Osisko Metals Inc. Updates on Gaspé Copper Project and Shareholder Meeting

Osisko Metals Incorporated (TSX: OM) disclosed a series of developments on May 29, 2026 that underscore the company’s progress on its Gaspé Copper Project and the outcomes of its 2026 annual shareholder meeting.

NI 43‑101 Technical Report Filing

On May 28, 2026, Osisko filed an NI 43‑101 Technical Report on the Gaspé Copper Project, titled “NI 43‑101 Technical Report on the Gaspé Copper Project with an Updated Mineral Resource Estimate for the Copper Mountain Deposit, Quebec, Canada.”

  • The report was prepared by PLR Resources Inc., G Mining Services Inc., and Synectiq Inc.
  • It confirms that the technical data published in the April 14, 2026 news release—“Osisko Metals Announces Significant Increase in Mineral Resources at Gaspé Copper”—remains unchanged.
  • The updated Mineral Resource Estimate (MRE) for 2026, based on a base‑case cut‑off grade of 0.16 % CuEq, presents the following key figures:
  • Measured: 136.5 Mt, 0.42 % CuEq (0.37 % Cu), 0.014 g t⁻¹ Ag; 1.98 Mt Cu (1,128 Mt Cu‑equivalent) and 19 Mt Mo.
  • Indicated: 1,697.7 Mt, 0.32 % CuEq (0.26 % Cu), 0.017 g t⁻¹ Ag; 1.54 Mt Cu (9,639 Mt Cu‑equivalent) and 286.4 Mt Mo.
  • Measured + Indicated: 1,834.2 Mt, 0.32 % CuEq (0.27 % Cu), 0.017 g t⁻¹ Ag; 1.57 Mt Cu (10,766 Mt Cu‑equivalent) and 305.4 Mt Mo.
  • Inferred: 238.8 Mt, 0.46 % CuEq (0.41 % Cu), 0.016 g t⁻¹ Ag; 1.88 Mt Cu (2,158 Mt Cu‑equivalent) and 37.6 Mt Mo.

The report confirms no material differences between the technical data and the April news release, meeting NI 43‑101 requirements.

Annual Shareholder Meeting Results

On May 28, 2026, Osisko announced the results of its annual meeting of shareholders.

  • 475,369,374 common shares were represented at the meeting, covering approximately 64.4 % of the company’s total common shares.
  • The company welcomed Keith McKay to its board of directors, expanding governance oversight.

Market Context

  • The company trades on the Toronto Stock Exchange (TSX) and the OTCQX under the symbol OMZNF.
  • As of May 28, 2026, the share price closed at CAD 1.79, with a 52‑week high of CAD 1.91 (May 12, 2026) and a 52‑week low of CAD 0.38 (September 7, 2025).
  • Osisko’s market capitalization stands at CAD 1.37 billion.

These developments highlight Osisko Metals’ ongoing focus on expanding its mineral resource base at the Gaspé Copper Project while maintaining robust shareholder engagement and governance practices.