---
title: "MAYFIELD IX MANAGEMENT LLC — Ownership Dossier"
canonical: https://whiteintel.dev/entity/f7500964-7633-5dbe-bb1a-d40d3bf83368
json: https://whiteintel.dev/api/public/dossier/f7500964-7633-5dbe-bb1a-d40d3bf83368
identifier: sec:0001041586
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# MAYFIELD IX MANAGEMENT LLC

**Type:** Company  
**Jurisdiction:** US  
**Identifier:** `sec:0001041586`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/f7500964-7633-5dbe-bb1a-d40d3bf83368  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/f7500964-7633-5dbe-bb1a-d40d3bf83368  

## Ownership & control

### Holdings / subsidiaries

- **3PAR INC.** (other) — https://whiteintel.dev/entity/7481071a-3eb8-5dd2-beb4-48865910d6ad
- **SENORX INC** (other) — https://whiteintel.dev/entity/4cf10452-f44a-5e89-addf-680fba9259b9
- **NORTHSTAR NEUROSCIENCE, INC.** (other) — https://whiteintel.dev/entity/7d032c2c-6f53-5fcc-8188-e45c7539a8c5
- **VARSITY GROUP INC** (other) — https://whiteintel.dev/entity/0cc0803e-afad-5c49-b92c-739ba314a8d4

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **MAYFIELD IX MANAGEMENT LLC**. Human view: https://whiteintel.dev/entity/f7500964-7633-5dbe-bb1a-d40d3bf83368 · Structured JSON: https://whiteintel.dev/api/public/dossier/f7500964-7633-5dbe-bb1a-d40d3bf83368._

_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"._