ALTA CV

ALTAMIRA GOLD CORP

Brazil

NEWS RELEASE Nov 4, 2026

Altamira Gold Corp. (TSXV: ALTA) (FSE: T6UP) (OTCQB: EQTRF) (“Altamira” or the “Company”) is pleased to announce that it has filed a National Instrument 43-101 technical report with an effective date of September 16, 2026 (the “Report“) on the updated resource estimate for the Maria Bonita porphyry gold deposit within the Company’s Cajueiro Project in Brazil.

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Beyond the Headline

Written by Bill Pearson, PHD, P. GEO

Altamira has filed the NI 43-101 technical report supporting its substantially expanded Maria Bonita gold resource at the Cajueiro Project in Mato Grosso, Brazil (Figure 2-1). The updated mineral resources as first reported September 21, 2026 is given in Table 2-1:

Table 2-1: Maria Bonita Mineral Resource estimate at a 0.24g/t gold cut-off grade (Altamira press released September 21, 2026):

Notes

  1. The effective date of the Maria Bonita Mineral Resource Estimate is September 16, 2026.
  2. CIM Standards were followed for the estimation of Mineral Resources.
  3. Mineral Resources are estimated at a cut-off grade of 0.24 g/t Au for open-pit fresh-rock mineralization, 0.24 g/t Au for saprolite.
  4. Mineral Resources are estimated using a long-term gold price of US$3,300 per ounce.
  5. Open pit Mineral Resources are reported within a conceptual open pit
  6. Bulk density is 1.68t/m3 for saprolite and 2.63 t/m3 for fresh material based on site measurements on drill core
  7. Metallurgical recovery used is 90% for saprolite, and 90% for fresh rock.
  8. Numbers may not add due to rounding.
  9. Mineral Resources that are not Mineral Reserves do not have demonstrated economic viability.

A significant higher grade near-surface resource has also been identified, and at a 0.5 g/t gold cut-off comprises total Indicated Resources of 9Mt @ 0.75g/t containing 225,630oz and total Inferred Resources are 11Mt @ 0.80g/t containing 286,859oz Au.

The Cajueiro district also contains independently estimated mineral resources at Cajueiro Central approximately 7km east of Santa Maria and linked by unsurfaced road.

The Cajueiro Central project (Figure 2-2) has current NI 43-101 resources2 of 5.66Mt @ 1.02 g/t gold for a total of 185,000 oz in the Indicated Resource category and 12.66Mt @ 1.26 g/t gold for a total of 515,000 oz in the Inferred Resource category estimated using a gold price of US$1,500/oz (Altamira September 21, 2026 press release).

Comments

This mineral resource estimate for Maria Bonita is a good start showing the scale of the mineralized system.  Recent trenching and drilling on the western extension of the Maria Bonita have returned encouraging higher grade results including Trench TCMBA05 which returned: 114m @ 0.7g/t Au including 36m @ 1.3g/t Au, highlighting the potential to expand near-surface mineralization of higher grade. Drilling is continuing on the western extension area.  It will be important to target potentially higher grade areas.

Figure 2-1 Source Altamira Gold

Figure 2-2 Source Altamira Gold