# EDGAR Filing Document

**Accession Number:** 0001761055
**File Stem:** 0001193125-23-067575
**Filing Date:** 2023-3
**Character Count:** 5613
**Document Hash:** 39fe4872d9526d8477be1c05fec561a8
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-067575.hdr.sgml**: 20230310

**ACCESSION NUMBER**: 0001193125-23-067575

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230310

**DATE AS OF CHANGE**: 20230310

**EFFECTIVENESS DATE**: 20230310

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BlackRock ETF Trust
- **CENTRAL INDEX KEY:** 0001761055
- **IRS NUMBER:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0731

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-228832
- **FILM NUMBER:** 23723591

**BUSINESS ADDRESS:**
- **STREET 1:** 100 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809
- **BUSINESS PHONE:** 8004417762

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

## Series and Classes Contracts Data

### BlackRock Future Health ETF (Series ID: S000069260)

---

|  |  |
|:---|:---|
| Class Name                  | Class ID   |
| BlackRock Future Health ETF | C000221226 |

---

### BlackRock Future Tech ETF (Series ID: S000069261)

---

|  |  |
|:---|:---|
| Class Name                | Class ID   |
| BlackRock Future Tech ETF | C000221227 |

---

### BlackRock Future Innovators ETF (Series ID: S000069262)

---

|  |  |
|:---|:---|
| Class Name                      | Class ID   |
| BlackRock Future Innovators ETF | C000221228 |

---

### BlackRock World ex U.S. Carbon Transition Readiness ETF (Series ID: S000071282)

---

|  |  |
|:---|:---|
| Class Name                                              | Class ID   |
| BlackRock World ex U.S. Carbon Transition Readiness ETF | C000226202 |

---

### BlackRock Future Climate and Sustainable Economy ETF (Series ID: S000072413)

---

|  |  |
|:---|:---|
| Class Name                                           | Class ID   |
| BlackRock Future Climate and Sustainable Economy ETF | C000228613 |

---

### BlackRock Future Financial and Technology ETF (Series ID: S000076808)

---

|  |  |
|:---|:---|
| Class Name                                    | Class ID   |
| BlackRock Future Financial and Technology ETF | C000236859 |

---

## Series and Classes Contracts Data

### BlackRock Future Health ETF (Series ID: S000069260)

| Class ID   | Class Name                  | Ticker Symbol   |
|:---|:---|:---|
| C000221226 | BlackRock Future Health ETF |  |

### BlackRock Future Tech ETF (Series ID: S000069261)

| Class ID   | Class Name                | Ticker Symbol   |
|:---|:---|:---|
| C000221227 | BlackRock Future Tech ETF |  |

### BlackRock Future Innovators ETF (Series ID: S000069262)

| Class ID   | Class Name                      | Ticker Symbol   |
|:---|:---|:---|
| C000221228 | BlackRock Future Innovators ETF |  |

### BlackRock World ex U.S. Carbon Transition Readiness ETF (Series ID: S000071282)

| Class ID   | Class Name                                              | Ticker Symbol   |
|:---|:---|:---|
| C000226202 | BlackRock World ex U.S. Carbon Transition Readiness ETF |  |

### BlackRock Future Climate and Sustainable Economy ETF (Series ID: S000072413)

| Class ID   | Class Name                                           | Ticker Symbol   |
|:---|:---|:---|
| C000228613 | BlackRock Future Climate and Sustainable Economy ETF |  |

### BlackRock Future Financial and Technology ETF (Series ID: S000076808)

| Class ID   | Class Name                                    | Ticker Symbol   |
|:---|:---|:---|
| C000236859 | BlackRock Future Financial and Technology ETF |  |

**BlackRock ETF Trust** 

BlackRock Future Climate and Sustainable Economy ETF

BlackRock Future Financial and Technology ETF

BlackRock Future Health ETF

BlackRock Future Innovators ETF

BlackRock Future Tech ETF

BlackRock World ex U.S. Carbon Transition Readiness ETF

(each, a "Fund" and collectively, the "Funds")

**Supplement dated March 10, 2023 (the "Supplement") to the** 

**Statement of Additional Information ("SAI") of each Fund, as supplemented to date** 

**Effective immediately, each Fund's SAI is amended to add the following:** 

The Trust, on behalf of the Fund, along with certain other funds managed by BlackRock Fund Advisors and its affiliates ("Participating Funds"), is a party to a 364-day, $2.5 billion credit agreement with a group of lenders, which facility terminates on April 13, 2023, unless otherwise extended or renewed (the "Credit Agreement"). Excluding commitments designated for certain Participating Funds, the Participating Funds, including the Fund, can borrow up to an aggregate commitment amount of $1.75 billion at any time outstanding, subject to asset coverage and other limitations as specified in the Credit Agreement. The Fund may borrow under the Credit Agreement to meet shareholder redemptions and for other lawful purposes. However, the Fund may not borrow under the Credit Agreement for leverage. The Fund may borrow up to the maximum amount allowable under its current Prospectus and SAI, subject to various other legal, regulatory or contractual limits. Borrowing results in interest expense and other fees and expenses for the Fund which may impact the Fund's net expenses. The costs of borrowing may reduce the Fund's return. The Fund is charged its pro rata share of upfront fees and commitment fees on the aggregate commitment amount based on its net assets. If the Fund borrows pursuant to the Credit Agreement, the Fund will be charged interest at a variable rate.

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

SAI-ETF-0323SUP