---
title: "WILLIAMS MARK J — Ownership Dossier"
canonical: https://whiteintel.dev/entity/19c93800-eafd-5c13-8430-7fdc6b1ef7cc
json: https://whiteintel.dev/api/public/dossier/19c93800-eafd-5c13-8430-7fdc6b1ef7cc
identifier: sec:0001299517
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# WILLIAMS MARK J

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001299517`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/19c93800-eafd-5c13-8430-7fdc6b1ef7cc  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/19c93800-eafd-5c13-8430-7fdc6b1ef7cc  

## Ownership & control

### Holdings / subsidiaries

- **BLACKROCK CREDIT OPPORTUNITIES TRUST** (other) — https://whiteintel.dev/entity/756a2ae4-00b7-5e80-9635-a97d3d42b9a9
- **BLACKROCK DEFINED OPPORTUNITY CREDIT TRUST** (other) — https://whiteintel.dev/entity/5f9aab48-de70-50ba-86d3-1bb9c956dfcb
- **BLACKROCK FLOATING RATE INCOME STRATEGIES FUND II INC** (other) — https://whiteintel.dev/entity/17fcde2e-a961-5675-81f1-e113a09185fb
- **BLACKROCK SENIOR FLOATING RATE FUND, INC.** (other) — https://whiteintel.dev/entity/c5005655-be90-5b1e-8c52-f14085458a0c
- **BLACKROCK Ltd DURATION INCOME TRUST** (other) — https://whiteintel.dev/entity/9fdaeeb7-8557-5741-876b-32dcb71dbc39
- **MASTER SENIOR FLOATING RATE LLC** (other) — https://whiteintel.dev/entity/544271bc-ad5c-507f-84fc-4875ff0373cf
- **BLACKROCK DEBT STRATEGIES FUND, INC.** (other) — https://whiteintel.dev/entity/fe9aa302-fe57-53eb-a7af-c331d65c3490
- **BLACKROCK SENIOR FLOATING RATE FUND II, INC.** (other) — https://whiteintel.dev/entity/e0e08ce1-84f8-5528-a224-4dc796a4e47b
- **BLACKROCK DIVERSIFIED INCOME STRATEGIES FUND, INC.** (other) — https://whiteintel.dev/entity/eceaffc4-5dca-5db4-a506-fce8b71b7442
- **BLACKROCK FLOATING RATE INCOME STRATEGIES FUND, INC.** (other) — https://whiteintel.dev/entity/8aaea97b-b093-5d59-9072-78ca9f3aa656
- **BLACKROCK STRATEGIC BOND TRUST** (other) — https://whiteintel.dev/entity/65b49a07-5cb5-50e3-a709-1a9b6018b114
- **BLACKROCK SENIOR HIGH INCOME FUND, INC.** (other) — https://whiteintel.dev/entity/a6d1b079-d009-5cb4-a76a-6221ee5f1a4d

## 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 **WILLIAMS MARK J** — https://whiteintel.dev/entity/19c93800-eafd-5c13-8430-7fdc6b1ef7cc · pricing https://whiteintel.dev/pricing.

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **WILLIAMS MARK J**. Human view: https://whiteintel.dev/entity/19c93800-eafd-5c13-8430-7fdc6b1ef7cc · Structured JSON: https://whiteintel.dev/api/public/dossier/19c93800-eafd-5c13-8430-7fdc6b1ef7cc._

_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"._