---
title: "Third Rock Ventures GP V, LP — Ownership Dossier"
canonical: https://whiteintel.dev/entity/d2ded8f9-0ff2-59f2-965e-d52f10b49638
json: https://whiteintel.dev/api/public/dossier/d2ded8f9-0ff2-59f2-965e-d52f10b49638
identifier: sec:0001977498
jurisdiction: US
risk: Medium
source: WhiteIntel corporate-ownership graph
---

# Third Rock Ventures GP V, LP

**Type:** Person  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001977498`  
**Risk level:** Medium  
**Canonical dossier:** https://whiteintel.dev/entity/d2ded8f9-0ff2-59f2-965e-d52f10b49638  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/d2ded8f9-0ff2-59f2-965e-d52f10b49638  

## Ownership & control

### Holdings / subsidiaries

- **Septerna, Inc.** (10% owner) — https://whiteintel.dev/entity/73a09cf2-416c-5ce7-8f3a-75597df4840f
- **Septerna, Inc.** (10% owner) — https://whiteintel.dev/entity/73a09cf2-416c-5ce7-8f3a-75597df4840f
- **Maze Therapeutics, Inc.** (10% owner) — https://whiteintel.dev/entity/dd91eb35-a8ad-5def-97d9-315d460750d5
- **Maze Therapeutics, Inc.** (10% owner) — https://whiteintel.dev/entity/dd91eb35-a8ad-5def-97d9-315d460750d5
- **Rapport Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/cc7bf129-032c-525c-b8a7-d6d6fe412250
- **Maze Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/dd91eb35-a8ad-5def-97d9-315d460750d5
- **Septerna, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/73a09cf2-416c-5ce7-8f3a-75597df4840f
- **CARGO Therapeutics, Inc.** (tenpercentowner) — https://whiteintel.dev/entity/a783c33b-8f92-53e0-844a-0233eef54b40

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Third Rock Ventures GP V, LP**. Human view: https://whiteintel.dev/entity/d2ded8f9-0ff2-59f2-965e-d52f10b49638 · Structured JSON: https://whiteintel.dev/api/public/dossier/d2ded8f9-0ff2-59f2-965e-d52f10b49638._

_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"._