The Hook
Alexander Green’s Oxford Club has a new favorite story, and it leans hard on the one name that reliably moves newsletter readers: Elon Musk. The pitch is “Elon’s Secret xPhone Partner: The Tiny Supplier SpaceX Can’t Replace,” sold through Green’s Oxford Microcap Trader service at $1,995 a year with no refunds, only a 90-day “credit” guarantee. The hook is a familiar countdown to a device revolution: “Elon Musk could completely transform the way 8 billion people connect… ending the era of cell towers, dead zones, and expensive phone bills forever.”
The ad opens by reaching for the Apple comparison: “I Haven’t Been This Excited Since Apple at 20 Cents.” The framing is that SpaceX is quietly assembling a handheld “xPhone” that will supplant the iPhone, with Starlink serving as the “cell towers” and the Starmind constellation as “data centers in space.” And the entire thesis rests on one tiny supplier of advanced amplifiers that Musk allegedly cannot source from anyone else.
But here is what the teaser slides past: Filtronic’s amplifiers support Starlink backhaul, the data moving between satellites and ground stations. They are not the direct satellite-to-phone chips that a hypothetical xPhone handset would need.
The Big Claim
The headline number is a 10X return in 24 months or less. The order form says “when the market realizes this $750 million company is the lynchpin of Elon Musk’s trillion-dollar ambitions, Alex predicts it could soar 10X or more in the next 24 months (or less)!” Green claims Musk “has quietly spent over $40 billion assembling every piece he needs to launch a phone” and that the xPhone “puts an AI in your pocket, with sky as its data center.” He positions this as the third device revolution in our lifetimes: the personal computer in 1984, the iPhone in 2007, and now the xPhone.
The specific company is described as “roughly 2,000 times smaller than SpaceX,” trading “around $3 a share,” and the ad says it has spent “nearly 50 years obsessing with one single problem: how to push a radio signal harder, cleaner, and farther than anyone else.”
Green’s Oxford Club has a long promotional history. We covered their ASI Fund pitch for alternative-asset 401(k) investing earlier this year, and the pattern is the same: a real financial theme, inflated with return claims that the underlying asset cannot support.
The Mechanism
This is a component-supply story, not a handset story, and the distinction matters. Stock Gumshoe’s Thinkolator identifies the pick as Filtronic PLC, a UK radio-frequency engineering firm listed on London’s AIM (symbol FTC) and the OTC in the US (FLTCF). Filtronic makes Solid State Power Amplifiers, or SSPAs, built on gallium nitride (GaN), a semiconductor material that handles high frequencies and high power efficiently.
These are the E-Band amplifiers used for satellite backhaul, the ground-to-satellite data links that carry traffic for constellations like Starlink. We have a full breakdown of Filtronic’s business and financials and a separate look at the Starlink supplier ecosystem that Filtronic sits inside.
The facts in the ad check out as far as they go. In April 2024, Filtronic did enter a strategic partnership with SpaceX, and the first order was described as worth roughly as much as Filtronic’s entire prior year of revenue. SpaceX took equity warrants, initially up to a 10% stake, expanded to 15% in March 2025, with vesting now tied to deliveries rather than orders. That is a real, verifiable relationship, and it is the reason Filtronic’s stock became a momentum favorite during the spring run-up in “space” stocks.
But here is the nuance the promo slides past. Filtronic’s amplifiers support the Starlink constellation’s backhaul and payload supply chain. They are not the direct satellite-to-phone chips that a hypothetical xPhone handset would need. Stock Gumshoe is careful on this point: the business is “largely E-Band amplifiers, used for satellite backhaul data… not for direct satellite-to-phone connections.” Filtronic is reportedly developing amplifiers and filters “tuned” for inter-satellite and direct-to-device frequencies, which could expand the market, but that is a future possibility, not the current revenue.
There is also a macro backdrop worth naming, because it is the honest version of this story. Direct-to-device satellite connectivity is a real and fast-growing market, with SpaceX, AST SpaceMobile, and Apple all pushing into it. Amplifier suppliers genuinely sit at a chokepoint in that build-out. So the underlying sector tailwind is real. What is not real is the leap from “supplies amplifiers for Starlink backhaul” to “is the lynchpin of a device that will replace the iPhone.”
The Real Pick
| Ticker | Company | Recent Close | Market Cap |
|---|---|---|---|
| FLTCF | Filtronic PLC | $3.58 (Sep 9, 2026) | ~$750M (ad) |
Filtronic’s US OTC quote (FLTCF) closed at $3.58 on September 9, 2026. The ad describes the stock as “around $3 a share,” so the tease reference is already slightly stale. Volume on the pink sheets is thin (about 875,000 shares on the day of the close), and Stock Gumshoe notes the low-volume OTC listing means “we’re not likely to see it get a lot of institutional attention anytime soon.” Filtronic primarily trades on London’s AIM, where it reports twice a year like many UK firms.
Does the Math Check Out?
Put the 10X claim against the actual financials and it falls apart quickly. A 10X move on a roughly $750 million company implies a valuation near $7.5 billion within two years. Filtronic’s revenue has not been growing; it has been flat. The last four semi-annual revenue figures were £25.6 million, £30.7 million, £25.3 million, and £30.3 million. That is stasis, not momentum, and the most recent full fiscal year saw revenue fall about 1%.
The ad’s “Sales grew 244% over the past two years” and “up 56% one year, then 121% the next” are technically traceable to a real event, but it is the one-time jump from the first large SpaceX order in the fiscal year ending May 2025. Using that as the run-rate is like citing a company’s IPO pop as its growth rate. The most recent year was, by the numbers, disappointing.
On valuation, analysts expect roughly £62 million of revenue in the current fiscal year (about 20% growth) and £75 million the following year. At £62 million, roughly $80 million in US dollar terms, a $7.5 billion target would be about 90 times sales. Forward earnings are even more stretched: analysts project only about 4 cents in adjusted EPS next year, which means the stock already trades near 80 times forward earnings. To justify a 10X move, Filtronic would need to sustain a premium normally reserved for the fastest-growing semiconductor franchises while remaining almost entirely dependent on one customer.
That concentration is the risk the promo never mentions. SpaceX was about 60% of Filtronic’s revenue last year, down from over 80% the year before. That is improving, but it is still a company whose fate is tied to a single customer with a well-documented habit of vertical integration. Tesla and SpaceX repeatedly bring suppliers in-house, and Stock Gumshoe flags this directly: “Elon Musk’s companies prefer to develop vertical integration, which makes suppliers uncertain.”
And the warrants? The promo holds up SpaceX’s warrants as the strongest possible endorsement: “In 40 years, I’ve never seen a stronger vote of confidence.” But warrants-for-orders is now a routine Big Tech supplier-financing practice, not insider buying. Amazon extracted warrants from Rivian for delivery vans, from Cargojet for Prime Air, from Astera Labs and Qualcomm for AWS deals. AMD offered OpenAI warrants in a recent compute agreement, and Alphabet took Marvell warrants for its TPU program. The warrants are a cost Filtronic paid to secure and keep its most important customer, not evidence the stock is mispriced.
What They Got Right
- The core fact is real. Filtronic is a genuine SpaceX supplier, with a real April 2024 partnership, real orders, and real equity warrants. This is not a fabricated company or a fictional contract.
- The niche is genuinely interesting. GaN power amplifiers for high-frequency satellite links are specialized, hard-to-replicate hardware, and Filtronic may be among the few suppliers that can ramp to SpaceX’s specific frequency requirements.
- Revenue visibility is better than most small caps. SpaceX has committed to ongoing orders that support shipments through roughly fiscal 2028, which gives Filtronic about two more years of contracted demand.
- The “customer is buying in” framing has a kernel of truth, even if it is oversold. A warrant structure tied to deliveries does align SpaceX’s incentives with Filtronic’s ramp, which is a real, if modest, positive.
What They Got Wrong
- “Sales momentum” is contradicted by the actual semi-annual revenue, which has been flat for a year. The ad’s 244% figure cherry-picks the one-time jump from the first SpaceX order.
- The 10X-in-24-months claim implies a roughly $7.5 billion valuation on a company already trading near 15 times sales and 80 times forward earnings with 1% recent revenue growth.
- The “replace the iPhone” narrative inflates the actual business. Filtronic’s amplifiers serve Starlink backhaul, not the handset, so the “third device revolution” is a marketing frame rather than a revenue model.
- The “SpaceX can’t replace them” framing downplays both the competitor set, which includes MACOM, Teledyne, Qorvo, and Stellant Systems, and SpaceX’s own history of vertical integration.
- The warrants are presented as a unique vote of confidence when supplier warrants are now standard practice across Big Tech.
The Verdict
Filtronic is a legitimate, interesting company and a real SpaceX supplier with a defensible niche in a genuinely growing market. If it draws your attention, the right question is whether its GaN amplifier business keeps scaling as the Starlink constellation grows and whether it can diversify beyond one dominant customer, not whether the stock goes up 10X. The promo’s headline number is marketing, not math. Watch the company’s annual general meeting on October 30 and SpaceX’s next earnings, estimated for November 5, for any order or guidance updates, and evaluate Filtronic on its own fundamentals rather than the xPhone story.
This is not financial advice. NewsletterVetter has no position in any stock mentioned.