---
title: "Trinseo PLC — Ownership Dossier"
canonical: https://whiteintel.dev/entity/d13a44a7-6ad2-5db3-a175-c190146023cf
json: https://whiteintel.dev/api/public/dossier/d13a44a7-6ad2-5db3-a175-c190146023cf
identifier: sec:0001519061
jurisdiction: US
risk: High
source: WhiteIntel corporate-ownership graph
---

# Trinseo PLC

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001519061`  
**Risk level:** High  
**Canonical dossier:** https://whiteintel.dev/entity/d13a44a7-6ad2-5db3-a175-c190146023cf  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/d13a44a7-6ad2-5db3-a175-c190146023cf  

## Ownership & control

### Owners / controllers

- **M&G INVESTMENT MANAGEMENT LTD** (tenpercentowner) — https://whiteintel.dev/entity/6150327a-50b8-58fe-983d-2a3090af9830
- **BAIN CAPITAL FUND X LP** (tenpercentowner) — https://whiteintel.dev/entity/ef6b4e82-5f75-51e2-a991-6ea7b676af74
- **HAUSER FELIX** (tenpercentowner) — https://whiteintel.dev/entity/0b3bb555-af01-55fd-ba30-93c85921e9ae
- **ZIDE STEPHEN M** (tenpercentowner) — https://whiteintel.dev/entity/33758a57-4145-50a2-9b8c-72146ed5d4e7
- **BAIN CAPITAL PARTNERS X, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/fa583d56-c1c0-538f-afdd-ad66b29b976f
- **BCIP TRUST ASSOCIATES IV, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/fe281a5f-6bd2-52b3-bb32-e53e2ceeba0a
- **SPRINGHAM RUTH** (tenpercentowner) — https://whiteintel.dev/entity/6b8db449-d995-5278-863d-60479274aa03
- **BAIN CAPITAL EVEREST MANAGER S.A.R.L.** (tenpercentowner) — https://whiteintel.dev/entity/4b967019-03c8-5d89-baa5-757602867173
- **BAIN CAPITAL EUROPE FUND III, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/938216aa-0058-5885-ad74-c9d49b1c6ed7
- **BAIN CAPITAL PARTNERS EUROPE III, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/a5cc30c4-b60e-5f0c-85bd-2d3f95d63516
- **VASSEUR AURELIEN** (tenpercentowner) — https://whiteintel.dev/entity/be95e24e-b280-5550-b89c-7953124b90fb
- **PLANTEVIN MICHEL** (tenpercentowner) — https://whiteintel.dev/entity/5c585e23-c89a-5809-86a6-84236d28258e
- **BCIP TRUST ASSOCIATES IV-B, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/799a86b1-5cff-5dc8-a8ad-5e96443550a0
- **BCIP ASSOCIATES IV-B, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/223667cd-eb08-5c56-9cf2-a36da247c2c9
- **BAIN CAPITAL INVESTORS LLC** (tenpercentowner) — https://whiteintel.dev/entity/8bfab23b-fec3-5ed5-bb0e-46910c032595
- **THOMAS STEPHEN F.** (tenpercentowner) — https://whiteintel.dev/entity/3f4fb69a-28f6-50e5-97ad-233601cda9bb
- **BCIP ASSOCIATES IV, L.P.** (tenpercentowner) — https://whiteintel.dev/entity/5ec90bc9-a5dc-5937-99be-d49ad276ad23
- **BAIN CAPITAL EVEREST MANAGER HOLDING SCA** (tenpercentowner) — https://whiteintel.dev/entity/7767281c-7524-5bd5-a5c7-6322788609ee
- **MEISEL SETH** (tenpercentowner) — https://whiteintel.dev/entity/b69edf62-061f-577f-b5b0-2a47ae68ed15
- **CHU BRIAN** (tenpercentowner) — https://whiteintel.dev/entity/17623a62-a5a7-5cd0-a79f-1c27c0e9c1a1

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

A **106-step** ownership/control chain to the ultimate beneficial owner is resolved for this entity. The full cited chain unlocks with a paid API key or a one-off dossier — https://whiteintel.dev/pricing.

## 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 **Trinseo PLC** — https://whiteintel.dev/entity/d13a44a7-6ad2-5db3-a175-c190146023cf · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Trinseo PLC**. Human view: https://whiteintel.dev/entity/d13a44a7-6ad2-5db3-a175-c190146023cf · Structured JSON: https://whiteintel.dev/api/public/dossier/d13a44a7-6ad2-5db3-a175-c190146023cf._

_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"._