---
title: "ENCYCLIS PROTOS HOLDCO LIMITED — Ownership Dossier"
canonical: https://whiteintel.dev/entity/3dcfd831-b29d-548a-b330-a4e8efdcbbb8
json: https://whiteintel.dev/api/public/dossier/3dcfd831-b29d-548a-b330-a4e8efdcbbb8
identifier: oo:GB-COH-11915696
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# ENCYCLIS PROTOS HOLDCO LIMITED

**Type:** Company  
**Jurisdiction:** GB  
**Identifier:** `oo:GB-COH-11915696`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/3dcfd831-b29d-548a-b330-a4e8efdcbbb8  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/3dcfd831-b29d-548a-b330-a4e8efdcbbb8  

## Ownership & control

### Owners / controllers

- **GREEN EMPIRE WTE HOLDINGS LIMITED** (beneficial owner) — 75% — https://whiteintel.dev/entity/9cacab9a-8f33-52aa-883c-6228d7e723dc
- **ENCYCLIS EUROPE INVESTMENTS LIMITED** (beneficial owner) — 50% — https://whiteintel.dev/entity/a79137b3-8554-5e1c-9dd3-5f7071c6c813
- **ENCYCLIS BIDCO LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/e3ea7a1c-0aa3-51b8-808b-57503d2668a2
- **ENCYCLIS BIDCO LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/e3ea7a1c-0aa3-51b8-808b-57503d2668a2
- **ENCYCLIS EUROPE INVESTMENTS LIMITED** (beneficial owner) — 37.5% — https://whiteintel.dev/entity/a79137b3-8554-5e1c-9dd3-5f7071c6c813

### Holdings / subsidiaries

- **PROTOS HOLDING LIMITED** (beneficial owner) — 100% — https://whiteintel.dev/entity/cd622ac8-6b04-5fdb-9e10-ab97e8c798c2
- **PROTOS HOLDING LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/cd622ac8-6b04-5fdb-9e10-ab97e8c798c2

### UBO chain (walk to the ultimate owner)

1. **GREEN EMPIRE WTE HOLDINGS LIMITED** — beneficial owner 75% → *ENCYCLIS PROTOS HOLDCO LIMITED*
1. **ENCYCLIS EUROPE INVESTMENTS LIMITED** — beneficial owner 50% → *ENCYCLIS PROTOS HOLDCO LIMITED*
1. **ENCYCLIS BIDCO LIMITED** — beneficial owner 100% → *ENCYCLIS PROTOS HOLDCO LIMITED*
1. **ENCYCLIS BIDCO LIMITED** — beneficial owner 87.5% → *ENCYCLIS PROTOS HOLDCO LIMITED*
1. **ENCYCLIS EUROPE INVESTMENTS LIMITED** — beneficial owner 37.5% → *ENCYCLIS PROTOS HOLDCO LIMITED*
2. **GREEN INVESTMENT GROUP INVESTMENTS LIMITED** — beneficial owner 87.5% → *GREEN EMPIRE WTE HOLDINGS LIMITED*
2. **ENCYCLIS HOLDCO LIMITED** — beneficial owner → *ENCYCLIS EUROPE INVESTMENTS LIMITED*
2. **Covanta Holding 2 Uk Limited** — beneficial owner 87.5% → *ENCYCLIS EUROPE INVESTMENTS LIMITED*
2. **Covanta Europe Holdings, S.A.R.L** — beneficial owner 87.5% → *ENCYCLIS EUROPE INVESTMENTS LIMITED*
2. **ENCYCLIS MIDCO LIMITED** — beneficial owner 100% → *ENCYCLIS BIDCO LIMITED*
2. **Mr Thomas Edward Spicer** — beneficial owner → *ENCYCLIS BIDCO LIMITED*
2. **ENCYCLIS MIDCO LIMITED** — beneficial owner 87.5% → *ENCYCLIS BIDCO LIMITED*
3. **ENCYCLIS HOLDCO LIMITED** — beneficial owner 100% → *ENCYCLIS MIDCO LIMITED*
3. **Mr Max Anthony Philip Seely** — beneficial owner → *ENCYCLIS MIDCO LIMITED*
3. **Mr Thomas Edward Spicer** — beneficial owner → *ENCYCLIS MIDCO LIMITED*
3. **ENCYCLIS HOLDCO LIMITED** — beneficial owner 87.5% → *ENCYCLIS MIDCO LIMITED*
3. **Mr Thomas Edward Spicer** — beneficial owner → *ENCYCLIS MIDCO LIMITED*
3. **Mr Max Anthony Philip Seely** — beneficial owner → *ENCYCLIS MIDCO LIMITED*
3. **COVANTA HOLDING UK LIMITED** — beneficial owner 87.5% → *Covanta Holding 2 Uk Limited*
3. **GREEN INVESTMENT GROUP LIMITED** — beneficial owner 87.5% → *GREEN INVESTMENT GROUP INVESTMENTS LIMITED*
3. **COVERT UK TOPCO LIMITED** — beneficial owner 100% → *ENCYCLIS HOLDCO LIMITED*
3. **Mr Thomas Edward Spicer** — beneficial owner → *ENCYCLIS HOLDCO LIMITED*
3. **Mr Max Anthony Philip Seely** — beneficial owner → *ENCYCLIS HOLDCO LIMITED*
3. **Mr Max Anthony Philip Seely** — beneficial owner → *ENCYCLIS HOLDCO LIMITED*
3. **Mr Thomas Edward Spicer** — beneficial owner → *ENCYCLIS HOLDCO LIMITED*
3. **COVERT UK TOPCO LIMITED** — beneficial owner 87.5% → *ENCYCLIS HOLDCO LIMITED*
4. **Eqt Infrastructure V Co-Investment (B) Scsp** — beneficial owner → *COVERT UK TOPCO LIMITED*
4. **Mr Thomas Edward Spicer** — beneficial owner → *COVERT UK TOPCO LIMITED*
4. **Covert Luxco Ii S.À R.L.** — beneficial owner → *COVERT UK TOPCO LIMITED*
4. **Mr Thomas Edward Spicer** — beneficial owner → *COVERT UK TOPCO LIMITED*

## Company profile (live · UK Companies House)

- **Company number:** `11915696`
- **Status:** active
- **Type:** ltd
- **Incorporated:** 2019-03-30
- **Registered office:** Floor 4, Lynton House, 7-12 Tavistock Square, London, WC1H 9LT, England
- **SIC:** 35110

### Officers

- SIALVI, Hassan Mustafa — secretary · appointed 2024-07-22
- GREGORY, Maria — director · British · appointed 2024-07-22
- MCSHANE, Anthony Thomas — director · British · appointed 2023-10-14
- GREGORY, Maria — secretary · appointed 2023-07-23 · resigned 2024-07-22
- OYEGOKE, Toye — secretary · appointed 2021-09-13 · resigned 2023-07-23
- [VISTRA COSEC LIMITED](https://whiteintel.dev/entity/c0d53d7b-482f-52f7-af62-7e36b80f875b) — corporate secretary · appointed 2019-03-30 · resigned 2021-09-13
- CHOWDHARY, Priya — director · British · appointed 2022-06-21 · resigned 2023-07-23
- COOK, Iain — director · British · appointed 2023-10-14 · resigned 2024-07-22
- EDGAR, Matthew John — director · Australian · appointed 2020-11-23 · resigned 2022-06-08
- HOWIE, Andrew Tristan — director · British · appointed 2022-06-21 · resigned 2023-10-14
- KOLTIS, Tommy John — director · American · appointed 2019-03-30 · resigned 2023-10-14
- MULCAHY, Matthew Robert — director · American · appointed 2019-03-30 · resigned 2022-06-21
- WILSON, Stuart Andrew — director · Australian · appointed 2020-11-23 · resigned 2022-03-30

### Beneficial owners (Persons with Significant Control)

- [Encyclis Bidco Limited](https://whiteintel.dev/entity/e3ea7a1c-0aa3-51b8-808b-57503d2668a2) — 75–100% shares · corporate PSC · England — since 2022-06-08
- [Green Empire Wte Holdings Limited](https://whiteintel.dev/entity/9cacab9a-8f33-52aa-883c-6228d7e723dc) — 50–75% shares · corporate PSC · United Kingdom — ceased 2022-06-08
- [Covanta Europe Investments Limted](https://whiteintel.dev/entity/a79137b3-8554-5e1c-9dd3-5f7071c6c813) — 25–50% shares · corporate PSC · United Kingdom — ceased 2022-06-08

## Provenance

- OpenOwnership — https://find-and-update.company-information.service.gov.uk/company/11915696

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **ENCYCLIS PROTOS HOLDCO LIMITED**. Human view: https://whiteintel.dev/entity/3dcfd831-b29d-548a-b330-a4e8efdcbbb8 · Structured JSON: https://whiteintel.dev/api/public/dossier/3dcfd831-b29d-548a-b330-a4e8efdcbbb8._

_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"._