# EDGAR Filing Document

**Accession Number:** 0001761055
**File Stem:** 0001193125-25-238716
**Filing Date:** 2025-10
**Character Count:** 7155
**Document Hash:** 1a50434151ceafe7ffdab2ea0bbfa1f7
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-238716.hdr.sgml**: 20251014

**ACCESSION NUMBER**: 0001193125-25-238716

**CONFORMED SUBMISSION TYPE**: 485BXT

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20251014

**DATE AS OF CHANGE**: 20251014

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BlackRock ETF Trust
- **CENTRAL INDEX KEY:** 0001761055

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

**FILING VALUES:**
- **FORM TYPE:** 485BXT
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-23402
- **FILM NUMBER:** 251390819

**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
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BlackRock ETF Trust
- **CENTRAL INDEX KEY:** 0001761055

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

**FILING VALUES:**
- **FORM TYPE:** 485BXT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-228832
- **FILM NUMBER:** 251390818

**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

### iShares Systematic Alternatives Active ETF (Series ID: S000095901)

| Class ID   | Class Name                                 | Ticker Symbol   |
|:---|:---|:---|
| C000264683 | iShares Systematic Alternatives Active ETF |  |

**As filed with the Securities and Exchange Commission on October 14, 2025** 

**Securities Act File No. 333-228832** 

**Investment Company Act File No. 811-23402** 

**SECURITIES AND EXCHANGE COMMISSION** 

**Washington, D.C. 20549** 

**FORM N-1A** 

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| | |
|:---|:---|
| **REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933** | ☒ |
| **Pre-Effective Amendment No.** | ☐ |
| **Post-Effective Amendment No. 134** | ☒ |
| **and/or** |  |
| **REGISTRATION STATEMENT UNDER THE** |  |
| **INVESTMENT COMPANY ACT OF 1940** | ☒ |
| **Amendment No. 136** | ☒ |
| (Check appropriate box or boxes) |  |
| **BLACKROCK ETF TRUST** |  |
| *(Exact Name of Registrant as Specified in Charter)* |  |
| **100 Bellevue Parkway, Wilmington, Delaware 19809** |  |
| **United States of America** |  |
| *(Address of Principal Executive Office)* |  |
| **Registrant's Telephone Number, including Area Code: (800) 441-7762** |  |
| **John M. Perlowski** |  |
| **BLACKROCK ETF TRUST** |  |
| **50 Hudson Yards** |  |
| **New York, New York 10001** |  |
| **United States of America** |  |
| **(Name and Address of Agent for Service)** |  |
| ***Copies to:*** |  |

---

---

| | |
|:---|:---|
| **Counsel for the Fund:** |  |
| **Jesse C. Kean, Esq.** | **Janey Ahn, Esq.** |
| **Sidley Austin LLP** | **BlackRock Fund Advisors** |
| 787 Seventh Avenue | 50 Hudson Yards |
| New York, New York 10019 | New York, New York 10001 |

---

**It is proposed that this filing will become effective (check appropriate box)** 

☐ Immediately upon filing pursuant to paragraph (b)

☒ On November 7, 2025 pursuant to paragraph (b)

☐ 60 days after filing pursuant to paragraph (a)(1)

☐ On (date) pursuant to paragraph (a)(1)

☐ 75 days after filing pursuant to paragraph (a)(2)

☐ On (date) pursuant to paragraph (a)(2) of Rule 485.

**If appropriate, check the following box:**

☒ This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

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This filing relates solely to the following Fund, a series of BlackRock ETF Trust:

iShares Systematic Alternatives Active ETF

------

**Explanatory Note** 

This Post-Effective Amendment No. 134 under the Securities Act of 1933, as amended (the "Securities Act") to the registration statement on Form N-1A (the "Registration Statement") of BlackRock ETF Trust (the "Registrant") is being filed pursuant to paragraph (b)(1)(iii) of Rule 485 under the Securities Act solely for the purpose of delaying, until November 7, 2025, the effectiveness of the registration statement of iShares Systematic Alternatives Active ETF, filed in [Post-Effective Amendment No. 124 on August 1, 2025, pursuant to paragraph (a) of Rule 485 under the Securities Act.](http://www.sec.gov/Archives/edgar/data/1761055/000119312525171648/d28627d485apos.htm)

This Post-Effective Amendment No. 134 incorporates by reference the information contained in Parts A, B and C of Post-Effective Amendment No. 124 to the Registrant's Registration Statement.

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**SIGNATURES** 

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all the requirements for the effectiveness of this Post-Effective Amendment to its Registration Statement pursuant to Rule 485(b)(1)(iii) under the Securities Act of 1933 and has duly caused this Post-Effective Amendment to its Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York and the State of New York, on October 14, 2025.

---

| | |
|:---|:---|
| BLACKROCK ETF TRUST (REGISTRANT) | BLACKROCK ETF TRUST (REGISTRANT) |
| ON BEHALF OF | ON BEHALF OF |
| ISHARES SYSTEMATIC ALTERNATIVES ACTIVE ETF | ISHARES SYSTEMATIC ALTERNATIVES ACTIVE ETF |
| By: | /S/ JOHN M. PERLOWSKI |
|  | **(John M. Perlowski,**<br> **President and Chief Executive Officer)** |

---

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment to its Registration Statement has been signed below by the following persons in the capacities and on the dates indicated.

---

| | | |
|:---|:---|:---|
| Signature | Title | Date |
| /S/ JOHN M. PERLOWSKI<br> **(John M. Perlowski)** | Trustee, President and Chief Executive Officer<br> (Principal Executive Officer) | October 14, 2025 |
| /S/ TRENT WALKER <br> **(Trent Walker)** | Chief Financial Officer<br> (Principal Financial and Accounting Officer) | October 14, 2025 |
| CHRISTOPHER J. AILMAN\*<br> **(Christopher J. Ailman)** | Trustee |  |
| SUSAN J. CARTER\*<br> **(Susan J. Carter)** | Trustee |  |
| COLLETTE CHILTON\*<br> **(Collette Chilton)** | Trustee |  |
| NEIL A. COTTY\*<br> **(Neil A. Cotty)** | Trustee |  |
| HENRY R. KEIZER\*<br> **(Henry R. Keizer)** | Trustee |  |
| CYNTHIA A. MONTGOMERY\*<br> **(Cynthia A. Montgomery)** | Trustee |  |
| DONALD C. OPATRNY\*<br> **(Donald C. Opatrny)** | Trustee |  |
| LORI RICHARDS\*<br> **(Lori Richards)** | Trustee |  |
| MARK STALNECKER\*<br> **(Mark Stalnecker)** | Trustee |  |

---

------

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| | | |
|:---|:---|:---|
| Signature | Title | Date |
| KENNETH L. URISH\*<br> **(Kenneth L. Urish)** | Trustee |  |
| CLAIRE A. WALTON\*<br> **(Claire A. Walton)** | Trustee |  |
| ROBERT FAIRBAIRN\* <br> **(Robert Fairbairn)** | Trustee |  |
| \*By: /S/ JANEY AHN<br> **(Janey Ahn, Attorney-In-Fact)** |  | October 14, 2025 |

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