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Valmet's Sampo Immonen joins Spinnova as CTO as sustainable fiber pioneer splits technology leadership

Aug 3, 2026

Sampo Immonen, head of research and development for Valmet's paper and board machines business, will join Spinnova Plc as chief technology officer no later than Oct. 1, 2026, as the Finnish textile-fiber company reshapes its technology leadership while working to restart production and prepare for industrial-scale manufacturing following a difficult 2025.

Immonen will join the management team and report to CEO Janne Poranen, while longtime CTO Juha Salmela moves into the newly created role of chief technology strategy and innovation officer, remaining on the management team, the sustainable fiber pioneer announced recently. The new roles divide responsibility between industrial-scale operations and future technology development.

Founded in 2009, Spinnova develops patented technology for producing textile fiber from wood pulp and waste materials without harmful chemicals or dissolving. The technology originated from research by Juha Salmela at VTT inspired by the way spiders spin silk. The company has already collaborated with brands including The North Face, Puma, Bestseller, H&M Group, Adidas, Ecco and Marimekko. 

Spinnova has been reshaping its leadership throughout 2026 while advancing its production restart plans. Immonen's appointment follows Chief Commercial Officer Mikko Lassila's arrival in April and comes less than two weeks after the company announced Chief Product and Sustainability Officer Shahriare Mahmood would leave in October after five years on the management team, as reported by Listeds earlier.

CEO Janne Poranen said Immonen will help support the company's industrial-scale ambitions. "Sampo is an excellent addition to our team and will play an important role in the company's development and in scaling our technology to industrial scale." 

Immonen joins after more than 14 years at Valmet, where he held a series of technology and R&D leadership roles, most recently heading R&D for the paper and board machines business. His experience spans technology portfolio management, strategic partnerships, piloting and new business development. He said his fiber-industry experience and professional network would help create value for Spinnova and support the company's next stage of development.

Technology leadership split reflects changing responsibilities

The new structure separates responsibility for operating Spinnova's current technology from developing its future technology platform. As CTO, Immonen will oversee industrial-scale technology operations, while Salmela—whose research formed the basis of Spinnova's fiber technology—will concentrate on future technologies, intellectual property and strategic opportunities.

The appointment is the third management team change Spinnova has disclosed this year. As of Oct. 1, the management team will comprise CEO Janne Poranen, CFO and People Officer Santeri Heinonen, CTO Sampo Immonen, CMO Mikko Lassila, Chief Product and Sustainability Officer Shahriare Mahmood until Oct. 20, CTSIO Juha Salmela and General Counsel Johanna Valkama. Mahmood's departure leaves the product and sustainability portfolio without a long-term leader.

The management changes come after a challenging 2025, when Spinnova’s revenue declined almost 55% to EUR 344,000, and operating loss more than doubled to EUR 41.3 million, partly because of an EUR 18.4 million impairment related to the Woodspin joint venture. Since then, Spinnova has focused on preparing to restart production at the Woodspin demonstration facility in Jyväskylä while broadening the commercial network supporting its fiber technology. 

Unlike the management team, the board has remained largely unchanged. At the April 2026 AGM, shareholders re-elected the board and authorized a share issuance. More recently, Pirkka Palomäki replaced Ilkka Kivimäki on the shareholders' nomination board, the body responsible for proposing future board candidates, ahead of the 2027 AGM cycle. 

What Spinnova is trying to accomplish

Spinnova's recent announcements point to several parallel priorities. The company is working to restart production at the Woodspin demonstration facility after trial runs began earlier this year. It is also seeking to improve production economics by lowering energy consumption, reducing recipe additive costs, and developing new fiber-finishing and drying concepts. The revised technology leadership structure supports those priorities.

Commercially, Spinnova continues to broaden the ecosystem supporting its proprietary Spinnova® fiber. The company has added recycling partner Circulose to accelerate technology scale-up, confirmed textile conglomerate NZ TEX Group's support for scaling the fiber, and continued brand collaborations with companies including Ecco, Jack & Jones and Insider. The company will also need to decide how product and sustainability responsibilities are handled after Mahmood's departure in October.

Investor watchpoints

Investors will be watching how the revised technology leadership supports the company's industrial-scale ambitions as production preparations continue at Woodspin. 

Attention will also turn to the rescheduled Half-Year 2026 report on Aug. 31, which will provide the first financial update since the recent management changes. Immonen's planned arrival by Oct. 1 and Mahmood's departure on Oct. 20 are the next milestones as Spinnova works toward restarting production.

Leaders

Spinnova's product chief exits as Finnish sustainable fiber pioneer works toward 2026 production restart

Jul 24, 2026

After five years on Spinnova's management team, Shahriare Mahmood will leave his role as chief product and sustainability officer, as the textile technology company works to restart fiber production during 2026 following a challenging year and a series of leadership changes.

Mahmood will remain in the role until October 2026, and Spinnova has not named a successor, according to the recent press release. The departure follows several management team changes at the textile innovation company over the past 16 months, including a founder returning to lead as the CEO.

CEO Janne Poranen thanked Mahmood for his work. "I would like to thank Shahriare for his contribution to Spinnova's development. Shahriare has played an important role in advancing our product and sustainability work, and we wish him all the best for the future."

Inspired by an idea from VTT researcher Juha Salmela on how spiders spin silk, Spinnova has developed patented technology to produce textile fiber from wood pulp and waste materials without harmful chemicals or dissolving. Founded in 2009, the Finnish company has already made inroads into commercializing its biodegradable fiber with brands including The North Face, Puma, Bestseller, H&M Group, Adidas, Ecco and Marimekko.

Leadership changes continue

Mahmood's departure follows a difficult 2025 for Spinnova. Revenue fell almost 55% to EUR 344,000 from a year earlier, while the operating loss more than doubled to EUR 41.3 million, partly due to an impairment of EUR 18.4 million on the company's stake in the Woodspin joint venture, which operates Spinnova's main commercial-scale production site. The company proposed no dividend for 2025 and is not providing financial guidance for 2026. 

The product chief’s departure extends a period of high management turnover. Former CEO Tuomas Oijala stepped down in 2025, with founder Janne Poranen returning as CEO. Lasse Holopainen and Ben Selby also left the Management Team, while Mikko Lassila joined as chief commercial officer by April 15, 2026.

At the April 2026 AGM, shareholders re-elected all seven board members. Poranen continued as both CEO and chair, with the company citing its stage of development for departing from the Finnish Corporate Governance Code's recommendation to separate the roles. Shareholders also authorized the board to issue up to 5.2 million new shares, or about 10% of those outstanding, through June 30, 2027.

What Spinnova is trying to accomplish

Spinnova's immediate priority is restarting production at the Woodspin demonstration facility in Jyväskylä, which produces SPINNOVA® fiber. The plant was suspended after high production and investment costs delayed commercialization, and trial runs began in April to validate process improvements at a larger scale. The company's goal is to resume production during 2026 if the trials are successful.

Spinnova says it has reduced energy consumption in its microfibrillated cellulose manufacturing process by more than 50% compared with the previous Woodspin factory concept and lowered recipe additive costs by about one-fifth. It is also developing new fiber-finishing and drying concepts aimed at improving fiber quality while reducing production and investment costs.

Alongside the technology work, Spinnova is building an international consortium to support commercialization. During 2025, German sustainable fashion brand Armedangels, Tommy Hilfiger and Amsterdam-based Fashion for Good—a global platform that connects fashion brands with sustainability innovators—joined the initiative, although management said the partnerships are not yet notably reflected in revenue.

Investor watchpoints

The next leadership milestone is whether Spinnova appoints a successor to Shahriare Mahmood before his notice period ends in October, providing clarity on who will lead product development and sustainability through the next phase.

Investors will also be looking for evidence that the Woodspin trial runs support a return to production and that the company's expanding consortium begins contributing to commercial traction.

The company's half-year report on Aug. 25, 2026, is expected to provide the next update on leadership changes, production progress and commercial developments.

Leaders

When the direction changes: Tuija Kalpala on Betolar’s pivot and the reality of commercializing innovation

Jun 1, 2026

True innovation culture reveals itself when conditions are toughest. In this interview, Tuija Kalpala shares how a changing market forced Betolar to question its original path, and how that process unlocked a far more powerful vision. What began as a response to external pressure became a strategic turning point: a reminder that breakthroughs often emerge not from perfect plans, but from the courage to rethink them. This is a story of resilience, scientific curiosity, and leadership that chooses progress over comfort at Betolar.

In theory, strategy is deliberate. In practice, it often emerges through reaction — what Henry Mintzberg famously described as “a pattern in a stream of decisions.”

For large industrial groups, strategic change tends to take the form of divestments, spin-offs, or portfolio pruning. Business units are sold, split, or shut down when markets turn or returns disappoint. For smaller listed growth companies, the reality is starker: when the market no longer pulls as expected, every assumption must be re-examined.

That moment arrived for Betolar.

Founded on the promise of replacing cement with industrial sidestreams, Betolar entered the market at a time when sustainability was not just fashionable but funded. Two years later, the environment had changed radically. Interest rates rose. Construction activity collapsed, particularly in Finland, and parts of Europe, and the willingness to pay a premium for green solutions diminished sharply. 

“The interest is still there,” says Tuija Kalpala, CEO of Betolar.  “But the ability to commit to low-carbon projects, especially on the private side, has weakened significantly.”

In other words: demand in principle, but not in practice.

When construction hits the brakes

Construction markets are inherently cyclical, yet the current downturn has been unusually severe. 

Finnish listed construction companies such as YIT and SRV have repeatedly reported constrained housing demand. Analysts and economists broadly share this view, pointing to a lack of new projects, tight financing conditions, and persistently weak visibility. According to the Finnish Ministry of Finance, while a gradual recovery is expected over 2025–26, the pace is likely to remain slow, and uncertainty persists as to when private construction activity will regain momentum.

For Betolar, whose original business relied on replacing cement with low carbon alternatives in concrete applications, this posed a fundamental challenge. Even more problematic was a parallel shift in raw material markets.

The company had built its early technology on widely used industrial sidestreams such as blast furnace slag, a recognized and standardized substitute for cement. When Betolar was founded, slag was cheap and plentiful. During the pandemic-era green boom, that changed.

Large global cement players locked in long-term supply contracts. Prices rose sharply, in some cases approaching the price of cement itself. At the same time, the slag market became tight and many customers complained about the availability of slag. 

“The world changed on us from two directions at once,” Kalpala notes. “The construction market weakened with the demand for low-carbon solutions, and the availability and economics of sidestreams changed dramatically.”

Turning over every stone

For a small growth company, such conditions allow little margin for gradual course correction. Strategy must be questioned more often than in large corporations, and usually with far fewer buffers.

The question Betolar faced was blunt: what happens to growth when the market it was built for disappears?

The answer did not emerge from the boardroom, but from experimental work.

In the company’s laboratory in Kannonkoski, researchers were testing alternative industrial residues — materials that the cement industry had largely ignored due to high metal content. The original objective was simply purification: could these underutilized slags be cleaned enough to function as binders?

Almost accidentally, the team discovered something else.

“We realized we could remove the metals entirely including the strategic and critical metals,” Kalpala explains. “Not partially — but 99%.”

This was not a pre-defined target. It was an unexpected technological breakthrough in metal extraction.

From cement substitute to metallurgical platform

What emerged was a fundamentally different value proposition: a metallurgical separation technology capable of extracting valuable metals from industrial residues and producing a cement-like green binder as a by-product.

The implications were profound.

Betolar has since filed ten patents related to the technology and validated the process with universities and research institutions. External testing has confirmed the results. 

“This is not just about construction anymore,” Kalpala says. “This is about unlocking value from materials that are currently considered as waste.”

The company’s first commercial project reflects that shift. Betolar is working with global mining company Anglo American on the Sakatti mining project in Sodankylä, testing how future tailings could be processed using Betolar’s method. The goal is twofold: recover remaining metals from tailings and produce a green binder that could replace cement entirely within mining operations.

The ambition is nothing less than cement-free mines.

The long road to commercialisation

For all the technological promise, Kalpala is pragmatic about the realities of commercialization.

“Innovation takes time. Much more time than people expect,” she says. “Nothing happens overnight, especially when you are selling new technology.”

The immediate priorities are not scale, but credibility: raising the technology readiness level, building a proof-of-concept facility, and enabling in-house pilot-scale processing. This allows Betolar to test more materials, refine the process, and sell the technology globally. 

It is a patient strategy, and a necessary one.

Lessons for companies facing a pivot

Betolar’s experience offers broader lessons for listed growth companies navigating structural change.

First, strategic pivots require openness. “You cannot be emotionally attached to the original plan,” Kalpala says. “You have to be willing to turn every stone.”

Second, experimentation must be embraced. Betolar launched five new products to market in 2025, not because they are all guaranteed successes, but because learning also happens through testing and selling.

Third, sales skills and marketing matter, especially in Finland.

“There is still a belief that good technology sells itself,” Kalpala notes. “It doesn’t. First you need to understand the customer needs and then have targeted marketing, presence at conferences, and the courage to speak about what you’re building.”

Betolar has invested in focused social media, industry visibility, and partnerships. Collaboration with stainless steel giant Outokumpu has been particularly valuable. For a small company, references are hard to secure, especially in industries that are mainly dominated by giants.

Being listed on First North has helped. “It brings a certain level of trust, and it has opened some doors,” Kalpala says. 

Can it become a billion-euro business?

She believes it can, though not overnight, and not without execution risk.

“The market potential is significant,” Kalpala emphasises. “For example, mine tailings represent one of the world’s largest waste challenges. When combined with opportunities in mining, metallurgy, and industrial sidestreams, we are looking at industries measured in the hundreds of billions of euros globally.”

“At the same time, we are advancing our technology and continuing to increase its technology readiness level. Importantly, we are already seeing clear traction. Our collaboration with Anglo American in the Sakatti project is a good example of how our solutions are gaining real industrial interest.”

The pivot is still underway, and customer adoption and the scaling of commercial operations remain critical. 

However, the direction is clear, and Kalpala remains optimistic about the long-term opportunity.

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