![Duncan Middlemiss](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Duncan Middlemiss
Chief Executive Officer at
ARIZONA METALS CORP.
Net worth: 272 676 $ as of 31/05/2026
Profile
Duncan Middlemiss is currently President, Chief Executive Officer & Director at Arizona Metals Corp.
since 2024.
Mr. Middlemiss is also an Independent Director at West Red Lake Gold Mines Ltd. since 2023, an Independent Director at Osisko Development Corp.
since 2020, and a Member of Professional Engineers Ontario.
Formerly, Mr. Middlemiss was President, Chief Executive Officer & Director at St. Andrew Goldfields Ltd. from 2013 to 2016.
Mr. Middlemiss was President, CEO & Non-Independent Director at Wesdome Gold Mines Ltd. from 2016 to 2023.
Mr. Middlemiss served as Chairman of the Ontario Mining Association.
Mr. Middlemiss was Director at EPC Canada Explosives Ltd. from 2015 to 2016.
Mr. Middlemiss was Independent Director at IDM Mining Ltd. from 2017 to 2019.
Mr. Middlemiss held the position of Manager-Engineering & Production at Kirkland Lake Gold, Inc. Mr. Middlemiss was Chief Mine Engineer at Barrick Mining Corp.
from 1995 to 2002.
Mr. Middlemiss was Manager-Engineering & Production at Macassa Gold Mines Ltd. Mr. Middlemiss was a Member of the Institute of Corporate Directors.
Mr. Middlemiss completed undergraduate education at Queen's University in 1989.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
ARIZONA METALS CORP 0.57% | 22/05/2026 | 790,012 ( 0.57% ) | 129 562 $ | 31/05/2026 |
| 13/05/2025 | 33,255 ( 0.01% ) | 93 114 $ | 31/05/2026 | |
| 05/02/2026 | 100,000 ( 0.02% ) | 50 000 $ | 31/05/2026 |
Duncan Middlemiss active positions
| Companies | Position | Start |
|---|---|---|
| OSISKO DEVELOPMENT CORP. | Director/Board Member | 25/11/2020 |
| WEST RED LAKE GOLD MINES | Director/Board Member | 06/06/2023 |
| ARIZONA METALS CORP. | Chief Executive Officer | 16/05/2024 |
Professional Engineers Ontario
 Professional Engineers Ontario Engineering & ConstructionIndustrial Services Provides professional engineering services | Corporate Officer/Principal | - |
Former positions of Duncan Middlemiss
| Companies | Position | End |
|---|---|---|
| WESDOME GOLD MINES LTD. | Chief Executive Officer | 24/01/2023 |
| IDM MINING LTD | Director/Board Member | 01/01/2019 |
EPC Canada Explosives Ltd. (Canada)
 EPC Canada Explosives Ltd. (Canada) Industrial SpecialtiesProcess Industries Manufactures explosives for mining, quarrying and road construction | Director/Board Member | 18/08/2016 |
| ST ANDREW GOLDFIELDS LTD | Chief Executive Officer | 01/01/2016 |
| BARRICK MINING CORPORATION | Corporate Officer/Principal | 01/01/2002 |
Training of Duncan Middlemiss
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
70
1st degree connections
14
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 14 |
|---|---|
Kirkland Lake Gold, Inc.
 Kirkland Lake Gold, Inc. Precious MetalsNon-Energy Minerals Engages in gold mining and milling operations | Non-Energy Minerals |
St. Andrew Goldfields Ltd.
 St. Andrew Goldfields Ltd. Precious MetalsNon-Energy Minerals Explores and develops gold mining properties | Non-Energy Minerals |
West Red Lake Gold Mines Ltd.
 West Red Lake Gold Mines Ltd. Precious MetalsNon-Energy Minerals Operates as a mineral exploration company | Non-Energy Minerals |
EPC Canada Explosives Ltd. (Canada)
EPC Canada Explosives Ltd. (Canada) Industrial SpecialtiesProcess Industries Manufactures explosives for mining, quarrying and road construction | Process Industries |
IDM Mining Ltd.
 IDM Mining Ltd. Precious MetalsNon-Energy Minerals Operates as an exploration stage company that engages in the business of exploring and developing gold properties | Non-Energy Minerals |
Barrick Gold Corp.
 Barrick Gold Corp. Precious MetalsNon-Energy Minerals Engages in mining of gold and copper | Non-Energy Minerals |
Macassa Gold Mines Ltd.
 Macassa Gold Mines Ltd. Precious MetalsNon-Energy Minerals Mines for gold and silver | Non-Energy Minerals |
Queen's University
 Queen's University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Wesdome Gold Mines Ltd.
 Wesdome Gold Mines Ltd. Precious MetalsNon-Energy Minerals Explores and mines for gold | Non-Energy Minerals |
Professional Engineers Ontario
Professional Engineers Ontario Engineering & ConstructionIndustrial Services Provides professional engineering services | Industrial Services |
Institute of Corporate Directors
 Institute of Corporate Directors Miscellaneous Commercial ServicesCommercial Services Promotes governance and develops leadership skills | Commercial Services |
Ontario Mining Association
 Ontario Mining Association Other Metals/MineralsNon-Energy Minerals Provides metal ore mining services | Non-Energy Minerals |
Arizona Metals Corp.
 Arizona Metals Corp. Precious MetalsNon-Energy Minerals Provides gold mining services | Non-Energy Minerals |
Osisko Development Corp.
 Osisko Development Corp. Precious MetalsNon-Energy Minerals Mines for gold and other minerals | Non-Energy Minerals |
- Stock Market
- Insiders
- Duncan Middlemiss
