Vancouver, British Columbia — February 27, 2026 — Leads & Copy — BP Silver Corp. (TSXV: BPAG) has announced final assay results from the remaining eight drill holes of its eleven-hole Phase I drill program at the Cosuño Silver Project in Bolivia.
The drill program successfully tested key zones along a 2.7 km structural trend, returning significant silver intercepts at the four targets tested to date.
Drilling intersected multiple zones of high-grade silver mineralization at the Pocañita Chica target. Diamond Drill Hole CO-0008 returned 5 meters at 600.4 g/t silver, including 1 meter at 1655 g/t silver. CO-0009 returned 1 meter at 526 g/t silver and 6 meters at 147 g/t silver.
The program achieved its primary objective of confirming silver mineralization within the lithocap beneath surface geochemical anomalies, materially de-risking Cosuño. Silver mineralization was intersected in all four targets tested across an approximately 2.7 km NE-SW corridor, confirming the presence of a robust silver and polymetallic system which remains open for expansion along strike and at depth.
According to Dr. Stewart D. Redwood, Director and Qualifying Person, the recent drill program delivered compelling high-grade silver results, highlighted by an intersection of 5 meters at 600.40 g/t silver and 1 meter grading 1,655.00 g/t silver which equates to 1.65 kilograms of silver per tonne over that interval. Dr. Redwood stated that these results validate the potential discovery of a deposit within the large 10.5 km² alteration zone that remains largely covered and only minimally tested, underscoring the significant exploration upside.
The next phase of exploration will advance the project through extensive geophysical surveys to better define the size and continuity of the four drilled targets, refine Phase II drill planning, and identify additional targets concealed beneath thin surface cover, positioning the project for continued growth.
Dr. Redwood also stated that the company expects Cosuño’s grades to increase when they drill deeper into and below the lithocap. Lithocaps are extensive zones of clay and silica alteration that form in the top part of Bolivian polymetallic vein systems and tin porphyries, similar to those which overlie porphyry copper deposits.
The nearest neighbour to Cosuño, in a similar geological setting, the Pulacayo deposit, has a large lithocap that is barren and conceals a major vein that produced 640 million ounces of silver and 200,000 tons each of lead and zinc.
Assays released are from the remaining 8 drill holes which tested four initial surface targets identified within the large ~10.5km2 Cosuño hydrothermal system.
The assays demonstrate that silver and gold mineralization identified at surface continues at depth within the lithocap. The results are significant because lithocaps are usually barren in similar Bolivian systems, indicating Cosuño’s potential for further discoveries at depth and in covered areas.
The Program successfully tested key zones along a 2.7 km structural trend, returning significant silver intercepts at the 4 targets tested to date:
Pocañita Chica – Broad mineralized envelopes with high-grade silver intervals hosted in hydrothermal breccias.
Pocalleta – Structurally controlled vein mineralization confirming depth potential.
Jalsuri – High-grade silver intercepts with gold 2.7 km northeast of Pocañita Chica, indicating district-scale continuity.
Benhur – Additional silver mineralization along the same structural corridor.
The Program tested four priority targets defined by structurally controlled, outcropping geochemically anomalous to highly anomalous silver-rich polymetallic zones characterized by silicification, intermediate to advanced argillic alteration, sulfides and brecciation. The targets occur within a large ~10.5 km² hydrothermal alteration system as defined by detailed mapping, geochemical sampling and remote sensing alteration studies.
This marks the first drill program completed within the Cosuño project. Holes CO-0001 and CO-0002 were previously reported in a news release dated February 2, 2026.
Interpretation of the results from the Pocañita Chica and Pocalleta targets highlight approximately 300 meters of vertical difference and a lateral separation of about 0.8 km between the two targets. Geochemical results indicate elevated copper, tin and indium values at lower elevations within the system. This vertical metal zonation suggests strengthening base and critical-metal enrichment at depth, consistent with a vertically developed polymetallic system.
Both targets are interpreted as parts of a single, large, vertically zoned magmatic-hydrothermal system. Pocañita represents a shallow resurgent dome affected by intense hydrothermal brecciation and strong silver mineralization. Approximately 0.8 km away and structurally deeper, the Pocalleta vein system is hosted in competent volcanic rocks.
Silver is hosted within a polymetallic mineral system and is associated with antimony, bismuth, copper, indium, lead, tin, and zinc. These metals occur both within the main mineralized zones and along their margins, forming a complex zonation pattern. While currently present at generally low grades, some, subject to ongoing positive exploration and associated metallurgical studies, may be recoverable as by-products. Metal concentrations may also increase with depth.
BP Silver Corp. also confirms that it has engaged Adelaide Capital to provide investor relations and consulting services to the Company. The term of the agreement is from February 1, 2026 to April 1, 2026 and will automatically renew on a month-to-month basis for the same monthly fee. Either party may terminate the agreement by providing 30 days’ written notice to the other party.
The technical information contained in this news release has been reviewed and approved by Dr. Stewart D. Redwood, a Director of the Company and a Qualified Person.
BP Silver Corp. is a Canadian exploration company focused on advancing high-grade silver projects in Bolivia. The Company’s flagship asset, the Cosuño Project, is strategically located in the prolific Bolivian silver belt.
Source: BP Silver Corp.
