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Search›Companies›OÜ WATER SYSTEMS
10849593ActivePrivate limited company

OÜ WATER SYSTEMS

Tartu maakond, Tartu linn, Tartu linn, Ringtee tn 37·EMTAK 36001 — Water collection, treatment and supply·24+ years
Andmed · ···
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Overview

e-Business Register · 8 h ago
Registry code
e-Business Register
Legal form
Private limited company
Registered
11.02.2002e-Business Register
Address
Ringtee tn 37, Tartu linn, Tartu linn, 51013 Tartu maakondADS · e-Business Register
E-mail address
mihkel@miridon.eee-Business Register
Telephone
+372 7362633· Telia Eesti ASe-Business Register · TTJA NBA
Principal activity
EMTAK 36001 - Water collection, treatment and supplye-Business Register · ETCB
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
  • Recent registrations

Data

  • 72 sources
  • Database
  • Extensions
  • MCP

Organisation

  • About
  • For journalists
  • Donation terms
  • Refunds
  • Terms
  • Privacy
  • Contact
© 2026 Nimistu MTÜ. License CC-BY-SA 4.0 · details
Revenue
0 €
▼ NaN% vs 2023
Employees
–
2024 annual report
Taxes paid
–
Tax debt
0 €
As of 25.06.2026 (MTA)

Registered 11. veebruar 2002, primary activity: Water collection, treatment and supply. Main place of business in Tartu linn, Tartu linn, Tartu maakond.

Data · 6 sourcese-Business Register · 3 min ago
e-Business Register ↗
Revenue
0 €
▼ NaN% vs 2023
Employees
–
2024 annual report
Taxes paid
–
Tax debt
€0
As of 25.06.2026 (MTA)

Officers

e-Business Register · 8 h ago
MK
Mihkel Klaassen
Born 1976 · 50 y · board member since 11.02.2002
Board member

Founders (2)

e-Business Register · 8 h ago
RR
Riina Roosalu
Born 1965 · 61 y · founder since 11.02.2002
Founder
MK
Mihkel Klaassen
Born 1976 · 50 y · founder since 11.02.2002
Founder

Shareholders (2)

e-Business Register · 8 h ago
OM
osaühing MiridonLEGAL PERSON
Legal person · 10288255 · shareholder since 01.09.2023
Shareholder 67%
MK
Mihkel Klaassen
Born 1976 · 50 y · shareholder since 01.09.2023
Shareholder 33%

Beneficial owners (2)

e-Business Register · 8 h ago
MK
Märt Klaassen
Born 1981 · 45 y · ultimate beneficial owner since 30.10.2018
Ultimate beneficial owner
MK
Mihkel Klaassen
Born 1976 · 50 y · ultimate beneficial owner since 30.10.2018
Ultimate beneficial owner

Annual reports (6)

e-Business Register · annual reports · 5 päeva tagasi
Revenue 2024
0 €
Employees 2024
0
YearRevenueProfitEquityAssetsEmployees
2024

Tech stack

Tehnoloogiad
Mobile carrier
+372 7362633Telia Eesti AS

History

last 2 years · MTA + ÄR + MTR + Procurements
2025
11.07.2025ReportEsitati 2024. aasta aruanne— Käive 0 €
2024
22.07.2024ReportEsitati 2023. aasta aruanne— Käive 0 €
06.07.2024FilingHoiatusmäärus registrist kustutamiseks: majandusaasta aruanne esitamata— Ä 20022503 / M4 · Olek: Puudused kõrvaldatud

Connected companies

Same-person ties · e-Business Register

OÜ WATER SYSTEMS is connected to 17 other companies through 3 people who hold a role here and elsewhere. The strongest tie runs through Mihkel Klaassen (9 companies).

Total connections
17
via 3 people
Connecting people
3
Active here
Distinct roles
4
Board member · Founder
Strongest tie
Mihkel
9 companies
Via personMihkel Klaassen
0 €
0 €
16k €
16k €
0
11.07.2025
20230 €0 €16k €16k €022.07.2024
20220 €0 €16k €16k €020.09.2023
20210 €0 €16k €16k €028.08.2023
20200 €0 €16k €16k €011.04.2022
20190 €0 €16k €16k €013.05.2021
Original files in PDF – the full register on e-Business Register.View reports on e-Business Register
9
Märt Klaassen6
Riina Roosalu2
MK
Mihkel Klaassen
board member, founder, shareholder 33%, ultimate beneficial owner
9 other companies›
CompanyRoleReg. code
Busekvasek M OÜ
Ultimate beneficial owner
12922845
Metering Services OÜ
Ultimate beneficial owner
16774838
OSAÜHING ESTPET
Board memberFounderShareholder 100%Ultimate beneficial owner
10695836
osaühing Miridon
Board memberFounderUltimate beneficial ownerShareholder 41%
10288255
Rehe Varad Energia OÜ
Board member
14826873
Rehe Varad OÜ
Ultimate beneficial ownerBoard member
14238768
Rehe Varad Projekt OÜ
Board member
14824408
Rehe Varad Vesi OÜ
Board member
14826896
Tallinn, Nuia tn 16 korteriühistu
Board member
80579729
MK
Märt Klaassen
ultimate beneficial owner
6 other companies›
CompanyRoleReg. code
MS Varad OÜ
Shareholder 100%Board memberFounderUltimate beneficial owner
14758077
osaühing Miridon
Board member
RR
Riina Roosalu
founder
2 other companies›
CompanyRoleReg. code
osaühing Miridon
Founder
10288255
SEGASUMMA SUVILA
Ultimate beneficial ownerBoard member
80005572
Ultimate beneficial owner
10288255
Rehe Varad Energia OÜ
Board member
14826873
Rehe Varad OÜ
FounderUltimate beneficial ownerBoard member
14238768
Rehe Varad Projekt OÜ
Board member
14824408
Rehe Varad Vesi OÜ
Board member
14826896