Who owns Siena Holding OÜ?

In the current sources, Siena Holding OÜ is connected to Heikki Källu, Lauri Isotamm, Rain Tamm. Trace the full chain to the ultimate beneficial owner in the WhiteIntel ownership graph.

What is Siena Holding OÜ's risk level?

Siena Holding OÜ has not yet been risk-scored — absence of a score means "not yet assessed", not "clean". Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership.

Where does Siena Holding OÜ appear across sources?

Siena Holding OÜ is indexed in the WhiteIntel corporate-ownership graph (EE), with a source on every claim.

LIVE · CORPUS

SnitchScore · reading…

evidence coverage · reading…

Coverage — measured

Sources fused: 1
Ownership hops held: 5

An absent edge means not yet observed — never does not exist.

Legal entityUnscoredRegistrisse kantud

Siena Holding OÜ

Name: Siena Holding OÜ — ownership dossier
Creator: WhiteIntel
License: https://whiteintel.dev/terms
Keywords: corporate ownership, beneficial ownership, UBO, corporate intelligence, OSINT, corporate registry, Siena Holding OÜ, Company, EE

Siena Holding OÜ — EE company (ee-regcode:12658992). UBO chain traced 5 hops, 3 owners. Cited to 1 registry.

EE-REGCODE 12658992Company

Ownership graph Export .md

JSON / MCPsample

The finding

Ownership resolves 5 hops deep toward the ultimate beneficial owner.

Investigative lead by resolved identity, not a legal determination.

/01

Registry identity

Status: Registrisse kantud

/02

Ownership & control

Links are shown as observed in a source registry — we do not currently hold ownership end dates, so a link here may since have ended. Each row carries its source; check it before relying on currency.

Owners / controllers

Siena Holding OÜ
- Heikki Källu· beneficial owner· via estonia_ariregister
- Lauri Isotamm· beneficial owner· via estonia_ariregister
- Rain Tamm· beneficial owner· via estonia_ariregister

Holdings / subsidiaries

None in current sources.

Walk the full UBO chain

5 hops lockedSTANDARD

5-step ownership / control trace to the ultimate beneficial owner — cited at every hop. Unlock the full chain.

Unlock Standard Dossier€39

/03

People & control

3 parties · 0 current

Every officer, person with significant control and cross-company role we hold, resolved into one entry per party. Roles are registry records, not a claim of control.

●
Heikki Källu
Also holds roles at 4 other companies
- MAI Baltics Advisory OÜJuhatuse liige
- Osaühing EraltonJuhatuse liige
- MAI Baltics Advisory OÜbeneficial owner
●
Lauri Isotamm
Also holds roles at 15 other companies
- Heisenberg Ehrmantraut OÜJuhatuse liige
- Siena Venture Partners OÜJuhatuse liige
- Tallinn, F. R. Kreutzwaldi tn 7 // Raua tn 16 korteriühistuJuhatuse liige

1 additional party & networkSTANDARD

Unlock all 3 parties, full beneficial ownership chains & directorship networks.

Unlock Standard Dossier€39

3 parties · 0 current. Ceased and resigned records are retained as history.

Standard Dossier€39

The full ownership trace on this subject — every hop to the ultimate owner, its filing history and sanctions exposure — as PDF and JSON, every claim linked to its source.

Everything we hold on Siena Holding OÜ, resolved and sourced — yours to keep, no subscription.

INCLUDED WHEN YOU UNLOCK

UBO trace
Branded PDF + un-redacted JSON · every claim linked to its source
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UBO trace

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WHAT YOU CAN SEEFREE

YOURS NOW · FREE

4 items you can read right now — no account, no payment.

Identity, address & registry profile
Sanctions & watchlist detail
Direct connections (1 hop)
Community notes

YOURS AFTER YOU UNLOCK · PAID

2 more items, hidden until you unlock this dossier. The badge on each row names the dossier that includes it.

Full ownership trace to the UBOSTANDARD
Full export (PDF + un-redacted JSON) & change alertsPREMIUM

/04

Register record, filings & financials

Estonian e-Business Register (RIK)

Status: Registrisse kantud
Legal form: Osaühing

/05

Common questions

Who owns Siena Holding OÜ?: In the current sources, Siena Holding OÜ is connected to Heikki Källu, Lauri Isotamm, Rain Tamm. Trace the full chain to the ultimate beneficial owner in the WhiteIntel ownership graph.
What is Siena Holding OÜ's risk level?: Siena Holding OÜ has not yet been risk-scored — absence of a score means "not yet assessed", not "clean". Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership.
Where does Siena Holding OÜ appear across sources?: Siena Holding OÜ is indexed in the WhiteIntel corporate-ownership graph (EE), with a source on every claim.

Community intel

Crowd leads · unverified

Tips, corrections and leads contributed by the community on Siena Holding OÜ. These are unverified leads, not WhiteIntel findings — we surface them for investigators to chase, and analyse the corroborated ones into SnitchScore.

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