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Single Family OfficePuts its own capital into companiesActive · deal in last 18 monthsLAST VERIFIED Oct 2026 · 3 SOURCES

Ensto Invest Oy

Also known as Ensto Invest

Helsinki family office of the Miettinen family and owner of Ensto Oy; also a listed-equity investor (10.13% of Enersense International, May 2026).

USEFUL FOR Co-investors

Family & background

FAMILY
Miettinen
WEALTH ORIGIN
Ensto, electrical technology company founded by Ensio Miettinen in 1958
HEADQUARTERS
Helsinki, Finland
FOUNDED
2017

Investment approach

SECTORS
Industrial & ManufacturingClimate & Energy
ROUTES
Companies (own capital)
LATEST DEAL
Enersense International Oyj (Listed stake increase (above 10%)) · May 2026

Overview

Ensto Invest Oy is the family office of the Miettinen family and the owner of Ensto Oy, the electrical technology company founded by Ensio Miettinen in 1958, according to Ensto's own owners page. Its CEO since 2021 is Tero Luoma, and Samuel Raitavuo has chaired its board since 2025. In May 2026 it disclosed that its stake in the listed Enersense International had risen above 10%.

Holdings & investments (2)

  • Ensto Oy
    Industrial & Manufacturing
  • Enersense International Oyj
    Climate & Energy

People

  • Marko Aarttila
    CFO, Ensto Group & Ensto Invest Oy Group · source
  • Tero Luoma
    CEO (since 2021) · source
  • Samuel Raitavuo
    Chair of the Board (since 2025) · source
  • Marjo Miettinen
    Board Member · source
  • Iida Miettinen
    Board Member · source

Frequently asked questions

Ensto Invest Oy is a single family office based in Helsinki, Finland, founded in 2017.

Ensto Invest Oy invests on behalf of the Miettinen family (Ensto, electrical technology company founded by Ensio Miettinen in 1958).

Ensto Invest Oy invests its own capital into companies.

Ensto Invest Oy invests in Industrial & Manufacturing and Climate & Energy.

Key people at Ensto Invest Oy include Tero Luoma (CEO (since 2021)), Samuel Raitavuo (Chair of the Board (since 2025)), Marjo Miettinen (Board Member) and Iida Miettinen (Board Member).

Ensto Invest Oy's holdings and investments include Ensto Oy and Enersense International Oyj.

The most recent publicly reported investment by Ensto Invest Oy is Enersense International Oyj (Listed stake increase (above 10%)), announced in May 2026.