---
title: "ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/cfc745a7-8e02-5180-b8b7-b050f1fb6e4a
json: https://whiteintel.dev/api/public/dossier/cfc745a7-8e02-5180-b8b7-b050f1fb6e4a
identifier: sec:0001780065
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001780065`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/cfc745a7-8e02-5180-b8b7-b050f1fb6e4a  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/cfc745a7-8e02-5180-b8b7-b050f1fb6e4a  

## Ownership & control

### Holdings / subsidiaries

- **Generation Bio Co.** (tenpercentowner) — https://whiteintel.dev/entity/874fc8b2-e483-5bec-9fe2-0b7ed80f10ce
- **Vigil Neuroscience, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/dd4bafe3-c407-5c5a-9484-16d939ab9a60
- **Kymera Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/ee121c9c-c882-5afe-93fb-7abe6b4ca8d7
- **Xilio Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/985ac0f2-bc6f-5a09-a727-79dcd06514ef
- **Dyne Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/6f3d0b50-7aa7-52a8-a2f9-11ef56e96f8c
- **Disc Medicine, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/6d317465-e113-5fee-9632-915c2579af2d
- **Q32 Bio Inc.** (tenpercentowner) — https://whiteintel.dev/entity/08894b83-faf4-53f2-980d-374ae48ff38a
- **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
- **Dianthus Therapeutics, Inc. /DE/** (other) — https://whiteintel.dev/entity/6a3adac7-6100-5ac2-87d8-2e2620ec6a23
- **Replimune Group, Inc.** (other) — https://whiteintel.dev/entity/2a9e232f-1c55-5a2d-a5ad-a8f772329c57

…and **2** more subsidiaries/holdings. Resolve the full list with `get_dossier` on the WhiteIntel MCP (`npx -y @whiteintel/mcp-server`) or a one-off dossier — https://whiteintel.dev/pricing.

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P.** — https://whiteintel.dev/entity/cfc745a7-8e02-5180-b8b7-b050f1fb6e4a · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **ATLAS VENTURE ASSOCIATES OPPORTUNITY I, L.P.**. Human view: https://whiteintel.dev/entity/cfc745a7-8e02-5180-b8b7-b050f1fb6e4a · Structured JSON: https://whiteintel.dev/api/public/dossier/cfc745a7-8e02-5180-b8b7-b050f1fb6e4a._

_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"._