IsoEnergy

June 30, 2026 December 31, 2025 December 31, 2024 Exploration and evaluation assets $ 373,825,242 $ 279,091,819 $ 262,291,098 Total assets 562,531,223 416,958,281 340,835,023 Total current liabilities 16,590,551 12,399,489 35,103,977 Total non-current liabilities 3,695,395 3,132,706 2,567,887 Adjusted working capital (1) 160,889,782 116,743,618 56,116,942 Cash dividends declared per share Nil Nil Nil (1) Adjusted working capital is a non-IFRS financial measure, as discussed below, and is defined as current assets less current liabilities, excluding flow-through share premium liabilities and convertible debenture liabilities.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

Accordingly, the Company’s future performance will be most affected by its access to financing, whether debt, equity or other means.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

The Prospectus provides for the offering up to $250 million in aggregate of common shares, warrants, units, debt securities, and subscription receipts of the Company in Canada and the United States for a period of 25 months following the filing of the Prospectus.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

Jaguar Uranium retains a buy-back option for 1% of the Laguna Salada NSR, exercisable for 7 years at a price of US$2.5 million.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

The Company retained a buy-back option on an existing royalty agreement on the Huemul project (“ Huemul Buy-back Option ”).

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

2% NSR royalty payable on all production from Mountain Lake, of which 1% can be repurchased by Future Fuels for $1,000,000 (the “ Mountain Lake NSR ”).

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

The program focused on drilling at the Hurricane Deposit and testing greenfield targets up to three kilometres along the Larocque regional geological-geophysical corridor (the “ Larocque Trend ”) (Figure 2).

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

Mineralization was intersected in multiple holes along the South Trend of the Larocque East Project in the 2026 winter exploration program and the 2026 summer exploration program is focused on continued testing of this area.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

The drilling program is focused on expanding the Nova Discovery while also evaluating high-priority regional targets across the broader Dorado Project.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

The Sustainability Report highlights the Company’s continued progress in advancing its global uranium portfolio with a focus on environmental stewardship, Indigenous partnerships, empowering local talent, and responsible corporate governance.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

For the three and six months ended June 30, 2026 and 2025 Larocque East Project Winter 2026 – Diamond Drilling The winter 2026 drilling program focused on testing resource expansion targets at the Hurricane Deposit and testing greenfield targets up to three kilometres east along the Larocque Trend.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

Please see “ Note Regarding Forward-Looking Information ” for a discussion of certain of the risks, uncertainties and assumptions used to develop the Company’s forward-looking information.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

IsoEnergy is an exploration and development company and is subject to risks and challenges similar to companies in a comparable stage and industry.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

These risks include, but are not limited to, the challenges of securing adequate capital; exploration, development and operational risks inherent in the mining industry; changes in government policies and regulations; the ability to obtain the necessary permitting; as well as global economic and uranium price volatility; all of which are uncertain.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

The underlying value of the Company’s exploration and development assets is dependent upon the existence and economic recovery of Mineral Reserves and is subject to, among others, the risks and challenges identified above.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

As an exploration company, IsoEnergy is subject to risks and challenges similar to companies at a comparable stage.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026

These risks include, but are not limited to, negative operating cash flow and dependence on third party financing; the uncertainty of additional financing; the Company’s limited operating history; the lack of known mineral reserves; the influence of a large shareholder; alternate sources of energy and uranium prices; aboriginal title and consultation issues; risks related to exploration activities generally; reliance upon key management and other personnel; title to properties; uninsurable risks; conflicts of interest; permits and licenses; environmental and other regulatory requirements; political regulatory risks; competition; and the volatility of share prices.

SEC original ↗IsoEnergy — Earnings release (6-K exhibit)EX-99Jul 30, 2026