---
title: "QUARTZ CO-INVEST, L.P. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/4f5693e7-1928-5da9-8ea5-da4d2970ae3f
json: https://whiteintel.dev/api/public/dossier/4f5693e7-1928-5da9-8ea5-da4d2970ae3f
identifier: sec:0001620042
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# QUARTZ CO-INVEST, L.P.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001620042`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/4f5693e7-1928-5da9-8ea5-da4d2970ae3f  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/4f5693e7-1928-5da9-8ea5-da4d2970ae3f  

## Ownership & control

### Holdings / subsidiaries

- **Ecovyst Inc.** (tenpercentowner) — https://whiteintel.dev/entity/5c5f502f-7fd2-570f-958b-d776846a5a19

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **QUARTZ CO-INVEST, L.P.**. Human view: https://whiteintel.dev/entity/4f5693e7-1928-5da9-8ea5-da4d2970ae3f · Structured JSON: https://whiteintel.dev/api/public/dossier/4f5693e7-1928-5da9-8ea5-da4d2970ae3f._

_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"._