# EDGAR Filing Document

**Accession Number:** 0001329377
**File Stem:** 0001445546-25-005252
**Filing Date:** 2025-8
**Character Count:** 6584
**Document Hash:** e956df9fcaebe430e6f0683eae1d979d
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001445546-25-005252.hdr.sgml**: 20250805

**ACCESSION NUMBER**: 0001445546-25-005252

**CONFORMED SUBMISSION TYPE**: 485BXT

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20250805

**DATE AS OF CHANGE**: 20250805

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIRST TRUST EXCHANGE-TRADED FUND
- **CENTRAL INDEX KEY:** 0001329377

**ORGANIZATION NAME:**
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** 485BXT
- **SEC ACT:** 1940 Act
- **SEC FILE NUMBER:** 811-21774
- **FILM NUMBER:** 251184551

**BUSINESS ADDRESS:**
- **STREET 1:** 120 EAST LIBERTY DRIVE, SUITE 400
- **CITY:** WHEATON
- **STATE:** IL
- **ZIP:** 60187
- **BUSINESS PHONE:** 630-765-8000

**MAIL ADDRESS:**
- **STREET 1:** 120 EAST LIBERTY DRIVE, SUITE 400
- **CITY:** WHEATON
- **STATE:** IL
- **ZIP:** 60187
**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** FIRST TRUST EXCHANGE-TRADED FUND
- **CENTRAL INDEX KEY:** 0001329377

**ORGANIZATION NAME:**
- **EIN:** 000000000

**FILING VALUES:**
- **FORM TYPE:** 485BXT
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-125751
- **FILM NUMBER:** 251184550

**BUSINESS ADDRESS:**
- **STREET 1:** 120 EAST LIBERTY DRIVE, SUITE 400
- **CITY:** WHEATON
- **STATE:** IL
- **ZIP:** 60187
- **BUSINESS PHONE:** 630-765-8000

**MAIL ADDRESS:**
- **STREET 1:** 120 EAST LIBERTY DRIVE, SUITE 400
- **CITY:** WHEATON
- **STATE:** IL
- **ZIP:** 60187

## Series and Classes Contracts Data

### First Trust Bitcoin Buffer 15 ETF - [Month] (Series ID: S000090191)

| Class ID   | Class Name                                  | Ticker Symbol   |
|:---|:---|:---|
| C000257117 | First Trust Bitcoin Buffer 15 ETF - [Month] |  |

As filed with the Securities and Exchange Commission on August 5, 2025

1933 Act Registration No. 333-125751

1940 Act Registration No. 811-21774

United States

Securities and Exchange Commission

Washington, D.C. 20549

Form N-1A <br>

---

| | |
|:---|:---|
| &nbsp;&nbsp;Registration Statement Under the Securities Act of 1933 | &nbsp;&nbsp;[ ] |
| &nbsp;&nbsp;Pre-Effective Amendment No. __ | &nbsp;&nbsp;[ ] |
| &nbsp;&nbsp;Post-Effective Amendment No. 235 | &nbsp;&nbsp;[X] |
| &nbsp;&nbsp;and/or | &nbsp;&nbsp;and/or |
| &nbsp;&nbsp;Registration Statement Under the Investment Company Act of 1940 | &nbsp;&nbsp;[ ] |
| &nbsp;&nbsp;Amendment No. 235 | &nbsp;&nbsp;[X] |

---

First Trust Exchange-Traded Fund

(Exact name of registrant as specified in charter)

120 East Liberty Drive, Suite 400

Wheaton, Illinois 60187

(Address of Principal Executive Offices) (Zip Code)

Registrant's Telephone Number, including Area Code: (800) 621-1675

W. Scott Jardine, Esq., Secretary

First Trust Exchange-Traded Fund

First Trust Advisors L.P.

120 East Liberty Drive, Suite 400

Wheaton, Illinois 60187

(Name and Address of Agent for Service)

Copy to:

Eric F. Fess, Esq.

Chapman and Cutler LLP

320 South Canal Street

Chicago, Illinois 60606

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

[ ] immediately upon filing pursuant to paragraph (b)

[X] on September 4, 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:

[X] this post-effective amendment designates a new effective date for a previously filed post-effective amendment.

Contents of Post-Effective Amendment No. 235

This Post-Effective Amendment to the Registration Statement comprises the following papers and contents:

The Facing Sheet

The sole purpose of this filing is to delay the effectiveness of the Registrant's Post-Effective Amendment No. 229, as it relates to the First Trust Bitcoin Buffer 15 ETF – [Month], a series of the Registrant, until September 4, 2025. Parts A, B and C of the Registrant's [Post-Effective Amendment No. 183](https://www.sec.gov/Archives/edgar/data/1329377/000144554624008085/etf1_485a.htm) under the Securities Act of 1933 as it relates to the First Trust Bitcoin Buffer 15 ETF – [Month], filed on July 28, 2023, are incorporated by reference herein.

Signatures

**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 of the requirements for effectiveness of this Registration Statement under Rule 485(b) under the Securities Act of 1933 and has duly caused this Registration Statement to be signed on its behalf by the undersigned, duly authorized, in the City of Wheaton, and State of Illinois, on the 5th day of August, 2025.

---

| | |
|:---|:---|
| &nbsp;&nbsp;First Trust Exchange-Traded Fund | &nbsp;&nbsp;First Trust Exchange-Traded Fund |
| &nbsp;&nbsp;By: | &nbsp;&nbsp;/s/ James M. Dykas |
|  | &nbsp;&nbsp;James M. Dykas, President and<br> Chief Executive Officer |

---

Pursuant to the requirements of the Securities Act of 1933, this Registration Statement has been signed below by the following persons in the capacities and on the date indicated:

---

| | | |
|:---|:---|:---|
| &nbsp;&nbsp;Signature |  | &nbsp;&nbsp;Date |
| &nbsp;&nbsp;/s/ James M. Dykas | &nbsp;&nbsp;President and Chief Executive<br> Officer | &nbsp;&nbsp; August 5, 2025 |
| &nbsp;&nbsp;James M. Dykas |  |  |
| &nbsp;&nbsp;/s/ Derek D. Maltbie | &nbsp;&nbsp;Treasurer, Chief Financial Officer<br> and Chief Accounting Officer | &nbsp;&nbsp; August 5, 2025 |
| &nbsp;&nbsp;Derek D. Maltbie |  |  |
| &nbsp;&nbsp;James A. Bowen\* |  |  |
| &nbsp;&nbsp;Richard E. Erickson\* |  |  |
| &nbsp;&nbsp;Thomas R. Kadlec\* |  |  |
| &nbsp;&nbsp;Denise M. Keefe\* |  |  |
| &nbsp;&nbsp;Robert F. Keith\* |  |  |
|  | &nbsp;&nbsp;By: | &nbsp;&nbsp; /s/ W. Scott Jardine |
| &nbsp;&nbsp;Niel B. Nielson\* |  | &nbsp;&nbsp;W. Scott Jardine<br> Attorney-In-Fact |
|  |  | &nbsp;&nbsp;August 5, 2025 |

---

\* Original powers of attorney dated [December 31, 2015](https://www.sec.gov/Archives/edgar/data/1329377/000144554616008279/exhibit_q.txt) or [November 1, 2021](https://www.sec.gov/Archives/edgar/data/1329377/000144554622001548/exhibit_q2.htm), authorizing James A. Bowen, W. Scott Jardine, James M. Dykas, Eric F. Fess and Kristi A. Maher to execute Registrant's Registration Statement, and Amendments thereto, for each of the trustees of the Registrant on whose behalf this Registration Statement is filed, were previously executed, filed as an exhibit and are incorporated by reference herein or filed herewith.