Rio Tinto Acquires Remaining Stake in Turquoise Hill Resources for C$43.00 per Share

Tourmaline Sells a Portion of Its Topaz Energy Stake

September 22, 2026

Energy

Tourmaline Oil Corp. agreed to sell 10 million Topaz Energy Corp. common shares to a syndicate of underwriters led by Peters & Co. Limited and Scotiabank in a C$287.5 million bought deal secondary offering. Topaz will receive no proceeds; Tourmaline intends to use the net proceeds to repurchase its own shares under its normal course issuer bid.

Canadian Natural Resources Acquires Tourmaline Oil Corp

January 14, 2026

Oil & Gas

Canadian Natural Resources Ltd. has acquired Tourmaline Oil Corp for approximately $800 million, consolidating a major natural gas producer into its portfolio. The deal brings Tourmaline’s Calgary-headquartered natural gas assets and production into Canadian Natural’s operations to expand scale, capabilities and market access across North America and international markets.

Rio Tinto Acquires Arcadium Lithium

March 6, 2025

Energy

Rio Tinto will acquire Arcadium Lithium in an all-cash transaction valued at US$5.85 per share. The deal was completed on March 6, 2025, triggering a make-whole fundamental change for certain Arcadium-issued convertible senior notes due 2025.

Gold Fields Acquires Osisko Mining for C$2.16 Billion

August 12, 2024

Energy

Gold Fields Limited, through a wholly owned Canadian subsidiary, has entered into a definitive arrangement agreement to acquire all outstanding shares of Osisko Mining Inc. in an all-cash transaction valued at approximately C$2.16 billion. The deal is expected to close in Q4 2024 and will be completed via a statutory plan of arrangement under Ontario law.

McEwen Mining Acquires Timberline Resources

April 16, 2024

Energy

McEwen Mining Inc. has entered into a definitive agreement to acquire all outstanding shares of Timberline Resources Corporation in an all-share merger. The deal will expand McEwen's portfolio of development and exploration projects in Nevada; Timberline shareholders will receive 0.01 of a McEwen share per Timberline share, implying a transaction value of roughly US$18.8 million (excluding McEwen’s existing ownership).

Yintai Gold Co., Ltd Acquires Osino Resources Corp. for C$368 Million

February 25, 2024

Energy

Yintai Gold Co., Ltd will acquire all outstanding common shares of Osino Resources Corp. for C$1.90 per share, valuing Osino at approximately C$368 million in an all-cash plan of arrangement. The transaction, which includes a concurrent US$10 million loan to Osino and reimbursement of a termination fee, is subject to shareholder, court and regulatory approvals and is expected to close in H1 2024.