|
Westernzagros Resources Ltd.
|
John Frangos, Randall Oliphant, Frederick Dyment
|
|
United States Steel Corporation
|
Thomas J Usher
|
|
PPG Industries
|
Thomas J Usher
|
|
PNC Financial Services Group Inc.
|
Thomas J Usher
|
|
H. J. Heinz Company
|
Thomas J Usher
|
|
University of Pittsburgh
|
Thomas J Usher
|
|
Marathon Petroleum Corporation
|
Thomas J Usher
|
|
Obsidian Energy
|
David Dyck
|
|
Franco-Nevada Corporation
|
Randall Oliphant
|
|
Ivanhoe Energy Inc.
|
David Dyck
|
|
Arc Resources Ltd.
|
Frederick Dyment
|
|
Frontera Energy
|
David Dyck
|
|
Transglobe Energy Corporation
|
Frederick Dyment
|
|
Ppg Industries Inc
|
Thomas J Usher
|
|
Penn West Energy Trust
|
David Dyck
|
|
New Gold Inc.
|
Randall Oliphant
|
|
Marathon Oil Corporation
|
Thomas J Usher
|
|
Tesco Corporation
|
Frederick Dyment
|
