---
title: "BLOCK STEPHEN A — Ownership Dossier"
canonical: https://whiteintel.dev/entity/de5a3709-ea2c-5df5-8bc1-b3373bd6b563
json: https://whiteintel.dev/api/public/dossier/de5a3709-ea2c-5df5-8bc1-b3373bd6b563
identifier: sec:0001183721
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# BLOCK STEPHEN A

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001183721`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/de5a3709-ea2c-5df5-8bc1-b3373bd6b563  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/de5a3709-ea2c-5df5-8bc1-b3373bd6b563  

## Ownership & control

### Holdings / subsidiaries

- **ChromaDex Corp.** (director) — https://whiteintel.dev/entity/2a41ba57-3039-521c-8174-17a4da3cab95
- **SENOMYX INC** (director) — https://whiteintel.dev/entity/e2847232-4327-5e05-b108-f994dc1bfedb

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **BLOCK STEPHEN A**. Human view: https://whiteintel.dev/entity/de5a3709-ea2c-5df5-8bc1-b3373bd6b563 · Structured JSON: https://whiteintel.dev/api/public/dossier/de5a3709-ea2c-5df5-8bc1-b3373bd6b563._

_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"._