Key points
- Druckenmiller's 12.7% Guardian Metal (GMTL) stake surfaced on EDGAR Monday
- He bought the shares at 55p in August 2025
- The full original block was still held on March 31
- Nevada tungsten, with $6.2M of Department of War money
A Schedule 13G filed Monday reports that Stanley Druckenmiller's family office held 12.7 percent of Guardian Metal Resources (GMTL) as of March 31. The share count matches the block Duquesne bought in August 2025.
That block is 24,699,825 ordinary shares in a Nevada tungsten developer. Duquesne Family Office LLC and Druckenmiller himself are both named on the cover page, with shared voting and shared selling power over all of it. A second version of the same filing arrived right behind the first, and neither one is a purchase. Both landed on our Duquesne page, which lists the fund's recent SEC filings above its 13F holdings. Guardian Metal shows up in the filings table and nowhere in the holdings table, because a 13F covers U.S. exchange-traded securities and the shares in this 13G trade in London. That's why a stake this size has stayed invisible to anyone tracking Druckenmiller through his quarterly filings.
Why the same filing went in twice
The first filing reports the stake under Rule 13d-1(c). The amendment changes that to Rule 13d-1(d) and explains itself in the comment box: "This Amendment #1 is being filed to correct an error in the originally filed Schedule 13G." Same 24,699,825 shares, same 12.7 percent, same day, one letter different.
That letter is the whole story. Rule 13d-1(d) is the version an owner uses when the shares were already in hand before the company registered them with the SEC. Guardian Metal completed its U.S. listing on March 20, 2026. So the correction is a public statement that Druckenmiller was on the share register before GMTL began trading on NYSE American.
He beat that listing to the register by nearly seven months. On August 19, 2025, Power Metal Resources announced it was selling out of Guardian Metal completely, and Guardian Metal confirmed the terms the same morning: 24,699,825 shares for £13,584,904, which works out to 55p each, to a fund managed by Duquesne. CEO Oliver Friesen said in that announcement that he was "delighted to welcome Duquesne as a major new shareholder, marking a strong endorsement of Guardian's position in the U.S. critical metals landscape." The deal closed on August 27. A standard London ownership notice followed two days later. It names Duquesne Family Office as the party with the reporting obligation and the Juggernaut Fund LP as the shareholder of record. The resulting position was 14.75 percent of the company.
Put that next to Monday's filing and the two share counts match: 24,699,825, digit for digit the block Power Metal sold. Seven months separate those two snapshots, and the count is the same at both ends. The percentage moved anyway, from 14.75 down to 12.7, because Guardian Metal kept printing shares. It told the London market on August 28 that it now has 198,797,008 in issue, up from about 167 million when the sale closed.
What the stake is worth, and the trap in pricing it
Power Metal took £13.6 million for the block. Guardian Metal's ordinary shares closed at 158p in London on Tuesday, so anyone still holding all 24,699,825 of them sits on about £39 million, or around $53 million, a gain of 187 percent since August of last year.
Here's where it's easy to land on a wildly wrong number. Guardian Metal also trades in New York under GMTL, but a GMTL share is an American depositary share, and each one stands for five ordinary shares. An ADS quote therefore runs about five times the London price. Multiply the 24.7 million ordinary shares in the 13G by an ADS quote and the answer comes out five times too big. The count in the filing is ordinary shares, so it's the London quote that prices it.
The company underneath the filing
Guardian Metal is an exploration company with no revenue and two tungsten projects in Nevada called Pilot Mountain and Tempiute. Tungsten goes into cutting tools, armor and munitions, and China mined 67,000 of the world's 85,000 tonnes of it last year, about 79 percent, according to the U.S. Geological Survey. That same report says the United States hasn't mined tungsten commercially since 2015. In July 2025, a month before Druckenmiller bought in, the U.S. Department of War put $6.2 million into Guardian Metal's American subsidiary under Title III of the Defense Production Act to pay for an engineering study of Pilot Mountain.
The finished study landed on June 30, 2026, prepared by two U.S. engineering firms under the SEC mining disclosure rules. It describes an open-pit mine producing 15,916 tonnes of tungsten trioxide over eight years, with an after-tax value of $660.3 million at an 8 percent discount rate and an internal rate of return of 59.6 percent. Friesen said production is targeted for the fourth quarter of 2028. Every one of those figures describes a mine that hasn't cleared permitting or found its construction money yet.
The news since has been about plumbing for that future. On September 10 the company signed an agreement with Oritain Global to build a chemical fingerprint database that can prove which ground a batch of tungsten came out of, which matters because U.S. defense procurement rules under Section 854 of the 2024 defense authorization act tighten on January 1, 2027. On Monday it published drilling results from two zones at Pilot Mountain that sit outside the mine plan in the June study. The whole company comes to £314 million at Tuesday's price, or about $423 million.
What Monday's filing leaves out
The most important limitation is timing. The event date on the cover page is March 31, 2026, so the ownership it certifies is nearly six months old. The amended filing uses Rule 13d-1(d), the exempt-investor route for an owner who acquired shares before the class was registered with the SEC. Unlike the passive-investor route, it does not certify that Druckenmiller holds the shares without an intent to influence the company. The filing says how many shares he held on March 31, not what he plans to do with them. We wrote up how 13Gs differ from the 13D an activist files in more detail.
The document itself runs to a share count, a percentage and a date. Everything a reader actually wants from it, the price paid, the reasoning, the plan from here, lives outside the paperwork. What it does add to the public record is narrow but real. A manager who has been buying the picks-and-shovels side of the AI and defense buildout, including a stake in the data center company IREN disclosed last month, carried a double-digit slice of an American tungsten developer from August 2025 through the end of March. What he did with it after March 31 is a blank the filing doesn't try to fill, and the stock has covered a lot of ground since, up to a 309p closing high in April and back to 158p on Tuesday.
The next scheduled update on the position is an annual amendment, unless the size changes enough to force an earlier one. If you're tempted to read a 12.7 percent stake as an instruction, our piece on copying disclosures from famous investors is worth five minutes first. You can also watch Guardian Metal's filings arrive yourself on our GMTL filings page.
Pound figures are converted at $1.35 to the pound, the rate on September 15, 2026.
