---
title: "KEITHLEY JOSEPH P — Ownership Dossier"
canonical: https://whiteintel.dev/entity/773879f2-c1af-5844-be8c-1908577f14f9
json: https://whiteintel.dev/api/public/dossier/773879f2-c1af-5844-be8c-1908577f14f9
identifier: sec:0001073329
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# KEITHLEY JOSEPH P

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001073329`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/773879f2-c1af-5844-be8c-1908577f14f9  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/773879f2-c1af-5844-be8c-1908577f14f9  

## Ownership & control

### Holdings / subsidiaries

- **KEITHLEY INSTRUMENTS INC** (tenpercentowner) — https://whiteintel.dev/entity/9b0306fb-c181-5b89-8446-e7e3d99980ed
- **NORDSON CORP** (director) — https://whiteintel.dev/entity/fcc76ab8-c816-55b7-9068-0376e7e19d9f
- **MATERION Corp** (director) — https://whiteintel.dev/entity/2ee013a2-09fa-5940-9717-1feb26847be9
- **KEITHLEY INSTRUMENTS INC** (officer) — https://whiteintel.dev/entity/9b0306fb-c181-5b89-8446-e7e3d99980ed
- **KEITHLEY INSTRUMENTS INC** (director) — https://whiteintel.dev/entity/9b0306fb-c181-5b89-8446-e7e3d99980ed
- **AXCELIS TECHNOLOGIES INC** (director) — https://whiteintel.dev/entity/6b7c3b93-b4d4-5fcf-92ff-29e1bf13258a

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **KEITHLEY JOSEPH P**. Human view: https://whiteintel.dev/entity/773879f2-c1af-5844-be8c-1908577f14f9 · Structured JSON: https://whiteintel.dev/api/public/dossier/773879f2-c1af-5844-be8c-1908577f14f9._

_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"._