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Endeavour Silver cuts Guanacevi processing for repairs

Endeavour Silver temporarily cuts Guanacevi mill throughput nearly in half for about three weeks while repairs are completed, but mining continues.

(Neutral)
(Neutral)
Form Type
6-K

Rhea-AI Filing Summary

ENDEAVOUR SILVER CORP (EXK) reports a temporary reduction in processing capacity at its Guanacevi Mine due to a mechanical issue with the primary ball mill, which has been taken offline as of September 21, 2026. The company plans to replace the mill head and trunnion, with both components already available on site, and expects repairs to be completed in approximately three weeks while working with third-party service providers to expedite the work.

During the repair period, the regrind circuit will operate at a reduced throughput of 600 tonnes per day, compared to ordinary course capacity of approximately 1,100 tonnes per day, while mining operations continue uninterrupted. Management states that the cost of replacing the affected components is expected to be minimal because the necessary parts are already in inventory at the mine.

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Reduced throughput during repairs 600 tonnes per day Regrind circuit capacity at Guanacevi during primary mill outage
Ordinary course throughput 1,100 tonnes per day Typical Guanacevi processing capacity in normal operations
Expected repair duration Approximately 3 weeks Time Endeavour Silver anticipates to complete Guanacevi mill repairs
Primary mill offline date September 21, 2026 Date the Guanacevi primary ball mill was taken offline
Number of operating mines 3 mines Endeavour Silver’s operating mines in Mexico and Peru
primary ball mill technical
"a mechanical issue affecting the primary ball mill at its Guanacevi Mine"
regrind circuit technical
"the regrind circuit will be configured to operate at a reduced throughput"
A regrind circuit is a recycling step inside a processing plant where material that didn’t reach the required fineness or quality is sent back to be ground or milled finer. It is used in industries like mining and plastics recycling to improve product purity, recovery rates and consistency; think of it as a second pass that tightens quality control. Investors watch it because the circuit affects output, yield and operating costs, which influence revenue and margins.
tonnes per day financial
"reduced throughput of 600 tonnes per day (tpd), compared to ordinary course capacity"
Tonnes per day is a measure of how much material — such as minerals, oil, chemicals, or waste — is processed, produced or moved each day, expressed in metric tons. Investors use it like the speedometer of an operation: higher tonnes-per-day capacity usually means more potential sales, revenue and economies of scale, while declines or bottlenecks can signal production problems and affect a company’s cash flow and valuation.
forward-looking statements regulatory
"This news release contains “forward-looking statements” within the meaning"
Forward-looking statements are predictions or plans that companies share about what they expect to happen in the future, like estimating sales or profits. They matter because they help investors understand a company's outlook, but since they are based on guesses and assumptions, they can sometimes be wrong.
all in sustaining costs financial
"anticipated costs and all in sustaining costs; as well as those factors"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What issue did EXK report at the Guanacevi Mine?

Endeavour Silver reported a mechanical issue affecting the primary ball mill at its Guanacevi Mine. The mill was taken offline on September 21, 2026 so the mill head and trunnion can be replaced, both of which are already available on site.

How long does EXK expect Guanacevi mill repairs to take?

Endeavour Silver expects repairs at the Guanacevi mill to be completed in approximately three weeks. The company is coordinating with third-party service providers to expedite the replacement of the mill head and trunnion during this period.

How much is Guanacevi processing capacity reduced for EXK?

During repairs, the Guanacevi Mine’s regrind circuit will operate at 600 tonnes per day, compared to ordinary course capacity of approximately 1,100 tonnes per day, resulting in a significant temporary reduction in processing throughput.

Will mining operations at EXK’s Guanacevi Mine stop during repairs?

No. Endeavour Silver states that mining operations will continue uninterrupted at the Guanacevi Mine while the primary ball mill is offline and repairs are carried out using the reconfigured regrind circuit at reduced throughput.

What cost impact does EXK expect from the Guanacevi mill repairs?

The company states that the cost of replacing the affected mill components is expected to be minimal, since the necessary parts, including the mill head and trunnion, are already in inventory on site at the Guanacevi Mine.

Does EXK comment on production impact from reduced capacity at Guanacevi?

Endeavour Silver includes forward-looking statements about expected impact on Q3 production at Guanacevi, indicating that reduced capacity may affect production levels, while also noting risks that actual results could differ materially from these expectations.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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

Form 6-K

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

For the month of September 2026

Commission File Number: 001-33153

Endeavour Silver Corp.
(Translation of registrant's name into English)

#1130-609 Granville Street
Vancouver, British Columbia, Canada V7Y 1G5

(Address of principal executive office)

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

 

 


SIGNATURES

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.    
  (Registrant)
   
  
Date: September 22, 2026     /s/ DAN DICKSON    
  Dan Dickson
  CEO
  


EXHIBIT INDEX 

Exhibit Number Description
   
99.1 Press Release dated September 22, 2026

EXHIBIT 99.1

Endeavour Silver Reports Temporary Reduced Capacity at its Guanacevi Mine

VANCOUVER, British Columbia, Sept. 22, 2026 (GLOBE NEWSWIRE) -- Endeavour Silver Corp. (“Endeavour” or the “Company”) (NYSE: EXK; TSX: EDR) has identified a mechanical issue affecting the primary ball mill at its Guanacevi Mine.

The mill has been taken offline as of September 21, while preparations are completed to replace the mill head and trunnion, both of which are available on site. The Company expects the repairs to be completed within approximately three weeks and is coordinating with third-party service providers to expedite the replacement.

During the repair period, the regrind circuit will be configured to operate at a reduced throughput of 600 tonnes per day (tpd), compared to ordinary course capacity of approximately 1,100 tpd.

Mining operations will continue uninterrupted. The cost of replacing the affected components is expected to be minimal, as the necessary parts are already in inventory on site.

About Endeavour Silver – Endeavour is a mid-tier silver producer with three operating mines in Mexico and Peru and a robust pipeline of exploration projects across Mexico, Chile, and the United States. With a proven track record of discovery, development, and responsible mining, Endeavour is driving organic growth and creating lasting value on its path to becoming a leading senior silver producer.

Contact Information

Allison Pettit
Vice President, Investor Relations
Email: apettit@edrsilver.com
Website: www.edrsilver.com

Cautionary Note Regarding Forward-Looking Statements

This news release contains “forward-looking statements” within the meaning of the United States private securities litigation reform act of 1995 and “forward-looking information” within the meaning of applicable Canadian securities legislation. Such forward-looking statements and information herein include but are not limited to statements regarding the suspension of processing at Guanacevi, timing for completion of repairs at the Guanacevi mill, the availability and assessment of alternative processing methods, the volume of throughput achievable through the secondary circuit, and the expected impact of this reduced capacity on Q3 production at Guanacevi. The Company does not intend to and does not assume any obligation to update such forward-looking statements or information, other than as required by applicable law.

Forward-looking statements or information involve known and unknown risks, uncertainties and other factors that may cause the actual results, level of activity, production levels, performance or achievements of Endeavour and its operations to be materially different from those expressed or implied by such statements. Such risk factors include but are not limited to the failure to complete repairs at the Guanacevi mill in a timely manner and at the expected nominal cost, the effectiveness of alternative processing methods, adverse changes in commodity prices, greater than anticipated adverse impact on annual production levels, anticipated costs and all in sustaining costs; as well as those factors described in the section “risk factors” contained in the Company’s most recent form 40F/Annual Information Form filed with the S.E.C. and Canadian securities regulatory authorities.

Forward-looking statements are based on assumptions management believes to be reasonable, including but not limited to: the ability to complete repairs at the Guanacevi mill in a timely manner, the availability of alternative processing methods, the continued operation of the Company’s mining operations, and such other assumptions and factors as set out herein. Although the Company has attempted to identify important factors that could cause actual results to differ materially from those contained in forward-looking statements or information, there may be other factors that cause results to be materially different from those anticipated, described, estimated, assessed or intended. There can be no assurance that any forward-looking statements or information will prove to be accurate as actual results and future events could differ materially from those anticipated in such statements or information. Accordingly, readers should not place undue reliance on forward-looking statements or information.

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