---
title: "WINTHROP JOHN — Ownership Dossier"
canonical: https://whiteintel.dev/entity/04b68643-bdca-5e31-a33a-e9cc903e1b3d
json: https://whiteintel.dev/api/public/dossier/04b68643-bdca-5e31-a33a-e9cc903e1b3d
identifier: sec:0001172313
jurisdiction: US
risk: Low
source: WhiteIntel corporate-ownership graph
---

# WINTHROP JOHN

**Type:** Company  
**Jurisdiction:** [US](https://whiteintel.dev/jurisdictions/us)  
**Identifier:** `sec:0001172313`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/04b68643-bdca-5e31-a33a-e9cc903e1b3d  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/04b68643-bdca-5e31-a33a-e9cc903e1b3d  

## Ownership & control

### Holdings / subsidiaries

- **PIONEER DIVERSIFIED HIGH INCOME FUND, INC.** (other) — https://whiteintel.dev/entity/2a99a350-f76f-59a6-bde9-d14437b1268c

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **WINTHROP JOHN**. Human view: https://whiteintel.dev/entity/04b68643-bdca-5e31-a33a-e9cc903e1b3d · Structured JSON: https://whiteintel.dev/api/public/dossier/04b68643-bdca-5e31-a33a-e9cc903e1b3d._

_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"._