# EDGAR Filing Document

**Accession Number:** 0001804196
**File Stem:** 0001193125-25-230336
**Filing Date:** 2025-10
**Character Count:** 4174
**Document Hash:** 23589a6e46b142a9b50d43b627d60d16
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-230336.hdr.sgml**: 20251003

**ACCESSION NUMBER**: 0001193125-25-230336

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251003

**DATE AS OF CHANGE**: 20251003

**EFFECTIVENESS DATE**: 20251003

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BlackRock ETF Trust II
- **CENTRAL INDEX KEY:** 0001804196

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0731

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-236575
- **FILM NUMBER:** 251374589

**BUSINESS ADDRESS:**
- **STREET 1:** 100 BELLEVUE PARKWAY
- **CITY:** WILMINGTON
- **STATE:** DE
- **ZIP:** 19809
- **BUSINESS PHONE:** 800 882 0052

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

## Series and Classes Contracts Data

### iShares Total Return Active ETF (Series ID: S000083073)

---

|  |  |
|:---|:---|
| Class Name                      | Class ID   |
| iShares Total Return Active ETF | C000246586 |

---

## Series and Classes Contracts Data

### iShares Total Return Active ETF (Series ID: S000083073)

| Class ID   | Class Name                      | Ticker Symbol   |
|:---|:---|:---|
| C000246586 | iShares Total Return Active ETF |  |

**BLACKROCK ETF TRUST II** 

iShares Total Return Active ETF

**(the "Fund")** 

**Supplement dated October 3, 2025 (the "Supplement")**

**to the Fund's Prospectus, dated November 27, 2024, as supplemented to date** 

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

**The section of the Prospectus entitled "More Information About the Fund — Other Strategies" is amended to add the following as an other strategy of the Fund:** 

&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;• **Short Sales —** The Fund may engage in short sales, which are transactions in which the Fund sells
securities borrowed from others with the expectation that the price of the security will fall before the Fund must purchase the security to return it to the lender. The Fund may make short sales of securities, either as a hedge against potential
declines in value of a portfolio security or to realize appreciation when a security that the Fund does not own declines in value. The Fund will not make a short sale if, after giving effect to such sale, the market value of all securities sold
short exceeds 10% of the value of its total assets. However, the Fund may make short sales "against-the-box" without regard to this restriction. In this type of short sale, at the time of the sale, the Fund owns or has the immediate and
unconditional right to acquire the identical security at no additional cost.

**The section of the Prospectus entitled "More Information About the Fund — A Further Discussion of Other Risks" is amended to add the following as an other risk of the Fund:** 

***Short Sales Risk* —** Because making short sales in securities that it does not own exposes the Fund to the risks associated with those securities, such short sales involve speculative exposure risk. The Fund will incur a loss as a result of a short sale if the price of the security increases between the date of the short sale and the date on which the Fund replaces the security sold short. The Fund will realize a gain if the security declines in price between those dates. As a result, if the Fund makes short sales in securities that increase in value, it will likely underperform similar funds that do not make short sales in securities they do not own. There can be no assurance that the Fund will be able to close out a short sale position at any particular time or at an acceptable price. Although the Fund's gain is limited to the amount at which it sold a security short, its potential loss is limited only by the maximum attainable price of the security, less the price at which the security was sold. The Fund may also pay transaction costs and borrowing fees in connection with short sales.

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

PRO-BRTR-1025SUP