---
title: "Chester C. Y. Koo — Ownership Dossier"
canonical: https://whiteintel.dev/entity/9fc5dd44-0a48-589a-91ec-22acef954008
json: https://whiteintel.dev/api/public/dossier/9fc5dd44-0a48-589a-91ec-22acef954008
identifier: icij:icijol-117505
jurisdiction: TW
risk: Medium
source: WhiteIntel corporate-ownership graph
---

# Chester C. Y. Koo

**Type:** Organization  
**Jurisdiction:** TW  
**Identifier:** `icij:icijol-117505`  
**Risk level:** Medium  
**Canonical dossier:** https://whiteintel.dev/entity/9fc5dd44-0a48-589a-91ec-22acef954008  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/9fc5dd44-0a48-589a-91ec-22acef954008  

## Ownership & control

### Holdings / subsidiaries

- **Grand Channel Holding Co., Ltd.** (director of) — https://whiteintel.dev/entity/2a0712a5-8620-5c6d-9666-85f0f5fba4ee
- **Cedar Creek Investment Co., Ltd.** (director of) — https://whiteintel.dev/entity/6b1d985e-082c-504e-9cc2-2fb8daf9ac93
- **Keystone Venture Management Corp.** (director of) — https://whiteintel.dev/entity/9684dfc0-94b1-5d9d-bc1b-88598c6e1fe2
- **Genesis Investment Consultants Co., Ltd.** (director of) — https://whiteintel.dev/entity/517d0e70-5696-54ab-927c-fb4991e8ecd3
- **Flagship Investment Group Co., Ltd.** (director of) — https://whiteintel.dev/entity/1d184dcf-3276-5a50-af09-71801ec94921
- **Alliance Investment Holdings Co., Ltd.** (director of) — https://whiteintel.dev/entity/516c4895-7e46-5a52-a3ba-9b62322839c6
- **New Vision Development Co., Ltd.** (director of) — https://whiteintel.dev/entity/64d22da8-85ad-5e47-8f29-c541e5f985c2
- **Quantum Investment Services Co., Ltd.** (director of) — https://whiteintel.dev/entity/02b2bbc2-bd58-5a93-8654-ccdce7995a6a
- **Insight Datacom Holdings Co., Ltd.** (director of) — https://whiteintel.dev/entity/d0308a55-8b09-5998-9bb0-78e762bd9175
- **Excelsior Holdings Development Corp.** (director of) — https://whiteintel.dev/entity/3a4826c6-7ddf-54bb-8f02-76d7756391b0
- **ESTAR CABLE LTD.** (beneficial owner of) — https://whiteintel.dev/entity/9ea22ca9-ac61-5da6-ba1f-048958a83978
- **ESTAR CABLE LTD.** (beneficiary of) — https://whiteintel.dev/entity/9ea22ca9-ac61-5da6-ba1f-048958a83978

…and **1** more subsidiaries/holdings. Resolve the full list with `get_dossier` on the WhiteIntel MCP (`npx -y @whiteintel/mcp-server`) or a one-off dossier — https://whiteintel.dev/pricing.

## Provenance

- ICIJ Offshore Leaks — https://offshoreleaks.icij.org/nodes/117505

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **Chester C. Y. Koo** — https://whiteintel.dev/entity/9fc5dd44-0a48-589a-91ec-22acef954008 · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Chester C. Y. Koo**. Human view: https://whiteintel.dev/entity/9fc5dd44-0a48-589a-91ec-22acef954008 · Structured JSON: https://whiteintel.dev/api/public/dossier/9fc5dd44-0a48-589a-91ec-22acef954008._

_Risk levels are heuristic investigative leads, not legal determinations of beneficial ownership. Every claim carries a source; an absent edge means "not yet observed in current sources", not "does not exist"._