# EDGAR Filing Document

**Accession Number:** 0001579982
**File Stem:** 0001213900-26-000098
**Filing Date:** 2026-1
**Character Count:** 3660
**Document Hash:** 2ff4a854a04a288be7a1114768f56e51
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001213900-26-000098.hdr.sgml**: 20260102

**ACCESSION NUMBER**: 0001213900-26-000098

**CONFORMED SUBMISSION TYPE**: 497

**PUBLIC DOCUMENT COUNT**: 1

**FILED AS OF DATE**: 20260102

**DATE AS OF CHANGE**: 20260102

**EFFECTIVENESS DATE**: 20260102

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ARK ETF Trust
- **CENTRAL INDEX KEY:** 0001579982

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 0831

**FILING VALUES:**
- **FORM TYPE:** 497
- **SEC ACT:** 1933 Act
- **SEC FILE NUMBER:** 333-191019
- **FILM NUMBER:** 26500443

**BUSINESS ADDRESS:**
- **STREET 1:** 155 WEST 19TH STREET, FIFTH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10011
- **BUSINESS PHONE:** 212.426.7040

**MAIL ADDRESS:**
- **STREET 1:** 155 WEST 19TH STREET, FIFTH FLOOR
- **CITY:** NEW YORK
- **STATE:** NY
- **ZIP:** 10011

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Ark ETF Trust
- **DATE OF NAME CHANGE:** 20130624

## Series and Classes Contracts Data

### ARK DIET Q1 Buffer ETF (Series ID: S000095343)

---

|  |  |  |
|:---|:---|:---|
| Class Name             | Ticker Symbol | Class ID   |
| ARK DIET Q1 Buffer ETF | ARKD          | C000264062 |

---

### ARK DIET Q4 Buffer ETF (Series ID: S000095346)

---

|  |  |  |
|:---|:---|:---|
| Class Name             | Ticker Symbol | Class ID   |
| ARK DIET Q4 Buffer ETF | ARKT          | C000264065 |

---

## Series and Classes Contracts Data

### ARK DIET Q1 Buffer ETF (Series ID: S000095343)

| Class ID   | Class Name             | Ticker Symbol   |
|:---|:---|:---|
| C000264062 | ARK DIET Q1 Buffer ETF | ARKD            |

### ARK DIET Q4 Buffer ETF (Series ID: S000095346)

| Class ID   | Class Name             | Ticker Symbol   |
|:---|:---|:---|
| C000264065 | ARK DIET Q4 Buffer ETF | ARKT            |

**ARK ETF TRUST**

**ARK DIET Q1 Buffer ETF (ARKD)**

**ARK DIET Q4 Buffer ETF (ARKT)**

*Supplement dated January 2, 2026 to the* 

*Prospectus and Summary Prospectuses for the ARK ETF Trust*

*(the "Trust"), each dated September 25, 2025*

 

This Supplement updates certain information contained in the Summary Prospectuses and Prospectus with respect to each of the following series of the Trust: ARK DIET Q1 Buffer ETF and ARK DIET Q4 Buffer ETF (each, a "Fund", and together, the "Funds"). You may obtain copies of each Fund's Summary Prospectus, Prospectus and SAI free of charge, upon request, by calling toll-free 855-406-1506, sending an email request to info@ark-invest.com or writing to ARK Investment Management LLC, 200 Central Avenue, Suite 220, St. Petersburg, Florida 33701.

As described in each Fund's Summary Prospectus and the Funds' Prospectus, the participation rate (i.e., the rate of participation in the upside share price return of the ARK Innovation ETF after the Hurdle) for a given Outcome Period is determined prior to each Outcome Period by the Sub-Adviser.

A new Investment Period for the ARK DIET Q1 Buffer ETF began as of January 2, 2026 and will end on December 31, 2026. A table stating the participation rate for the current Outcome Period for each Fund is set forth below.

---

| | | | | |
|:---|:---|:---|:---|:---|
| | **Outcome <br> Period Start** | **Outcome <br> Period End** | **Participation Rate (before Fund <br> fees and expenses)** | **Participation Rate (after Fund <br> fees and expenses)** |
| ARK DIET Q1 Buffer ETF (ARKD) | January 2, 2026 | December 31, 2026 | 61.75% | 61.20% |
| ARK DIET Q4 Buffer ETF (ARKT) | October 1, 2025 | September 30, 2026 | 63.72% | 63.15% |

---

**Please retain this supplement for future reference.**