Initial laboratory-scale bottle-roll tests returned calculated-head gold recoveries of 82.3% to 94.8% and copper extraction of 71% to 80%, supporting further evaluation of a feed-specific copper pretreatment and RZOLV gold-leach pathway.

Vancouver, British Columbia - Newsfile Corp. - June 29, 2026 - RZOLV Technologies Inc. (TSXV: RZL) (OTCQB: RZOLF) (FSE: S711) ("RZOLV" or the "Company") is pleased to announce positive preliminary laboratory results from initial scoping tests on selected low-grade copper-gold composite samples using its proprietary RZOLV™ platform. Despite being conducted under unoptimized conditions, the initial tests returned calculated-head sequential recoveries ranging from 82.3% to 94.8% for gold and from 71% to 80% for copper. The program was designed as an early-stage laboratory evaluation and did not include systematic optimization of pre-treatment conditions, leach parameters, reagent regime, residence time, grind size, or other process variables. The Company cautions that these results are preliminary in nature and may not be representative of recoveries achievable under optimized, continuous, or commercial operating conditions. The laboratory program evaluated two selected composite samples representing different copper-gold relationships: one higher-gold, lower-copper composite and one lower-gold, higher-copper composite. The testwork compared direct RZOLV leaching against a sequential configuration of the proprietary RZOLV platform in which copper was first extracted in a pre-treatment step, followed by RZOLV gold leaching of the pre-treated residue. The Company considers the results encouraging because they demonstrate effective gold recovery from copper-bearing material under the specific laboratory conditions tested, while also identifying a potential pathway to manage copper through a separate pre-treatment step and feed-specific flowsheet design. Copper is a relevant factor in many gold systems because it can affect reagent demand and leach conditions and complicate downstream recovery. Key Preliminary Laboratory Results The testwork demonstrated the following results under the conditions tested:

• The higher-gold, lower-copper composite achieved 94.8% calculated-head gold recovery by direct RZOLV leaching, and 89% after copper pre-treatment followed by RZOLV leaching. The direct route therefore produced the stronger result for this selected sample, and pre-treatment may not be necessary for similar lower-copper material where direct recovery is already strong.
• The lower-gold, higher-copper composite achieved 82.3% calculated-head gold recovery by direct RZOLV leaching, increasing to 84.1% after copper pre-treatment followed by RZOLV leaching. The pre-treatment step extracted a substantial portion of copper into a separate process stream before gold leaching, supporting further evaluation of sequential copper and gold extraction for similar higher-copper material.
• The copper pre-treatment resulted in calculated copper extraction of approximately 71% to 80% into the pre-treatment liquors under the conditions tested.
• No gold was detected in the pre-treatment liquors under the analytical method used.
• Reported RZOLV additions were approximately 27% to 64% lower in the pre-treated tests than in the corresponding direct-leach tests. Additional testing is required to confirm the mechanisms affecting reagent demand and optimize the integrated process.
• The results support further testing to determine whether selected lower-copper material may be suitable for direct RZOLV leaching, while selected higher-copper material may benefit from sequential copper pre-treatment followed by RZOLV gold leaching. This is presented as a concept for further evaluation, not an established project flowsheet.
• Because both copper and gold represent potential value streams, further work will evaluate recovery of each metal into a saleable product or intermediate and assess the technical and economic performance of the integrated process.

"These positive preliminary results are encouraging because they were achieved during the first laboratory evaluation of the selected samples and before systematic process optimization," said Duane Nelson, President and Chief Executive Officer of RZOLV Technologies. "The tests demonstrated strong gold recovery and sequential extraction of copper and gold into separate process streams. The results support further evaluation of a feed-specific processing approach, including direct RZOLV leaching for selected lower-copper material and copper pre-treatment followed by RZOLV gold leaching for selected higher-copper material." Mr. Nelson continued: "Further work will focus on repeatability, process optimization, scale-up evaluation, and recovery of both metals into saleable products or intermediates to assess the technical and economic potential of the integrated process." Test Program Overview The...