An explorer defined by one drill programme

Why has Onyx Gold Corp. (TSXV:ONYX) concentrated so much of its effort on the Argus gold system east of Timmins? As of 4 November 2026, the answer in the company's own disclosures is straightforward: drilling at its Munro-Croesus project has repeatedly returned broad zones of gold mineralisation, and Onyx has responded by enlarging its 2026 drill programme to 110,000 metres, adding rigs and consolidating surrounding ground. The company is still at the exploration stage, has no mineral resource estimate disclosed and generates no revenue, so its prospects rest on drilling results, funding and gold market conditions.

Onyx is a Vancouver-based gold explorer led by president and chief executive Brock Colterjohn. Its shares trade on the TSX Venture Exchange under ONYX and on the OTCQX in the United States as ONXGF. In February 2026 it was named to the TSX Venture 50, the exchange's annual ranking of top performers based on share price appreciation, Market Capitalisation growth and trading value. That ranking is a recognition programme rather than a stock market index.

The Munro-Croesus project and wider portfolio

Munro-Croesus is a 100%-owned land package of about 109 square kilometres, roughly 75 kilometres east of Timmins, Ontario, along Highway 101 in the Abitibi greenstone belt. It surrounds the past-producing, high-grade Croesus gold mine and lies in a district that includes Mayfair Gold's Fenn-Gib project and STLLR Gold's Tower Gold project. Onyx controls about eight kilometres of strike along the Pipestone Fault, a regional structure, and its 2026 programme was designed to test about five kilometres of it.

The company also holds the Golden Mile property, about 140 square kilometres located nine kilometres from the Hoyle Pond mine, the Timmins South property of about 187 square kilometres in the Shaw Dome area, and four properties in Yukon's Selwyn Basin, including King Tut, for which it reported 2025 results in January 2026.

Drilling results at Argus

The Argus system comprises several zones, chiefly Argus North, discovered in April 2025, and Argus Main, described by the company as a near-surface, bulk-tonnage style system. In December 2025, Onyx reported 194 metres grading 1.8 grams per tonne (g/t) gold at Argus North. In 2026 it has reported, among other intercepts, 77.2 metres at 1.3 g/t gold at Argus Main, 0.8 g/t over 70.0 metres and 0.7 g/t over 95.0 metres in June, and in July 3.5 g/t over 28.1 metres, including 5.3 g/t over 17.8 metres, in hole MC26-274A at Argus North.

The July release said Argus North had been intersected beyond 700 metres vertical depth and that hole MC26-324 at Argus Main returned 1.0 g/t gold over 93.0 metres. It also reported a new Northeast Target about 250 metres from Argus Main, where MC26-316 cut 2.6 g/t over 7.3 metres. On 19 August, the company reported 1.7 g/t gold over 67.0 metres at Argus Main, including a higher-grade section with visible gold. Onyx says mineralisation at Argus extends over about 1.4 kilometres of strike and remains open. Drill intercepts are not the same as true widths or a resource, and grades of around one gram per tonne would typically need large tonnages to be economic.

Programme expansion and land consolidation

On 23 April 2026, Onyx expanded the Munro-Croesus programme from 75,000 to 110,000 metres and added a fourth rig. By mid-July it had drilled about 75,000 metres in 188 holes, and a 17 September update put the total at about 90,000 metres in 236 holes, with assays released for 140 holes and roughly 20,000 metres remaining. The company intends to complete the programme by the end of 2026.

The September release also described land and surface work. Onyx paid the remaining C$1.35 million and issued 2,475,000 shares to accelerate its Argus North claim option, completed four other all-cash acquisitions whose prices were not disclosed, and said it now controls all key surface and mineral rights within three kilometres of Argus. It completed a drone magnetic survey of about 1,470 line-kilometres, trenching and channel sampling, and is evaluating a shorter access route from Highway 101. A further update on 26 October reported more broad mineralisation at Argus North.

Cash, funding and dividends

Onyx has funded its work through equity. In autumn 2025, it closed a C$20 million brokered financing on 2 October and a C$6.4 million non-brokered Placement at C$2.43 per share on 15 October. The company reported a treasury of about C$22 million in April 2026 and about C$18 million in cash in July, describing the 110,000-metre programme as fully funded. As an explorer without revenue, it does not pay dividends; none has been announced.

The share price was C$1.65 on 9 September 2026, with around 88.4 million shares outstanding, a Market Value of roughly C$145 million and a 52-week range of C$1.01 to C$2.07. These are dated figures, and further Equity issuance would dilute existing holders.

Sector conditions and principal risks

Gold explorers' access to capital is closely tied to the gold price and investor appetite for early-stage projects, and the Timmins camp benefits from established infrastructure and Mining expertise. Even so, exploration carries significant risks: results may not translate into an economic deposit, metallurgical and permitting work has not been reported, costs can rise and future programmes will probably require new financing. With cash falling as drilling continues, the timing and terms of any next raise are an important consideration. Share prices of junior explorers can also be volatile around drill announcements.

Milestones to monitor

Disclosed near-term items include completion of the 110,000-metre programme by year end, release of outstanding assays, interpretation of the drone magnetic data, advancement of regional targets towards drilling and the access route study. Investors will also watch for any guidance on 2027 plans, an updated cash position and whether the company outlines a timetable for a first mineral resource estimate, which it had not done.