---
title: "MPM BIOVENTURES IV STRATEGIC FUND, L.P. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/f3ad89ee-afc8-5da4-8301-31bfb2f9d3c9
json: https://whiteintel.dev/api/public/dossier/f3ad89ee-afc8-5da4-8301-31bfb2f9d3c9
identifier: sec:0001577429
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MPM BIOVENTURES IV STRATEGIC FUND, L.P.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001577429`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/f3ad89ee-afc8-5da4-8301-31bfb2f9d3c9  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/f3ad89ee-afc8-5da4-8301-31bfb2f9d3c9  

## Ownership & control

### Holdings / subsidiaries

- **Syndax Pharmaceuticals Inc** (tenpercentowner) — https://whiteintel.dev/entity/6bf1b313-1d8f-5b91-99ed-9315f51eef71
- **EPIZYME, INC.** (tenpercentowner) — https://whiteintel.dev/entity/1962d800-cae3-56fc-a964-5bee0a4135a8

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MPM BIOVENTURES IV STRATEGIC FUND, L.P.**. Human view: https://whiteintel.dev/entity/f3ad89ee-afc8-5da4-8301-31bfb2f9d3c9 · Structured JSON: https://whiteintel.dev/api/public/dossier/f3ad89ee-afc8-5da4-8301-31bfb2f9d3c9._

_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"._