---
title: "THIRD ROCK VENTURES II, L.P. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/5cd3242e-7d4d-535b-bf53-a8ccdcdb8068
json: https://whiteintel.dev/api/public/dossier/5cd3242e-7d4d-535b-bf53-a8ccdcdb8068
identifier: sec:0001488495
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# THIRD ROCK VENTURES II, L.P.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001488495`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/5cd3242e-7d4d-535b-bf53-a8ccdcdb8068  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/5cd3242e-7d4d-535b-bf53-a8ccdcdb8068  

## Ownership & control

### Holdings / subsidiaries

- **JOUNCE THERAPEUTICS, INC.** (tenpercentowner) — https://whiteintel.dev/entity/779ae22f-db7f-5a1a-94bd-bee3b2ea0147
- **Revolution Medicines, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/69f58bea-eda5-5fda-9043-f7c5d5abebe9
- **MYOKARDIA INC** (tenpercentowner) — https://whiteintel.dev/entity/b946fa1d-37d5-50ce-9abc-7ca5d1fc21ec
- **ALLENA PHARMACEUTICALS, INC.** (tenpercentowner) — https://whiteintel.dev/entity/9192dfbb-faf9-50b0-bf5b-3a2af9ebb988
- **GLOBAL BLOOD THERAPEUTICS, INC.** (tenpercentowner) — https://whiteintel.dev/entity/7846277f-7b36-525b-8d18-5b7c3a279282
- **Blueprint Medicines Corp** (tenpercentowner) — https://whiteintel.dev/entity/33b8dd42-5b96-5972-b8b6-0f464dd1a2c6
- **Sage Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/e1a91a56-0391-5d6e-9f93-0da42f8dd395

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **THIRD ROCK VENTURES II, L.P.**. Human view: https://whiteintel.dev/entity/5cd3242e-7d4d-535b-bf53-a8ccdcdb8068 · Structured JSON: https://whiteintel.dev/api/public/dossier/5cd3242e-7d4d-535b-bf53-a8ccdcdb8068._

_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"._