Reaktor's IPO attracted far more demand than available shares, prompting the company to close its public offering early. According to Kauppalehti, the retail tranche was multiple times oversubscribed, underscoring investor appetite for one of Finland's most closely watched technology listings in recent years.

The response validates a story Reaktor began telling when it unveiled its listing plans in May. As Listeds reported at the time, the company is positioning itself as more than a traditional IT consultancy, highlighting growth opportunities in AI, defense software, and international expansion. The IPO is expected to raise roughly €20 million in new capital to support those ambitions.

Investor demand was helped by strong institutional backing. Anchor investors including Ilmarinen, Mariatorp, the Herlin family's investment company, WIP Asset Management, and funds managed by Danske Bank, Aktia, and SP committed around €45 million before the offering closed.

The IPO is also creating a new group of Reaktor millionaires. Existing shareholders are selling shares worth a combined €34.6 million, according to Kauppalehti. Among the biggest beneficiaries are founders and major shareholders including Hannu Terävä. Chief Executive Pekka Horo is selling less than €1 million worth of shares but will retain shares valued at more than €2.5 million. Most founders will remain significant shareholders after the listing.