---
title: "Atlas Venture Associates XI, LLC — Ownership Dossier"
canonical: https://whiteintel.dev/entity/8a09056a-29bd-5202-b79f-30dd1c1582c8
json: https://whiteintel.dev/api/public/dossier/8a09056a-29bd-5202-b79f-30dd1c1582c8
identifier: sec:0001780067
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Atlas Venture Associates XI, LLC

**Type:** Person  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001780067`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/8a09056a-29bd-5202-b79f-30dd1c1582c8  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/8a09056a-29bd-5202-b79f-30dd1c1582c8  

## Ownership & control

### Holdings / subsidiaries

- **Sionna Therapeutics, Inc.** (10% owner) — https://whiteintel.dev/entity/36003c1e-2a7d-5ea2-a95f-e01c345a874c
- **Sionna Therapeutics, Inc.** (10% owner) — https://whiteintel.dev/entity/36003c1e-2a7d-5ea2-a95f-e01c345a874c
- **Sionna Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/36003c1e-2a7d-5ea2-a95f-e01c345a874c
- **Dyne Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/6f3d0b50-7aa7-52a8-a2f9-11ef56e96f8c
- **Xilio Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/985ac0f2-bc6f-5a09-a727-79dcd06514ef
- **Korro Bio, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/71e9bcfd-4176-551b-b776-01b734a2fd82
- **Third Harmonic Bio, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/e1b6fe48-1324-5dbb-bd90-38bb4c119af2
- **Day One Biopharmaceuticals, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/f84c84e2-4e61-565b-94e2-fe9a1c41646f
- **IKENA ONCOLOGY, INC.** (tenpercentowner) — https://whiteintel.dev/entity/f9029479-562f-556f-b3f1-0280f03ade9d
- **Akero Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/1f3a658e-849c-5eb6-bb63-c6eefc0a7b8b

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Atlas Venture Associates XI, LLC**. Human view: https://whiteintel.dev/entity/8a09056a-29bd-5202-b79f-30dd1c1582c8 · Structured JSON: https://whiteintel.dev/api/public/dossier/8a09056a-29bd-5202-b79f-30dd1c1582c8._

_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"._