---
title: "Dr Sarah Jennie Kastner — Ownership Dossier"
canonical: https://whiteintel.dev/entity/c9c3ec98-e093-4f59-aed6-b0d33dd58032
json: https://whiteintel.dev/api/public/dossier/c9c3ec98-e093-4f59-aed6-b0d33dd58032
identifier: psc:zCbhOQGJaMy7yfPsQbmY-9F4Z7o
jurisdiction: GB
risk: Low
source: WhiteIntel corporate-ownership graph
---

# Dr Sarah Jennie Kastner

**Type:** Person  
**Jurisdiction:** GB  
**Identifier:** `psc:zCbhOQGJaMy7yfPsQbmY-9F4Z7o`  
**Risk level:** Low  
**Canonical dossier:** https://whiteintel.dev/entity/c9c3ec98-e093-4f59-aed6-b0d33dd58032  
**Structured JSON / MCP:** https://whiteintel.dev/api/public/dossier/c9c3ec98-e093-4f59-aed6-b0d33dd58032  

## Ownership & control

### Holdings / subsidiaries

- **SAWSTON PARTNERSHIP LIMITED** (beneficial owner) — 87.5% — https://whiteintel.dev/entity/a3d1ec2c-c858-5b59-a7d2-e4d833a1abec

---

_This is the markdown-for-agents view of the WhiteIntel dossier for **Dr Sarah Jennie Kastner**. Human view: https://whiteintel.dev/entity/c9c3ec98-e093-4f59-aed6-b0d33dd58032 · Structured JSON: https://whiteintel.dev/api/public/dossier/c9c3ec98-e093-4f59-aed6-b0d33dd58032._

_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"._