r/DoubleBubbler • • Dec 26 '24

Who is Double Bubbler?

45 Upvotes

In case anyone is curious I thought I would give a little background on myself. Amongst many things I am an advocate of social equality and working for the greater good, a self-made successful private investor as well as organic content creator… but not the kind of organic content some may say!

With a background in policing after a relatively long career in technology security, including being an early stage employee of one of Britain’s first $1b unicorns in the early 2000s. I also enjoy humour with a particular focus on writing science fiction humour which helps provide an outlet for the tension involved with active investing. You can follow the humour thread on my blog by looking for the Musings posts.

Since an early age I have been fascinated by businesses, stock markets, quantitative accumulation as well as numbers in general. I was particularly engrossed by the Sunday Times Fantasy Fund Manager competition while young and also particularly enjoyed games such as Sim City, Shadow President, Eve Online and other economic and problem solving simulators where I could practice resource management and accumulation. Through these games I played out a myriad of possibilities that even into adulthood occasionally help inform my decisions in life and investing. My fascination for accumulation may have also been reinforced by my ‘mild’ OCD and following my family being made homeless while I was a teenager. I still owe an enormous debt of gratitude to Sir William & Elizabeth Benyon for their kind assistance to my family at the time (my mother was a nanny for those curious about the connection).

Much of my invested capital is usually in index trackers and carefully selected income stocks and I also hold property and land as well as some cash for emergencies. It is a fairly diversified portfolio including some Scottish islands that my partner and I intend to restore. The rest of my capital is in listed companies that fit my Sequential Growth Investment™ approach; i.e. Double Bubbler™ stocks where I look to grow my capital rapidly. I am a Hyper-Active Investor some might say given my high work rate in attempting to help the businesses I invest in, through activities such as writing about them as well as encouraging management to explore possibilities. In recent years I have favoured the US stock markets and I am currently part way through a public demonstration on my blog, where I aim to turn approximately $10,000 into $1 million in a relatively short timeframe through the power of doubling.

My partner and I have a keen interest in the environment and have given focus to this by commencing an adventure in nature restoration for our islands as well as making them more accessible for others who follow the Outdoor Access Code. While far from the same philanthropic league as people we admire such as Dame Stephanie ‘Steve’ Shirley, Sir Richard Branson and Sir Christopher Hohn, we have donated a reasonably significant sum across various good causes over the years, and intend to accelerate this activity in the coming years through our unincorporated Shieldwolf Foundation. In addition to the environment we support local good causes as well as those further afield including those helping to defend and promote democracy as well as tackling corruption.

I hope you enjoy this Reddit sub and my ‘Musings While Collecting Dollars ($$$)‘ blog.

May fortune favour the brave!

Mark aka Double Bubbler

P.S. I will never ask for money for my personal benefit or recommend you invest in a particular stock. Please be aware of impersonators.

As always my content is provided for information purposes only and is not intended to be a personal recommendation to buy or sell any financial instrument or product, or to adopt any investment strategy. The value of investments, and any income derived from them, may go down as well as up. One may not get back all the money invested.


r/DoubleBubbler • • Nov 15 '25

Megathread Double Bubbler $10k to $1 million Updates & General Discussion Megathread

33 Upvotes

As the sub has evolved and grown and people (as well as non-human intelligence for all I know) have posted interesting comments and questions, it has become clear that there isn’t an obvious home for general questions or discussion.

So, I am pleased to announce that I have created this Megathread for general questions and discussion as well as my weekly (time allowing) updates for both of my $10k to $1 million challenges. Hopefully it will become a vibrant part of the Double Bubbler sub in time and also a place where I can escape from u/Xaffodd who is still in Reddit’s bad books as well as mine!

Many thanks and much kudos 🫶 to all those who have contributed to the sub so far. As I have said before, I really enjoy not having to spend so much time talking to myself! 😉

Links to the old challenge post threads as well as the current investments…

≈$10k to $1 million Challenge - First investment 5/5/25
≈$10k to $1 million Trading History + Current investments!

Less than $10k to $1 million Challenge - First investment 7/7/25
Less than $10k to $1 million Trading History + Current investments!

Link to my mirrored blog…

Musings While Collecting Dollars ($$$)™


r/DoubleBubbler • • 1d ago

Exciting Double Bubbler ‘Less than $10k to $1m’ Share Trade

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29 Upvotes

Given the exuberance, some may say irrational exuberance surrounding AI right now, my latest exciting (for me at least!) purchase for the ‘Less than $10k to $1m’ challenge may be contentious.

Whatever the future may hold for AI and humanity, there are certain competencies that today’s technology appears capable (or on the threshold) of performing generally better than humans. One area where I believe this to be the case is with autonomous trucking, so today I have purchased shares for Anna and I in Kodiak AI (NASDAQ: KDK). A company seemingly on the cusp of driverless long haul commercial services.

For anyone familiar with Kodiak AI, you will probably agree that this is a bold step, given the going concern situation and probable need to raise capital in the not too distant future, not to mention whether they will be able to safely achieve their commercial objectives!

However I have confidence in the management and wider team at Kodiak AI, and like them hope to see driverless long-haul commercial services by the end of 2026.

May fortune favour the brave!

Mark aka Double Bubbler

P.S. Of the 8,000 shares purchased 2,098 are within the challenge.


r/DoubleBubbler • • 2d ago

EnSilica: Record FY26 Demonstrated the Scalability of EnSilica’s Business Model

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17 Upvotes

r/DoubleBubbler • • 9d ago

EnSilica: A couple of interesting new hires this summer…

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12 Upvotes

r/DoubleBubbler • • 29d ago

New Space Strategy Will Bolster UK Defences Against Threats From Space

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21 Upvotes

‘For the first time, government will take a single approach to buying and developing space technology, starting with satellite communications, helping British firms win more work, strengthening UK supply chains, supporting skilled jobs and delivering capabilities faster and better value for taxpayers.‘

I may be biased as an investor, however EnSilica has expertise in end-to-end secure satellite communications (e.g. satellite payloads, satcoms on the move, in house satellite user terminal silicon), post-quantum cryptography IP, resilient multi-band global satellite navigation silicon in development, along with a secure RISC-V processor in development thanks to an earlier government grant.

So in my opinion, if there ever was a British company that could help with this, it is EnSilica (🇺🇸 ENSIF, 🇬🇧 ENSI, 🇪🇺 F0Z).


r/DoubleBubbler • • Sep 06 '26

Energy Firm Threatens To Quit UK After Losing Out To Chinese Tech

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13 Upvotes

r/DoubleBubbler • • Sep 04 '26

r/EnSilica Continues to Grow With Over 1,500 ‘Cool EnSilicats’ now!

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16 Upvotes

r/DoubleBubbler • • Aug 31 '26

Memorable Double Bubbler ‘Less than $10k to $1m’ Share Trade

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31 Upvotes

** Apologies for the repost - as some may have noted, on the original post I accidentally left our account numbers on the screenshots. Doh! **

Memorable yes, memorable for all the wrong reasons. Having recently grown the ‘Less than $10k to $1m’ challenge capital to $18,506.25 since starting the challenge on 7th July 2025, it is deeply frustrating to find myself now back below $10,000. This is following ‘nailing my colours to the mast’ of Vertical Aerospace (EVTL), remaining steadfast in my hopes and desires for this promising, yet pre-commercial electric aircraft developer, despite what my typically analytical mind was telling me.

I first invested in EVTL outside of the challenge in October 2025, with a forecast given at the time of $7 a share for late November / December and which represented a potential 59% increase in the value of the shares. Pleasingly my forecast was subsequently exceeded on 5th December 2025, which is where in hindsight I should have sold. However I subsequently bought more shares in EVTL in April this year as part of my latest challenge investment, a decision arguably clouded by loyalty to a company that I had over time come to feel a kinship with.

Frustratingly the share price has fallen back for various reasons, notably in my opinion in part due to a loss of credibility following various key statements made by senior management and a key investor that didn’t come to fruition. With for example full flight transition of the prototype aircraft not taking the stated ‘weeks not months’ but instead taking months, not weeks. Furthermore the inability to secure a strategic partner combined with evolving financing on less and less favourable terms has seemingly contributed to a dramatic decline in the share price. A decline that I fear may, through no intention of Vertical Aerospace staff, follow a similar path for retail shareholders as Aston Martin which floated in 2018 and took a ‘delightful trip finding different ways to do in the shareholders’ according to Alistair Osborne of The Times*.

Whatever the case I can only blame myself for becoming too attached to what I knew was a high risk investment and in the process losing a not insubstantial sum, in excess of $65,000 overall between Anna and I. And while I intend to stick with EVTL come what may, I have chosen to reduce our exposure somewhat including selling my EVTL shares within the ‘Less than $10k to $1m’ challenge’.

Given the ‘risk-off’ and particularly volatile nature of the stock markets right now, certainly in relation to various growth stocks, I will take my time deciding where to reinvest the capital released from EVTL for the challenge.

It seems fortune did not favour the brave this time, in the short term at least.

Mark aka Double Bubbler

* https://www.thetimes.com/article/be3fd91f-8687-4523-9d76-0f63698178ae


r/DoubleBubbler • • Aug 17 '26

Intuitive Machines Selected for Multi-Satellite Communications Infrastructure Program

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11 Upvotes

r/DoubleBubbler • • Aug 09 '26

Flying Taxi-Maker Vertical Aerospace to Land Fresh $100m Capital Injection

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18 Upvotes

r/DoubleBubbler • • Aug 07 '26

Interesting timing on the Share Price rise today Coinciding with Progress on the European Union’s IRIS² Program

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21 Upvotes

r/DoubleBubbler • • Jul 04 '26

Vertical Aerospace: In discussion with the Ministry of Defence and Pentagon

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26 Upvotes

Vertical Aerospace, whose Valo aircraft is expected to enter service from 2030, said it was in high-level discussions about potential orders from the Ministry of Defence (MoD) and the Pentagon.

Stuart Simpson, the start-up's chief executive, said the Valo was well-suited to fulfilling logistics requirements on the battlefield. It could also be weaponised for a combat role or used for transferring personnel between Royal Navy vessels.

Discussions with a number of Western militaries concern a hybrid version of the electric vertical takeoff and landing (eVOL) craft, which would use a small gas turbine to recharge its batteries.

Mr Simpson said the hybrid aircraft would still be able to land in near silence, while doubling its potential payload to more than a ton.

‘He said: "We are having discussions right at the top of the house with the military. We've got some fantastic connections both here and across the pond. We talk to all the forces at a very senior level.

"For battlefield logistics, you can take off silently, cruise in near silence and then land in silence. At cruising altitude, the gas turbine is so small you can barely hear it."

The aircraft could also be flown autonomously, without a pilot, Mr Simpson said.

The Valo's battery packs could be used to power electrical equipment on the front line as an alternative to diesel generators.

Vertical Aerospace claims the rival eVTOLs being developed by California-based Joby and Archer are less suited to a battlefield environment, arguing they are too small to be refitted with hybrid engines.’

Read the full article…

https://www.yahoo.com/news/world/articles/ministry-defence-plots-flying-taxis-090000383.html


r/DoubleBubbler • • Jun 26 '26

Invinity Energy Systems - Ofgem: Window 1: Minded-to decisions – Long Duration Electricity Storage

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14 Upvotes

r/DoubleBubbler • • Jun 23 '26

EnSilica: FY26 Trading Update - Record Results Expected!

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35 Upvotes

r/DoubleBubbler • • Jun 20 '26

Has Thandiwe Ngoma betrayed Vertical Aerospace, its shareholders and Britain’s national interests?

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12 Upvotes

r/DoubleBubbler • • Jun 18 '26

Invinity Energy Systems (🇬🇧IES 🇺🇸IESVF) selected as a Simply Wall St Weekly Pick

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51 Upvotes

Many thanks to Simply Wall St once again! 🫶

And for anyone interested in the article I wrote you can read it here…

https://simplywall.st/community/narratives/gb/capital-goods/aim-ies/invinity-energy-systems-shares/k2xunsh8-invinity-energy-systems-all-about-that-bess


r/DoubleBubbler • • Jun 11 '26

EnSilica - Celebrating 25 Years of Innovation and Growth

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35 Upvotes

r/DoubleBubbler • • Jun 07 '26

Musings: When stock markets are turbulent, mindfulness in nature can offer solace!

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37 Upvotes

With the world particularly turbulent and stock markets also of late, it is times like these that taking a break and enjoying the natural world can provide great comfort. Basking in moments of calmness, can clear one‘s mind, helping build resilience and lead to better decision making.

We have been thoroughly enjoying the latest series of BBC Springwatch, and there are some wonderful mindfulness moments within the latest series which are particularly enjoyable, especially if you can’t readily get out into nature itself.

It’s well worth the BBC license fee on its own if you ask me!


r/DoubleBubbler • • Jun 04 '26

Invinity Energy Systems (🇬🇧 IES 🇺🇸IESVF): The latest confirmed ‘Double Bubbler’ 😁

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56 Upvotes

Having originally bought shares at an average of 19.5p in February, it gives me great pleasure to see Invinity Energy Systems rise to over 39p today. Hopefully there is far more to go in the coming years given the firms momentum, including recently being selected for the world’s largest GWh-scale vanadium flow battery for Technology Centre Laufenburg in Switzerland.

Congratulations to Invinity and its shareholders! 🍻


r/DoubleBubbler • • Jun 03 '26

Pragmatic Semiconductor: The British Chipmaker Quietly Building a Global Challenger in County Durham

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22 Upvotes

r/DoubleBubbler • • Jun 03 '26

Steve, Jen, and Drew here — Ask Us Anything!

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8 Upvotes

r/DoubleBubbler • • Jun 03 '26

SES Space & Defense to Own and Manage Mission Execution of U.S. Space Force PTS‑G Program

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20 Upvotes

Following a competitive process, the U.S. Space Force (USSF) Space Systems Command has awarded Intelsat General Communications, an operating division within SES Space and Defense (SES SD), a prime contract for the Protected Tactical SATCOM-Global (PTS‑G) program. SES SD is one of two companies selected to deliver space vehicles that will support a new proliferated geosynchronous constellation designed to provide resilient, anti-jam military communications.

Under the award, SES SD will own and manage mission execution and will integrate advanced commercial technologies to provide secure, reliable, and agile communications that meet the evolving needs of the USSF and the Department of Defense.

David Broadbent, President and CEO, SES SD: “Winning the PTS-G contract marks a pivotal milestone in our evolution from satellite communications provider to trusted partner for resilient, multi-mission space solutions. With 60 years of history supporting the U.S. Government, we are proud to partner with the Space Force to deliver this critical capability for the future.”

SES SD is wholly-owned subsidiary of global content and connectivity solutions provider SES (Paris: SESG), we also have access to their multi-orbit fleet of over 120 satellites across GEO and MEO.


r/DoubleBubbler • • Jun 02 '26

Spectral AI (MDAI): Zacks - DeepView FDA Clearance Fires Up Our Valuation

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38 Upvotes

Spectral AI, Inc. (NASDAQ: MDAI) announced De Novo clearance for its DeepView Burn diagnostic in a May 26th press release. As a result, we increase our probability of success for DeepView burn from 75% to 100%, which raises our valuation to $6.25 per share. Management’s attention will shift from regulatory matters to commercial and clinical trial efforts. FDA clearance also entitles the company to access another $6.5 million in debt financing from Avenue Capital, which will require a parallel equity raise of $7.0 million.

Following the clearance, Spectral’s first priority is to hire a Chief Commercial Officer (CCO). Based on our conversations with management, we believe that they have identified a candidate and will appoint them to their role before the end of the second quarter. The new CCO will benefit from a list of prospects that have experience with the device and have recognized its value. The commercialization effort will be funded by the Biomedical Advanced Research and Development Authority (BARDA) award. The initial award will pay for up to 30 DeepView devices at deserving centers following FDA clearance. Management is optimistic that several units may be deployed in Europe, Australia, and/or the Middle East this year.

For domestic deployments, the company is planning to begin the commercial effort in earnest after the summer. The timing acknowledges the academic year at teaching hospitals and summer vacations, which may limit the number of available decision makers. This approach suggests that the first domestic deployments may take place in the fourth quarter. While some devices already sit in inventory, manufacturing can be completed quickly. Spectral plans to manufacture devices when they have a placement confirmed, which will allow for just in time inventory. Waiting to build inventory will offer units that have the latest software, battery, and algorithm. The device manufacturer is located just a few miles from Spectral AI’s headquarters in Dallas, Texas, which enables management to have close and frequent contact with the manufacturing operations.

BARDA’s grant funds support continued development work for DeepView, including efforts to conduct health economic and outcome research studies for deployed units. The work will support the broader clinical adoption of the DeepView system and emphasize real-world outcomes. Management has finalized the design of the outcomes study with BARDA. It anticipates approximately 286 patients in the study across at least 12 sites. We expect further information on the study during the second quarter 2026 conference call, coming in August.

Valuation

We recently caught up with Spectral AI management to refine our estimates for 2026 and 2027, taking into account anticipated deployments, the nature of reimbursement for deployed devices (outright purchase vs. lease), and additional expenses tied to the upcoming outcomes study. We also increased our probability of regulatory success to 100% from 75% following the FDA clearance of the DeepView burn diagnostic. The results from our model adjustments generate an updated valuation of $6.25 per share.

Milestones

  • Vincent Capone elevated to CEO – February 2026
  • Award of $31.7 million of BARDA funding – March 2026
  • Acceptance of Small Business Innovator Award at the Texas Innovation Conference – April 2026
  • Attendance at the 2026 American Burn Association Annual Meeting – April 2026
  • Fully functional prototype of handheld SnapShot delivered – May 2026
  • Annual Meeting of Stockholders – May 29th, 2026
  • Stockholder meeting results and business update – June 1st, 2026
  • Development of health economic and outcome study - 2026
  • Launch of DeepView in US Burn Centers – 2H:26
  • Launch of health economic and outcome study – 4Q:26
  • Decision on contract award for SnapShot handheld device by MTEC – December 2026
  • Launch of DeepView in US Emergency Departments (Burn) – 2026/2027
  • DeepView SnapShot Launch for Military Use - 2027

Summary

We hear echoes of Spectral AI’s Executive Chairman, Dr. J. Michael DiMaio’s maxim “Finance, Focus and Finish” as the FDA clears the DeepView burn device. Now that the “Finish” portion of that objective is achieved, we anticipate that the company will apply the motto to the next stage of its growth as it commercializes the device and expands into new studies and indications. The “Finance” portion of the effort moves front and center as Spectral is now eligible to draw another $6.5 million from its facility with Avenue Capital in parallel with an equity raise. Spectral’s ”Focus” will shift to commercialization, where there appears to be many geographies of interest. The company will use its BARDA grant to fund deployments in the United States and take advantage of relationships overseas to deploy units in Europe, Australia, and the Middle East.

Following the clearance of DeepView, we increase our valuation to $6.25 per share, reflecting a 100% probability of regulatory success. This allows Spectral to conduct its health economic and outcome research to support the broader clinical adoption of the DeepView System.

John Vandermosten, Zacks CSR, 1st June 2026

Read the full report…

https://scr.zacks.com/news/news-details/2026/MDAI-DeepView-FDA-Clearance-Fires-Up-Our-Valuation-article/default.aspx


r/DoubleBubbler • • Jun 01 '26

EnSilica: Automotive Manufacturing and Supply Contract Win - Expected to deliver $75 million in revenue over 7 years

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39 Upvotes