Dr. Ewan Webster reports

THESIS GOLD & SILVER STRENGTHENS TEAM WITH APPOINTMENT OF DIMITRY DEMIANYUK AS EVP PROJECT DEVELOPMENT

Thesis Gold & Silver Inc. has appointed Dimitry Demianyuk as executive vice-president, project development, effective June 21, 2026.

Mr. Demianyuk brings more than two decades of mining and metals project development experience, with a strong record in advanced project planning, technical studies, execution readiness, risk management, construction delivery, commissioning and start-up. He most recently served as vice-president, project development, at Discovery Silver, where he led the delivery of the Cordero project's PEA (preliminary economic assessment), PFS (prefeasibility study) and feasibility study, helping advance one of Mexico's largest next-generation greenfield silver development projects.

Mr. Demianyuk was also a key member of Discovery Silver's due diligence team for the acquisition of the Porcupine gold mining complex from Newmont and the Kidd operation from Glencore -- the transactions that transformed Discovery into a mid-tier producer and supported significant corporate growth.

Earlier in his career, he held senior project and engineering management roles with Pure Gold Mining, Nevsun Resources, Frontera Mining, Rio Tinto, Newcrest, and engineering firms Hatch, Ausenco and JDS. His experience includes owner team leadership, EPCM (engineering, procurement and construction management), project derisking, execution planning, capital control, permitting support and execution.

Dr. Ewan Webster, president and chief executive officer, commented: "We are very pleased to welcome Dimitry to Thesis at a key inflection point for the company. His deep experience in advancing large-scale projects through study, derisking and into execution aligns directly with our objectives at Lawyers-Ranch. Dimitry strengthens our ability to deliver on our development strategy and unlock the full value of the project."

Thesis granted: (i) 250,000 stock options; (ii) 53,500 restricted share units; and (iii) 53,500 performance share units to an officer, with all awards governed by the company's omnibus long-term incentive plan and each applicable award agreement.

Each vested option entitles the holder to purchase one common share of the company at an exercise price of $3.53 per common share for five years from May 31, 2026. The options vest one-third on the first, second and third anniversaries of the grant date.

Each vested RSU entitles the holder to receive one common share upon settlement. The RSUs vest one-third on the first, second and third anniversaries of the grant date.

Each vested PSU entitles the holder to receive one common share upon settlement. The PSUs vest upon satisfaction of certain corporate objectives established by the company over a three-year period.

About Thesis Gold & Silver Inc.

Thesis Gold & Silver is a Canadian precious metals development company focused on advancing its 100-per-cent-owned Lawyers-Ranch gold-silver project in British Columbia's prolific Toodoggone mining district, one of North America's most prospective emerging precious metals districts. Lawyers-Ranch hosts a large, high-quality gold-equivalent mineral resource with meaningful exposure to silver, which represents a significant component of the project and long-term value proposition.

Thesis Gold & Silver is advancing Lawyers-Ranch through feasibility, permitting and continued exploration, with the objective of unlocking long-term value for shareholders and stakeholders.

We seek Safe Harbor.