Mendell Helium plc (AQSE: MDH) is entering a more important stage in its development. When we last looked at the company the central question was whether a small US focused helium producer could move beyond a single producing well and begin building a more scalable production base.
That question has now become more immediate, because Mendell has announced its proposed admission to AIM, with ordinary shares expected to commence trading during the week beginning 15 June 2026, while the company also plans to withdraw its ordinary shares from trading on the Aquis Stock Exchange.
The move matters because it comes at the same time as Mendell’s operational story has become more active. Since the previous article, the company has provided an update on drilling the Rost Twin well, announced a proposal to install a helium production facility, secured a jumbo tube trailer, completed the acquisition of M3 Helium Corp., and added further leases in Fort Dodge. Taken together, these updates suggest that Mendell is no longer simply trying to prove that it can produce helium. It is now trying to show that production can be expanded, processed, transported and supported by a more mature market listing.
That does not mean the investment case has become risk free. The company’s £5 million placing and subscription brought in capital for the next stage of development, but the share price also pulled back from above 7p to around 4.5p after the announcement. That makes the AIM move an important moment, but not a conclusion in itself. For retail investors, the next phase of Mendell’s story will be judged by whether the company can turn a stronger platform, a larger asset base and wider market visibility into measurable production growth.
What The AIM Schedule One Tells Investors
The AIM Schedule One notice gives investors the clearest signal yet that Mendell Helium is preparing to move onto a larger public market. The company said its ordinary shares are expected to commence trading on AIM during the week beginning 15 June 2026. At the same time, Mendell intends to withdraw its ordinary shares from trading on AQSE in late June 2026, meaning this is not being presented as a dual listing, but as a transfer of its public market profile from AQSE to AIM.
The detail also matters. The Schedule One states that 340,761,938 ordinary shares are expected to be admitted to AIM, that no new ordinary shares are being issued or allotted as part of the admission, and that the anticipated market capitalisation on admission is approximately £15 million. That is important because the funding step has already taken place through the company’s £5 million placing and subscription, so the AIM move is more about visibility, positioning and access to a wider investor base than raising new money on admission.
For retail investors, this makes the proposed AIM admission a useful marker of corporate maturity. Mendell is trying to move from being a small AQSE-listed helium producer into a company with broader investor reach at the same time as its asset base and development plans are expanding. The Schedule One also describes Mendell as a helium producer in Kansas operating through its wholly owned subsidiary M3 Helium, which helps underline how much the company’s identity has now become tied to the Fort Dodge production platform. The listing change does not remove operational risk, but it does place the company in front of a larger pool of investors at a more active point in its development.
Why Leaving AQSE Matters Now
Leaving AQSE for AIM matters because Mendell Helium is trying to change how the market sees the company. AQSE has provided the company with a public listing, but AIM is generally the more visible London market for small and mid-sized growth companies, including natural resources businesses.
The timing is important. Mendell is not seeking AIM admission before proving anything at the asset level. The company has already reported that production at Rost 1-26 commenced in early November 2025, that the well had a most recently recorded flow rate in December 2025 of 250 Mcf per day, and that M3 Helium has drilled a second well, Rost 2-26, which is being completed. That gives the move more substance than a simple change of venue, because it is happening alongside a wider operational build-out.
However, investors should not treat the AIM move as a value creator on its own. A larger market can improve visibility and may support liquidity, but it cannot replace execution. Mendell still needs to deliver on drilling, recompletions, processing, transport and production growth, including the workstreams described in its Fort Dodge development plans. AIM may give the company a bigger platform, but the valuation case will still depend on what happens at Fort Dodge.
The £5 Million Raise And The Share Price Pullback
The most important financing update since our previous article was Mendell’s decision to raise £5 million before expenses through a placing and subscription. The company said the fundraise was being carried out through the issue of 125,000,000 new ordinary shares at 4p per share, and linked the proceeds to accelerated Fort Dodge development. The same announcement referred to plans including completion operations on Rost 2-26, recompletion work on Schneweis Ventures 13, the drilling of four further new wells in Fort Dodge, and the construction of a second helium purification plant during 2026.
The market reaction, however, was more mixed than the growth narrative alone might suggest. The placing price represented a discount of approximately 34.7% to the closing middle market price of 6.125p on 29th April 2026, and the company’s share price fell back to around 4.5p after the announcement. That pullback does not necessarily undermine the long-term story, but it does show that investors were weighing the benefit of new capital against dilution and the price at which that capital was raised.
For retail investors, this is an important part of the article because it keeps the story balanced. Mendell needed funding to accelerate development, and raising money ahead of AIM admission gives the company more financial flexibility. At the same time, small-cap resource companies are often judged harshly when new shares are issued, especially when the placing price sits well below recent trading levels. The key question now is whether the £5 million can be converted into visible progress at Fort Dodge quickly enough to justify the dilution.
M3 Helium Is Now Inside The Group
One of the most important changes since the previous article is that M3 Helium is no longer simply the operating partner behind the Mendell story, it is now fully inside the listed group. Mendell confirmed that shareholders had approved the transaction and that the company had completed the acquisition of M3 Helium Corp. on 18th May 2026. That matters because it gives shareholders more direct exposure to the operating helium assets rather than relying on a looser commercial relationship or option structure.
The acquisition also brought Paul Mendell formally onto the board as Chief Technical Director, adding operational experience at a point when the company is trying to move from early production to wider field development. The same announcement noted that he had interests in more than 200 producing oil and gas wells in the US, and that he had previously founded Mendell Energy, a Denver-based oil and gas producer acquired for $12 million in 2012. For a small helium company entering a more active development phase, that technical and operating background is relevant.
The Schedule One notice then reinforces how central M3 has become to the story. It describes Mendell as a Kansas helium producer operating through its wholly owned subsidiary M3 Helium, with M3 holding interests across Fort Dodge and the wider Hugoton gas field. That makes the AIM move more than a market transfer. It is happening after the operating asset base has been brought into the listed company, which should make future production updates, funding decisions and valuation debates more directly tied to Mendell’s own balance sheet and shareholders.
Fort Dodge Remains The Core Growth Engine
Fort Dodge remains the centre of the Mendell Helium investment case. The company’s AIM Schedule One describes M3 Helium as holding interests in twelve helium and natural gas wells, including six producing wells, with the core operating focus sitting in Kansas. That matters because Mendell is not trying to build its story around a single isolated well. It is trying to show that Fort Dodge can become a broader production system.
The recent lease expansion also supports that direction. Mendell announced that M3 had secured further leases in the Fort Dodge area, increasing its land position around the project and giving the company more room to develop future drilling opportunities. For a producer looking to scale, that is important because a wider footprint can provide additional well locations, operational flexibility and a stronger base for infrastructure planning.
The key point for investors is that Fort Dodge has moved from proof of concept to development platform. The previous article focused on whether Mendell could move from a single producing well to something more scalable, and Fort Dodge is where that question will be answered. If the company can use the M3 acquisition, new leases, funding and processing plans to grow repeatable production, Fort Dodge could become the asset that defines Mendell’s next stage on AIM.
Rost 1 And Rost Twin: From Proof Point To Replication Test
Rost 1 remains the proof point behind the Mendell Helium story. The AIM Schedule One states that production at Rost 1-26 commenced in early November 2025, and that its most recently recorded flow rate in December 2025 was 250 Mcf per day, with helium content of 5.1%. For a small helium company, those numbers are important because they move the story beyond theoretical acreage and into measured production performance.
The next test is whether that result can be repeated nearby. Mendell announced that the Rost Twin well, also referred to as Rost 2-26, was being drilled approximately 330 feet from the original Rost 1-26 well. That close spacing matters because it gives investors a practical test of continuity within the reservoir. If Rost Twin confirms similar characteristics, the Fort Dodge story becomes less dependent on one successful well and more credible as a repeatable development model.
This is why the Rost Twin is more important than a routine drilling update. Mendell is trying to prove that Fort Dodge can support a multi-well production approach, not just one productive location. The company’s later AIM Schedule One confirms that Rost 2-26 has been drilled and cased and is being completed, making it one of the most important near-term operational milestones. For retail investors, the next meaningful step is not simply that a second well exists, but whether it can flow commercially and validate the wider field development case.
The Production Facility Proposal Changes The Scale Conversation
The proposed helium production facility is important because it moves Mendell’s story from drilling success towards commercial handling capacity. In April 2026, the company announced a proposal to install a helium production facility at Fort Dodge, following discussions with Scout Energy Partners and Tumbleweed Midstream. That matters because producing helium from the ground is only part of the challenge. The company also needs the infrastructure to process, separate and monetise that gas efficiently.
The proposed first phase was described as a facility capable of processing 1,000 Mcf per day of raw gas, assuming approximately 5% helium content, which would equate to around 50 Mcf per day of helium production. For a company of Mendell’s size, that is a meaningful step because it starts to define what scaled production could look like in practical terms. It also gives investors a clearer way to think about future wells, because additional drilling only becomes more valuable if the company has the processing route to handle the output.
The proposal also fits with Mendell’s wider operational build-out. The company later announced that it had secured a jumbo tube trailer, which is relevant because transport and logistics are part of turning field production into saleable product. This is where the story becomes more tangible. If Fort Dodge is to become a proper growth engine, Mendell needs not only producing wells, but also processing capacity, transport options and a repeatable field development plan.
Further Fort Dodge Leases And The Push For A Larger Footprint
Mendell’s expansion at Fort Dodge is not limited to the Rost wells. In May 2026, the company announced that M3 Helium had signed the Durler and Leffert leases, both located close to its existing Bleumer and Enlow leases and around four miles from the Rost 1-26 and Rost 2-26 well sites. That proximity matters because small resource companies can often create more value when acreage, wells, disposal capacity and processing plans are clustered rather than scattered across disconnected locations.
The company said each of the Durler and Leffert leases could potentially accommodate two production wells. If that potential is confirmed, the new leases could add further depth to the Fort Dodge development plan and give Mendell more optionality after Rost Twin and the current near-term work programme. The update also made clear that these leases were secured after the £5 million fundraise, which supports the view that the raise was intended to accelerate activity rather than simply strengthen the balance sheet.
This is important because the investment case increasingly depends on whether Fort Dodge can become a repeatable production system. More leases do not automatically create value, and investors will still need to see drilling results, flow rates, processing capacity and commercial returns. However, a larger and more concentrated footprint gives Mendell a clearer pathway to build scale if the geology continues to cooperate. For a company preparing to move to AIM, that wider Fort Dodge position helps explain why the story is starting to look more like a development platform than a single-well producer.
What Still Needs To Be Proven
Despite the progress, Mendell remains at an early stage in its development as a production-led helium company. The company has reported that Rost 1-26 commenced production, that Rost 2-26 has been drilled and cased, and that the Fort Dodge development plan includes further recompletions and additional new wells funded by the recent £5 million placing and subscription. That is a stronger position than the company was in when it was mainly being judged on one producing well, but it also raises the execution bar.
The most important near-term test is whether Mendell can replicate production beyond Rost 1-26. A flow rate of 250 Mcf per day and helium content of 5.1% give investors a useful benchmark, but the market will now want confirmation that Rost Twin and future Fort Dodge wells can perform in a similar way. If the additional wells underperform, the growth story becomes harder to support. If they deliver, the investment case becomes much more credible.
Funding and infrastructure also remain important risks. The proposal to install a helium production facility, the jumbo tube trailer, and the move to AIM admission all help create the framework for scale, but none of them guarantees commercial success. Mendell still needs to show that it can turn a larger footprint, fresh capital and better market visibility into sustained production, saleable helium and stronger financial results.
Investor Reflection: A More Serious Story, But Still An Execution Story
Mendell Helium now looks more substantial than it did when we last covered the company. The earlier article framed the investment case around the move from single well production to scalable growth, and the latest news flow suggests that transition is now actively underway. The proposed AIM admission, completed M3 Helium acquisition, expanded Fort Dodge lease position, and recent £5 million fundraise all point to a company trying to move onto a larger operating and market platform.
The attraction for investors is that Mendell is not starting from a blank sheet. The company has reported production from Rost 1-26, has drilled and cased Rost 2-26, has outlined a proposed helium production facility, and has secured a jumbo tube trailer to support transport logistics. Those are practical steps, not just promotional language. They give the company a clearer route to scale than it had when the story was mostly centred on one producing well.
Even so, the next stage will depend on delivery rather than structure. AIM admission may improve visibility, and the £5 million raise may accelerate development, but neither automatically creates production growth or shareholder value. Mendell still needs to prove that Fort Dodge can support repeatable well performance, that infrastructure can be delivered, and that helium output can grow in a way that justifies the dilution shareholders have already absorbed. For now, the company looks more serious, better funded and more visible, but it remains an execution story, and the market will increasingly judge it on results rather than potential.
Disclaimer: The information presented in this article represents the views and analysis of the author and is provided for informational purposes only. It should not be interpreted as financial, investment, or legal advice. Investors should conduct their own due diligence and consult a qualified adviser before making investment decisions. Investing in AIM-listed companies involves risk, and past performance is not indicative of future results.
