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Search›Companies›Siena Venture Partners OÜ
16076815ActivePrivate limited companyEE102936470 · VAT-registered

Siena Venture Partners OÜ

Harju maakond, Tallinn, Kesklinna linnaosa, Toom-Rüütli tn 10/1-1·EMTAK 66301 — Fund management activities·5+ years
Andmed · ···
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Overview

e-Business Register · 17 h ago
Registry code
e-Business Register
Legal form
Private limited company
Registered
15.10.2020e-Business Register
Address
Toom-Rüütli tn 10/1-1, Kesklinna linnaosa, Tallinn, 10130 Harju maakondADS · e-Business Register
E-mail address
info@siena.eee-Business Register
Telephone
+372 56800415· Telia Eesti ASe-Business Register · TTJA NBA
Principal activity
EMTAK 66301 - Fund management activitiese-Business Register · ETCB
VAT number
ETCB · VAT-registered
Share capital
25 000,00 €e-Business Register
nimistu
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

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  • 79 sources
  • Database
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  • MCP

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  • Donation terms
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© 2026 Nimistu MTÜ. License CC-BY-SA 4.0 · details
Data · 9 sourcese-Business Register · 5 min agoMTAMTRFinantsinspektsioon
e-Business Register ↗

Registered 15. oktoober 2020, primary activity: Fund management activities. Main place of business in Kesklinna linnaosa, Tallinn, Harju maakond.

Revenue 2026 II kv
6610 €
As of 10.07.2026 (MTA)
Employees
2
2026 (MTA)
Taxes paid
57 798 €
State + labour taxes · 2026 II kv
Tax debt
0 €
As of 10.08.2026 (MTA)
Revenue 2026 (I-II kv)
12k €
As of 10.07.2026 (MTA)
Employees
2
2026 (MTA)
Taxes paid
108k €
State + labour taxes · 2026 (I-II kv)
Tax debt
€0
As of 10.08.2026 (MTA)

Tax debt over time

MTA · last 365 d
Current €0max 32k €
12 May 202626 Jun 202611 Aug 2026
30 days
−6k €
5609,83 € → 0,00 €
90 days
−32k €
31 965,08 € → 0,00 €
365 days
–
no data yet

Officers (3)

e-Business Register · 17 h ago
LI
Lauri Isotamm
Born 1974 · 52 y · board member since 15.10.2020
Board member
RR
Rando Rannus
Born 1979 · 46 y · board member since 15.10.2020
Board member
RT
Rain Tamm
Born 1971 · 55 y · board member since 09.12.2022
Board member

Founders (2)

e-Business Register · 17 h ago
SH
Siena Holding OÜLEGAL PERSON
Legal person · 12658992 · founder since 15.10.2020
Founder · 2k €
PR
Panta Rhei Ventures OÜLEGAL PERSON
Legal person · 12445397 · founder since 15.10.2020
Founder · 1k €

Shareholders (3)

e-Business Register · 17 h ago
HE
Heisenberg Ehrmantraut OÜLEGAL PERSON
Legal person · 12791691 · shareholder since 08.07.2025
Shareholder 38% · 9k €
LL
Luarvik Luarvik OÜLEGAL PERSON
Legal person · 17218950 · shareholder since 08.07.2025
Shareholder 38% · 9k €
PR
Panta Rhei Ventures OÜLEGAL PERSON
Legal person · 12445397 · shareholder since 26.08.2024
Shareholder 25% · 6k €

Subsidiaries

e-Business Register · shareholders · 17 h ago
Siena Venture Partners OÜ16076815Usaldusfond SIENA SECONDA…16258215Usaldusfond SIENA SECONDA…16460005Usaldusfond SIENA SECONDA…16718780Usaldusfond SIENA SECONDA…17251002Usaldusfond SIENA SECONDA…16124081Usaldusfond SIENA SECONDA…17034374
Siena Venture Partners OÜ is a shareholder or officer in 6 more companies.

Fund manager (2)

e-Business Register · 17 h ago
Usaldusfond SIENA SECONDARY FUND Co-Invest I
Rahaturufondide ja muude investeerimisfondide tegevus
16258215
Usaldusfond SIENA SECONDARY FUND I
Rahaturufondide ja muude investeerimisfondide tegevus
16124081

Registrar of the members (6)

e-Business Register · 17 h ago
Usaldusfond SIENA SECONDARY FUND Co-Invest I
Rahaturufondide ja muude investeerimisfondide tegevus
16258215
Usaldusfond SIENA SECONDARY FUND Co-Invest II
Usaldusfondide, investeerimisfondide ja sarnaste finantsüksuste investeerimine võlakirjadesse, väärtpaberitesse jms finantsvahenditesse
16460005
Usaldusfond SIENA SECONDARY FUND Co-Invest III
Usaldusfondide, investeerimisfondide ja sarnaste finantsüksuste investeerimine võlakirjadesse, väärtpaberitesse jms finantsvahenditesse
16718780
Usaldusfond SIENA SECONDARY FUND Co-Invest IV
Rahaturufondide ja muude investeerimisfondide tegevus
17251002
Usaldusfond SIENA SECONDARY FUND I
Rahaturufondide ja muude investeerimisfondide tegevus
16124081
Usaldusfond SIENA SECONDARY FUND II
Rahaturufondide ja muude investeerimisfondide tegevus
17034374

General partner (6)

e-Business Register · 17 h ago
Usaldusfond SIENA SECONDARY FUND Co-Invest I
Rahaturufondide ja muude investeerimisfondide tegevus
16258215
Usaldusfond SIENA SECONDARY FUND Co-Invest II
Usaldusfondide, investeerimisfondide ja sarnaste finantsüksuste investeerimine võlakirjadesse, väärtpaberitesse jms finantsvahenditesse
16460005
Usaldusfond SIENA SECONDARY FUND Co-Invest III
Usaldusfondide, investeerimisfondide ja sarnaste finantsüksuste investeerimine võlakirjadesse, väärtpaberitesse jms finantsvahenditesse
16718780
Usaldusfond SIENA SECONDARY FUND Co-Invest IV
Rahaturufondide ja muude investeerimisfondide tegevus
17251002
Usaldusfond SIENA SECONDARY FUND I
Rahaturufondide ja muude investeerimisfondide tegevus
16124081
Usaldusfond SIENA SECONDARY FUND II
Rahaturufondide ja muude investeerimisfondide tegevus
17034374

Annual reports (5)

e-Business Register · annual reports · 5 päeva tagasi
State taxes 2025
178k €
↗ +666% vs 2024
Employees 2025
2
↗ +100.0% vs 2024
YearRevenueProfitEquityAssetsEmployees
20251 130 130 €652 069 €132k €177k €229.06.2026
2024–46 471 €151k €158k €131.05.2025
2023–30 740 €178k €179k €020.06.2024
2022–65 071 €148k €
Original files in PDF – the full register on e-Business Register.View reports on e-Business Register

Taxes, revenue and employees

Estonian Tax and Customs Board · 10.07.2026 as of
YearRevenue (a)State taxesTaxes on workforceEmployees (Q4)
2026I-II Q11 991 €76 228 €32 190 €2
2025I-IV Q4978 €177 692 €25 478 €2
2024–23 183 €3410 €2
2023–318 €11 €–
2022–89 €0 €–
Quarterly breakdown
YearQ1Q2Q3Q4
Revenue 20265k €7k €––
State taxes 202634k €42k €––
Taxes on workforce 202617k €15k €––
Employees 202622––
Revenue 2025–––5k €
State taxes 20254k €27k €

Licences (1)

MTR · 16 h tagasi
Active licences
1
Finantsteenused1
Oldest · Newest
2020→2020
Oldest licenceFFA000408 · 08.12.2020
Active1 / 1
FFA000408
Finantseerimisasutusena tegutsemine
Tegevusluba
From08.12.2020
UntilOpen-ended
Valid

Tech stack

Tehnoloogiad
Mobile carrier
+372 56800415Telia Eesti AS

History

last 2 years · MTA + ÄR + MTR + Procurements
2026
11.07.2026TaxMaksuvõlg vähenes— −26 355 € (jäänud 5610 €)
29.06.2026ReportEsitati 2025. aasta aruanne— Käive 1 130 130 €
10.06.2026FilingMuutmiskanne2×expand ›hide ⌃
  • Ä 50157482 / 7 · Olek: Jõustunud
  • Kanne nr 7 · kanne
12.05.2026TaxMaksuvõlg kasvas— +31 965 € (kokku 31 965 €)
2025
10.11.2025FilingMuutmiskanne2×expand ›hide ⌃
  • Ä 50157482 / 6 · Olek: Jõustunud
  • Kanne nr 6 · kanne
08.07.2025OfficerSai osanikuks2×expand ›hide ⌃
  • Luarvik Luarvik OÜ · · 38 %
  • Heisenberg Ehrmantraut OÜ · · 38 %
31.05.2025ReportEsitati 2024. aasta aruanne
2024
27.08.2024FilingMuutmiskanne2×expand ›hide ⌃
  • Ä 50157482 / 5 · Olek: Jõustunud
  • Kanne nr 5 · kanne
26.08.2024OfficerSai osanikuks— Panta Rhei Ventures OÜ · · 25 %

Connected companies

Same-person ties · e-Business Register

Siena Venture Partners 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
1
Board member
Strongest tie
Rain
9 companies
Via personRain Tamm9Lauri Isotamm7Rando Rannus6
RT
Rain Tamm
board member
9 other companies›
CompanyRoleReg. code
AS LHV Group
Founder
11098261
AS LHV Pank
Founder
10539549
Fotograafia Tallinn OÜ
148k €
0
29.06.2023
2021–79 443 €82k €85k €007.06.2022
98k €
49k €
Taxes on workforce 20254k €4k €4k €13k €
Employees 20252222
Revenue 2024––––
State taxes 20241k €10k €755 €11k €
Taxes on workforce 2024363 €159 €379 €3k €
Employees 2024––22
Revenue 2023––––
State taxes 2023–310 €–8 €
Taxes on workforce 2023–11 €–0 €
Employees 2023––––
Revenue 2022––––
State taxes 202289 €–––
Taxes on workforce 20220 €–––
Employees 2022––––
Shareholder 2%
14370427
Luarvik Luarvik OÜ
Shareholder 100%FounderBoard member
17218950
Oaklins Estonia OÜ
Shareholder 30%Founder
16422080
Osaühing Kombain & Ko.
Board memberShareholder 100%
10588508
OÜ CEE PE Holding
Board member
11713708
Siena Holding OÜ
Board memberFounderShareholder 33%
12658992
Teamscope OÜ
Supervisory board member
12871817
LI
Lauri Isotamm
board member
7 other companies›
CompanyRoleReg. code
AS LHV Group
Founder
11098261
Heisenberg Ehrmantraut OÜ
Shareholder 100%FounderBoard member
12791691
MAI Baltics Advisory OÜ
Shareholder 50%Founder
12709790
Oaklins Estonia OÜ
Shareholder 30%Founder
16422080
osaühing APSPROG
Shareholder 17%
10152260
Siena Holding OÜ
Board memberFounderShareholder 33%
12658992
Tallinn, F. R. Kreutzwaldi tn 7 // Raua tn 16 korteriühistu
Board member
80351854
RR
Rando Rannus
board member
6 other companies›
CompanyRoleReg. code
Eesti Era- ja Riskikapitali Assotsiatsioon
Board member
80295682
EstBAN Nordic Angels II OÜ
Board member
14580030
Likviidsus SPV OÜ
Board member
16163402
Mittetulundusühing Asutajad
Founder
80305937
Panta Rhei Ventures OÜ
Shareholder 100%Board memberFounder
12445397
Rabbit Hole OÜ
Board member
14411876

Documents (4)

dokumendiregister.ee
  • 22.08.2024Vastuskiri· Väljaminev kiriRahapesu Andmebüroo
  • 21.08.2024Taotlus· Sissetulev kiriRahapesu Andmebüroo
  • 18.07.2023Teade· Sissetulev kiriRahapesu Andmebüroo
  • 11.11.2021Kaaskiri· Sissetulev kiriRahapesu Andmebüroo

Analysis · 2025

computed from annual reports
Revenue1,1m €median 110k €10.3× the sector median
Net margin57.7%median 22.3%+35.4 pp vs sector median
Revenue per employee565k €median 150k €3.8× the sector median
Equity ratio74.3%
Current ratio3.88
Labour cost of revenue6.8%
Profit per employee326 035 €
Compared with2024

Peer group: Fondide valitsemine, 60 trading companies that filed a report in the last three years.

Founded 2020. That year 15,799 osaühing were registered; 15,242 are still trading, or 96.5%.