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

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© 2026 Nimistu MTÜ. License CC-BY-SA 4.0 · details
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Search›Companies›Co-one OÜ
16208197ActivePrivate limited companyEE102418833 · VAT-registered

Co-one OÜ

Harju maakond, Tallinn, Kesklinna linnaosa, Tartu mnt 82·EMTAK 62901 — Other information technology and computer service activities·5+ years
Andmed · ···
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Overview

e-Business Register · 11 h ago
Registry code
e-Business Register
Legal form
Private limited company
Registered
15.04.2021e-Business Register
Address
Tartu mnt 82, Kesklinna linnaosa, Tallinn, 10112 Harju maakondADS · e-Business Register
E-mail address
arman.kayhan@co-one.coe-Business Register
Website
co-one.coe-Business Register · domain active
Principal activity
EMTAK 62901 - Other information technology and computer service activitiese-Business Register · ETCB
VAT number
ETCB · VAT-registered
Share capital
12 011,39 €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
Data · 12 sourcese-Business Register · 3 min agoMTARTKEIS · PRIABuiltWithWeb tech scan
e-Business Register ↗

Registered 15. aprill 2021, primary activity: Other information technology and computer service activities. Main place of business in Kesklinna linnaosa, Tallinn, Harju maakond.

Revenue 2026 (I kv)
36 116 €
▼ 80% vs 2025 I kv
As of 10.04.2026 (MTA)
Employees
4
2026 (MTA)
Taxes paid
46 651 €
State + labour taxes · 2026 (I kv)
Tax debt
0 €
As of 26.06.2026 (MTA)
Revenue 2026 (I kv)
36k €
▼ 80% vs 2025 I kv
As of 10.04.2026 (MTA)
Employees
4
2026 (MTA)
Taxes paid
47k €
State + labour taxes · 2026 (I kv)
Tax debt
€0
As of 26.06.2026 (MTA)

Tax debt over time

MTA · last 365 d

Current debt: 0,00 €. History updated daily.

30 days
–
no data yet
90 days
–
no data yet
365 days
–
no data yet

Officers (2)

e-Business Register · 11 h ago
MM
Mert Menekşe
Born 1995 · 30 y · board member since 15.04.2021
Board member
AA
Ataberk Arman Kayhan
Born 1996 · 30 y · board member since 15.04.2021
Board member

Founders (2)

e-Business Register · 11 h ago
AA
Ataberk Arman Kayhan
Born 1996 · 30 y · founder since 15.04.2021
Founder · 1k €
MM
Mert Menekşe
Born 1995 · 30 y · founder since 15.04.2021
Founder · 1k €

Shareholders (15)

e-Business Register · 11 h ago
0%50%100%
Founder / management
61.2% · 2
VC
5.0% · 2
Angel
4.4% · 4
Long tail
29.3% · 7
#ShareholderType%€
1
Mert Menekşe
Founder / management30.62%4k €
2
Ataberk Arman Kayhan
Founder / management30.62%4k €
3
Maxis Girişim Sermayesi Portföy Yönetimi A.Ş. Yenilikçi Girişim Sermayesi Yatırım Fonu
Long tail7.00%840,22 €

+ 5 more shareholders – full list below.

Concentration

How tightly the cap table is held. Top-N shows the combined stake of the largest N shareholders; the 80% line is the smallest group that together controls 80%; Gini is 0 when stakes are perfectly equal, 1 when one holder owns everything.

Top 1
30.6%
Top 3
68.2%
Top 5
80.6%
Top 10
95.5%
80% line
5 of 15
Gini
0.62

Dominant holder: 30.6% – non-controlling but blocking.

MM
Mert Menekşe
Born 1995 · 30 y · shareholder since 21.03.2025
Shareholder 31% · 4k €
AA
Ataberk Arman Kayhan
Born 1996 · 30 y · shareholder since 21.03.2025
Shareholder 31% · 4k €
MG
Maxis Girişim Sermayesi Portföy Yönetimi A.Ş. Yenilikçi Girişim Sermayesi Yatırım FonuFOREIGN
Foreign / not in register · shareholder since 21.03.2025
Shareholder 7% · 840,22 €
AP
Ak Portföy Yönetimi A.Ş. AgeSA Emeklilik Teknoloji Girişim Sermayesi Yatırım Fonu
Show all (15)
GS
Gülfem Sena Tandoğan
Born 1978 · 47 y · shareholder since 27.06.2025
Shareholder 1% · 133,34 €
EG
Emrah GültekinAmeerika Ühendriigid · United States
Born 1973 · 52 y · shareholder since 21.03.2025
Shareholder 1% · 60,40 €

Beneficial owners (2)

e-Business Register · 11 h ago
AA
Ataberk Arman Kayhan
Born 1996 · 30 y · ultimate beneficial owner since 15.04.2021
Ultimate beneficial owner
MM
Mert Menekşe
Born 1995 · 30 y · ultimate beneficial owner since 15.04.2021
Ultimate beneficial owner

Annual reports (4)

e-Business Register · annual reports · 6 päeva tagasi
Revenue 2024
253k €
↗ +76.1% vs 2023
State taxes 2025
76k €
↗ +49.5% vs 2024
Employees 2024
2
0.0% vs 2023
YearRevenueProfitEquityAssetsEmployees
2024253 463 €−299 749 €186k €222k €201.07.2025
2023143 923 €−458 123 €186k €202k €201.07.2024
202266 918 €−99 627 €4k €9k €225.05.2023
20211702 €
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 · 10.04.2026 as of
200k €100k €0
20222023202420252026
YearRevenue (a)State taxesTaxes on workforceEmployees (Q4)
2026I Q36 116 €22 551 €24 100 €4
2025469 820 €75 632 €81 457 €4
2024575 820 €50 574 €50 358 €2
2023520 623 €33 055 €34 547 €1
2022107 224 €919 €
Quarterly breakdown
YearQ1Q2Q3Q4
Revenue 202636k €–––
State taxes 202623k €–––
Taxes on workforce 202624k €–––
Employees 20264–––
Revenue 2025180k €136k €41k €112k €
State taxes 202517k €18k €

Tech stack

Website analysis · 12 h tagasi
Domains (1)
co-one.co
SPF
MXGoogle Workspace
NSNamecheap
SRCÄriregister
Detected technologies
Tag managerGoogle Tag Manager

Grants (4 · 167k €)

EIS + PRIA + Kohesio + Estonian Unemployment Insurance Fund
Co-one TA töötaja toetus 2025 H2
EISEttevõtja teadus- ja arendustöötaja toetus 2025Riigieelarve (RE)2026
8158 €
Uncertainty-Aware Continuous Learning in Retrieval Augmented Generation
EISRakendusuuringute toetus väikeprojektide 3. voorRiigieelarve (RE)2025
149 302 €
Co-one TA töötaja toetus 2025 H1
EISEttevõtja teadus- ja arendustöötaja toetus 2025Riigieelarve (RE)2025
6572 €
Co-one TA töötaja toetus
EISEttevõtja teadus- ja arendustöötaja toetus 2024Riigieelarve (RE)2025
2776 €

State-sector payments (6 · 105k €)

RTK Makseandmik · 15.05.2026
Transactions
6
2025–2026 · 2 years
Total amount
105k €
avg 17k €
Buyers
1
State and municipal bodies
Latest
30.03.2026
32k € · MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM

2026: 73k € · 2025: 32k €

20263 transactions · 73k €
30.032026
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
31 964 €
25.032026
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
8158 €
09.022026
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
32 805 €
20252 transactions · 29k €
03.112025
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
22 548 €
14.102025
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
6572 €
Show remaining 1 transactions+
20251 transaction · 3k €
21.042025
MAJANDUS- JA KOMMUNIKATSIOONIMINISTEERIUM70003158
MUUD TOETUSED · Teadus- ja arendustegevus üldises majandus-, kaubandus- ja tööjõupoliitikas
2776 €

History

last 2 years · MTA + ÄR + MTR + Procurements
2026
11.06.2026TaxMaksuvõlg kasvas— +9213 € (kokku 9213 €)
2025
01.07.2025ReportEsitati 2024. aasta aruanne— Käive 253 463 €
27.06.2025OfficerSai osanikuks3×expand ›hide ⌃
  • Gülfem Sena Tandoğan · · 1 %
  • Ak Portföy Yönetimi A.Ş. Birinci Teknoloji Girişim Sermayesi Yatırım Fonu · 6 %
  • Ak Portföy Yönetimi A.Ş. AgeSA Emeklilik Teknoloji Girişim Sermayesi Yatırım Fonu · 6 %
06.05.2025FilingMuutmiskanne2×expand ›hide ⌃
  • Ä 50171633 / 9 · Olek: Jõustunud
  • Kanne nr 9 · kanne
11.04.2025FilingMuutmiskanne— Ä 50171633 / M4 · Olek: Jõustunud
31.03.2025FilingMuutmiskanne— Ä 50171633 / M3 · Olek: Jõustunud
21.03.2025OfficerSai osanikuks12×expand ›hide ⌃
  • Mert Menekşe · · 31 %
  • Yigit Baris Semin · · 1 %
  • Siret Ünsal · · 0 %
  • İstanbul Portföy Yönetimi A.Ş. Techone Girişim Sermayesi Yatırım Fonu · 5 %
  • Domino Ventures Fund Coöperatief U.A. · 3 %
  • Lima Next Ventures Finansal Danışmanlık ve Ticaret Anonim Şirketi · 2 %
  • Emrah Gültekin · · 1 %
  • Maxis Girişim Sermayesi Portföy Yönetimi A.Ş. Yenilikçi Girişim Sermayesi Yatırım Fonu · 7 %
  • Aydin Mizrahi · · 1 %
  • Trangels Finansal Hizmetler Anonim Şirketi · 4 %
  • Ataberk Arman Kayhan · · 31 %
  • LEAP TEKNOLOJİ YATIRIMLARI ANONİM ŞİRKETİ · 1 %
2024
01.07.2024ReportEsitati 2023. aasta aruanne— Käive 143 923 €
4
Ak Portföy Yönetimi A.Ş. AgeSA Emeklilik Teknoloji Girişim Sermayesi Yatırım Fonu
Long tail
6.17%
740,95 €
5
Ak Portföy Yönetimi A.Ş. Birinci Teknoloji Girişim Sermayesi Yatırım Fonu
Long tail6.17%740,95 €
6
İstanbul Portföy Yönetimi A.Ş. Techone Girişim Sermayesi Yatırım Fonu
Long tail5.01%602,12 €
7
Trangels Finansal Hizmetler Anonim Şirketi
Long tail3.52%422,71 €
8
Domino Ventures Fund Coöperatief U.A.
VC2.99%358,86 €
9
Lima Next Ventures Finansal Danışmanlık ve Ticaret Anonim Şirketi
VC2.01%241,54 €
10
Aydin Mizrahi
Angel1.41%169,08 €
FOREIGN
Foreign / not in register · shareholder since 27.06.2025
Shareholder 6% · 740,95 €
AP
Ak Portföy Yönetimi A.Ş. Birinci Teknoloji Girişim Sermayesi Yatırım FonuFOREIGN
Foreign / not in register · shareholder since 27.06.2025
Shareholder 6% · 740,95 €
İP
İstanbul Portföy Yönetimi A.Ş. Techone Girişim Sermayesi Yatırım FonuFOREIGN
Foreign / not in register · shareholder since 21.03.2025
Shareholder 5% · 602,12 €
TF
Trangels Finansal Hizmetler Anonim ŞirketiFOREIGN
Foreign / not in register · shareholder since 21.03.2025
Shareholder 4% · 422,71 €
DV
Domino Ventures Fund Coöperatief U.A.FOREIGN
Foreign / not in register · shareholder since 21.03.2025
Shareholder 3% · 358,86 €
LN
Lima Next Ventures Finansal Danışmanlık ve Ticaret Anonim ŞirketiFOREIGN
Foreign / not in register · shareholder since 21.03.2025
Shareholder 2% · 241,54 €
AM
Aydin Mizrahi
Born 1975 · 51 y · shareholder since 21.03.2025
Shareholder 1% · 169,08 €
YB
Yigit Baris Semin
Born 1985 · 40 y · shareholder since 21.03.2025
Shareholder 1% · 169,08 €
LT
LEAP TEKNOLOJİ YATIRIMLARI ANONİM ŞİRKETİFOREIGN
Foreign / not in register · shareholder since 21.03.2025
Shareholder 1% · 140,77 €
SÜ
Siret Ünsal
Born 1981 · 45 y · shareholder since 21.03.2025
Shareholder 0% · 36,25 €
−36 908 €
104k €
104k €
2
31.05.2023
763 €
1
18k €
23k €
Taxes on workforce 202518k €19k €20k €24k €
Employees 20253344
Revenue 2024139k €129k €173k €135k €
State taxes 202410k €12k €12k €16k €
Taxes on workforce 202410k €11k €12k €17k €
Employees 20241122
Revenue 202378k €146k €156k €140k €
State taxes 20235k €9k €9k €9k €
Taxes on workforce 20235k €10k €10k €10k €
Employees 20231111
Revenue 20226k €36k €23k €43k €
State taxes 2022––183 €736 €
Taxes on workforce 2022––0 €763 €
Employees 2022–––1