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Search›Companies›Siena Holding OÜ
12658992ActivePrivate limited company

Siena Holding OÜ

Harju maakond, Tallinn, Kesklinna linnaosa, Tartu mnt 2·EMTAK 64201 — Valdusfirmade tegevus·12+ years
Andmed · ···
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Overview

e-Business Register · 11 h ago
Registry code
e-Business Register
Legal form
Private limited company
Registered
09.05.2014e-Business Register
Address
Tartu mnt 2, Kesklinna linnaosa, Tallinn, 10145 Harju maakondADS · e-Business Register
E-mail address
holding@siena.eee-Business Register
Telephone
+372 6800401· Elisa Eesti ASe-Business Register · TTJA NBA
Principal activity
EMTAK 64201 - Valdusfirmade tegevuse-Business Register · ETCB
Share capital
3000,00 €e-Business Register
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

  • 78 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
Revenue
–
As of 10.10.2026 (MTA)
Employees
–
2026 (MTA)
Taxes paid
2 €
State + labour taxes · 2026 I kv
Tax debt
0 €
As of 08.11.2026 (MTA)

Registered 9. mai 2014, primary activity: Valdusfirmade tegevus. Main place of business in Kesklinna linnaosa, Tallinn, Harju maakond.

Data · 6 sourcese-Business Register · 6 min agoMTA
e-Business Register ↗
Revenue 2026
–
As of 10.10.2026 (MTA)
Employees
–
2026 (MTA)
Taxes paid
2 €
State + labour taxes · 2026 (I kv)
Tax debt
€0
As of 08.11.2026 (MTA)

Officers (2)

e-Business Register · 11 h ago
LI
Lauri Isotamm
Born 1974 · 52 y · board member since 09.05.2014
Board member
RT
Rain Tamm
Born 1971 · 55 y · board member since 20.01.2026
Board member

Founders (3)

e-Business Register · 11 h ago
RT
Rain Tamm
Born 1971 · 55 y · founder since 08.05.2014
Founder · 1k €
HK
Heikki Källu
Born 1974 · 52 y · founder since 08.05.2014
Founder · 1k €
LI
Lauri Isotamm
Born 1974 · 52 y · founder since 08.05.2014
Founder · 1k €

Shareholders (4)

e-Business Register · 11 h ago
LI
Lauri Isotamm
Born 1974 · 52 y · shareholder since 01.09.2023
Shareholder 33% · 990 €
HK
Heikki Källu
Born 1974 · 52 y · shareholder since 01.09.2023
Shareholder 33% · 990 €
RT
Rain Tamm
Born 1971 · 55 y · shareholder since 01.09.2023
Shareholder 33% · 990 €
SH

Subsidiaries

e-Business Register · shareholders · 11 h ago

Siena Holding OÜ is a shareholder or officer in 18 more companies. Grouped into 5 EMTAK sectors.

J · Information and communication
6
K · Financial and insurance activities
6
N · Administrative and support service activities
4
C · Manufacturing
1
R · Arts, entertainment and recreation
1
›JInformation and communication6 companies

Annual reports (7)

e-Business Register · annual reports · 10.10.2026
State taxes 2025
5k €
↗ +14.4% vs 2024
Employees 2025
1
0.0% vs 2024
YearRevenueProfitEquityAssetsEmployees

Taxes and employees

Estonian Tax and Customs Board · 10.10.2026 as of
2k €1k €0

Tech stack

Tehnoloogiad
Mobile carrier
+372 6800401Elisa Eesti AS

History

last 2 years · MTA + ÄR + MTR + Procurements
2026
07.07.2026ReportEsitati 2025. aasta aruanne
20.01.2026OfficerAstus juhatusse— Rain Tamm
20.01.2026FilingMuutmiskanne2×expand ›hide ⌃
  • Ä 10195917 / 9 · Olek: Jõustunud
  • Kanne nr 9 · kanne
2025
05.08.2025Esitati 2024. aasta aruanne

Connected companies

Same-person ties · e-Business Register

Siena Holding OÜ is connected to 22 other companies through 3 people who hold a role here and elsewhere. The strongest tie runs through Rain Tamm (9 companies).

Total connections
22
via 3 people
Connecting people
3
Active here
Distinct roles
3
Board member · Founder
Strongest tie
Rain
9 companies
Via personRain Tamm
Siena Holding OÜLEGAL PERSON
Legal person · 12658992 · shareholder since 01.09.2023
Shareholder 1% · 30 €
Subsidiary
Role
Bolt Technology OÜ12417834Shareholder 0%
K12 Technologies OÜ12020427Shareholder 17%
Levila OÜ14791330Shareholder 0%
Modular Technologies OÜ14655118Shareholder 0%
Remato Solutions OÜ14536402Shareholder 0%
Teamscope OÜ12871817Shareholder 2%
›KFinancial and insurance activities6 companies
SubsidiaryRole
Abventure OÜ14208715Shareholder 2%
Clean Kitchen Holdings OÜ17009583Shareholder 0%
Earthtide Holding OÜ16704588Shareholder 3%
Siena Holding OÜ12658992Shareholder 1%
Siena Venture Partners OÜ16076815Founder
Wise Guys Batch 10 OÜ14376051Shareholder 2%
›NAdministrative and support service activities4 companies
SubsidiaryRole
Dermtest OÜ12493982Shareholder 0%
Wise Guys Batch 11 OÜ14392989Shareholder 2%
Wise Guys Batch 9 OÜ14264398Shareholder 1%
Wise Guys Fintech 2 OÜ14533390Shareholder 1%
›CManufacturing1 company
SubsidiaryRole
Lahhentagge OÜ14132567Shareholder 2%
›RArts, entertainment and recreation1 company
SubsidiaryRole
Fotograafia Tallinn OÜ14370427Founder · Shareholder 10%
2025–99 956 €148k €2,2m €107.07.2026
2024–34 853 €111k €2,1m €105.08.2025
2023–23 055 €131k €2,3m €111.07.2024
2022–0 €0 €2,3m €125.08.2023
2021–0 €0 €2,1m €129.05.2023
2020–0 €0 €1,8m €112.01.2023
2019–0 €0 €1,5m €007.07.2022
Original files in PDF – the full register on e-Business Register.View reports on e-Business Register
20222023202420252026
YearRevenue (a)State taxesTaxes on workforceEmployees (Q4)
2026—2 €0 €–
2025—5190 €5980 €1
2024—4537 €4918 €1
2023—4393 €4760 €1
2022—4393 €4760 €1
Quarterly breakdown
YearQ1Q2Q3Q4
Revenue 2026––––
State taxes 20262 €–––
Taxes on workforce 20260 €–––
Employees 2026––––
Revenue 2025––––
State taxes 20251k €1k €1k €1k €
Taxes on workforce 20251k €2k €2k €2k €
Employees 2025111–
Revenue 2024––––
State taxes 20241k €1k €1k €1k €
Taxes on workforce 20241k €1k €1k €1k €
Employees 20241111
Revenue 2023––––
State taxes 20231k €1k €1k €1k €
Taxes on workforce 20231k €1k €1k €1k €
Employees 20231111
Revenue 2022––––
State taxes 20221k €1k €1k €1k €
Taxes on workforce 20221k €1k €1k €1k €
Employees 20221111
Report
9
Lauri Isotamm7
Heikki Källu6
RT
Rain Tamm
board member, founder, shareholder 33%
9 other companies›
CompanyRoleReg. code
AS LHV Group
Founder
11098261
Fotograafia Tallinn OÜ
Shareholder 2%
14370427
LHV Bank AS
Founder
10539549
Luarvik Luarvik OÜ
Board memberShareholder 100%Founder
17218950
Oaklins Estonia OÜ
Shareholder 30%Founder
16422080
Osaühing Kombain & Ko.
Shareholder 100%Board member
10588508
OÜ CEE PE Holding
Board member
11713708
Siena Venture Partners OÜ
Board member
16076815
Teamscope OÜ
Supervisory board member
12871817
LI
Lauri Isotamm
board member, founder, shareholder 33%
7 other companies›
CompanyRoleReg. code
AS LHV Group
Founder
11098261
Heisenberg Ehrmantraut OÜ
Board memberFounderShareholder 100%
HK
Heikki Källu
founder, shareholder 33%
6 other companies›
CompanyRoleReg. code
GILD IB OÜ
Founder
11884290
MAI Baltics Advisory OÜ
Board memberShareholder 50%Founder
12791691
MAI Baltics Advisory OÜ
Shareholder 50%Founder
12709790
Oaklins Estonia OÜ
Shareholder 30%Founder
16422080
osaühing APSPROG
Shareholder 17%
10152260
Siena Venture Partners OÜ
Board member
16076815
Tallinn, F. R. Kreutzwaldi tn 7 // Raua tn 16 korteriühistu
Board member
80351854
12709790
Oaklins Estonia OÜ
Founder
16422080
Osaühing Eralton
Shareholder 100%Board member
10806193
OÜ Superia
Shareholder 2%
11354037
Pühaste Pruulikoda OÜ
Shareholder 0%
12664596

Analysis · 2025

computed from annual reports
Equity ratio6.9%
Current ratio0.03current assets cover under 1× liabilities
Profit per employee99 956 €
Compared with2024

Peer group: Valdusfirmade tegevus, 34 trading companies that filed a report in the last three years.

Founded 2014. That year 9,174 osaühing were registered; 8,831 are still trading, or 96.3%.