---
title: "MGC VENTURE PARTNERS 2018 GP, LLC — Ownership Dossier"
canonical: https://whiteintel.dev/entity/efce9834-72f0-57b2-b016-2887f1e99020
json: https://whiteintel.dev/api/public/dossier/efce9834-72f0-57b2-b016-2887f1e99020
identifier: sec:0001783291
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MGC VENTURE PARTNERS 2018 GP, LLC

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001783291`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/efce9834-72f0-57b2-b016-2887f1e99020  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/efce9834-72f0-57b2-b016-2887f1e99020  

## Ownership & control

### Holdings / subsidiaries

- **CASTLE BIOSCIENCES INC** (tenpercentowner) — https://whiteintel.dev/entity/b1e1509b-1087-5840-b5ea-73a6d28d9569

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MGC VENTURE PARTNERS 2018 GP, LLC**. Human view: https://whiteintel.dev/entity/efce9834-72f0-57b2-b016-2887f1e99020 · Structured JSON: https://whiteintel.dev/api/public/dossier/efce9834-72f0-57b2-b016-2887f1e99020._

_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"._