# EDGAR Filing Document

**Accession Number:** 0000844779
**File Stem:** 0001193125-23-047997
**Filing Date:** 2023-2
**Character Count:** 5151
**Document Hash:** d3cce3d8975cba515346612c173d5e5e
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-047997.hdr.sgml**: 20230224

**ACCESSION NUMBER**: 0001193125-23-047997

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230224

**DATE AS OF CHANGE**: 20230224

**EFFECTIVENESS DATE**: 20230224

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BLACKROCK FUNDS
- **CENTRAL INDEX KEY:** 0000844779
- **IRS NUMBER:** 510318674
- **STATE OF INCORPORATION:** MA
- **FISCAL YEAR END:** 0930

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 033-26305
- **FILM NUMBER:** 23663433

**BUSINESS ADDRESS:**
- **STREET 1:** 100 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809
- **BUSINESS PHONE:** 800-441-7762

**MAIL ADDRESS:**
- **STREET 1:** 100 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** COMPASS CAPITAL FUNDS\
- **DATE OF NAME CHANGE:** 19961114

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

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** NCP FUNDS
- **DATE OF NAME CHANGE:** 19890511

## Series and Classes Contracts Data

### iShares Russell Mid-Cap Index Fund (Series ID: S000049319)

---

|  |  |
|:---|:---|
| Class Name    | Class ID   |
| Institutional | C000155940 |
| Class K       | C000155941 |
| Investor A    | C000163604 |

---

## Series and Classes Contracts Data

### iShares Russell Mid-Cap Index Fund (Series ID: S000049319)

| Class ID   | Class Name    | Ticker Symbol   |
|:---|:---|:---|
| C000155940 | Institutional |  |
| C000155941 | Class K       |  |
| C000163604 | Investor A    |  |

**BLACKROCK FUNDS<sup>SM</sup>** 

iShares Russell Mid-Cap Index Fund

(the "Fund")

**Supplement dated February 24, 2023 to the Statement of Additional Information ("SAI") of the Fund, dated November 28, 2022** 

**Effective immediately, the following changes are made to the Fund's SAI:** 

**The section entitled "Management, Advisory and Other Service Arrangements — Information Regarding the Portfolio Managers" is revised as follows:** 

**The first paragraph is deleted in its entirety and replaced with the following:** 

Paul Whitehead, Suzanne Henige, CFA, and Jennifer Hsui, CFA are the portfolio managers and are jointly and primarily responsible for the day-to-day management of the Fund. On or about April 14, 2023, Suzanne Henige will no longer serve as a portfolio manager of the Fund.

**The sub-section entitled "Other Funds and Accounts Managed" is deleted in its entirety and replaced with the following:** 

The following table sets forth information about the funds and accounts other than the Fund for which the Fund's portfolio managers are primarily responsible for the day-to-day portfolio management as of July 31, 2022.

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| | **Number of Other Accounts Managed<br>and Assets by Account Type** | **Number of Other Accounts Managed<br>and Assets by Account Type** | **Number of Other Accounts Managed<br>and Assets by Account Type** | **Number of Other Accounts and Assets<br>for Which Advisory Fee is<br>Performance-Based** | **Number of Other Accounts and Assets<br>for Which Advisory Fee is<br>Performance-Based** | **Number of Other Accounts and Assets<br>for Which Advisory Fee is<br>Performance-Based** |
| <br>**Name of Portfolio<br>Manager** | **Other**<br>**Registered**<br>**Investment**<br>**Companies** | **Other<br>Pooled**<br>**Investment**<br>**Vehicles** | **Other**<br>**Accounts** | **Other**<br>**Registered**<br>**Investment**<br>**Companies** | **Other<br>Pooled**<br>**Investment**<br>**Vehicles** | **Other**<br>**Accounts** |
| Suzanne Henige, CFA\* | 326<br>$1.80 Trillion | 4<br>$40.78 Billion | 0<br>$0 | 0<br>$0 | 0<br>$0 | 0<br>$0 |
| Jennifer Hsui, CFA | 329<br>$1.85 Trillion | 6<br>$238.60 Million | 2<br>$296.40 Million | 0<br>$0 | 0<br>$0 | 0<br>$0 |
| Paul Whitehead | 307<br>$1.76 Trillion | 1<br>$1.78 Billion | 0<br>$0 | 0<br>$0 | 0<br>$0 | 0<br>$0 |

---

\* On or about April 14, 2023, Suzanne Henige will no longer serve as a portfolio manager of the Fund.

**The last sentence of the first paragraph of the sub-section entitled "Discretionary Incentive Compensation" is deleted in its entirety and replaced with the following:** 

The performance of Mr. Whitehead and Mses. Henige and Hsui is not measured against a specific benchmark.

------

**The sub-section entitled "Portfolio Manager Beneficial Holdings" is deleted in its entirety and replaced with the following:** 

The following table sets forth the dollar range of equity securities of the Fund beneficially owned by the portfolio managers as of July 31, 2022.

---

| | |
|:---|:---|
| **Portfolio Manager** | **Dollar Range of Equity Securities<br>Beneficially Owned** |
| Paul Whitehead | None |
| Suzanne Henige, CFA\* | None |
| Jennifer Hsui, CFA | None |

---

\* On or about April 14, 2023, Suzanne Henige will no longer serve as a portfolio manager of the Fund.

**Shareholders should retain this Supplement for future reference.** 

SAI-MCI-0223SUP