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STLLR Gold Inc. TSX: STLR / OTCQX: STLRF / FSE: O9D
Introduction
STLLR Gold Inc. is a Canadian gold development company focused on building one of the largest undeveloped gold project portfolios in Canada. The company’s key assets are the Tower Gold Project in the Timmins Mining Camp of Ontario, the Colomac Gold Project in the Northwest Territories, and the Hollinger Tailings Project in Timmins.
This is not a small single-asset exploration story. STLLR already controls a very large gold resource base. The company reports a combined mineral resource of approximately 7.8 million ounces of gold indicated and 8.8 million ounces of gold inferred across Tower, Colomac, and Hollinger. Its two cornerstone assets, Tower and Colomac, both have the potential to become large-scale, long-life gold operations.
The main bull case is simple: STLLR is trading like a junior developer, but it controls a gold inventory that is normally seen in much larger companies. Tower alone has a 2025 PEA showing potential average production of 273,000 ounces per year over 19 years, with 5.2 million ounces of payable gold production over the conceptual mine life. At US$2,500/oz gold, Tower’s after-tax NPV5% is estimated at C$1.36 billion, and at US$3,200/oz gold, the after-tax NPV5% rises to C$3.30 billion.
The main weakness is equally clear: STLLR is still a developer, not a producer. Tower has a strong PEA, but the project still needs further technical studies, permitting, financing, and eventually construction. Colomac is also large and strategic, but it is located in the Northwest Territories, where logistics and infrastructure are more difficult than Timmins. Hollinger may offer nearer-term cash-flow potential, but it is lower grade and still needs execution.
The strongest upside comes from four things: Tower’s large-scale PEA, Colomac’s multi-million-ounce optionality, Hollinger’s near-term tailings opportunity, and STLLR’s very large resource base compared with its current market capitalization.
Projects / Location / MRE / Grades
Project 1: Tower Gold Project, Ontario – Flagship Development Asset
Tower is STLLR’s flagship project. It is located in the Timmins Mining Camp in Ontario, one of Canada’s most important gold districts. The project is close to the famous Destor-Porcupine Fault Zone, and the broader Timmins camp has produced more than 80 million ounces of gold over the past century.
Tower is designed as a large-scale open-pit and underground operation. The 2025 PEA outlines a conceptual mine life of 19 years, average annual production of 273,000 ounces of gold, peak annual production of 325,000 ounces, and total payable gold production of 5.191 million ounces, excluding pre-production gold.
Grade feel: Tower is a large-tonnage gold development project rather than a tiny ultra-high-grade deposit. The open-pit material is lower grade, while the underground material has better grade. Its strength is size, mine life, and leverage to gold price.
| Resource Category | Tonnes | Grade | Contained Gold |
| Indicated | 140.424Mt | 0.89 g/t Au | 4.002Moz Au |
| Inferred | 200.293Mt | 1.08 g/t Au | 6.961Moz Au |
| Open pit indicated | 135.230Mt | 0.84 g/t Au | 3.656Moz Au |
| Underground indicated | 5.194Mt | 2.07 g/t Au | 345,800 oz Au |
| Open pit inferred | 157.837Mt | 0.81 g/t Au | 4.134Moz Au |
| Underground inferred | 42.456Mt | 2.07 g/t Au | 2.827Moz Au |
| Tower PEA Metric | Value |
| Conceptual mine life | 19 years |
| Average annual gold production | 273,000 oz Au/year |
| Peak annual production | 325,000 oz Au |
| Total payable gold production | 5.191Moz Au |
| Average daily throughput | 26,030 tpd |
| Average gold recovery | 92.7% |
| Initial capex | C$1.873B |
| Sustaining capex | C$1.723B |
| AISC | US$1,537/oz Au |
| Base case gold price | US$2,500/oz |
| Base case after-tax NPV5% | C$1.355B |
| Base case after-tax IRR | 13.4% |
| Base case after-tax FCF | C$3.438B |
| Spot case at US$3,200/oz gold | C$3.298B after-tax NPV5%, 24.0% IRR, C$6.739B after-tax FCF |
Tower’s biggest positive is scale. Its biggest weakness is capex. Initial capex of C$1.873B is heavy for a junior developer, so STLLR likely needs a major financing package, strategic partner, stream/royalty, debt, equity, or possible takeover interest to unlock the project.
Project 2: Colomac Gold Project, Northwest Territories – Large Optionality Asset
Colomac is STLLR’s second cornerstone asset. It is located north of Yellowknife in the Northwest Territories and covers a massive 947 km² land package. STLLR describes Colomac as a large-scale, high-grade open-pit project surrounded by district-scale exploration upside.
| Resource Category | Tonnes | Grade | Contained Gold |
| Indicated | 70.432Mt | 1.50 g/t Au | 3.387Moz Au |
| Inferred | 24.434Mt | 2.17 g/t Au | 1.702Moz Au |
Colomac is attractive because it has size, grade, and a large underexplored land package. The main caveat is logistics. Northwest Territories projects can face more difficult access, seasonal roads, power, labour, camp infrastructure, permitting, and construction costs than Timmins.
Project 3: Hollinger Tailings Project – Near-Term Cash Flow Optionality
Hollinger is a tailings recovery opportunity in Timmins rather than a conventional hard-rock mine. It contains an estimated 50–60 million tonnes of historic mine tailings from the Hollinger Mine, which historically produced around 19 million ounces of gold.
| Hollinger Metric | Value |
| Project type | Historic gold tailings recovery opportunity |
| Estimated tailings | 50–60Mt |
| Maiden indicated resource | 412,000 oz Au at 0.35 g/t Au |
| Maiden inferred resource | 93,000 oz Au at 0.37 g/t Au |
| Metallurgical recovery test | 61.3% recovery by cyanidation |
| Key permit milestone | Ontario issued its first Recovery of Minerals Permit to Hollinger in February 2026 |
| Project feel | Potential lower-capex cash-flow kicker with environmental cleanup value |
Hollinger is not the main multibagger engine. Tower is. Colomac is the second major optionality asset. Hollinger is more like a strategic cash-flow kicker if STLLR can execute.
Share Structure / Ownership / Insiders
Capital Structure
| Capital Structure Metric | Value |
| Basic shares outstanding | 151,348,480 |
| RSU/DSU | 754,872 |
| Options | 12,055,187 |
| Warrants | 14,718,501 |
| Fully diluted shares | 178,877,040 |
| Recent share price used | Around C$1.50 |
| Recent market capitalization | Around C$268M |
Share structure feel: the share structure is reasonable for a company with this size of resource base, but it is not ultra-tight. The positive side is that STLLR has a huge resource base relative to its market cap. The negative side is that turning resources into a mine will require a lot of money.
Ownership / Insiders
| Ownership Group | Ownership |
| Institutional | 41% |
| Retail / HNW | 30% |
| Eric Sprott | 15% |
| Agnico Eagle | 11% |
| Management & Board | 3% |
This is a strong ownership profile. Eric Sprott and Agnico Eagle involvement are both positive signals. Agnico Eagle is especially important because it is one of Canada’s most respected gold producers. Management ownership is not very high at 3%, but the broader strategic shareholder base is strong.
People / Management
| Person | Role | Details | Management Feel |
| Keyvan Salehi | President, CEO and Director | Previously President and CEO of Nighthawk Gold; also worked in corporate development and technical services at Mountain Province Diamonds. | Important because he came through the Nighthawk side, which brought Colomac into STLLR. His challenge is disciplined project advancement. |
| Josef Vejvoda | Chairperson | Previously interim CEO of STLLR and former CEO of K2 & Associates Investment Management. | Brings capital markets and investment experience, useful for financing strategy and partnerships. |
| Blair Zaritsky | Director | CPA; previously CFO of Osisko Mining and CFO of O3 Mining. | Highly relevant Canadian gold-development experience; Osisko Mining background adds credibility. |
| Jennifer Wagner | Director | Director of Discovery Silver and Generation Mining; previously EVP Corporate Affairs and Sustainability Secretary at Kirkland Lake Gold. | Useful for permitting, stakeholder engagement, corporate affairs, and sustainability. |
| James Gagne | VP, Projects and Technical Services | Previously General Manager at Black Rock Engineering and Manager, Mining at Kirkland Lake Gold. | Important for engineering, project design, technical discipline, and development execution. |
| Meghan Shannon | VP, Sustainability and Regulatory Affairs | Previously worked with the Government of Ontario, including policy roles at the Ministry of Mines and related ministries. | Useful for Tower, Hollinger, regulatory work, sustainability, and stakeholder processes. |
Risks / Catalysts / Timeline
Key Risks
| Key Risk | Why It Matters |
| PEA risk | Tower’s PEA is preliminary and includes inferred resources. There is no certainty the PEA will be realized. |
| No reserve yet | Mineral resources are not mineral reserves and do not have demonstrated economic viability. |
| High capex risk | Tower requires estimated initial capex of C$1.873B, which is large for STLLR’s current market cap. |
| Financing risk | STLLR will likely need major financing, a strategic partner, or a takeover scenario to build Tower. |
| Dilution risk | Future equity raises could dilute shareholders. |
| Permitting risk | Tower, Colomac, and Hollinger all require regulatory approvals and stakeholder support. |
| Execution risk | STLLR must move from resource ownership to technical study advancement, permitting, financing, construction, and operations. |
| Colomac logistics risk | Northwest Territories projects can face access, power, labour, weather, and infrastructure challenges. |
| Metallurgy and grade-control risk | Large gold systems require reliable recoveries, dilution control, and disciplined mine planning. |
| Commodity price risk | STLLR is highly leveraged to gold price. This is positive in a bull market, but dangerous if gold weakens. |
Catalysts
| Timing | Key Milestone |
| 2026 | Continued Tower drilling and resource conversion |
| 2026 | Further advancement of Tower toward PFS / FS |
| 2026 | Environmental baseline work and impact assessment progress |
| 2026 | Potential Tower project financing or strategic partnership |
| 2026 onward | Colomac exploration and future technical updates |
| 2026 onward | Hollinger permitting and potential near-term cash-flow development |
| Medium term | Higher gold price improving Tower and Colomac economics |
| Medium term | Potential interest from larger gold producers looking for Canadian development ounces |
| Medium term | Possible market re-rating if investors begin valuing STLLR closer to its resource scale |
| 24–48 months | Forward-looking milestones include advancing Tower toward PFS/FS, completing environmental baseline work, and submitting an impact assessment in around 30 months |
Expected Timeline to Full Production
| Year / Period | Expected Progress Toward Production |
| 2026 | Technical progress and market recognition. Tower already has a 2025 PEA, so the next step is engineering, infill drilling, permitting work, and future study advancement. Hollinger may become more important if STLLR demonstrates a lower-capex cash-flow path. |
| 2027–2028 | Advance Tower toward a stronger technical study, likely PFS or FS-level work. The market will focus on capex, permitting, mine design, resource conversion, and financing. |
| 2029 onward | If Tower advances successfully, STLLR could shift from developer to construction candidate. Because Tower is large-capex, the most realistic path may involve a strategic partner, major producer investment, or corporate transaction. |
Valuation Summary
FCF Multiple Model at US$6,000/oz and US$7,000/oz Gold
This is a simplified free cash flow valuation model. It uses Tower’s published PEA life-of-mine after-tax free cash flow as the base, then adds gold-price upside using the PEA payable gold production and exchange rate. It does not adjust for higher taxes, royalties, inflation, cost escalation, financing costs, debt, future dilution, construction delays, or changes in mine plan.
| Base Assumption | Value |
| Base gold price | US$2,500/oz |
| FX rate | 1.34 USD/CAD |
| Payable gold production | 5.191Moz |
| Mine life | 19 years |
| Base case after-tax FCF | C$3.438B |
| Spot case after-tax FCF at US$3,200/oz gold | C$6.739B |
| Share count used | 178,877,040 fully diluted shares |
| Gold Price | Asset | Avg Annual FCF | 10x FCF/share | 15x FCF/share | 20x FCF/share |
| US$6,000/oz | Tower | C$1.462B | C$81.75 | C$122.62 | C$163.50 |
| US$7,000/oz | Tower | C$1.828B | C$102.22 | C$153.32 | C$204.43 |
Important note: These numbers are extremely sensitive to gold price, financing, taxes, construction cost, timeline, and future dilution. This is not a near-term price target. It is a high-gold-price optionality model showing how powerful Tower could become if the PEA is realized and gold trades at much higher prices.
Summary & Quick Scorecard
| Category | Details |
| Stock ticker | STLLR Gold Inc. TSX: STLR / OTCQX: STLRF |
| Main metal | Gold |
| Project phase | Advanced developer / PEA-stage gold developer |
| Main projects | Tower, Colomac, Hollinger |
| Project country | Canada |
| Main jurisdiction | Ontario and Northwest Territories |
| Combined MRE | 7.8Moz indicated + 8.8Moz inferred |
| AISC | Tower PEA AISC of US$1,537/oz Au |
| Production potential | Tower PEA average 273,000 oz Au/year over 19 years |
| Category | Checklist | Overall |
| 1. Management | Previous successful project, discovery, mine build, or company sale: Yes Exploration to development: Yes Big mining company experience: Yes Strong capital markets track record: Yes | Strong |
| 2. Projects | High grades: Yes for parts of Colomac and Tower underground MRE size: Yes, very large Optionality: Yes, Tower + Colomac + Hollinger | Strong |
| 3. Cost Structure | Low AISC: Yes Low capex / existing infrastructure: Mixed Tower has strong scale, but capex is high at C$1.873B. Hollinger may offer lower-capex optionality. | Good |
| 4. Share Structure Discipline | Fully diluted shares: 178,877,040 Fully diluted market cap: around C$268M using recent share price | Strong |
| 5. Insider / Ownership | Strong strategic ownership, insider aligned overall around 30%. STLLR lists Eric Sprott at 15%, Agnico Eagle at 11%, institutions at 41%, and management/board at 3%. | Strong |
| 6. Location | Tower and Hollinger are in Timmins, Ontario, a Tier 1 mining jurisdiction. Colomac is in the Northwest Territories, which is still Canada but more remote and logistically harder. | Strong |
RT Rating, Commentary
STLLR Gold is on our watchlist.
We rate this as 5 out of 5 stars.
STLLR Gold ticks many of our checklist boxes: huge gold resource, Tier 1 Canadian exposure, strong strategic shareholders, serious production scale at Tower, and major optionality from Colomac and Hollinger. The market cap looks very low compared with the size of the gold inventory and Tower’s PEA value.
The main things holding it back from a perfect setup are high capex and the path to production. Tower is a big project, but it is expensive to build. STLLR will need major financing, a strategic partner, or possible takeover interest to fully unlock the value. Colomac adds major upside, but its remote location makes it more complex. If gold prices stay strong and the company continues advancing Tower, the upside could be very large. But this is still a development-stage story, not a producer yet.
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