# EDGAR Filing Document

**Accession Number:** 0001101680
**File Stem:** 0001193125-25-322392
**Filing Date:** 2025-12
**Character Count:** 7807
**Document Hash:** 31d4684958ce6b63eb80b192ce30fc00
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001193125-25-322392.hdr.sgml**: 20251217

**ACCESSION NUMBER**: 0001193125-25-322392

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 2

**FILED AS OF DATE**: 20251217

**DATE AS OF CHANGE**: 20251217

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DZS INC.
- **CENTRAL INDEX KEY:** 0001101680
- **STANDARD INDUSTRIAL CLASSIFICATION:** TELEPHONE & TELEGRAPH APPARATUS [3661]
- **ORGANIZATION NAME:** 04 Manufacturing
- **EIN:** 223509099
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-61973
- **FILM NUMBER:** 251578295

**BUSINESS ADDRESS:**
- **STREET 1:** 5700 TENNYSON PARKWAY
- **STREET 2:** SUITE 400
- **CITY:** PLANO
- **STATE:** TX
- **ZIP:** 75024
- **BUSINESS PHONE:** 4693271531

**MAIL ADDRESS:**
- **STREET 1:** 5700 TENNYSON PARKWAY
- **STREET 2:** SUITE 400
- **CITY:** PLANO
- **STATE:** TX
- **ZIP:** 75024

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** DASAN ZHONE SOLUTIONS INC
- **DATE OF NAME CHANGE:** 20160912

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ZHONE TECHNOLOGIES INC
- **DATE OF NAME CHANGE:** 20031114

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** TELLIUM INC
- **DATE OF NAME CHANGE:** 20000911
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** DASAN NETWORKS, INC
- **CENTRAL INDEX KEY:** 0001606408

**ORGANIZATION NAME:**
- **EIN:** 000000000
- **STATE OF INCORPORATION:** M5
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** DASAN TOWER, 49, DAEWANGPANGYO-RO
- **STREET 2:** 644 BEON-GIL, BUNDANG-GU
- **CITY:** SEONGNAM-SI GYEONGGI-DO
- **STATE:** M5
- **ZIP:** 13493
- **BUSINESS PHONE:** 82-70-7010-1644

**MAIL ADDRESS:**
- **STREET 1:** DASAN TOWER, 49, DAEWANGPANGYO-RO
- **STREET 2:** 644 BEON-GIL, BUNDANG-GU
- **CITY:** SEONGNAM-SI GYEONGGI-DO
- **STATE:** M5
- **ZIP:** 13493

### Attached PDF Documents

**Attachment 1:** `ck0000000000-ex99_a.pdf`

_No text found in this document._

### UNITED STATES SECURITIES AND EXCHANGE COMMISSION
**Washington, D.C. 20549**

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 3)**

**DZS INC.**

*(Name of Issuer)*

**Common Stock, par value $0.001 per share**

*(Title of Class of Securities)*

**23305L107**

*(CUSIP Number)*

**SoonHo Kim**<br>DTC Tower, 49 Daewangpangyo-ro<br>644Beon-gil, Bundang-gu<br>Seongnam-si M5 13493<br>82-70-7010-1000

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**12/04/2025**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **23305L107** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**DASAN Networks, Inc.** | Name of reporting person<br>**DASAN Networks, Inc.** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**M5** | Citizenship or place of organization<br>**M5** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**0.00** | Aggregate amount beneficially owned by each reporting person<br>**0.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**0%** | Percent of class represented by amount in Row (11)<br>**0%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Comment for Reporting Person:** The percentage is calculated based on 38,789,398 shares of common stock, par value $0.001 per share (the "Common Stock"), of DZS Inc. (the "Issuer") outstanding as of October 31, 2024, as reported in the Issuer's Form 10-Q for the quarter ended September 30, 2024 filed with the Securities and Exchange Commission (the "SEC") on November 12, 2024.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Common Stock, par value $0.001 per share

**(b) Name of Issuer:**
DZS INC.

**(c) Address of Issuer's Principal Executive Offices:**
5700 TENNYSON PARKWAY, SUITE 400, PLANO, TX, 75024

Explanatory Note

This Amendment No. 3 to statement on Schedule 13D (this "Amendment No. 3") amends and supplements the Schedule 13D filed with the SEC on September 14, 2016 (as amended and supplemented by Amendment No. 1 to the statement on Schedule 13D filed with the SEC on February 5, 2021 and Amendment No. 2 to the statement on Schedule 13D filed with the SEC on November 21, 2022, collectively, the "Prior Schedule 13D," and as amended and supplemented by this Amendment No. 3, the "Schedule 13D"), and is being filed on behalf of the Reporting Person in respect of the Common Stock of the Issuer.

Except as amended and supplemented herein, the information set forth in the Prior Schedule 13D remains unchanged. Capitalized terms used but not defined in this Amendment No. 3 have the respective meanings set forth in the Prior Schedule 13D.

**Item 4. Purpose of Transaction**

Item 4 of Schedule 13D is hereby amended and supplemented as follows:

On December 4, 2025, the Reporting Person executed a sale of all of its 9,093,015 shares of Common Stock at a price per share of approximately $0.000074641 in a privately negotiated transaction (the "Disposition"). The sale price per share is in US Dollars and reflects the conversion of South Korean Won to USD at an exchange rate of $0.0006787 to South Korean Won 1.00 as of December 4, 2025.

**Item 5. Interest in Securities of the Issuer**

**(a)**
Item 5 of Schedule 13D is hereby amended and restated in its entirety as follows:

The information contained on the cover pages is incorporated by reference to this Item 5.

**(b)**
The information contained on the cover pages is incorporated by reference to this Item 5.

**(c)**
Except as otherwise described in this Schedule 13D, the Reporting Person has not effected any transactions in the Common Stock or other equity securities of the Issuer during the last 60 days.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

Item 6 of the Schedule 13D is hereby amended and supplemented by the following: The information set forth in Item 4 of this Schedule 13D is incorporated into this Item 6 by reference.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** DASAN Networks, Inc.

**Signature:** /s/ Min Woo Nam

**Name/Title:** Min Woo Nam, Chief Executive Officer

**Date:** 12/17/2025