---
title: "BUCHANAN WILLIAM B. JR. — Ownership Dossier"
canonical: https://whiteintel.dev/entity/be4291af-6cfd-595c-a910-c0dddfca7ac1
json: https://whiteintel.dev/api/public/dossier/be4291af-6cfd-595c-a910-c0dddfca7ac1
identifier: sec:0001823458
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# BUCHANAN WILLIAM B. JR.

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001823458`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/be4291af-6cfd-595c-a910-c0dddfca7ac1  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/be4291af-6cfd-595c-a910-c0dddfca7ac1  

## Ownership & control

### Holdings / subsidiaries

- **APEXIGEN, INC.** (tenpercentowner) — https://whiteintel.dev/entity/0b7d3740-b0b6-5f94-8f2a-a7cd28038e3d

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **BUCHANAN WILLIAM B. JR.**. Human view: https://whiteintel.dev/entity/be4291af-6cfd-595c-a910-c0dddfca7ac1 · Structured JSON: https://whiteintel.dev/api/public/dossier/be4291af-6cfd-595c-a910-c0dddfca7ac1._

_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"._