Bonterra Intersects High-Grade, Visible Gold at O'Brien East Deep Target at its 100% Owned Desmaraisville South Project

Bonterra Resources Inc. (BTR) has released preliminary 2026 drill results from its 100%-owned Desmaraisville South Project in Quebec. The exploration program included 23 holes totaling 10,136 meters, five of which were abandoned. Assays have been received for 14 of the 23 holes, while five remain in core cutting and nine are partial or pending.

Reported highlights include:

• O’Brien East Deep: BRDS-26-114 returned 4.75 g/t Au over 1.4 m from 261.3 m, including 16.03 g/t Au over 0.4 m with visible gold.
• O’Brien East Deep: BRDS-26-124A returned 0.71 g/t Au over 2.2 m from 1,088.8 m.
• Céré-Murgor: BRDS-26-128A returned 0.79 g/t Au over 8.2 m from 528.3 m, including 1.33 g/t Au over 2.7 m and 4.05 g/t Au over 0.6 m with visible gold; also 1.99 g/t Au over 0.7 m from 466.0 m.
• Mistik 13: BRDS-26-116A returned 1.03 g/t Au over 1.5 m from 96.7 m.

The company is also relogging and sampling 70 historic holes, having received 1,308 assay results, and has completed structural, geophysical, and hyperspectral studies. True widths are not stated; intervals are downhole core lengths. The cutoff is 0.5 g/t Au with a metal factor above 1.

Bonterra Resources Inc. (BTR) reported drill results that do not alter its resource base, mine plan, or development thesis. The company currently holds a gross resource base of approximately 1.63 moz Measured and Indicated and 2.17 moz Inferred across its assets. The new intercepts are described as narrow reconnaissance hits that would not meet current underground mining cutoffs or minimum widths.

As an advanced explorer and developer with no revenue and negative equity, Bonterra’s equity value is primarily driven by the Gold Fields Phoenix joint venture earn-in, the Bachelor and Moroy resources, the Bachelor Mill restart concept, financing activities, and the CRA audit. This announcement serves as a minor exploration update.

In October 2025, Bonterra reported Desmaraisville South results that included materially better intervals, such as 2.78 g/t over 4.7 m, 2.54 g/t over 8.0 m, 1.32 g/t over 17.0 m, and Mistik 13 of 3.05 g/t over 4.61 m. The stock has since declined from approximately C$0.23 to C$0.14, indicating that those prior results are not embedded in the current price. The new release is weaker in grade-width substance compared to those older holes.

Bonterra Resources Inc. (BTR) is a Quebec-focused gold exploration and development junior operating in the Abitibi Greenstone Belt. Its portfolio includes the 100%-owned Desmaraisville South property, which encompasses the Bachelor and Moroy deposits and the Bachelor Mill complex. The company also holds a joint venture with Gold Fields on the Phoenix project, covering the Barry and Gladiator deposits. Under the terms of this agreement, Gold Fields can earn a 70% interest by spending C$30 million on work by November 2026. Bonterra also references a Nelligan joint venture in prior investor materials.

The company reports current gross resources of 16.8 Mt at 3.02 g/t for 1.63 moz Measured and Indicated, and 15.6 Mt at 4.32 g/t for 2.17 moz Inferred. Most of these ounces are located in the Phoenix JV, where Bonterra would retain a minority interest if Gold Fields completes its earn-in.

In the second quarter of 2026, Bonterra reported a net loss of C$6.03 million, cash on hand of C$3.28 million, negative equity of C$8.15 million, and a working-capital deficiency of C$17.78 million. The period also included a C$13.64 million indemnification provision related to the Canada Revenue Agency. An August 2026 rights offering closed for C$20.4 million at C$0.12 per share, increasing shares outstanding to 382,847,377.