Helsinki – September 19, 2026 -- Finland's Financial Supervisory Authority approved a supplement to UPM-Kymmene Corporation's demerger and listing prospectus on September 18, 2026, formalizing Lasse von Hertzen's appointment as permanent Chief Financial Officer of WISA Group Plc, the entity being spun off from UPM.
Finnish regulator clears prospectus supplement for UPM's WISA spin-off
The approved supplement amends the Finnish-language demerger and listing prospectus tied to UPM's partial demerger, which is scheduled for completion on October 31, 2026. Trading in WISA shares on the regulated market of Nasdaq Helsinki Ltd is expected to begin on November 2, 2026, or as soon as reasonably possible thereafter. UPM is publishing the supplement on WISA's behalf, alongside unofficial English translations available via UPM's demerger information channels.
Von Hertzen moves from interim to permanent CFO role
Von Hertzen, who had served as WISA's interim CFO, was confirmed by UPM's Board of Directors as Senior Vice President, CFO, and a member of WISA's Group Leadership Team. The supplement also incorporates unspecified technical amendments to the original prospectus.
WISA's seven-member leadership team set ahead of November listing
With the CFO appointment finalized, WISA's Group Leadership Team now comprises seven executives: Tuija Suur-Hamari as President and CEO, Pia Helminen as SVP HR, Saara-Maria Helminen as SVP and General Counsel, Lasse von Hertzen as SVP and CFO, Kristiina Jaaranen as SVP Marketing, Sustainability and Communications, Susanna Rinne as SVP Sales, and Juhani Tenhunen as SVP Operations. This lineup was first outlined on July 16, 2026, when UPM published the original demerger and listing prospectus.
All appointed executives will remain in their current UPM roles until the Demerger closes, at which point their WISA appointments take effect.