---
title: "Duff Mark — Ownership Dossier"
canonical: https://whiteintel.dev/entity/f07322fc-d3bc-5e8b-8d18-0597fed837ce
json: https://whiteintel.dev/api/public/dossier/f07322fc-d3bc-5e8b-8d18-0597fed837ce
identifier: sec:0001678382
jurisdiction: US
risk: Medium
source: WhiteIntel corporate-ownership graph
---

# Duff Mark

**Type:** Person  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001678382`  
**Risk level:** Medium  
**Canonical dossier:** https://whiteintel.dev/entity/f07322fc-d3bc-5e8b-8d18-0597fed837ce  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/f07322fc-d3bc-5e8b-8d18-0597fed837ce  

## Ownership & control

### Holdings / subsidiaries

- **PERMA FIX ENVIRONMENTAL SERVICES INC** (officer) — https://whiteintel.dev/entity/6b630eb1-0223-5b63-aa76-ce3c292ed6dd
- **PERMA FIX ENVIRONMENTAL SERVICES INC** (officer) — https://whiteintel.dev/entity/6b630eb1-0223-5b63-aa76-ce3c292ed6dd
- **PERMA FIX ENVIRONMENTAL SERVICES INC** (officer) — https://whiteintel.dev/entity/6b630eb1-0223-5b63-aa76-ce3c292ed6dd
- **PERMA FIX ENVIRONMENTAL SERVICES INC** (officer) — https://whiteintel.dev/entity/6b630eb1-0223-5b63-aa76-ce3c292ed6dd
- **PERMA FIX ENVIRONMENTAL SERVICES INC** (director) — https://whiteintel.dev/entity/6b630eb1-0223-5b63-aa76-ce3c292ed6dd

## Get the full, resolved dossier (agent-callable)

The above is the free teaser. The resolved **multi-hop UBO chain**, ownership **%**, full **financial history**, itemised **assets** and the hop-by-hop **exposure path** are the paid depth — callable as tools from your agent:

```bash
npx -y @whiteintel/mcp-server   # then: get_dossier · trace_ownership_path · check_offshore_exposure
```

Or unlock a one-off cited dossier for **Duff Mark** — https://whiteintel.dev/entity/f07322fc-d3bc-5e8b-8d18-0597fed837ce · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Duff Mark**. Human view: https://whiteintel.dev/entity/f07322fc-d3bc-5e8b-8d18-0597fed837ce · Structured JSON: https://whiteintel.dev/api/public/dossier/f07322fc-d3bc-5e8b-8d18-0597fed837ce._

_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"._