Osisko Mining Inc. Files Early Warning Report in Respect of Kilo Goldmines Inc.

TORONTO, Aug. 27, 2018 - Osisko Mining Inc. (TSX:OSK) (the "Corporation" or "Osisko") today announces that it has filed an early earning report in respect of its holdings in Kilo Goldmines Inc. ("Kilo") as a result of the expiry, on August 25, 2018, of 5,000,000 common shares purchase warrants of Kilo ("Warrants") held by the Corporation (the "Warrant Expiration").

Prior to giving effect to the Warrant Expiration, the Corporation owned or controlled 19,100,000 Warrants, representing approximately 10.1% of the issued and outstanding common shares of Kilo ("Common Shares") on a partially-diluted basis, after giving effect only to the exercise of the 19,100,000 Warrants held by the Corporation.

After giving effect to the Warrant Expiration, the Corporation owns or controls 14,100,000 Warrants, representing approximately 7.7% of the issued and outstanding Common Shares on a partially-diluted basis, after giving effect only to the exercise of the 14,100,000 Warrants held by the Corporation.

Osisko reviews its holdings from time to time and may increase or decrease its position as future circumstances may dictate. Osisko, after reviewing market and other conditions, permitted the 5,000,000 Warrants to expire, unexercised. The 5,000,000 Warrants were "out-of-the money".

This news release is being issued in accordance with National Instrument 62-103 – The Early Warning System and Related Take-Over Bid and Insider Reporting Issues in connection with the filing of an early warning report dated August 27, 2018. The early warning report has been filed on the System for Electronic Document Analysis and Review ("SEDAR") under Kilo's issuer profile at www.sedar.com. To obtain a copy of the early warning report filed by Osisko, please contact John Burzynski at (416) 363-8653 or refer to SEDAR under Kilo's issuer profile at www.sedar.com.

For further information, please contact Osisko Mining Inc.: