---
title: "THIRD ROCK VENTURES GP, L.P. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/f09bbbd5-4f56-532e-8757-ffc49be560ed
json: https://whiteintel.dev/api/public/dossier/f09bbbd5-4f56-532e-8757-ffc49be560ed
identifier: sec:0001578976
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# THIRD ROCK VENTURES GP, L.P.

**Type:** Company  
**Jurisdiction:** US  
**Identifier:** `sec:0001578976`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/f09bbbd5-4f56-532e-8757-ffc49be560ed  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/f09bbbd5-4f56-532e-8757-ffc49be560ed  

## Ownership & control

### Holdings / subsidiaries

- **CONSTELLATION PHARMACEUTICALS INC** (tenpercentowner) — https://whiteintel.dev/entity/3e050f89-697d-556a-8ad6-0eed0970e7b0
- **RHYTHM PHARMACEUTICALS, INC.** (tenpercentowner) — https://whiteintel.dev/entity/fa951071-e445-5c3f-9817-53aaddc9e6a0
- **CytomX Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/6548f99c-6754-59ef-a2b1-ed7cd21f6d1b
- **Larimar Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/72e3523f-efab-5ee4-b03e-4139df749767
- **FOUNDATION MEDICINE, INC.** (tenpercentowner) — https://whiteintel.dev/entity/f68cd8e2-f33d-56d8-8778-0c137ae262c3
- **AGIOS PHARMACEUTICALS, INC.** (tenpercentowner) — https://whiteintel.dev/entity/2c50afe3-b767-51de-9f1e-d25fda50bd09
- **bluebird bio, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/2368d4d2-afa3-5231-9caf-a54123271869
- **Carisma Therapeutics Inc.** (tenpercentowner) — https://whiteintel.dev/entity/a9fad273-9024-53b6-8c78-027b6762d4e2

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **THIRD ROCK VENTURES GP, L.P.**. Human view: https://whiteintel.dev/entity/f09bbbd5-4f56-532e-8757-ffc49be560ed · Structured JSON: https://whiteintel.dev/api/public/dossier/f09bbbd5-4f56-532e-8757-ffc49be560ed._

_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"._