David Sienko

General Counsel at HECLA MINING COMPANY

Net worth: 15 M $ as of 30/06/2026

57 year

92 connections

Commercial Services

Non-Energy Minerals

Consumer Services

Profile

Mr. David C.
Sienko is a Secretary, Senior Vice President & General Counsel at Hecla Mining Co. He is on the Board of Directors at Ducks Unlimited Canada.
Mr. Sienko was previously employed as a Partner by K&L Gates LLP, an Associate by Bell, Boyd & Lloyd LLP, a Treasurer by Mining Suppliers Association of British Columbia, an Associate by Locke Lord Bissell & Liddell LLP, and a Partner by PricewaterhouseCoopers LLP.
He also served on the board at Eros Resources Corp., HudBay Minerals, Inc. /Old/ and Mercator Minerals Ltd. He received his undergraduate degree from Oberlin College and a graduate degree from Marquette University.

Known holdings in public companies

Company	Date	Number of shares	Valuation	Valuation date
HECLA MINING COMPANY 0.14%	22/06/2026	9,51,865 ( 0.14% )	15 M $	30/06/2026

David Sienko active positions

Companies	Position	Start
HECLA MINING COMPANY	General Counsel	29/01/2010
Ducks Unlimited Canada Ducks Unlimited Canada Miscellaneous Commercial ServicesCommercial Services Secures and enhances waterfowl breeding habitats	Director/Board Member	01/03/1996

All active positions of David Sienko

Former positions of David Sienko

Companies	Position	End
MERCATOR MINERALS LTD.	Director/Board Member	01/09/2014
TRIDENT RESOURCES CORP.	Director/Board Member	01/11/2013
Mining Suppliers Association of British Columbia	Treasurer	01/05/2012
Bell, Boyd & Lloyd LLP Bell, Boyd & Lloyd LLP Miscellaneous Commercial ServicesCommercial Services Provides legal services	Corporate Officer/Principal	01/01/2010
K&L Gates LLP K&L Gates LLP Miscellaneous Commercial ServicesCommercial Services Provides legal services	Corporate Officer/Principal	01/06/2006

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Training of David Sienko

Experiences
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Private companies

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Executives

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Linked companies

Private companies	12
Hecla Mining Co. Hecla Mining Co. Precious MetalsNon-Energy Minerals Mines and processes silver, gold and other nonferrous materials and industrial materials	Non-Energy Minerals
PricewaterhouseCoopers LLP PricewaterhouseCoopers LLP Miscellaneous Commercial ServicesCommercial Services Provides auditing, assurance, consulting and tax & business consulting services	Commercial Services
Mercator Minerals Ltd. Mercator Minerals Ltd. Other Metals/MineralsNon-Energy Minerals Engages in the business of mining, exploration, development and operation of mineral properties	Non-Energy Minerals
Oberlin College Oberlin College Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Bell, Boyd & Lloyd LLP Bell, Boyd & Lloyd LLP Miscellaneous Commercial ServicesCommercial Services Provides legal services	Commercial Services
Hudbay Minerals, Inc. Hudbay Minerals, Inc. Other Metals/MineralsNon-Energy Minerals Mines and explores copper, gold, zinc & silver	Non-Energy Minerals
Marquette University Marquette University Other Consumer ServicesConsumer Services Functions as a College/University	Consumer Services
Ducks Unlimited Canada Ducks Unlimited Canada Miscellaneous Commercial ServicesCommercial Services Secures and enhances waterfowl breeding habitats	Commercial Services
Locke Lord LLP (Old) Locke Lord LLP (Old) Miscellaneous Commercial ServicesCommercial Services Provides legal services	Commercial Services
Eros Resources Corp. Eros Resources Corp. Integrated OilEnergy Minerals Engages in acquisition, exploration and development of minerals and oil & gas properties	Energy Minerals
K&L Gates LLP K&L Gates LLP Miscellaneous Commercial ServicesCommercial Services Provides legal services	Commercial Services
Mining Suppliers Association of British Columbia