Mr. Enrico Gay reports

ALGO GRANDE PROVIDES PHASE II DRILL UPDATE; HOLE 2 COPPER ZONE DOUBLES AS HOLE 3 DELIVERS EXTENSIVE NEW INTERVAL, REMAINS MINERALIZED AT DEPTH

Algo Grande Copper Corp. has provided an update on its continuing phase 2 drill program at the 100-per-cent-owned Adelita project, Sonora, Mexico. Hole AG-CG-PH2-002 has intersected an expanded zone of copper mineralization that has more than doubled in extent since the company's last update, with a first section of core samples submitted to the laboratory for assay. Hole AG-CG-PH2-003, drilled by the second, track-mounted rig operating across the Cerro Grande skarn target, has intersected an extensive interval of copper sulphide mineralization hosted in garnet skarn and retrograde exoskarn.

Enrico Gay, chief executive officer of Algo Grande, commented: "Hole 2's expanding copper zone and Hole 3's extensive new interval are building a compelling case for scale at Cerro Grande though we are still early in testing this system. We expect assays from this drill program to start coming out in the next few weeks, kicking off a steady flow of results from ALS as we move forward."

Hole AG-CG-PH2-002 progress

Hole AG-CG-PH2-002 was planned on top of the Cerro Grande mountain, drilling steeply into the system. The hole has reached a depth of 424.22 metres to date, proceeding to a planned total depth of 700 metres. As previously reported, the hole was expected to intersect known mineralization at 250 metres, but copper mineralization was first encountered over 100 metres above the expected mineralized zone, within a 30.23-metre interval from 146.70 to 176.93 metres comprising two discrete intervals: 19.80 metres from 146.70 to 166.50 metres and a second interval of 8.57 metres from 168.36 to 176.93 metres (28.37 metres in aggregate), hosted in massive brown garnet-dominant skarn and, for the first time in the program, in an andesitic porphyry intrusion (see news release dated July 28, 2026).

Since the previous update, the company has logged a second, more extensive zone of copper mineralization within a 108.20-metre interval from 192.90 to 301.10 metres. This zone comprises six discrete copper-bearing intervals that together total 40.40 metres of visually observed copper-bearing core, hosted in retrograde exoskarn, and includes chalcocite, chalcopyrite, bornite, covellite and chrysocolla, with the most substantial single interval logged from 260.25 to 279.47 metres (19.22 metres). Molybdenite occurs intermittently through this interval, including a 3.06-metre interval from 248.24 to 251.30 metres. Combining both zones, hole AG-CG-PH2-002 has intersected copper mineralization across a combined 154.40-metre interval from 146.70 to 301.10 metres, with a total of 68.77 metres of visually observed copper-bearing core.

Core samples from initial part of hole AG-CG-PH2-002 down to 179 metres were delivered to the ALS laboratory in Hermosillo, Sonora, on Friday, Aug. 7, 2026, for assay. Results are pending and will be reported as they are received.

Hole AG-CG-PH2-003 progress

Hole AG-CG-PH2-003 has been drilled.

The hole has intersected copper mineralization within a combined 73.91-metre interval from 165.74 to 239.65 metres, comprising a total 37.42 metres of visually observed copper-bearing core.

Management interprets this copper-bearing intersect in hole 3 as a 105-metre vertical stepout above the AG-GC-002 intercept. AG-GC-002 was drilled during the company's inaugural phase 1 drill campaign at Adelita between Nov. 23, 2025, and Jan. 20, 2026. Management views this as an early indication of vertical continuity within the Cerro Grande mineralizing system.

The upper zone, within a 42.03-metre interval from 165.74 to 207.77 metres, comprises six discrete copper-bearing intervals totalling 14.86 metres of visually observed copper-bearing core, hosted in garnet-dominant skarn with strong pro-grade alteration. Copper sulphides in this zone (bornite, chalcocite and covellite, with trace chalcopyrite) occur as patches and veinlets.

The lower zone, a second and more extensively copper-mineralized interval, spans 31.88 metres from 207.77 to 239.65 metres. This zone comprises a total of 22.56 metres of visually observed copper-bearing core, hosted predominantly in retrograde exoskarn (yellow to green garnet dominant), and includes chalcocite, covellite, chalcopyrite, bornite, chrysocolla and minor native copper. Copper oxide (chrysocolla) is also locally associated with calcite veinlets within this interval.

As with holes 1 and 2, these observations are based on visual core logging only. No assay results have been received for hole AG-CG-PH2-003, and true widths have not yet been determined. Hole AG-CG-PH2-003 remains in copper mineralization at its current depth of 239.65 metres and continues to advance, indicating the mineralized zone remains open to depth.

Qualified person

The scientific and technical information disclosed in this news release has been reviewed and approved by Joao Rocha, EurGeol, vice-president of exploration of Algo Grande, a qualified person as defined by National Instrument 43-101.

About Algo Grande Copper Corp.

Algo Grande is a growth-focused mineral exploration company advancing the Adelita project, a district-scale, multisystem copper-silver-gold opportunity positioned in the prolific Arizona-Sonora copper belt. The 5,895-hectare Adelita project is anchored by the high-grade Cerro Grande copper-silver-gold skarn discovery, which exhibits strong continuity along a defined corridor extending over six kilometres. Reprocessing of legacy geophysical data and field mapping indicate the presence of a potential porphyry system at depth, suggesting a classic skarn-porphyry mineralization model similar to major deposits found throughout northwestern Mexico.

We seek Safe Harbor.