# EDGAR Filing Document

**Accession Number:** 0001277866
**File Stem:** 0001062993-25-016153
**Filing Date:** 2025-10
**Character Count:** 5263
**Document Hash:** d1e1a825082e5091baa80ea7a96ff92f
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001062993-25-016153.hdr.sgml**: 20251017

**ACCESSION NUMBER**: 0001062993-25-016153

**CONFORMED SUBMISSION TYPE**: 6-K

**PUBLIC DOCUMENT COUNT**: 2

**CONFORMED PERIOD OF REPORT**: 20251016

**FILED AS OF DATE**: 20251017

**DATE AS OF CHANGE**: 20251016

**FILER**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** ENDEAVOUR SILVER CORP
- **CENTRAL INDEX KEY:** 0001277866
- **STANDARD INDUSTRIAL CLASSIFICATION:** GOLD & SILVER ORES [1040]
- **ORGANIZATION NAME:** 01 Energy & Transportation
- **EIN:** 000000000
- **STATE OF INCORPORATION:** A1
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** 6-K
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-33153
- **FILM NUMBER:** 251398711

**BUSINESS ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** #1130-609 GRANVILLE STREET
- **CITY:** VANCOUVER
- **PROVINCE COUNTRY:** A1
- **BUSINESS PHONE:** 604-685-9775

**MAIL ADDRESS:**
- **ADDRESS IS A NON US LOCATION:** YES
- **STREET 1:** PO BOX 10328
- **STREET 2:** #1130-609 GRANVILLE STREET
- **CITY:** VANCOUVER
- **PROVINCE COUNTRY:** A1

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** ENDEAVOUR GOLD CORP
- **DATE OF NAME CHANGE:** 20040128

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**UNITED STATES<br>SECURITIES AND EXCHANGE COMMISSION**<br>Washington, D.C. 20549

**FORM 6-K**

**REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 <br>UNDER THE SECURITIES EXCHANGE ACT OF 1934**

For the month of <u>**October 2025**</u>

Commission File Number: <u>**001-33153**</u>

**<u>ENDEAVOUR SILVER CORP.</u>**<br>(Translation of registrant's name into English)

**#1130-609 Granville Street <br><u>Vancouver, British Columbia, Canada V7Y 1G5</u>** <br>(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

[ ] Form 20-F [ x ] Form 40-F

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Incorporated by Reference

*"Exhibit 99.1 to this Form 6-K of Endeavour Silver Corp. (the "Company") is hereby incorporated by reference as an exhibit to the Registration Statement on Form F-10 (File No. **333-287602**) of the Company, as amended or supplemented."*

**<u>SUBMITTED HEREWITH</u>**

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| | |
|:---|:---|
| **Exhibit** | **Description** |
| [99.1](exhibit99-1.htm) | [Material Change Report dated October 16, 2025](exhibit99-1.htm) |

---

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**<u>SIGNATURES</u>**

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

---

| | | |
|:---|:---|:---|
|  | **Endeavour Silver Corp.** | **Endeavour Silver Corp.** |
|  | (Registrant) | (Registrant) |
| Date: October 16, 2025 | By: | */s/ Daniel Dickson* |
|  |  | Daniel Dickson |
|  | Title: | CEO |

---

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## Exhibit 99.1

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**Form 51-102F3**

**MATERIAL CHANGE REPORT**

**Item 1. Name and Address of Reporting Issuer**

Endeavour Silver Corp. (the "**Company**" or "**Endeavour**")

Suite 1130 - 609 Granville Street

Vancouver, British Columbia

V7Y 1G5

**Item 2. Date of Material Change**

October 16, 2025

**Item 3. News Release**

A news release describing the material change was disseminated by the Company on October 16, 2025 through GlobeNewswire and a copy was subsequently filed on SEDAR+.

**Item 4. Summary of Material Change**

On October 16, 2025, the Company announced that it had achieved commercial production at the Terronera mine ("**Terronera**") located in Jalisco state, Mexico, effective October 1, 2025.

**Item 5. Full Description of Material Change**

**5.1 Full Description of Material Change**

On October 16, 2025, the Company announced that it had achieved commercial production at Terronera, effective October 1, 2025.

The declaration of commercial production at Terronera came after a successful commissioning phase during which both mining and processing operations were ramped up to consistently exceed an average of 90% of the designed nameplate capacity of 2,000 tonnes per day, while also achieving at least 90% of the projected metal recoveries.

Terronera demonstrated remarkable progress, operating for 100 days since July 1, 2025, with eight days of downtime, and sustained strong metal recoveries since mid-August.

The Company forecasted throughput of approximately 360,000 tonnes over the next six months, with average grades estimated at 122 g/t silver and 2.52 g/t gold. Higher grade zones are scheduled to be accessed by mid-2026, which is expected to further enhance production. The Company also announced that its management plans to issue annualized 2026 production and cost guidance for the Terronera mine in January 2026.

**5.2 Disclosure for Restructuring Transaction**

Not applicable.

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**Item 6. Reliance on subsection 7.1(2) of National Instrument 51-102**

Not applicable.

**Item 7. Omitted Information**

No information has been omitted on the basis that it is confidential information.

**Item 8. Executive Officer**

The name and business number of the executive officer of the Company who is knowledgeable of the material change and this report is:

Elizabeth Senez <br>Chief Financial Officer<br>Tel: 236-558-7168

**Item 9. Date of Report**

October 16, 2025

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