226998.hdr.sgml**: 20260515

**ACCESSION NUMBER**: 0001193125-26-226998

**CONFORMED SUBMISSION TYPE**: 24F-2NT

**PUBLIC DOCUMENT COUNT**: 1

**CONFORMED PERIOD OF REPORT**: 20251231

**FILED AS OF DATE**: 20260515

**DATE AS OF CHANGE**: 20260515

**EFFECTIVENESS DATE**: 20260515

**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:** 24F-2NT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-17463
- **FILM NUMBER:** 26988765

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

---

### William Blair International Small Cap Growth Fund (Series ID: S000008595)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class N    | WISNX         | C000023525 |
| Class I    | WISIX         | C000023526 |
| Class R6   | WIISX         | C000023527 |

---

### William Blair Emerging Markets Growth Fund (Series ID: S000008596)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class N    | WBENX         | C000023528 |
| Class I    | WBEIX         | C000023529 |
| Class R6   | BIEMX         | C000023530 |

---

### William Blair Small Cap Value Fund (Series ID: S000008597)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class N    | WBVNX         | C000023531 |
| Class I    | ICSCX         | C000023532 |
| Class R6   | WBVRX         | C000211717 |

---

### William Blair Large Cap Growth Fund (Series ID: S000008601)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class N    | LCGNX         | C000023538 |
| Class I    | LCGFX         | C000023539 |
| Class R6   | LCGJX         | C000211719 |

---

### William Blair Small Cap Growth Fund (Series ID: S000008602)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class N    | WBSNX         | C000023540 |
| Class I    | WBSIX         | C000023541 |
| Class R6   | WBSRX         | C000211720 |

---

### William Blair Small-Mid Cap Growth Fund (Series ID: S000008603)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class N    | WSMNX         | C000023542 |
| Class I    | WSMDX         | C000023543 |
| Class R6   | WSMRX         | C000211721 |

---

### William Blair International Growth Fund (Series ID: S000008604)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class N    | WBIGX         | C000023544 |
| Class I    | BIGIX         | C000023545 |
| Class R6   | WBIRX         | C000211722 |

---

### William Blair Institutional International Growth Fund (Series ID: S000008605)

---

|  |  |  |
|:---|:---|:---|
| Class Name          | Ticker Symbol | Class ID   |
| Institutional Class | WBIIX         | C000023546 |

---

### William Blair Global Leaders Fund (Series ID: S000019315)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class N    | WGGNX         | C000053607 |
| Class I    | WGFIX         | C000053608 |
| Class R6   | BGGIX         | C000053609 |

---

### William Blair Emerging Markets Leaders Fund (Series ID: S000021052)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | WBELX         | C000059867 |
| Class R6   | WELIX         | C000059868 |
| Class N    | WELNX         | C000088850 |

---

### William Blair Emerging Markets Small Cap Growth Fund (Series ID: S000034349)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | BESIX         | C000105753 |
| Class N    | WESNX         | C000105754 |
| Class R6   | WESJX         | C000105755 |

---

### William Blair International Leaders Fund (Series ID: S000037763)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class N    | WILNX         | C000116468 |
| Class I    | WILIX         | C000116469 |
| Class R6   | WILJX         | C000116470 |

---

### William Blair Small-Mid Cap Core Fund (Series ID: S000066499)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | WBCIX         | C000214491 |
| Class R6   | WBCRX         | C000214492 |

---

### William Blair Emerging Markets Debt Fund (Series ID: S000069167)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class R6   | WEDRX         | C000221008 |
| Class I    | WEDIX         | C000221009 |

---

### William Blair China Growth Fund (Series ID: S000072753)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | WICGX         | C000229252 |
| Class R6   | WRCGX         | C000229253 |

---

### William Blair Emerging Markets ex China Growth Fund (Series ID: S000075390)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | WXCIX         | C000234384 |
| Class R6   | WXCRX         | C000234385 |

---

### William Blair Mid Cap Value Fund (Series ID: S000075391)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | WVMIX         | C000234386 |
| Class R6   | WVMRX         | C000234387 |

---

### William Blair Small-Mid Cap Value Fund (Series ID: S000080810)

---

|  |  |  |
|:---|:---|:---|
| Class Name | Ticker Symbol | Class ID   |
| Class I    | ISMVX         | C000243363 |
| Class R6   | RSMVX         | C000243364 |

---

## 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           |

### William Blair International Small Cap Growth Fund (Series ID: S000008595)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000023525 | Class N      | WISNX           |
| C000023526 | Class I      | WISIX           |
| C000023527 | Class R6     | WIISX           |

### William Blair Emerging Markets Growth Fund (Series ID: S000008596)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000023528 | Class N      | WBENX           |
| C000023529 | Class I      | WBEIX           |
| C000023530 | Class R6     | BIEMX           |

### William Blair Small Cap Value Fund (Series ID: S000008597)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000023531 | Class N      | WBVNX           |
| C000023532 | Class I      | ICSCX           |
| C000211717 | Class R6     | WBVRX           |

### William Blair Large Cap Growth Fund (Series ID: S000008601)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000023538 | Class N      | LCGNX           |
| C000023539 | Class I      | LCGFX           |
| C000211719 | Class R6     | LCGJX           |

### William Blair Small Cap Growth Fund (Series ID: S000008602)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000023540 | Class N      | WBSNX           |
| C000023541 | Class I      | WBSIX           |
| C000211720 | Class R6     | WBSRX           |

### William Blair Small-Mid Cap Growth Fund (Series ID: S000008603)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000023542 | Class N      | WSMNX           |
| C000023543 | Class I      | WSMDX           |
| C000211721 | Class R6     | WSMRX           |

### William Blair International Growth Fund (Series ID: S000008604)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000023544 | Class N      | WBIGX           |
| C000023545 | Class I      | BIGIX           |
| C000211722 | Class R6     | WBIRX           |

### William Blair Institutional International Growth Fund (Series ID: S000008605)

| Class ID   | Class Name          | Ticker Symbol   |
|:---|:---|:---|
| C000023546 | Institutional Class | WBIIX           |

### William Blair Global Leaders Fund (Series ID: S000019315)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000053607 | Class N      | WGGNX           |
| C000053608 | Class I      | WGFIX           |
| C000053609 | Class R6     | BGGIX           |

### William Blair Emerging Markets Leaders Fund (Series ID: S000021052)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000059867 | Class I      | WBELX           |
| C000059868 | Class R6     | WELIX           |
| C000088850 | Class N      | WELNX           |

### William Blair Emerging Markets Small Cap Growth Fund (Series ID: S000034349)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000105753 | Class I      | BESIX           |
| C000105754 | Class N      | WESNX           |
| C000105755 | Class R6     | WESJX           |

### William Blair International Leaders Fund (Series ID: S000037763)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000116468 | Class N      | WILNX           |
| C000116469 | Class I      | WILIX           |
| C000116470 | Class R6     | WILJX           |

### William Blair Small-Mid Cap Core Fund (Series ID: S000066499)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000214491 | Class I      | WBCIX           |
| C000214492 | Class R6     | WBCRX           |

### William Blair Emerging Markets Debt Fund (Series ID: S000069167)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000221008 | Class R6     | WEDRX           |
| C000221009 | Class I      | WEDIX           |

### William Blair China Growth Fund (Series ID: S000072753)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000229252 | Class I      | WICGX           |
| C000229253 | Class R6     | WRCGX           |

### William Blair Emerging Markets ex China Growth Fund (Series ID: S000075390)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000234384 | Class I      | WXCIX           |
| C000234385 | Class R6     | WXCRX           |

### William Blair Mid Cap Value Fund (Series ID: S000075391)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000234386 | Class I      | WVMIX           |
| C000234387 | Class R6     | WVMRX           |

### William Blair Small-Mid Cap Value Fund (Series ID: S000080810)

| Class ID   | Class Name   | Ticker Symbol   |
|:---|:---|:---|
| C000243363 | Class I      | ISMVX           |
| C000243364 | Class R6     | RSMVX           |

## FORM 24F-2NT: Annual Notice of Securities Sold Pursuant to Rule 24f-2

### 24F-2NT: Filer Information

**Filer CIK:** 822632

**Is this a LIVE or TEST Filing?:** LIVE

**Filer Investment Company Type:** N-1A

### 24F-2NT: Annual Filing Information

**1. Name and address of issuer:**

- **Name of Issuer:** William Blair Funds

- **Address:** 150 North Riverside Plaza, Chicago, IL 60606

**2. The Name and EDGAR Identifier of each series or class of securities for which this Form is filed:**

- [ ] Check box if the Form is being filed for all series and classes of the issuer.

**3. Investment Company Act File Number:** 811-05344

   **Securities Act File Number:** 033-17463

**4(a). Last day of fiscal year for which this Form is filed:** 12/31/2025

**4(b). Check box if this Form is being filed late:** [x]

**4(c). Check box if this is the last time the issuer will be filing this Form:** [ ]

**5. Calculation of registration fee:**

- **(i) Aggregate sale price of securities sold during the fiscal year:** $2689867450.00

- **(ii) Aggregate price of securities redeemed or repurchased during the fiscal year:** $4726412266.00

- **(iii) Aggregate price of securities redeemed or repurchased during any prior fiscal year:** $6232962572.00

- **(iv) Total available redemption credits [add Items 5(ii) and 5(iii)]:** $10959374838.00

- **(v) Net sales:** $0.00

- **(vi) Redemption credits available for use in future years:** $-8269507388.00

- **(vii) Multiplier for determining registration fee:** 0.0001381

- **(viii) Registration fee due:** $0.00

**Signatures**

**Name and Title:** John M. Raczek, Principal Financial Officer

**Date:** 05/15/2026

**Signature:** /s/John M. Raczek