Jaguar Mining Reports Consistent Drilling Results at the BA Zone of the Pilar Gold Mine, Brazil, Demonstrating Down-plunge Continuity

- Technical update on exploration drilling & resource expansion strategy

TORONTO, ON / ACCESS Newswire / June 15, 2026 / Jaguar Mining Inc. ("Jaguar" or the "Company") is pleased to report the latest results from its ongoing diamond drilling program at the Pilar Gold Mine ("Pilar"), located within the Iron Quadrangle in Minas Gerais, Brazil. The current campaign successfully targeted the down-plunge extensions of the BA Zone within the Pilar Mine, demonstrating that high-grade mineralization remains robust and predictably continuous at depth. These results support a key component of the Company's strategy to de-risk and convert its current exploration targets into formal Mineral Resources.

Highlights

• Proven Continuity: Drilling confirms that the BA Zone mineralization extends over 1.5 km down-plunge and remains open at depth, indicating significant untapped potential (see Figure 1).

• High Geological Confidence: Consistent gold grades and structural thickness support high-certainty modeling for an additional 300 vertical meters beyond current mining levels.

• Resource Growth Potential: These results validate the strategy to convert the gold mineralization in this highly prospective exploration target into formal Mineral Resources, supporting the potential expansion of the Life of Mine (LOM).

• Superior Grades: Key intercepts significantly exceed the mine's current average reserve grade, including 5.30m @ 8.52 g/t Au and 10.00m @ 5.82 g/t Au (see Table 1).

Assay Highlights (full results in Table 1)

"The consistency of the BA Zone at depth is a testament to the quality of the Pilar orebody," stated Armando Massucatto, General Manager of Exploration of Jaguar. "By balancing technical precision with our operational goals, we are demonstrating that the potential of this exploration target is not just theoretical, but a tangible pathway to growth. The structural predictability we are seeing allows us to plan our underground development with increased confidence, effectively de-risking the next phase of the mine's evolution."

Geological Overview and Technical Analysis

The mineralized zones at the Pilar Mine are primarily hosted within a robust Banded Iron Formation (BIF) sequence. The gold mineralization is structurally controlled by the intersection of regional fold axes with the BIF layer, which creates concentrated "mineralized shoots" of higher-grade material (see Figure 2).

Technically, the "open" nature of these folds at depth is a critical factor for the deposit's scale. These structural elements provided the necessary accommodation space for the circulation of gold-bearing hydrothermal fluids during the mineralizing event. Because these folds are continuous and well-defined, the resulting mineralization follows a predictable geometry (see Figure 3). This means that the risk of "losing" the mineralized zone at depth is significantly reduced, as the geological model continues to be validated by every new drill hole (see Figure 4).

Table 1 - Drilling Assay Results
The following table summarizes the most significant intercepts from the recent drilling campaign at the BA Zone. All grades are reported as uncut, and widths represent the Estimated True Width (ETW).