---
title: "ARCH Venture Fund XII, L.P. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/39702e5b-b6cb-52e6-9d7a-5bc59e952469
json: https://whiteintel.dev/api/public/dossier/39702e5b-b6cb-52e6-9d7a-5bc59e952469
identifier: sec:0001906837
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# ARCH Venture Fund XII, L.P.

**Type:** Person  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001906837`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/39702e5b-b6cb-52e6-9d7a-5bc59e952469  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/39702e5b-b6cb-52e6-9d7a-5bc59e952469  

## Ownership & control

### Holdings / subsidiaries

- **Metsera, Inc.** (10% owner) — https://whiteintel.dev/entity/545e3c76-456f-5273-ab91-538a1a34ba68
- **Metsera, Inc.** (10% owner) — https://whiteintel.dev/entity/545e3c76-456f-5273-ab91-538a1a34ba68
- **SEAPORT THERAPEUTICS, INC.** (tenpercentowner) — https://whiteintel.dev/entity/1d64b77d-e11f-54cc-9a08-50d627926fcb
- **Metsera, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/545e3c76-456f-5273-ab91-538a1a34ba68
- **Neumora Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/1215113d-0999-5daf-9908-343ef157702c
- **Metsera, Inc.** (director) — https://whiteintel.dev/entity/545e3c76-456f-5273-ab91-538a1a34ba68
- **Prime Medicine, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/88ba017d-558f-5834-9839-6564794aca6f
- **Rapport Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/cc7bf129-032c-525c-b8a7-d6d6fe412250

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **ARCH Venture Fund XII, L.P.**. Human view: https://whiteintel.dev/entity/39702e5b-b6cb-52e6-9d7a-5bc59e952469 · Structured JSON: https://whiteintel.dev/api/public/dossier/39702e5b-b6cb-52e6-9d7a-5bc59e952469._

_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"._