By Zaven Boyrazian, CFA
Publication Date: 2026-06-06 06:11:00
Penny stocks have a reputation for being wild, speculative bets. And to be fair, that reputation is often deserved. But this corner of the market is also home to many hidden gems where a small slice of capital can unlock explosive returns.
That’s certainly proven to be true in 2026. Most investors are still fixated on AI darlings like Nvidia. And with the tech giant up a further 11.8% since the start of the year, people are making money. But compare that to the 278.3% gain of Hardide (LSE:HDD) shares, and it’s the smart investors not following the crowd who are making even more.
Just to put this into money terms, a £1,000 investment in Nvidia at the start of 2026 is now worth, £1,118. The same investment in Hardide’s worth closer to £3,783.
So why is this penny stock skyrocketing? And is it too late to buy?
What does Hardide actually do?
Hardide’s not some flashy AI name. It’s a specialist in advanced tungsten carbide coatings that protect metal components from extreme wear, erosion and corrosion in brutal environments.
By using its patented chemical vapour deposition (CVD) coatings, the company extends the life of high-value parts and components used in industries such as energy, aerospace, power generation, flow control and precision engineering.
In simple terms, Hardide helps heavy-duty equipment last longer and perform better, reducing downtime and ultimately saving its European and North American…
