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Search›Persons›Mats Viisileht
MV
Born 04.01.1990 · 36 y

Mats Viisileht

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Estonia's public business register
HomeViewsIndustriesBlogSourcesAbout

Public registry of Estonian companies — every fact traceable to a source and a date. Free and ad-free for everyone.

Nimistu MTÜ
Address: Parda tn 8, 10151 Tallinn, Estonia
E-mail: info@nimistu.ee

Browse

  • Home
  • Views
  • Industries
  • Activity licences
  • Recent registrations

Data

  • 79 sources
  • Database
  • Extensions
  • MCP

Organisation

  • About
  • FAQ
  • For journalists
  • Donate
  • Donation terms
  • Refunds
  • Terms
  • Privacy
  • Contact
© 2026 Nimistu MTÜ. License CC-BY-SA 4.0 · details
4active companies2years active
Board member
4
companies
Shareholder
1
companies
Founder
1
companies
Top role
MAVI OÜ
Shareholder + Board member + Founder
since 19.02.2024 · 2 y
Latest activity
O3 Energy OÜ
Board member
since 05.05.2025

Career timeline

e-Business Register
202420252026MAVI OÜO3 Energy OÜO3 Inseneribüroo OÜO3 Technology OÜosanikjuhatuse_liigeasutajajuhatuse_liigejuhatuse_liigejuhatuse_liige
Board memberFounderShareholderSupervisory board
  • MAVI OÜ – osanik (2024-02-20 – now), juhatuse_liige (2024-02-20 – now), asutaja (2024-02-19 – now)
  • O3 Energy OÜ – juhatuse_liige (2025-05-05 – now)
  • O3 Inseneribüroo OÜ – juhatuse_liige (2025-05-05 – now)

History

e-Business Register · last 2 years
2025
05.05.2025OfficerAstus juhatusse2×expand ›hide ⌃
  • O3 Inseneribüroo OÜ · O3 Inseneribüroo OÜ
  • O3 Energy OÜ · O3 Energy OÜ

Activity overview

e-Business Register
Roles by type
Board member4
Founder1
Shareholder1
Companies by sector
Professional, scientific and technical activities4

Companies (4)

e-Business Register
OT
O3 Technology OÜ14062364Active
Kristiine linnaosa, Tallinn, Harju maakond·EMTAK 71121
Board member · 24.04.2024
2y
active
1,5m €
OI
O3 Inseneribüroo OÜ12321790Active
Kuressaare linn, Saaremaa vald, Saare maakond·
  • O3 Technology OÜ – juhatuse_liige (2024-04-24 – now)
    • EMTAK 71121
    Board member · 05.05.2025
    1y
    active
    665k €
    MO
    MAVI OÜ16925384Active
    Põhja-Tallinna linnaosa, Tallinn, Harju maakond·EMTAK 7112
    Shareholder 100% · 20.02.2024Board member · 20.02.2024Founder · 19.02.2024
    2y
    active
    39k €
    OE
    O3 Energy OÜ14291372Active
    Kristiine linnaosa, Tallinn, Harju maakond·EMTAK 71121
    Board member · 05.05.2025
    1y
    active
    3k €