# EDGAR Filing Document

**Accession Number:** 0001761055
**File Stem:** 0001193125-23-060028
**Filing Date:** 2023-3
**Character Count:** 7718
**Document Hash:** deb42bdc03c3fc33df376a2ea973e140
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-23-060028.hdr.sgml**: 20230303

**ACCESSION NUMBER**: 0001193125-23-060028

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20230303

**DATE AS OF CHANGE**: 20230303

**EFFECTIVENESS DATE**: 20230303

**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:** 23704024

**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 U.S. Carbon Transition Readiness ETF (Series ID: S000071281)

---

|  |  |
|:---|:---|
| Class Name                                     | Class ID   |
| BlackRock U.S. Carbon Transition Readiness ETF | C000226201 |

---

### 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 |

---

## Series and Classes Contracts Data

### BlackRock U.S. Carbon Transition Readiness ETF (Series ID: S000071281)

| Class ID   | Class Name                                     | Ticker Symbol   |
|:---|:---|:---|
| C000226201 | BlackRock U.S. Carbon Transition Readiness 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 ETF TRUST** 

BlackRock U.S. Carbon Transition Readiness ETF

BlackRock World ex U.S. Carbon Transition Readiness ETF

(the "Funds")

**Supplement dated March 3, 2023 to the Prospectus of the Funds, dated November 28, 2022,** 

**as amended or supplemented to date** 

**Effective immediately, the following change is made to the Funds' Prospectus:** 

**The section of the Prospectus entitled "Shareholder Information—Buying and Selling Shares" is deleted in its entirety and replaced with the following:** 

**Buying and Selling Shares.** Shares of each Fund may be acquired or redeemed directly from each Fund only in Creation Units or multiples thereof, as discussed in the Creations and Redemptions section of this Prospectus. Only an Authorized Participant (as defined in the Creations and Redemptions section below) may engage in creation or redemption transactions directly with the Funds. Once created, shares of the Funds generally trade in the secondary market in amounts less than a Creation Unit.

Shares of the Funds are listed on a national securities exchange for trading during the trading day. Shares can be bought and sold throughout the trading day like shares of other publicly-traded companies. The Trust does not impose any minimum investment for shares of the Funds purchased on an exchange or otherwise in the secondary market. BlackRock U.S. Carbon Transition Readiness ETF's shares trade under the ticker symbol "LCTU" and BlackRock World ex U.S. Carbon Transition Readiness ETF's shares trade under the ticker symbol "LCTD".

While BFA has registered the Funds for marketing to professional investors in the United Kingdom under the UK AIFM Regulations, the Funds are not registered for distribution to retail investors, and do not publish key information documents for retail investors, in the United Kingdom.

Buying or selling Fund shares on an exchange or other secondary market involves two types of costs that may apply to all securities transactions. When buying or selling shares of each Fund through a broker, you may incur a brokerage commission and other charges. The commission is frequently a fixed amount and may be a significant proportional cost for investors seeking to buy or sell small amounts of shares. In addition, you may incur the cost of the "spread," that is, any difference between the bid price and the ask price. The spread varies over time for shares of each Fund based on the Funds' trading volume and market liquidity, and is generally lower if a Fund has high trading volume and market liquidity, and higher if a Fund has little trading volume and market liquidity (which is often the case for funds that are newly launched or small in size). A Fund's spread may also be impacted by the liquidity or illiquidity of the underlying securities held by the Fund, particularly for newly launched or smaller funds or in instances of significant volatility of the underlying securities.

The Board has adopted a policy of not monitoring for frequent purchases and redemptions of Fund shares ("frequent trading") that appear to attempt to take advantage of a potential arbitrage opportunity presented by a lag between a change in the value of a Fund's portfolio securities after the close of the primary markets for the Fund's portfolio securities and the reflection of that change in the Fund's NAV ("market timing"), because the Fund sells and redeems its shares directly through transactions that are in-kind and/or for cash, subject to the conditions described below under Creations and Redemptions. The Board has not adopted a policy of monitoring for other frequent trading activity because shares of each Fund are listed for trading on a national securities exchange.

The national securities exchange on which each Fund's shares are listed is open for trading Monday through Friday and is closed on weekends and the following holidays (or the days on which they are observed): New Year's Day, Martin Luther King, Jr. Day, Presidents' Day, Good Friday, Memorial Day, Juneteenth, Independence Day, Labor Day, Thanksgiving Day and Christmas Day. Each Fund's listing exchange is NYSE Arca.

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Section 12(d)(1) of the 1940 Act generally restricts investments by investment companies, including foreign and unregistered investment companies, in the securities of other investment companies. For example, a registered investment company (the "Acquired Fund"), such as the Fund, may not knowingly sell or otherwise dispose of any security issued by the Acquired Fund to any investment company (the "Acquiring Fund") or any company or companies controlled by the Acquiring Fund if, immediately after such sale or disposition: (i) more than 3% of the total outstanding voting stock of the Acquired Fund is owned by the Acquiring Fund and any company or companies controlled by the Acquiring Fund, or (ii) more than 10% of the total outstanding voting stock of the Acquired Fund is owned by the Acquiring Fund and other investment companies and companies controlled by them. However, registered investment companies are permitted to invest in the Fund beyond the limits set forth in Section 12(d)(1), subject to certain terms and conditions set forth in SEC rules. In order for a registered investment company to invest in shares of the Fund beyond the limitations of Section 12(d)(1) in reliance on Rule 12d1-4 under the 1940 Act, the registered investment company must, among other things, enter into an agreement with the Trust. Foreign investment companies are permitted to invest in the Fund only up to the limits set forth in Section 12(d)(1), subject to any applicable SEC no-action relief.

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

PRO-CARB-0323SUP