NOTICE OF EARNINGS CALL to the Holders of Northwest Acquisitions ULC Dominion Finco, Inc. 7.125% Senior Secured Second Lien Notes due 2022

The Dominion Diamond Mines ULC Investor Portal has been updated with information regarding a recent change to the time of the Q1 earnings call. The earnings call will now be held at 11AM EST on Friday May 24, 2019.

Notification regarding details of this earnings call have been provided through Dominion Diamond’s automated email alert system. If you are not currently subscribed to the Investor Portal, please subscribe to receive automated email alerts regarding information posted to the Investor Portal. If you are currently subscribed to the Dominion Diamond Investor Portal and have not received these automated email notifications, please review any email filters with your corporate IT department.

Regards,

Dominion Diamond Mines ULC

View source version on businesswire.com: https://www.businesswire.com/news/home/20190510005530/en/

Huili Li
investor@ddcorp.ca