---
title: "ATLAS VENTURE ASSOCIATES X, L.P. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/76e91b3a-e1e9-5b7e-b4b1-40c82339bb6c
json: https://whiteintel.dev/api/public/dossier/76e91b3a-e1e9-5b7e-b4b1-40c82339bb6c
identifier: sec:0001742766
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# ATLAS VENTURE ASSOCIATES X, L.P.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001742766`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/76e91b3a-e1e9-5b7e-b4b1-40c82339bb6c  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/76e91b3a-e1e9-5b7e-b4b1-40c82339bb6c  

## Ownership & control

### Holdings / subsidiaries

- **Generation Bio Co.** (tenpercentowner) — https://whiteintel.dev/entity/874fc8b2-e483-5bec-9fe2-0b7ed80f10ce
- **Kymera Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/ee121c9c-c882-5afe-93fb-7abe6b4ca8d7
- **Q32 Bio Inc.** (tenpercentowner) — https://whiteintel.dev/entity/08894b83-faf4-53f2-980d-374ae48ff38a
- **Disc Medicine, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/6d317465-e113-5fee-9632-915c2579af2d
- **IKENA ONCOLOGY, INC.** (tenpercentowner) — https://whiteintel.dev/entity/f9029479-562f-556f-b3f1-0280f03ade9d
- **Day One Biopharmaceuticals, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/f84c84e2-4e61-565b-94e2-fe9a1c41646f
- **Tectonic Therapeutic, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/f4637bbf-8499-5a1e-807a-1208124b3d8d
- **Dianthus Therapeutics, Inc. /DE/** (tenpercentowner) — https://whiteintel.dev/entity/6a3adac7-6100-5ac2-87d8-2e2620ec6a23
- **Replimune Group, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/2a9e232f-1c55-5a2d-a5ad-a8f772329c57

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **ATLAS VENTURE ASSOCIATES X, L.P.**. Human view: https://whiteintel.dev/entity/76e91b3a-e1e9-5b7e-b4b1-40c82339bb6c · Structured JSON: https://whiteintel.dev/api/public/dossier/76e91b3a-e1e9-5b7e-b4b1-40c82339bb6c._

_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"._