---
title: "ATLAS VENTURE ASSOCIATES IX, LLC — Ownership Dossier"
canonical: https://whiteintel.dev/entity/9d2932cd-838b-58d1-9eb0-03aba792c8ec
json: https://whiteintel.dev/api/public/dossier/9d2932cd-838b-58d1-9eb0-03aba792c8ec
identifier: sec:0001671207
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# ATLAS VENTURE ASSOCIATES IX, LLC

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001671207`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/9d2932cd-838b-58d1-9eb0-03aba792c8ec  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/9d2932cd-838b-58d1-9eb0-03aba792c8ec  

## Ownership & control

### Holdings / subsidiaries

- **SURFACE ONCOLOGY, INC.** (tenpercentowner) — https://whiteintel.dev/entity/5dbea9e7-99ee-564a-8db1-1e330fa1db13
- **Cogent Biosciences, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/be57c171-0255-5e6d-a7f8-98e3ec1a701f
- **Spero Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/3e182f58-b9a6-5ea2-96df-347de93659e3
- **Intellia Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/40de17ff-3349-5eb3-93fc-36b1f3a0e901

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **ATLAS VENTURE ASSOCIATES IX, LLC**. Human view: https://whiteintel.dev/entity/9d2932cd-838b-58d1-9eb0-03aba792c8ec · Structured JSON: https://whiteintel.dev/api/public/dossier/9d2932cd-838b-58d1-9eb0-03aba792c8ec._

_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"._