![Mark Calderwood](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>)
Mark Calderwood
Chief Executive Officer at
MIDAS MINERALS LIMITED
Net worth: 11 M $ as of 2026-08-30
Profile
Mark Andrew Calderwood is the founder of Amery Holdings Pty Ltd., founded in 1987.
Current jobs include Non-Executive Director at Pilbara Gold Ltd. since 2022, Managing Director & Director at Midas Minerals Ltd. since 2021, Director at Mount Belches Pty Ltd., and Member at Australasian Institute of Mining & Metallurgy.
Former jobs include Chief Executive Officer, Executive Director & MD at Tawana Resources Pty Ltd. from 2016 to 2018; Chief Executive Officer, Executive Director & MD at Perseus Mining Ltd. from 2003 to 2013; Chief Executive Officer at TMK Energy Ltd.; Non-Executive Chairman at Midas Minerals Ltd.; Non-Executive Director at Amani Gold Ltd. from 2014 to 2018; Non-Executive Director & Technical Director at Explaurum Ltd. from 2013 to 2016; Non-Executive Director at Turaco Gold Ltd. from 2007 to 2019; Non-Independent Non-Executive Director at Alita Resources Ltd. in 2019; Director at Lithco No 2 Pty Ltd.; Non-Executive Director at Eastern Resources Ltd. from 2023 to 2026; and Exploration Manager at Moto Goldmines Australia Pty Ltd.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-07-09 | 11,844,290 ( 4.83% ) | 11 M $ | 2026-08-30 | |
PILBARA GOLD LIMITED 0.38% | 2026-06-11 | 892,364 ( 0.38% ) | 345 336 $ | 2026-08-30 |
Mark Calderwood active positions
| Companies | Position | Start |
|---|---|---|
| PILBARA GOLD LIMITED | Director/Board Member | 2022-05-25 |
| MIDAS MINERALS LIMITED | Chief Executive Officer | 2022-06-30 |
Australasian Institute of Mining & Metallurgy
 Australasian Institute of Mining & Metallurgy Miscellaneous Commercial ServicesCommercial Services Provides services to professionals engaged in all facets of the global resources sector | Corporate Officer/Principal | 2010-12-08 |
Mount Belches Pty Ltd.
 Mount Belches Pty Ltd. Other Metals/MineralsNon-Energy Minerals Engaged in lithium mining | Director/Board Member | - |
Former positions of Mark Calderwood
| Companies | Position | End |
|---|---|---|
| EASTERN RESOURCES LIMITED | Director/Board Member | 2026-01-07 |
| TURACO GOLD LIMITED | Chairman | 2018-11-01 |
| ALIA RESONPV | Chief Executive Officer | 2019-09-19 |
| TAWANA RESOURCES N.L. | Chief Executive Officer | 2018-11-30 |
| AMANI GOLD | Director/Board Member | 2018-01-01 |
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
59
1st degree connections
15
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 15 |
|---|---|
Tawana Resources Pty Ltd.
 Tawana Resources Pty Ltd. SteelNon-Energy Minerals Engages in exploration of iron ore and metal mining activities | Non-Energy Minerals |
Perseus Mining Ltd.
 Perseus Mining Ltd. Precious MetalsNon-Energy Minerals Operates as a gold production, development and exploration company | Non-Energy Minerals |
Amani Gold Ltd.
 Amani Gold Ltd. Precious MetalsNon-Energy Minerals Engages in the acquisition and exploration of mineral properties | Non-Energy Minerals |
Moto Goldmines Australia Pty Ltd.
 Moto Goldmines Australia Pty Ltd. Precious MetalsNon-Energy Minerals Explores and mines for gold | Non-Energy Minerals |
Kairos Minerals Ltd.
 Kairos Minerals Ltd. Precious MetalsNon-Energy Minerals Explores and mines gold and base metal mineralisation | Non-Energy Minerals |
Australasian Institute of Mining & Metallurgy
Australasian Institute of Mining & Metallurgy Miscellaneous Commercial ServicesCommercial Services Provides services to professionals engaged in all facets of the global resources sector | Commercial Services |
Explaurum Ltd.
 Explaurum Ltd. Other Metals/MineralsNon-Energy Minerals Mines for gold, tin and other minerals | Non-Energy Minerals |
Turaco Gold Ltd.
 Turaco Gold Ltd. Precious MetalsNon-Energy Minerals Acquires, explores and develops gold projects | Non-Energy Minerals |
Eastern Resources Ltd.
 Eastern Resources Ltd. SteelNon-Energy Minerals Explores and mines iron ore | Non-Energy Minerals |
TMK Energy Ltd.
 TMK Energy Ltd. Oil & Gas ProductionEnergy Minerals Engages in the exploration and production of petroleum and gas properties | Energy Minerals |
Alita Resources Ltd.
 Alita Resources Ltd. Other Metals/MineralsNon-Energy Minerals Engages in the exploitation of tantalum mineral resources | Non-Energy Minerals |
Mount Belches Pty Ltd.
Mount Belches Pty Ltd. Other Metals/MineralsNon-Energy Minerals Engaged in lithium mining | Non-Energy Minerals |
Lithco No 2 Pty Ltd.
 Lithco No 2 Pty Ltd. Chemicals: AgriculturalProcess Industries Provides lithium and other minerals mining services | Process Industries |
Midas Minerals Ltd.
 Midas Minerals Ltd. Precious MetalsNon-Energy Minerals Provides gold, copper, nickel and lithium mining services | Non-Energy Minerals |
Amery Holdings Pty Ltd.
 Amery Holdings Pty Ltd. MiscellaneousMiscellaneous Functions as an investment holding company | Miscellaneous |
- Stock Market
- Insiders
- Mark Calderwood
