Dominion Diamond Corporation

Lenders and underwriters in the acquisition of Dominion Diamond Corporation by Washington Companies Corp.


Lenders and Underwriters


US$1.2 billion


Mergers and Acquisitions

Date Closed

November 2017



Lead Office



On November 1, 2017, Washington Companies (“Washington”) announced it completed its acquisition of Dominion Diamond. Washington acquired all of Dominion’s outstanding common shares for US$14.25 per share in cash - a total equity value of approximately US$1.2 billion. Washington financed the acquisition in part with the proceeds of a US$550 million senior note offering and partly with the proceeds of a US$200 million senior secured credit facility. 

Dominion Diamond is a Canadian diamond mining company, and is Canada’s largest independent diamond producer. It supplies rough diamonds to the global market through its sorting and selling operations in Canada, Belgium, and India.

The Washington Companies are a group of privately held companies headquartered throughout the United States and Canada. They are active in the mining, rail and marine transportation, aviation, environmental remediation and restoration services, and heavy equipment sales and service industries. Washington is headquartered throughout Montana, the Pacific Northwest and western Canada and conducts business internationally.

Osler, Hoskin & Harcourt LLP represented the Lenders under the credit facility and the initial purchasers of the notes in the acquisition of Dominion Diamond by Washington Corp with a team composed of Joyce Bernasek and Jeremy Burgess (Banking and Financial Services), Alan Hutchison  and Patrick Sullivan (Corporate), Michelle Lally (Competition), Jennifer Fairfax and Patrick Welsh (Environmental) and Greg Wylie (Tax).

Joyce M. Bernasek
Key Contact

Joyce M. Bernasek

Partner, Financial Services

Alan Hutchison - Mining lawyer

Alan Hutchison

Partner, Corporate

Michelle Lally - Competition/Antitrust Lawyer

Michelle Lally

Partner, Competition/Antitrust & Foreign Investment

Jennifer  Fairfax

Jennifer Fairfax

Partner, Litigation; Regulatory, Environmental, Aboriginal and Land

Gregory  Wylie

Gregory Wylie

Partner, Taxation

Patrick G. Welsh

Patrick G. Welsh

Partner, Regulatory, Environmental, Aboriginal and Land; Litigation

Patrick has a broad corporate practice with an emphasis in securities, mining and corporate gover..

Patrick Sullivan

Associate, Corporate