![John F. Ambruz](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>)
John F. Ambruz
Director/Board Member at
China Mining Resources Holdings Ltd.
Net worth: 6 550 $ as of Today
Profile
John F.
Ambruz is currently a Director at China Mining Resources Holdings Ltd. since 2007 and a Director at China Resources Development, Inc. since 2011.
Previously, he worked as a Managing Director at Barclays de Zoete Wedd Ltd. and Wood Gundy.
He also served as an Executive Vice President-Strategic Development at Masonite International Corp.
from 1991 to 2006 and as a Managing Member at The Great Circle Group LLC from 1983 to 1998.
Ambruz holds an MBA from the University of Pennsylvania and an undergraduate degree from McMaster University.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
China Mining Resources Holdings Ltd.
 China Mining Resources Holdings Ltd. Other Metals/MineralsNon-Energy Minerals Part of Tongguan Gold Group Ltd., China Mining Resources Holdings Ltd. is a company based in Hong Kong, China. Seng Leong Lee has been the CEO of the Chinese company since 2007. 26.2% | 25/04/2008 | 655,000 ( 26.2% ) | 6 550 $ | 31/03/2008 |
China Resources Development, Inc.
 China Resources Development, Inc. MiscellaneousMiscellaneous Operates as a development stage company -.--% | 30/03/2012 | 317,208 ( -.--% ) | - $ | Today |
John F. Ambruz active positions
| Companies | Position | Start |
|---|---|---|
China Mining Resources Holdings Ltd.
China Mining Resources Holdings Ltd. Other Metals/MineralsNon-Energy Minerals Part of Tongguan Gold Group Ltd., China Mining Resources Holdings Ltd. is a company based in Hong Kong, China. Seng Leong Lee has been the CEO of the Chinese company since 2007. | Director/Board Member | 01/11/2007 |
China Resources Development, Inc.
China Resources Development, Inc. MiscellaneousMiscellaneous Operates as a development stage company | Director/Board Member | 01/01/2011 |
Former positions of John F. Ambruz
| Companies | Position | End |
|---|---|---|
Masonite International Corp. /Old/
 Masonite International Corp. /Old/ Building ProductsProducer Manufacturing Manufactures and distributes wood and steel doors | Corporate Officer/Principal | 01/05/2006 |
The Great Circle Group LLC
 The Great Circle Group LLC The private company is based in New York, NY. The company was formed through the merger of Navtronics and Electronics Unlimited, both providers in the marine technology industry. The company focuses on marine technology sales and service and has expanded its presence to locations including Cape Cod and Martha’s Vineyard, emphasizing growth and enhanced service in the marine technology sector. The Great Circle Group LLC was founded in 2025. | Corporate Officer/Principal | 01/05/1998 |
Wood Gundy
 Wood Gundy Investment Banks/BrokersFinance Provides securities brokerage services | Corporate Officer/Principal | - |
Barclays de Zoete Wedd Ltd.
 Barclays de Zoete Wedd Ltd. Major BanksFinance National Commercial Banks | Corporate Officer/Principal | - |
Training of John F. Ambruz
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
17
1st degree connections
8
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 8 |
|---|---|
Masonite International Corp. /Old/
Masonite International Corp. /Old/ Building ProductsProducer Manufacturing Manufactures and distributes wood and steel doors | Producer Manufacturing |
China Mining Resources Holdings Ltd.
China Mining Resources Holdings Ltd. Other Metals/MineralsNon-Energy Minerals Part of Tongguan Gold Group Ltd., China Mining Resources Holdings Ltd. is a company based in Hong Kong, China. Seng Leong Lee has been the CEO of the Chinese company since 2007. | Non-Energy Minerals |
China Resources Development, Inc.
China Resources Development, Inc. MiscellaneousMiscellaneous Operates as a development stage company | Miscellaneous |
University of Pennsylvania
 University of Pennsylvania Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Barclays de Zoete Wedd Ltd.
Barclays de Zoete Wedd Ltd. Major BanksFinance National Commercial Banks | Finance |
Wood Gundy
Wood Gundy Investment Banks/BrokersFinance Provides securities brokerage services | Finance |
McMaster University
 McMaster University Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
The Great Circle Group LLC
The Great Circle Group LLC The private company is based in New York, NY. The company was formed through the merger of Navtronics and Electronics Unlimited, both providers in the marine technology industry. The company focuses on marine technology sales and service and has expanded its presence to locations including Cape Cod and Martha’s Vineyard, emphasizing growth and enhanced service in the marine technology sector. The Great Circle Group LLC was founded in 2025. |
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