Latrobe Magnesium (ASX: LMG): South Carolina Plant Plan Drives a 40% Session and the Week's Top Momentum Gain
Written by Christopher Hall, AdvDipFP | Authorised Representative, AFSL 526688 | September 2026
Latrobe Magnesium Limited (ASX: LMG) is developing Australia's first commercial magnesium metal process, extracting magnesium oxide from brown-coal fly ash at its Latrobe Valley Demonstration Plant. On 15 September 2026 the stock rose 40.00% in a single session and posted the single largest weekly gain of any name on the Finer Market Points momentum list — +88.89% — after the company announced plans for a 50,000-tonne-per-annum primary magnesium metal plant in South Carolina, USA.
LMG's 15 September 2026 ASX announcement, "LMG to Pursue Strategic 50ktpa Magnesium Metal Plant in USA," confirmed the company will pursue a 50,000-tonne-per-annum primary magnesium metal plant at a preferred site in South Carolina — a project it describes as the first new commercial-scale primary magnesium producer built in North America in decades. Letters of intent covering 32,000tpa, around 64% of the plant's Phase 1 capacity, have been signed, including an in-principle commitment from Metal Exchange LLC — LMG's US distribution partner since 2019 — to expand its agreement to at least 25,000tpa, plus 5,000tpa from Meridian Lightweight Technologies and 2,000tpa from Twin City Die Castings. Feedstock is fully covered under LMG's existing 20-year binding ferronickel slag memorandum of understanding with Société Le Nickel (Eramet), and Bechtel has been nominated as preferred engineering partner. LMG's own indicative economics put the project's capital cost at US$1.1–1.5 billion and EBITDA at US$320–615 million a year, with an unlevered IRR of 18–26%, a final investment decision targeted for March 2028 and first production targeted for April 2030 — all of it conditional on completing the site purchase, securing project finance and finalising binding logistics and utilities agreements.
"This strategic update is the culmination of years of pioneering and tireless work by David Paterson and the Latrobe Magnesium team. LMG is uniquely positioned to capitalise on this opportunity given our intellectual property and capabilities, which can help solve the United States' critical magnesium supply gap." — Robert Stein, incoming Chief Executive Officer, Latrobe Magnesium, ASX announcement, 15 September 2026
The comment frames the South Carolina plan as a continuation of the company's existing Victorian Demonstration Plant work rather than a new, unrelated initiative — the plant's Stage 1 magnesium oxide output is already fully allocated to the US market under Latrobe's existing Metal Exchange LLC distribution agreement.
Latrobe Magnesium Limited (ASX: LMG) held the #3 position on the Finer Market Points ASX momentum ranking for 15 September 2026, driven by the single largest weekly gain on the list that day — +88.89%, the #1 weekly return recorded — against a quarterly gain of just 6.25% (ranked #162 on that measure), and carried no prior Launch Pad entry as of that reading. The gap between the weekly and quarterly figures is itself informative: this is a fresh, single-catalyst move rather than a name that has been building a multi-month uptrend.
Metric | Value |
Momentum ranking (FMP, 15 Sep 2026) | |
Weekly performance rank | |
Weekly performance | +88.89% |
Quarterly performance rank | |
Quarterly performance | +6.25% |
Single-day move, 15 Sep 2026 | +40.00% |
Launch Pad entry | Not yet recorded as of this reading |
Sector (plain English) | Critical minerals — magnesium metal production, from waste fly ash |
Data source | FMP Momentum Research, 15 September 2026 (intraday) |
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Frequently Asked Questions
What does Latrobe Magnesium Limited (ASX: LMG) do?
Latrobe Magnesium is developing a patented process to extract magnesium metal and cementitious material from fly ash, a waste by-product of brown-coal power generation, at its Demonstration Plant in Victoria's Latrobe Valley. The company is separately progressing plans for a 50,000-tonne-per-annum primary magnesium metal plant in South Carolina, USA.
Why did Latrobe Magnesium shares rise so sharply on 15 September 2026?
Latrobe Magnesium rose 40.00% intraday on 15 September 2026 after its ASX announcement confirming it will pursue a 50,000tpa magnesium plant in South Carolina, backed by letters of intent for 32,000tpa (about 64% of Phase 1 capacity), a preferred site, and a State of South Carolina incentives package. The same reading recorded the largest weekly gain of any stock on the Finer Market Points momentum list that week, at +88.89%.
What is the South Carolina plant Latrobe Magnesium announced?
A proposed 50,000-tonne-per-annum primary magnesium metal plant, which Latrobe Magnesium describes as the first new commercial-scale primary magnesium producer of its kind built in North America in decades, with scope to expand to 100,000tpa. The company's own indicative economics put the project's capital cost at US$1.1–1.5 billion and EBITDA at US$320–615 million a year, with a final investment decision targeted for March 2028 and first production targeted for April 2030 — all conditional on completing the site purchase, securing project finance and finalising binding logistics and utilities agreements.
Who are Latrobe Magnesium's letters-of-intent customers for the South Carolina plant?
The 32,000tpa of letters of intent disclosed on 15 September 2026 include an in-principle commitment from Metal Exchange LLC — Latrobe Magnesium's existing US distribution partner — to expand its agreement to at least 25,000tpa, plus 5,000tpa from Meridian Lightweight Technologies and 2,000tpa from Twin City Die Castings. The letters of intent are non-binding and the company intends to convert them into binding offtake agreements alongside project financing.
Is Latrobe Magnesium a magnesium producer?
Not yet at commercial scale. Latrobe Magnesium operates a Demonstration Plant in Victoria and is progressing toward first magnesium metal production there in the second half of 2026; the announced South Carolina facility is a development-stage plan targeting first production in April 2030, not an operating plant. A momentum-list appearance measures recent price momentum, not production status or investment merit.
Is Latrobe Magnesium a top critical minerals stock?
It is one of a number of ASX-listed companies pursuing critical minerals and battery/industrial metals projects. Its appearance at the top of the FMP momentum list for 15 September 2026 reflects that week's price momentum following a specific announcement, not a ranking of company quality, resource size or investment merit — this is general educational information, not a recommendation.
Sources
Latrobe Magnesium Limited, ASX Announcement, 15 September 2026 — "LMG to Pursue Strategic 50ktpa Magnesium Metal Plant in USA."
FMP Momentum Research — momentum ranking, weekly and quarterly performance data for LMG, 15 September 2026 (intraday).
This content is for educational purposes only and does not constitute financial advice. Past performance is no guarantee of future results. Consider your financial situation and seek professional advice before making investment decisions.
Finer Market Points Pty Ltd, CAR 1304002, AFSL 526688, ABN 87 645 284 680. This general information is educational only and not financial advice, recommendation, forecast or solicitation. Consider your objectives, financial situation and needs before acting. Seek appropriate professional advice. We accept no liability for any loss or damages arising from use. Authors and presenters may hold positions in discussed companies and investment products.
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