ContactTerms
ET/EN/RU
EN
EestiEnglishРусский
nimistuEstonia'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
ContactTerms
ET/EN/RU
EN
EestiEnglishРусский
nimistu
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 · ···
On this page
SanctionsOverviewOfficersShareholdersFoundersBeneficial ownersOther rolesForeign parentSubsidiariesFinancialsTax filingsPledgesPledges as creditorLicencesNoticesTech stackCourt rulingsTVK decisionsBlacklistLabour inspectorateHazardous facilityDPA decisionsTax-deductibleEU lobby registerTrademarksPatentsReal estateVehiclesGrantsProcurementsState paymentsActivityConnected companies
Extension

Right in search

nimistu card above Google, Bing and DuckDuckGo results.

Chrome→Firefox→Edge→
Free · ~14 KB
See the extension →

Overview

e-Business Register · 7 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
  • 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 2026
–
As of 10.04.2026 (MTA)
Employees
–
2026 (MTA)
Taxes paid
2 €
State + labour taxes · 2026 (I kv)
Tax debt
0 €
As of 26.06.2026 (MTA)

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

Data · 7 sourcese-Business Register · 2 min agoMTA
e-Business Register ↗
Revenue 2026
–
As of 10.04.2026 (MTA)
Employees
–
2026 (MTA)
Taxes paid
2 €
State + labour taxes · 2026 (I kv)
Tax debt
€0
As of 26.06.2026 (MTA)

Officers (2)

e-Business Register · 7 h ago
LI
Lauri Isotamm
Born 1974 · 51 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 · 7 h ago
HK
Heikki Källu
Born 1974 · 52 y · founder since 08.05.2014
Founder · 1k €
LI
Lauri Isotamm
Born 1974 · 51 y · founder since 08.05.2014
Founder · 1k €
RT
Rain Tamm
Born 1971 · 55 y · founder since 08.05.2014
Founder · 1k €

Shareholders (4)

e-Business Register · 7 h ago
LI
Lauri Isotamm
Born 1974 · 51 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

Beneficial owners (3)

e-Business Register · 7 h ago
HK
Heikki Källu
Born 1974 · 52 y · ultimate beneficial owner since 14.09.2018
Ultimate beneficial owner
LI
Lauri Isotamm
Born 1974 · 51 y · ultimate beneficial owner since 14.09.2018
Ultimate beneficial owner
RT
Rain Tamm
Born 1971 · 55 y · ultimate beneficial owner since 14.09.2018
Ultimate beneficial owner

Subsidiaries

e-Business Register · shareholders · 7 h ago

Siena Holding OÜ is a shareholder or officer in 18 more companies. Grouped into 6 EMTAK sectors.

J · Information and communication
6
K · Financial and insurance activities
5
N · Administrative and support service activities
4
C · Manufacturing
1
R · Arts, entertainment and recreation
1
S · Other service activities
1
›JInformation and communication

Annual reports (6)

e-Business Register · annual reports · 6 päeva tagasi
State taxes 2025
5k €
↗ +14.4% vs 2024
Employees 2024
1
0.0% vs 2023
YearRevenueProfitEquityAssetsEmployees

Taxes and employees

Estonian Tax and Customs Board · 10.04.2026 as of
2k €1k €0

Tech stack

Tehnoloogiad
Mobile carrier
+372 6800401Elisa Eesti AS

History

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

Connected companies

Same-person ties · e-Business Register

Siena Holding OÜ is connected to 39 other companies through 3 people who hold a role here and elsewhere. The strongest tie runs through Rain Tamm (17 companies).

Total connections
39
via 3 people
Connecting people
3
Active here
Distinct roles
4
Board member · Founder
Strongest tie
Rain
17 companies
Via personRain Tamm
Siena Holding OÜLEGAL PERSON
Legal person · 12658992 · shareholder since 01.09.2023
Shareholder 1% · 30 €
6 companies
SubsidiaryRole
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 activities5 companies
SubsidiaryRole
Abventure OÜ14208715Shareholder 2%
Clean Kitchen Holdings OÜ17009583Shareholder 0%
Earthtide Holding OÜ16704588Shareholder 3%
Siena Holding OÜ12658992Shareholder 1%
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%
›SOther service activities1 company
SubsidiaryRole
Siena Venture Partners OÜ16076815Founder
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
11.07.2024
ReportEsitati 2023. aasta aruanne
10.07.2024FilingTrahvihoiatusmäärus: majandusaasta aruanne esitamata— Ä 10195917 / M2 · Olek: Puudused kõrvaldatud
17
Lauri Isotamm15
Heikki Källu7
RT
Rain Tamm
board member, founder, shareholder 33%, ultimate beneficial owner
17 other companies›
CompanyRoleReg. code
AS LHV Group
Founder
11098261
AS LHV Pank
Founder
10539549
Fotograafia Tallinn OÜ
Ultimate beneficial ownerShareholder 2%
14370427
GILD IB OÜ
Ultimate beneficial owner
11884290
Luarvik Luarvik OÜ
Board memberFounderUltimate beneficial ownerShareholder 100%
17218950
MAI Baltics Advisory OÜ
Ultimate beneficial owner
12709790
Oaklins Estonia OÜ
FounderUltimate beneficial ownerShareholder 30%
16422080
Osaühing Kombain & Ko.
Board memberUltimate beneficial ownerShareholder 100%
10588508
OÜ CEE PE Holding
Ultimate beneficial ownerBoard member
11713708
Siena Venture Partners OÜ
Board memberUltimate beneficial owner
16076815
Teamscope OÜ
Supervisory board member
12871817
Usaldusfond SIENA SECONDARY FUND Co-Invest I
Ultimate beneficial owner
16258215
Usaldusfond SIENA SECONDARY FUND Co-Invest II
Ultimate beneficial owner
16460005
Usaldusfond SIENA SECONDARY FUND Co-Invest III
Ultimate beneficial owner
16718780
Usaldusfond SIENA SECONDARY FUND Co-Invest IV
Ultimate beneficial owner
17251002
Usaldusfond SIENA SECONDARY FUND I
Ultimate beneficial owner
16124081
… and 1 more · see on the person page ↗
LI
Lauri Isotamm
board member, founder, shareholder 33%, ultimate beneficial owner
15 other companies›
CompanyRoleReg. code
AS LHV Group
Founder
11098261
Heisenberg Ehrmantraut OÜ
FounderUltimate beneficial ownerShareholder 100%
HK
Heikki Källu
founder, shareholder 33%, ultimate beneficial owner
7 other companies›
CompanyRoleReg. code
GILD IB OÜ
Founder
11884290
MAI Baltics Advisory OÜ
Board memberFounderUltimate beneficial ownerShareholder 50%
Board member
12791691
Likviidsus SPV OÜ
Ultimate beneficial owner
16163402
MAI Baltics Advisory OÜ
FounderUltimate beneficial ownerShareholder 50%
12709790
NOEP Distillery OÜ
Ultimate beneficial owner
16863476
Oaklins Estonia OÜ
FounderUltimate beneficial ownerShareholder 30%
16422080
osaühing APSPROG
Shareholder 17%
10152260
Siena Venture Partners OÜ
Board memberUltimate beneficial owner
16076815
Tallinn, F. R. Kreutzwaldi tn 7 // Raua tn 16 korteriühistu
Board member
80351854
Usaldusfond SIENA SECONDARY FUND Co-Invest I
Ultimate beneficial owner
16258215
Usaldusfond SIENA SECONDARY FUND Co-Invest II
Ultimate beneficial owner
16460005
Usaldusfond SIENA SECONDARY FUND Co-Invest III
Ultimate beneficial owner
16718780
Usaldusfond SIENA SECONDARY FUND Co-Invest IV
Ultimate beneficial owner
17251002
Usaldusfond SIENA SECONDARY FUND I
Ultimate beneficial owner
16124081
Usaldusfond SIENA SECONDARY FUND II
Ultimate beneficial owner
17034374
12709790
Oaklins Estonia OÜ
FounderUltimate beneficial ownerShareholder 30%
16422080
Osaühing Eralton
Board memberUltimate beneficial ownerShareholder 100%
10806193
OÜ Superia
Shareholder 2%
11354037
Pühaste Pruulikoda OÜ
Shareholder 0%
12664596
Siena Venture Partners OÜ
Ultimate beneficial owner
16076815