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Search›Persons›Dennis Bykov
DB
50108027019Born 02.08.2001 · 24 y

Dennis Bykov

Data is aggregated from the Business Register's open data. Every role shows its source and date.

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Estonia's public business register
HomeViewsIndustriesSourcesAbout

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
3active companies6years active
Ultimate beneficial owner
3
companies
Shareholder
3
companies
Board member
3
companies
Founder
2
companies
Top role
Excelsior Inter OÜ
Shareholder + Ultimate beneficial owner + Board member
since 14.08.2019 · 6 y
Latest activity
Cybersecurity OÜ
Founder + Ultimate beneficial owner + Shareholder + Board member
since 23.02.2026

Career timeline

e-Business Register
20192021202320252026Cybersecurity OÜExcelsior Inter OÜGUARDIUM OÜasutajakasusaajaosanikjuhatuse_liigeosanikkasusaajajuhatuse_liigeosanikkasusaajaasutajajuhatuse_liige

History

e-Business Register · last 2 years
2026
23.02.2026OfficerSai osanikuks— Cybersecurity OÜ · Cybersecurity OÜ · 100 %
23.02.2026OfficerLisati tegelikuks kasusaajaks— Cybersecurity OÜ · Cybersecurity OÜ
23.02.2026OfficerAsutas ettevõtte— Cybersecurity OÜ · Cybersecurity OÜ
23.02.2026OfficerAstus juhatusse— Cybersecurity OÜ · Cybersecurity OÜ
2025

Companies (3)

e-Business Register
EI
Excelsior Inter OÜ14711319Active
Põhja-Tallinna linnaosa, Tallinn, Harju maakond·EMTAK 96229
Shareholder 75% · 01.09.2023Ultimate beneficial owner · 24.05.2023Board member · 14.08.2019
6y
active
24k €
GO
GUARDIUM OÜ17325798
Board memberFounderShareholderBeneficial ownerSupervisory board
  • Cybersecurity OÜ – asutaja (2026-02-23 – now), kasusaaja (2026-02-23 – now), osanik (2026-02-23 – now), juhatuse_liige (2026-02-23 – now)
  • Excelsior Inter OÜ – osanik (2023-09-01 – now), kasusaaja (2023-05-24 – now), juhatuse_liige (2019-08-14 – now)
  • GUARDIUM OÜ – osanik (2025-09-12 – now), kasusaaja (2025-09-12 – now), asutaja (2025-09-12 – now), juhatuse_liige (2025-09-12 – now)
12.09.2025OfficerSai osanikuks— GUARDIUM OÜ · GUARDIUM OÜ · 50 %
12.09.2025OfficerLisati tegelikuks kasusaajaks— GUARDIUM OÜ · GUARDIUM OÜ
12.09.2025OfficerAsutas ettevõtte— GUARDIUM OÜ · GUARDIUM OÜ
12.09.2025OfficerAstus juhatusse— GUARDIUM OÜ · GUARDIUM OÜ
Active
Põhja-Tallinna linnaosa, Tallinn, Harju maakond·EMTAK 62901
Shareholder 50% · 12.09.2025Ultimate beneficial owner · 12.09.2025Founder · 12.09.2025Board member · 12.09.2025
CO
Cybersecurity OÜ17443546Active
Põhja-Tallinna linnaosa, Tallinn, Harju maakond·EMTAK 62901
Founder · 23.02.2026Ultimate beneficial owner · 23.02.2026Shareholder 100% · 23.02.2026Board member · 23.02.2026